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| SYNCHRONOUS ETHERNET WAN PLL IDT82V3385 Version 2 March 23, 2009 6024 Silver Creek Valley Road, San Jose, CA 95138 Telephone: (800) 345-7015 * TWX: 910-338-2070 * FAX: (408) 284-2775 Printed in U.S.A. (c) 2009 Integrated Device Technology, Inc. DISCLAIMER Integrated Device Technology, Inc. reserves the right to make changes to its products or specifications at any time, without notice, in order to improve design or performance and to supply the best possible product. IDT does not assume any responsibility for use of any circuitry described other than the circuitry embodied in an IDT product. The Company makes no representations that circuitry described herein is free from patent infringement or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent, patent rights or other rights, of Integrated Device Technology, Inc. LIFE SUPPORT POLICY Integrated Device Technology's products are not authorized for use as critical components in life support devices or systems unless a specific written agreement pertaining to such intended use is executed between the manufacturer and an officer of IDT. 1. Life support devices or systems are devices or systems which (a) are intended for surgical implant into the body or (b) support or sustain life and whose failure to perform, when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. 2. A critical component is any components of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. Table of Contents FEATURES .............................................................................................................................................................................. 9 HIGHLIGHTS.................................................................................................................................................................................................... 9 MAIN FEATURES ............................................................................................................................................................................................ 9 OTHER FEATURES ......................................................................................................................................................................................... 9 APPLICATIONS....................................................................................................................................................................... 9 DESCRIPTION....................................................................................................................................................................... 10 FUNCTIONAL BLOCK DIAGRAM ........................................................................................................................................ 11 1 PIN ASSIGNMENT ........................................................................................................................................................... 12 2 PIN DESCRIPTION .......................................................................................................................................................... 13 3 FUNCTIONAL DESCRIPTION ......................................................................................................................................... 18 RESET ........................................................................................................................................................................................................... 18 MASTER CLOCK .......................................................................................................................................................................................... 18 INPUT CLOCKS & FRAME SYNC SIGNAL ................................................................................................................................................. 19 3.3.1 Input Clocks .................................................................................................................................................................................... 19 3.3.2 Frame SYNC Input Signals ............................................................................................................................................................ 19 3.4 INPUT CLOCK PRE-DIVIDER ...................................................................................................................................................................... 20 3.5 INPUT CLOCK QUALITY MONITORING ..................................................................................................................................................... 21 3.5.1 Activity Monitoring ......................................................................................................................................................................... 21 3.5.2 Frequency Monitoring ................................................................................................................................................................... 22 3.6 T0 / T4 DPLL INPUT CLOCK SELECTION .................................................................................................................................................. 23 3.6.1 External Fast Selection (T0 only) .................................................................................................................................................. 23 3.6.2 Forced Selection ............................................................................................................................................................................ 24 3.6.3 Automatic Selection ....................................................................................................................................................................... 24 3.7 SELECTED INPUT CLOCK MONITORING .................................................................................................................................................. 25 3.7.1 T0 / T4 DPLL Locking Detection ................................................................................................................................................... 25 3.7.1.1 Fast Loss .......................................................................................................................................................................... 25 3.7.1.2 Coarse Phase Loss .......................................................................................................................................................... 25 3.7.1.3 Fine Phase Loss ............................................................................................................................................................... 25 3.7.1.4 Hard Limit Exceeding ....................................................................................................................................................... 25 3.7.2 Locking Status ............................................................................................................................................................................... 25 3.7.3 Phase Lock Alarm (T0 only) .......................................................................................................................................................... 26 3.8 SELECTED INPUT CLOCK SWITCH ........................................................................................................................................................... 27 3.8.1 Input Clock Validity ........................................................................................................................................................................ 27 3.8.2 Selected Input Clock Switch ......................................................................................................................................................... 27 3.8.2.1 Revertive Switch ............................................................................................................................................................... 27 3.8.2.2 Non-Revertive Switch (T0 only) ........................................................................................................................................ 28 3.8.3 Selected / Qualified Input Clocks Indication ................................................................................................................................ 28 3.9 SELECTED INPUT CLOCK STATUS VS. DPLL OPERATING MODE ....................................................................................................... 29 3.9.1 T0 Selected Input Clock vs. DPLL Operating Mode .................................................................................................................... 29 3.9.2 T4 Selected Input Clock vs. DPLL Operating Mode .................................................................................................................... 31 3.10 T0 / T4 DPLL OPERATING MODE ............................................................................................................................................................... 32 3.10.1 T0 DPLL Operating Mode .............................................................................................................................................................. 32 3.10.1.1 Free-Run Mode ................................................................................................................................................................ 32 3.10.1.2 Pre-Locked Mode ............................................................................................................................................................. 32 3.10.1.3 Locked Mode .................................................................................................................................................................... 32 3.10.1.3.1 Temp-Holdover Mode .................................................................................................................................... 32 3.1 3.2 3.3 Table of Contents 3 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL 3.11 3.12 3.13 3.14 3.15 3.16 3.17 4.1 5.1 5.2 5.3 5.4 5.5 3.10.1.4 Lost-Phase Mode ............................................................................................................................................................. 32 3.10.1.5 Holdover Mode ................................................................................................................................................................. 32 3.10.1.5.1 Automatic Instantaneous ............................................................................................................................... 33 3.10.1.5.2 Automatic Slow Averaged ............................................................................................................................. 33 3.10.1.5.3 Automatic Fast Averaged .............................................................................................................................. 33 3.10.1.5.4 Manual ........................................................................................................................................................... 33 3.10.1.5.5 Holdover Frequency Offset Read .................................................................................................................. 33 3.10.1.6 Pre-Locked2 Mode ........................................................................................................................................................... 33 3.10.2 T4 DPLL Operating Mode .............................................................................................................................................................. 33 3.10.2.1 Free-Run Mode ................................................................................................................................................................ 33 3.10.2.2 Locked Mode .................................................................................................................................................................... 33 3.10.2.3 Holdover Mode ................................................................................................................................................................. 33 T0 / T4 DPLL OUTPUT ................................................................................................................................................................................. 35 3.11.1 PFD Output Limit ............................................................................................................................................................................ 35 3.11.2 Frequency Offset Limit .................................................................................................................................................................. 35 3.11.3 PBO (T0 only) ................................................................................................................................................................................. 35 3.11.4 Phase Offset Selection (T0 only) .................................................................................................................................................. 35 3.11.5 Four Paths of T0 / T4 DPLL Outputs ............................................................................................................................................. 35 3.11.5.1 T0 Path ............................................................................................................................................................................. 35 3.11.5.2 T4 Path ............................................................................................................................................................................. 36 T0 / T4 APLL ................................................................................................................................................................................................. 37 OUTPUT CLOCKS & FRAME SYNC SIGNALS ........................................................................................................................................... 37 3.13.1 Output Clocks ................................................................................................................................................................................. 37 3.13.2 Frame SYNC Output Signals ......................................................................................................................................................... 41 MASTER / SLAVE CONFIGURATION ......................................................................................................................................................... 43 INTERRUPT SUMMARY ............................................................................................................................................................................... 44 T0 AND T4 SUMMARY ................................................................................................................................................................................. 44 POWER SUPPLY FILTERING TECHNIQUES ............................................................................................................................................. 45 MASTER / SLAVE APPLICATION ............................................................................................................................................................... 46 4 TYPICAL APPLICATION ................................................................................................................................................. 46 5 MICROPROCESSOR INTERFACE .................................................................................................................................. 47 EPROM MODE .............................................................................................................................................................................................. 48 MULTIPLEXED MODE .................................................................................................................................................................................. 49 INTEL MODE ................................................................................................................................................................................................. 51 MOTOROLA MODE ...................................................................................................................................................................................... 53 SERIAL MODE .............................................................................................................................................................................................. 55 6 JTAG ................................................................................................................................................................................ 57 7 PROGRAMMING INFORMATION .................................................................................................................................... 58 7.1 7.2 REGISTER MAP ............................................................................................................................................................................................ 58 REGISTER DESCRIPTION ........................................................................................................................................................................... 63 7.2.1 Global Control Registers ............................................................................................................................................................... 63 7.2.2 Interrupt Registers ......................................................................................................................................................................... 72 7.2.3 Input Clock Frequency & Priority Configuration Registers ....................................................................................................... 76 7.2.4 Input Clock Quality Monitoring Configuration & Status Registers ........................................................................................... 87 7.2.5 T0 / T4 DPLL Input Clock Selection Registers ............................................................................................................................. 98 7.2.6 T0 / T4 DPLL State Machine Control Registers ......................................................................................................................... 103 7.2.7 T0 / T4 DPLL & APLL Configuration Registers .......................................................................................................................... 105 7.2.8 Output Configuration Registers .................................................................................................................................................. 119 7.2.9 PBO & Phase Offset Control Registers ...................................................................................................................................... 126 7.2.10 Synchronization Configuration Registers ................................................................................................................................. 128 JUNCTION TEMPERATURE ...................................................................................................................................................................... 129 EXAMPLE OF JUNCTION TEMPERATURE CALCULATION ................................................................................................................... 129 8 THERMAL MANAGEMENT ........................................................................................................................................... 129 8.1 8.2 Table of Contents 4 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL 9 ELECTRICAL SPECIFICATIONS .................................................................................................................................. 131 9.1 9.2 9.3 ABSOLUTE MAXIMUM RATING ................................................................................................................................................................ 131 RECOMMENDED OPERATION CONDITIONS .......................................................................................................................................... 131 I/O SPECIFICATIONS ................................................................................................................................................................................. 132 9.3.1 CMOS Input / Output Port ............................................................................................................................................................ 132 9.3.2 PECL / LVDS Input / Output Port ................................................................................................................................................ 133 9.3.2.1 PECL Input / Output Port ................................................................................................................................................ 133 9.3.2.2 LVDS Input / Output Port ................................................................................................................................................ 135 JITTER & WANDER PERFORMANCE ....................................................................................................................................................... 136 OUTPUT WANDER GENERATION ............................................................................................................................................................ 139 INPUT / OUTPUT CLOCK TIMING ............................................................................................................................................................. 140 OUTPUT CLOCK TIMING ........................................................................................................................................................................... 141 8.3 8.4 HEATSINK EVALUATION .......................................................................................................................................................................... 129 TQFP EPAD THERMAL RELEASE PATH ................................................................................................................................................. 130 9.4 9.5 9.6 9.7 PACKAGE DIMENSIONS.................................................................................................................................................... 147 ORDERING INFORMATION................................................................................................................................................ 150 Table of Contents 5 March 23, 2009 List of Tables Table 1: Table 2: Table 3: Table 4: Table 5: Table 6: Table 7: Table 8: Table 9: Table 10: Table 11: Table 12: Table 13: Table 14: Table 15: Table 16: Table 17: Table 18: Table 19: Table 20: Table 21: Table 22: Table 23: Table 24: Table 25: Table 26: Table 27: Table 28: Table 29: Table 30: Table 31: Table 32: Table 33: Table 34: Table 35: Table 36: Table 37: Table 38: Table 39: Table 40: Table 41: Table 42: Table 43: Table 44: Table 45: Table 46: Table 47: Table 48: Pin Description ............................................................................................................................................................................................. 13 Related Bit / Register in Chapter 3.2 ........................................................................................................................................................... 18 Related Bit / Register in Chapter 3.3 ........................................................................................................................................................... 19 Related Bit / Register in Chapter 3.4 ........................................................................................................................................................... 20 Related Bit / Register in Chapter 3.5 ........................................................................................................................................................... 22 Input Clock Selection for T0 Path ................................................................................................................................................................ 23 Input Clock Selection for T4 Path ................................................................................................................................................................ 23 External Fast Selection ................................................................................................................................................................................ 23 Related Bit / Register in Chapter 3.6 ........................................................................................................................................................... 24 Coarse Phase Limit Programming (the selected input clock of 2 kHz, 4 kHz or 8 kHz) .............................................................................. 25 Coarse Phase Limit Programming (the selected input clock of other than 2 kHz, 4 kHz and 8 kHz) .......................................................... 25 Related Bit / Register in Chapter 3.7 ........................................................................................................................................................... 26 Conditions of Qualified Input Clocks Available for T0 & T4 Selection ......................................................................................................... 27 Related Bit / Register in Chapter 3.8 ........................................................................................................................................................... 28 T0 DPLL Operating Mode Control ............................................................................................................................................................... 29 T4 DPLL Operating Mode Control ............................................................................................................................................................... 31 Related Bit / Register in Chapter 3.9 ........................................................................................................................................................... 31 Frequency Offset Control in Temp-Holdover Mode ..................................................................................................................................... 32 Frequency Offset Control in Holdover Mode ............................................................................................................................................... 33 Holdover Frequency Offset Read ................................................................................................................................................................ 33 Related Bit / Register in Chapter 3.10 ......................................................................................................................................................... 34 Related Bit / Register in Chapter 3.11 ......................................................................................................................................................... 36 Related Bit / Register in Chapter 3.12 ......................................................................................................................................................... 37 Outputs on OUT1 ~ OUT5 if Derived from T0/T4 DPLL Outputs ................................................................................................................ 37 Outputs on OUT1 ~ OUT5 if Derived from T0 APLL ................................................................................................................................... 38 Outputs on OUT2 ~ OUT4 if Derived from T4 APLL ................................................................................................................................... 39 Outputs on OUT1 & OUT5 if Derived from T4 APLL ................................................................................................................................... 40 Synchronization Control ............................................................................................................................................................................... 41 Related Bit / Register in Chapter 3.13 ......................................................................................................................................................... 42 Device Master / Slave Control ..................................................................................................................................................................... 43 Related Bit / Register in Chapter 3.15 ......................................................................................................................................................... 44 Microprocessor Interface ............................................................................................................................................................................. 47 Access Timing Characteristics in EPROM Mode ......................................................................................................................................... 48 Read Timing Characteristics in Multiplexed Mode ....................................................................................................................................... 49 Write Timing Characteristics in Multiplexed Mode ....................................................................................................................................... 50 Read Timing Characteristics in Intel Mode .................................................................................................................................................. 51 Write Timing Characteristics in Intel Mode .................................................................................................................................................. 52 Read Timing Characteristics in Motorola Mode ........................................................................................................................................... 53 Write Timing Characteristics in Motorola Mode ........................................................................................................................................... 54 Read Timing Characteristics in Serial Mode ................................................................................................................................................ 55 Write Timing Characteristics in Serial Mode ................................................................................................................................................ 56 JTAG Timing Characteristics ....................................................................................................................................................................... 57 Register List and Map .................................................................................................................................................................................. 58 Power Consumption and Maximum Junction Temperature ....................................................................................................................... 129 Thermal Data ............................................................................................................................................................................................. 129 Absolute Maximum Rating ......................................................................................................................................................................... 131 Recommended Operation Conditions ........................................................................................................................................................ 131 CMOS Input Port Electrical Characteristics ............................................................................................................................................... 132 List of Tables 6 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL Table 49: Table 50: Table 51: Table 52: Table 53: Table 54: Table 55: Table 56: Table 57: Table 58: Table 59: Table 60: Table 61: Table 62: Table 63: CMOS Input Port with Internal Pull-Up Resistor Electrical Characteristics ................................................................................................ CMOS Input Port with Internal Pull-Down Resistor Electrical Characteristics ........................................................................................... CMOS Output Port Electrical Characteristics ............................................................................................................................................ PECL Input / Output Port Electrical Characteristics ................................................................................................................................... LVDS Input / Output Port Electrical Characteristics ................................................................................................................................... Output Clock Jitter Generation .................................................................................................................................................................. Output Clock Phase Noise ......................................................................................................................................................................... Input Jitter Tolerance (155.52 MHz) .......................................................................................................................................................... Input Jitter Tolerance (1.544 MHz) ............................................................................................................................................................ Input Jitter Tolerance (2.048 MHz) ............................................................................................................................................................ Input Jitter Tolerance (8 kHz) .................................................................................................................................................................... T0 DPLL Jitter Transfer & Damping Factor ............................................................................................................................................... T4 DPLL Jitter Transfer & Damping Factor ............................................................................................................................................... Input/Output Clock Timing 3 ...................................................................................................................................................................... Output Clock Timing .................................................................................................................................................................................. 132 132 132 134 135 136 137 137 137 137 137 138 138 140 142 List of Tables 7 March 23, 2009 List of Figures Figure 1. Functional Block Diagram ............................................................................................................................................................................ 11 Figure 2. Pin Assignment (Top View) .......................................................................................................................................................................... 12 Figure 3. Pre-Divider for An Input Clock ..................................................................................................................................................................... 20 Figure 4. Input Clock Activity Monitoring ..................................................................................................................................................................... 21 Figure 5. External Fast Selection ................................................................................................................................................................................ 23 Figure 6. Qualified Input Clocks for Automatic Selection ............................................................................................................................................ 24 Figure 7. T0 Selected Input Clock vs. DPLL Automatic Operating Mode ................................................................................................................... 30 Figure 8. T4 Selected Input Clock vs. DPLL Automatic Operating Mode ................................................................................................................... 31 Figure 9. On Target Frame Sync Input Signal Timing ................................................................................................................................................. 41 Figure 10. 0.5 UI Early Frame Sync Input Signal Timing ............................................................................................................................................. 41 Figure 11. 0.5 UI Late Frame Sync Input Signal Timing .............................................................................................................................................. 42 Figure 12. 1 UI Late Frame Sync Input Signal Timing ................................................................................................................................................. 42 Figure 13. Physical Connection Between Two Devices .............................................................................................................................................. 43 Figure 14. IDT82V3385 Power Decoupling Scheme ................................................................................................................................................... 45 Figure 15. Typical Application ...................................................................................................................................................................................... 46 Figure 16. EPROM Access Timing Diagram ............................................................................................................................................................... 48 Figure 17. Multiplexed Read Timing Diagram ............................................................................................................................................................. 49 Figure 18. Multiplexed Write Timing Diagram .............................................................................................................................................................. 50 Figure 19. Intel Read Timing Diagram ......................................................................................................................................................................... 51 Figure 20. Intel Write Timing Diagram ......................................................................................................................................................................... 52 Figure 21. Motorola Read Timing Diagram .................................................................................................................................................................. 53 Figure 22. Motorola Write Timing Diagram .................................................................................................................................................................. 54 Figure 23. Serial Read Timing Diagram (CLKE Asserted Low) ................................................................................................................................... 55 Figure 24. Serial Read Timing Diagram (CLKE Asserted High) .................................................................................................................................. 55 Figure 25. Serial Write Timing Diagram ....................................................................................................................................................................... 56 Figure 26. JTAG Interface Timing Diagram ................................................................................................................................................................. 57 Figure 27. Assembly for Expose Pad thermal Release Path (Side View) ................................................................................................................. 130 Figure 28. Recommended PECL Input Port Line Termination .................................................................................................................................. 133 Figure 29. Recommended PECL Output Port Line Termination ................................................................................................................................ 133 Figure 30. Recommended LVDS Input Port Line Termination .................................................................................................................................. 135 Figure 31. Recommended LVDS Output Port Line Termination ................................................................................................................................ 135 Figure 32. Output Wander Generation ...................................................................................................................................................................... 139 Figure 33. Input / Output Clock Timing ...................................................................................................................................................................... 140 Figure 34. 100-Pin EQG Package Dimensions (a) (in Millimeters) ............................................................................................................................ 147 Figure 35. 100-Pin EQG Package Dimensions (b) (in Millimeters) ............................................................................................................................ 148 Figure 36. EQG100 Recommended Land Pattern with Exposed Pad (in Millimeters) .............................................................................................. 149 List of Figures 8 March 23, 2009 SYNCHRONOUS ETHERNET WAN PLL FEATURES HIGHLIGHTS * The first single PLL chip: * Features 0.5 mHz to 560 Hz bandwidth * Provides node clock for ITU-T G.8261/G.8262 Synchronous Ethernet * Exceeds GR-253-CORE (OC-12) and ITU-T G.813 (STM-16/ Option I) jitter generation requirements * Provides node clocks for Cellular and WLL base-station (GSM and 3G networks) * Provides clocks for DSL access concentrators (DSLAM), especially for Japan TCM-ISDN network timing based ADSL equipments Provides an integrated single-chip solution for Synchronous Equipment Timing Source, including Stratum 2, 3E, 3, SMC, 4E and 4 clocks Employs DPLL and APLL to feature excellent jitter performance and minimize the number of the external components Integrates T0 DPLL and T4 DPLL; T4 DPLL locks independently or locks to T0 DPLL Supports Forced or Automatic operating mode switch controlled by an internal state machine; the primary operating modes are FreeRun, Locked and Holdover Supports programmable DPLL bandwidth (0.5 mHz to 560 Hz in 19 steps) and damping factor (1.2 to 20 in 5 steps) Supports 1.1X10-5 ppm absolute holdover accuracy and 4.4X10-8 ppm instantaneous holdover accuracy Supports PBO to minimize phase transients on T0 DPLL output to be no more than 0.61 ns Supports phase absorption when phase-time changes on T0 selected input clock are greater than a programmable limit over an interval of less than 0.1 seconds Supports programmable input-to-output phase offset adjustment Limits the phase and frequency offset of the outputs Supports manual and automatic selected input clock switch * * * * * * * * * * IDT82V3385 MAIN FEATURES * * * * * * * * * * * Supports automatic hitless selected input clock switch on clock failure Supports three types of input clock sources: recovered clock from STM-N or OC-n, PDH network synchronization timing and external synchronization reference timing Provides a 2 kHz, 4 kHz or 8 kHz frame sync input signal, and a 2 kHz and an 8 kHz frame sync output signals Provides 5 input clocks whose frequency cover from 2 kHz to 622.08 MHz Provides 5 output clocks whose frequency cover from 1 Hz to 622.08 MHz Provides output clocks for BITS, GPS, 3G, GSM, etc. Supports PECL/LVDS and CMOS input/output technologies Supports master clock calibration Supports Master/Slave application (two chips used together) to enable system protection against single chip failure Meets Telcordia GR-1244-CORE, GR-253-CORE, GR-1377CORE, ITU-T G.812, ITU-T G.813 and ITU-T G.783 criteria Multiple microprocessor interface modes: EPROM, Multiplexed, Intel, Motorola and Serial IEEE 1149.1 JTAG Boundary Scan Single 3.3 V operation with 5 V tolerant CMOS I/Os 100-pin TQFP package, Green package options available BITS / SSU SMC / SEC (SONET / SDH) DWDM cross-connect and transmission equipments Synchronous Ethernet equipments Central Office Timing Source and Distribution Core and access IP switches / routers Gigabit and Terabit IP switches / routers IP and ATM core switches and access equipments Cellular and WLL base-station node clocks Broadband and multi-service access equipments Any other telecom equipments that need synchronous equipment system timing OTHER FEATURES * * * * * * * * * * * * * * * APPLICATIONS IDT and the IDT logo are trademarks of Integrated Device Technology, Inc. 9 2009 Integrated Device Technology, Inc. March 23, 2009 DSC-7211/2 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL DESCRIPTION The IDT82V3385 is an integrated, single-chip solution for the Synchronous Equipment Timing Source for Stratum 2, 3E, 3, SMC, 4E and 4 clocks in SONET / SDH equipments, DWDM and Wireless base station, such as GSM, 3G, DSL concentrator, Router and Access Network applications. The device supports three types of input clock sources: recovered clock from STM-N or OC-n, PDH network synchronization timing and external synchronization reference timing. Based on ITU-T G.783 and Telcordia GR-253-CORE, the device consists of T0 and T4 paths. The T0 path is a high quality and highly configurable path to provide system clock for node timing synchronization within a SONET / SDH network. The T4 path is simpler and less configurable for equipment synchronization. The T4 path locks independently from the T0 path or locks to the T0 path. An input clock is automatically or manually selected for T0 and T4 each for DPLL locking. Both the T0 and T4 paths support three primary operating modes: Free-Run, Locked and Holdover. In Free-Run mode, the DPLL refers to the master clock. In Locked mode, the DPLL locks to the selected input clock. In Holdover mode, the DPLL resorts to the fre- quency data acquired in Locked mode. Whatever the operating mode is, the DPLL gives a stable performance without being affected by operating conditions or silicon process variations. If the DPLL outputs are processed by T0/T4 APLL, the outputs of the device will be in a better jitter/wander performance. The device provides programmable DPLL bandwidths: 0.5 mHz to 560 Hz in 19 steps and damping factors: 1.2 to 20 in 5 steps. Different settings cover all SONET / SDH clock synchronization requirements. A high stable input is required for the master clock in different applications. The master clock is used as a reference clock for all the internal circuits in the device. It can be calibrated within 741 ppm. All the read/write registers are accessed through a microprocessor interface. The device supports five microprocessor interface modes: EPROM, Multiplexed, Intel, Motorola and Serial. In general, the device can be used in Master/Slave application. In this application, two devices should be used together to enable system protection against single chip failure. See Chapter 4 Typical Application for details. Description 10 March 23, 2009 IDT82V3385 Functional Block Diagram T4 DPLL 77.76 MHz GSM/GPS/16E1/16T1 10 T4 Input Selector MUX T4 PFD & LPF 16E1/16T1 OUT1 MUX Divider OUT1 (ETH + nonETH) Divider 12E1/24T1/E3/T3 10 OUT2 MUX Divider OUT2 (nonETH) Input nonETH 10 Priority Priority Priority Priority Priority 16E1/16T1/OBSAI OUT3 MUX Divider FUNCTIONAL BLOCK DIAGRAM OUT3 (nonETH) IN1 T0 77.76 MHz Monitors T0 8 kHz 8 k Divider ETH + nonETH 77.76 MHz T4 APLL Input Pre-Divider IN2 Input Pre-Divider T4 APLL MUX IN3 Input Pre-Divider IN4 Input Pre-Divider 10 IN5 Selection Input Pre-Divider OUT4 MUX Divider OUT4_POS (nonETH) OUT4_NEG (nonETH) Figure 1. Functional Block Diagram 11 ETH/OBSAI/16E1/16T1 EX_SYNC1 T0 APLL MUX 16E1/16T1/OBSAI PBO Phase Offset T0 Input Selector T0 PFD & LPF 12E1/24T1/E3/T3 16E1/16T1 T0 APLL 10 OUT5 MUX Divider OUT5_POS (ETH + nonETH) OUT5_NEG (ETH + nonETH) Auto Divider Divider Auto Divider FRSYNC_8K MFRSYNC_2K T0 DPLL Output APLL Microprocessor Interface JTAG SYNCHRONOUS ETHERNET WAN PLL March 23, 2009 OSCI Note: Configuration of OUTn (n = 1~5) ETH MUX please refer to Table 24-27. IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL 1 PIN ASSIGNMENT SONET/SDH MS/SL AD0/SDO VDDD6 DGND6 DGND7 VDDD7 AGND3 VDDA3 OUT1 OUT3 OUT2 AD1 AD2 AD3 AD4 AD5 AD6 78 77 99 98 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81 80 79 100 76 75 74 73 72 71 70 69 68 67 66 AD7 IC7 IC6 IC5 NC NC NC AGND TRST IC1 IC2 AGND1 VDDA1 TMS INT_REQ TCK OSCI DGND1 VDDD1 VDDD3 DGND3 DGND2 VDDD2 IC3 FF_SRCSW VDDA2 AGND2 TDO IC4 TDI NC NC 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 42 43 44 45 46 47 48 49 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 IDT82V3385 65 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 RDY RST ALE/SCLK RD WR CS A0/SDI A1/CLKE A2 A3 A4 A5 A6 DGND5 VDDD5 MPU_MODE0 MPU_MODE1 MPU_MODE2 NC NC NC IN5 NC NC NC NC DGND8 GND_DIFF1 VDD_DIFF1 OUT5_NEG GND_DIFF2 IN4_NEG NC EX_SYNC1 NC DGND4 VDDD8 NC VDD_DIFF2 IN3_POS OUT4_POS OUT4_NEG FRSYNC_8K MFRSYNC_2K Figure 2. Pin Assignment (Top View) Pin Assignment OUT5_POS 12 IN3_NEG IN4_POS VDDD4 IN1 IN2 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL 2 Name PIN DESCRIPTION Pin No. I/O Type Global Control Signal OSCI 10 I CMOS OSCI: Crystal Oscillator Master Clock A nominal 12.8000 MHz clock provided by a crystal oscillator is input on this pin. It is the master clock for the device. FF_SRCSW: External Fast Selection Enable During reset, this pin determines the default value of the EXT_SW bit (b4, 0BH) 2. The EXT_SW bit determines whether the External Fast Selection is enabled. High: The default value of the EXT_SW bit (b4, 0BH) is `1' (External Fast selection is enabled); Low: The default value of the EXT_SW bit (b4, 0BH) is `0' (External Fast selection is disabled). After reset, this pin selects an input clock pair for the T0 DPLL if the External Fast selection is enabled: High: Pair IN1 / IN3 is selected. Low: Pair IN2/ IN4 is selected. After reset, the input on this pin takes no effect if the External Fast selection is disabled. MS/SL: Master / Slave Selection This pin, together with the MS_SL_CTRL bit (b0, 13H), controls whether the device is configured as the Master or as the Slave. Refer to Chapter 3.14 Master / Slave Configuration for details. The signal level on this pin is reflected by the MASTER_SLAVE bit (b1, 09H). SONET/SDH: SONET / SDH Frequency Selection During reset, this pin determines the default value of the IN_SONET_SDH bit (b2, 09H): High: The default value of the IN_SONET_SDH bit is `1' (SONET); Low: The default value of the IN_SONET_SDH bit is `0' (SDH). After reset, the value on this pin takes no effect. RST: Reset A low pulse of at least 50 s on this pin resets the device. After this pin is high, the device will still be held in reset state for 500 ms (typical). EX_SYNC1: External Sync Input 1 A 2 kHz, 4 kHz or 8 kHz signal is input on this pin. Input Clock IN1 46 IN1: Input Clock 1 I A N x 2 kHz, N x 4 kHz, N x 8 kHz 3, 1.544 MHz (SONET) / 2.048 MHz (SDH), 6.48 MHz, CMOS pull-down 19.44 MHz, 25.92 MHz, 38.88 MHz, 51.84 MHz, 77.76 MHz or 155.52 MHz clock is input on this pin. IN2: Input Clock 2 I A N x 2 kHz, N x 4 kHz, N x 8 kHz 3, 1.544 MHz (SONET) / 2.048 MHz (SDH), 6.48 MHz, CMOS pull-down 19.44 MHz, 25.92 MHz, 38.88 MHz, 51.84 MHz, 77.76 MHz or 155.52 MHz clock is input on this pin. IN3_POS / IN3_NEG: Positive / Negative Input Clock 3 A N x 2 kHz, N x 4 kHz, N x 8 kHz 3, 1.544 MHz (SONET) / 2.048 MHz (SDH), 6.48 MHz, I PECL/LVDS 19.44 MHz, 25.92 MHz, 38.88 MHz, 51.84 MHz, 77.76 MHz, 155.52 MHz, 156.25 MHz, 311.04 MHz or 622.08 MHz clock is differentially input on this pair of pins. Whether the clock signal is PECL or LVDS is automatically detected. Description 1 Table 1: Pin Description FF_SRCSW 18 I pull-down CMOS MS/SL 99 I pull-up CMOS SONET/SDH 100 I pull-down CMOS RST 74 I pull-up CMOS Frame Synchronization Input Signal EX_SYNC1 45 I pull-down CMOS IN2 47 IN3_POS IN3_NEG 40 41 Pin Description 13 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL Table 1: Pin Description (Continued) Name IN4_POS IN4_NEG Pin No. 42 43 I/O Type Description 1 IN5 54 IN4_POS / IN4_NEG: Positive / Negative Input Clock 4 A N x 2 kHz, N x 4 kHz, N x 8 kHz 3, 1.544 MHz (SONET) / 2.048 MHz (SDH), 6.48 MHz, I PECL/LVDS 19.44 MHz, 25.92 MHz, 38.88 MHz, 51.84 MHz, 77.76 MHz, 155.52 MHz, 156.25 MHz, 311.04 MHz or 622.08 MHz clock is differentially input on this pair of pins. Whether the clock signal is PECL or LVDS is automatically detected. IN5: Input Clock 5 A N x 2 kHz, N x 4 kHz, N x 8 kHz 3, 1.544 MHz (SONET) / 2.048 MHz (SDH), 6.48 MHz, I 19.44 MHz, 25.92 MHz, 38.88 MHz, 51.84 MHz, 77.76 MHz or 155.52 MHz clock is input on CMOS pull-down this pin. In Slave operation, the frequency of the T0 selected input clock IN5 is recommended to be 6.48 MHz. Output Frame Synchronization Signal FRSYNC_8K: 8 kHz Frame Sync Output An 8 kHz signal is output on this pin. MFRSYNC_2K: 2 kHz Multiframe Sync Output A 2 kHz signal is output on this pin. Output Clock OUT1: Output Clock 1 A 1 Hz, 400 Hz, 2 kHz, 8 kHz, 64 kHz, N x E1 4, N x T1 5, N x 13.0 MHz 6, N x 3.84 MHz 7, CMOS 5 MHz, 10 MHz, 20 MHz, 25 MHz, E3, T3, 6.48 MHz, 19.44 MHz, 25.92 MHz, 38.88 MHz, 51.84 MHz, 77.76 MHz, 125 MHz, 155.52 MHz, 156.25 MHz or 312.5 MHz clock is output on this pin. OUT2: Output Clock 2 A 1 Hz, 400 Hz, 2 kHz, 8 kHz, 64 kHz, N x E1 4, N x T1 5, N x 13.0 MHz 6, N x 3.84 MHz 7, CMOS 5 MHz, 10 MHz, 20 MHz, E3, T3, 6.48 MHz, 19.44 MHz, 25.92 MHz, 38.88 MHz, 51.84 MHz, 77.76 MHz or 155.52 MHz clock is output on this pin. OUT3: Output Clock 3 A 1 Hz, 400 Hz, 2 kHz, 8 kHz, 64 kHz, N x E1 4, N x T1 5, N x 13.0 MHz 6, N x 3.84 MHz 7, CMOS 5 MHz, 10 MHz, 20 MHz, E3, T3, 6.48 MHz, 19.44 MHz, 25.92 MHz, 38.88 MHz, 51.84 MHz, 77.76 MHz or 155.52 MHz clock is output on this pin. OUT4_POS / OUT4_NEG: Positive / Negative Output Clock 4 A 1 Hz, 400 Hz, 2 kHz, 8 kHz, 64 kHz, N x E1 4, N x T1 5, N x 13.0 MHz 6, N x 3.84 MHz 7, PECL/LVDS 5 MHz, 10 MHz, 20 MHz, E3, T3, 6.48 MHz, 19.44 MHz, 25.92 MHz, 38.88 MHz, 51.84 MHz, 77.76 MHz, 155.52 MHz, 311.04 MHz or 622.08 MHz clock is differentially output on this pair of pins. OUT5_POS / OUT5_NEG: Positive / Negative Output Clock 5 A 1 Hz, 400 Hz, 2 kHz, 8 kHz, 64 kHz, N x E1 4, N x T1 5, N x 13.0 MHz 6, N x 3.84 MHz 7, PECL/LVDS 5 MHz, 10 MHz, 20 MHz, 25 MHz, E3, T3, 6.48 MHz, 19.44 MHz, 25.92 MHz, 38.88 MHz, 51.84 MHz, 77.76 MHz, 125 MHz, 155.52 MHz, 311.04 MHz, 312.5 MHz or 622.08 MHz clock is differentially output on this pair of pins. Microprocessor Interface CS: Chip Selection A transition from high to low must occur on this pin for each read or write operation and this pin should remain low until the operation is over. INT_REQ: Interrupt Request This pin is used as an interrupt request. The output characteristics are determined by the HZ_EN bit (b1, 0CH) and the INT_POL bit (b0, 0CH). FRSYNC_8K MFRSYNC_2K 30 31 O O CMOS CMOS OUT1 90 O OUT2 93 O OUT3 94 O OUT4_POS OUT4_NEG 34 O 35 OUT5_POS OUT5_NEG 36 O 37 CS 70 I pull-up O CMOS INT_REQ 8 CMOS Pin Description 14 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL Table 1: Pin Description (Continued) Name Pin No. I/O Type Description 1 MPU_MODE[2:0]: Microprocessor Interface Mode Selection The device supports five microprocessor interface modes: EPROM, Multiplexed, Intel, Motorola and Serial. During reset, these pins determine the default value of the MPU_SEL_CNFG[2:0] bits (b2~0, 7FH) as follows: 001 (EPROM mode); 010 (Multiplexed mode); 011 (Intel mode); 100 (Motorola mode); 101 (Serial mode); 110 - 111 (Reserved). After reset, these pins are general purpose inputs. The microprocessor interface mode is selected by the MPU_SEL_CNFG[2:0] bits (b2~0, 7FH). The value of these pins is always reflected by the MPU_PIN_STS[2:0] bits (b2~0, 02H). A[6:0]: Address Bus In ERPOM, Intel and Motorola modes, these pins are the address bus of the microprocessor interface. SDI: Serial Data Input In Serial mode, this pin is used as the serial data input. Address and data on this pin are serially clocked into the device on the rising edge of SCLK. CMOS CLKE: SCLK Active Edge Selection In Serial mode, this pin selects the active edge of SCLK to update the SDO: High - The falling edge; Low - The rising edge. In Multiplexed mode, A0/SDI, A1/CLKE and A[6:2] pins should be connected to ground. In Serial mode, A[6:2] pins should be connected to ground. AD[7:0]: Address / Data Bus In EPROM, Intel and Motorola modes, these pins are the bi-directional data bus of the microprocessor interface. In Multiplexed mode, these pins are the bi-directional address/data bus of the microprocessor interface. I/O pull-down SDO: Serial Data Output In Serial mode, this pin is used as the serial data output. Data on this pin is serially clocked out of the device on the active edge of SCLK. In Serial mode, AD[7:1] pins should be connected to ground. MPU_MODE0 MPU_MODE1 MPU_MODE2 60 59 58 I pull-down CMOS A0 / SDI A1 / CLKE A2 A3 A4 A5 A6 AD0 / SDO AD1 AD2 AD3 AD4 AD5 AD6 AD7 69 68 67 66 65 64 63 83 82 81 80 79 78 77 76 I pull-up I pull-down CMOS WR 71 CMOS WR: Write Operation In Multiplexed and Intel modes, this pin is asserted low to initiate a write operation. In Motorola mode, this pin is asserted low to initiate a write operation or s asserted high to initiate a read operation. In EPROM and Serial modes, this pin should be connected to ground. RD: Read Operation In Multiplexed and Intel modes, this pin is asserted low to initiate a read operation. In EPROM, Motorola and Serial modes, this pin should be connected to ground. RD 72 I pull-up CMOS Pin Description 15 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL Table 1: Pin Description (Continued) Name Pin No. I/O Type Description 1 ALE: Address Latch Enable In Multiplexed mode, the address on AD[7:0] pins is sampled into the device on the falling edge of ALE. ALE / SCLK 73 I pull-down CMOS SCLK: Shift Clock In Serial mode, a shift clock is input on this pin. Data on SDI is sampled by the device on the rising edge of SCLK. Data on SDO is updated on the active edge of SCLK. The active edge is determined by the CLKE. In EPROM, Intel and Motorola modes, this pin should be connected to ground. RDY: Ready/Data Acknowledge In Multiplexed and Intel modes, a high level on this pin indicates that a read/write cycle is completed. A low level on this pin indicates that wait state must be inserted. In Motorola mode, a low level on this pin indicates that valid information on the data bus is ready for a read operation or acknowledges the acceptance of the written data during a write operation. In EPROM and Serial modes, this pin should be connected to ground. JTAG (per IEEE 1149.1) TRST 2 I pull-down I pull-up CMOS TRST: JTAG Test Reset (Active Low) A low signal on this pin resets the JTAG test port. This pin should be connected to ground when JTAG is not used. TMS: JTAG Test Mode Select The signal on this pin controls the JTAG test performance and is sampled on the rising edge of TCK. TCK: JTAG Test Clock The clock for the JTAG test is input on this pin. TDI and TMS are sampled on the rising edge of TCK and TDO is updated on the falling edge of TCK. If TCK is idle at a low level, all stored-state devices contained in the test logic will indefinitely retain their state. TDI: JTAG Test Data Input The test data is input on this pin. It is clocked into the device on the rising edge of TCK. TDO: JTAG Test Data Output The test data is output on this pin. It is clocked out of the device on the falling edge of TCK. TDO pin outputs a high impedance signal except during the process of data scanning. This pin can indicate the interrupt of T0 selected input clock fail, as determined by the LOS_FLAG_ON_TDO bit (b6, 0BH). Refer to Chapter 3.8.1 Input Clock Validity for details. Power & Ground VDDD1 VDDD2 VDDD3 VDDD4 VDDD5 VDDD6 VDDD7 12 16 13 50 61 85 86 Power VDDDn: 3.3 V Digital Power Supply VDDDn connections should be connected using the recommended decoupling scheme shown in Figure 14. RDY 75 O CMOS TMS 7 CMOS TCK 9 I pull-down I pull-up CMOS TDI 23 CMOS TDO 21 O CMOS Pin Description 16 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL Table 1: Pin Description (Continued) Name VDDA1 VDDA2 VDDA3 VDDD8 VDD_DIFF1 VDD_DIFF2 DGND1 DGND2 DGND3 DGND4 DGND5 DGND6 DGND7 AGND1 AGND2 AGND3 GND_DIFF1 GND_DIFF2 DGND8 AGND IC1 IC2 IC3 IC4 IC5 IC6 IC7 NC Pin No. 6 19 91 26 33 39 11 15 14 49 62 84 87 5 20 92 32 38 29 1 3 4 17 22 96 97 98 24, 25, 27, 28, 44, 48, 51, 52, 53, 55, 56, 57, 88, 89, 95 Ground Ground Power I/O Type Description 1 VDDAn: 3.3 V Analog Power Supply VDDAn connections should be connected using the recommended decoupling scheme shown in Figure 14. Power Power Power - VDDD8: 3.3 V Digital Power Supply VDD_DIFF1: 3.3 V Power Supply for OUT4 VDD_DIFF2: 3.3 V Power Supply for OUT5 DGNDn: Digital Ground AGNDn: Analog Ground Ground Ground Ground Ground - GND_DIFF: Ground for OUT4 GND_DIFF: Ground for OUT5 DGND8: Digital Ground AGND: Analog Ground Others IC: Internally Connected Internal Use. These pins should be left open for normal operation. NC: Not Connected - Note: 1. All the unused input pins should be connected to ground; the output of all the unused output pins are don't-care. 2. The contents in the brackets indicate the position of the register bit/bits. 3. N x 8 kHz: 1 < N < 19440. 4. N x E1: N = 1, 2, 3, 4, 6, 8, 12, 16, 24, 32, 48, 64. 5. N x T1: N = 1, 2, 3, 4, 6, 8, 12, 16, 24, 32, 48, 64, 96. 6. N x 13.0 MHz: N = 1, 2, 4. 7. N x 3.84 MHz: N = 1, 2, 4, 8, 16, 10, 20, 40. Pin Description 17 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL 3 3.1 FUNCTIONAL DESCRIPTION RESET 3.2 MASTER CLOCK The reset operation resets all registers and state machines to their default value or status. After power on, the device must be reset for normal operation. For a complete reset, the RST pin must be asserted low for at least 50 s. After the RST pin is pulled high, the device will still be in reset state for 500 ms (typical). If the RST pin is held low continuously, the device remains in reset state. A nominal 12.8000 MHz clock, provided by a crystal oscillator, is input on the OSCI pin. This clock is provided for the device as a master clock. The master clock is used as a reference clock for all the internal circuits. A better active edge of the master clock is selected by the OSC_EDGE bit to improve jitter and wander performance. In fact, an offset from the nominal frequency may input on the OSCI pin. This offset can be compensated by setting the NOMINAL_FREQ_VALUE[23:0] bits. The calibration range is within 741 ppm. The performance of the master clock should meet GR-1244-CORE, GR-253-CORE, ITU-T G.812 and G.813 criteria. Table 2: Related Bit / Register in Chapter 3.2 Bit NOMINAL_FREQ_VALUE[23:0] OSC_EDGE Register NOMINAL_FREQ[23:16]_CNFG, NOMINAL_FREQ[15:8]_CNFG, NOMINAL_FREQ[7:0]_CNFG DIFFERENTIAL_IN_OUT_OSCI_CNFG Address (Hex) 06, 05, 04 0A Functional Description 18 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL 3.3 3.3.1 INPUT CLOCKS & FRAME SYNC SIGNAL INPUT CLOCKS Altogether 5 clocks and 1 frame sync signal are input to the device. The device provides 5 input clock ports. According to the input port technology, the input ports support the following technologies: * PECL/LVDS * CMOS According to the input clock source, the following clock sources are supported: * T1: Recovered clock from STM-N or OC-n * T2: PDH network synchronization timing * T3: External synchronization reference timing IN1, IN2 and IN5 support CMOS input signal only and the clock sources can be from T1, T2 or T3. IN3 and IN4 support PECL/LVDS input signal only and automatically detect whether the signal is PECL or LVDS. The clock sources can be from T1, T2 or T3. For SDH and SONET networks, the default frequency is different. SONET / SDH frequency selection is controlled by the IN_SONET_SDH bit. During reset, the default value of the IN_SONET_SDH bit is determined by the SONET/SDH pin: high for SONET and low for SDH. After reset, the input signal on the SONET/SDH pin takes no effect. 3.3.2 FRAME SYNC INPUT SIGNALS A 2 kHz, 4 kHz or 8 kHz frame sync signal is input on the EX_SYNC1 pin. It is a CMOS input. The input frequency should match the setting in the SYNC_FREQ[1:0] bits. The frame sync input signal is used for frame sync output signal synchronization. Refer to Chapter 3.13.2 Frame SYNC Output Signals for details. Table 3: Related Bit / Register in Chapter 3.3 Bit IN_SONET_SDH SYNC_FREQ[1:0] Register INPUT_MODE_CNFG Address (Hex) 09 Functional Description 19 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL 3.4 INPUT CLOCK PRE-DIVIDER Each input clock is assigned an internal Pre-Divider. The Pre-Divider is used to divide the clock frequency down to the DPLL required frequency, which is no more than 38.88 MHz. For IN1 ~ IN5, the DPLL required frequency is set by the corresponding IN_FREQ[3:0] bits. If the input clock is of 2 kHz, 4 kHz or 8 kHz, the Pre-Divider is bypassed automatically and the corresponding IN_FREQ[3:0] bits should be set to match the input frequency; the input clock can be inverted, as determined by the IN_2K_4K_8K_INV bit. Each Pre-Divider consists of a HF (High Frequency) Divider (only available for IN3 and IN4), a DivN Divider and a Lock 8k Divider, as shown in Figure 3. The HF Divider, which is only available for IN3 and IN4, should be used when the input clock is higher than (>) 155.52 MHz. The input clock can be divided by 4, 5 or can bypass the HF Divider, as determined by the IN3_DIV[1:0]/IN4_DIV[1:0] bits correspondingly. Either the DivN Divider or the Lock 8k Divider can be used or both can be bypassed, as determined by the DIRECT_DIV bit and the LOCK_8K bit. When the DivN Divider is used for INn (1 n 5), the division factor setting should observe the following order: 1. Select an input clock by the PRE_DIV_CH_VALUE[3:0] bits; 2. Write the lower eight bits of the division factor to the PRE_DIVN_VALUE[7:0] bits; 3. Write the higher eight bits of the division factor to the PRE_DIVN_VALUE[14:8] bits. Pre-Divider IN3_DIV[1:0] bits / IN4_DIV[1:0] bits Input Clock INn (1 n 5) HF Divider (for IN3 & IN4 only) Once the division factor is set for the input clock selected by the PRE_DIV_CH_VALUE[3:0] bits, it is valid until a different division factor is set for the same input clock. The division factor is calculated as follows: Division Factor = (the frequency of the clock input to the DivN Divider / the frequency of the DPLL required clock set by the IN_FREQ[3:0] bits) - 1 The DivN Divider can only divide the input clock whose frequency is lower than (<) 155.52 MHz. When the Lock 8k Divider is used, the input clock is divided down to 8 kHz automatically. The Pre-Divider configuration and the division factor setting depend on the input clock on one of the IN1 ~ IN5 pins and the DPLL required clock. Here is an example: The input clock on the IN4 pin is 622.08 MHz; the DPLL required clock is 6.48 MHz by programming the IN_FREQ[3:0] bits of register IN4 to `0010'. Do the following step by step to divide the input clock: 1. Use the HF Divider to divide the clock down to 155.52 MHz: 622.08 / 155.52 = 4, so set the IN4_DIV[1:0] bits to `01'; 2. Use the DivN Divider to divide the clock down to 6.48 MHz: Set the PRE_DIV_CH_VALUE[3:0] bits to `0110'; Set the DIRECT_DIV bit in Register IN4_CNFG to `1' and the LOCK_8K bit in Register IN4_CNFG to `0'; 155.52 / 6.48 = 24; 24 - 1 = 23, so set the PRE_DIVN_VALUE[14:0] bits to `10111'. DIRECT_DIV bit LOCK_8K bit DivN Divider Lock 8k Divider DPLL required clock Figure 3. Pre-Divider for An Input Clock Table 4: Related Bit / Register in Chapter 3.4 Bit IN3_DIV[1:0] IN4_DIV[1:0] IN_FREQ[3:0] IN_2K_4K_8K_INV DIRECT_DIV LOCK_8K PRE_DIV_CH_VALUE[3:0] PRE_DIVN_VALUE[14:0] Register IN3_IN4_HF_DIV_CNFG IN1_CNFG ~ IN5_CNFG FR_MFR_SYNC_CNFG IN1_CNFG ~ IN5_CNFG PRE_DIV_CH_CNFG PRE_DIVN[14:8]_CNFG, PRE_DIVN[7:0]_CNFG Address (Hex) 18 16 ~ 17, 19 ~ 1A, 1F 74 16 ~ 17, 19 ~ 1A, 1F 23 25, 24 Functional Description 20 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL 3.5 INPUT CLOCK QUALITY MONITORING The qualities of all the input clocks are always monitored in the following aspects: * Activity * Frequency Activity and frequency monitoring are conducted on all the input clocks. The qualified clocks are available for T0/T4 DPLL selection. The T0 and T4 selected input clocks have to be monitored further. Refer to Chapter 3.7 Selected Input Clock Monitoring for details. 3.5.1 ACTIVITY MONITORING Activity is monitored by using an internal leaky bucket accumulator, as shown in Figure 4. Each input clock is assigned an internal leaky bucket accumulator. The input clock is monitored for each period of 128 ms and the internal leaky bucket accumulator increases by 1 when an event is detected; it decreases by 1 if no event is detected within the period set by the decay rate. The event is that an input clock drifts outside (>) 500 ppm with respect to the master clock within a 128 ms period. There are four configurations (0 - 3) for a leaky bucket accumulator. The leaky bucket configuration for an input clock is selected by the corresponding BUCKET_SEL[1:0] bits. Each leaky bucket configuration consists of four elements: upper threshold, lower threshold, bucket size and decay rate. The bucket size is the capability of the accumulator. If the number of the accumulated events reaches the bucket size, the accumulator will stop increasing even if further events are detected. The upper threshold is a point above which a no-activity alarm is raised. The lower threshold is a point below which the no-activity alarm is cleared. The decay rate is a certain period during which the accumulator decreases by 1 if no event is detected. The leaky bucket configuration is programmed by one of four groups of register bits: the BUCKET_SIZE_n_DATA[7:0] bits, the UPPER_ THRESHOLD_n_DATA[7:0] bits, the LOWER_THRESHOLD_n_ DATA[7:0] bits and the DECAY_RATE_n_DATA[1:0] bits respectively; `n' is 3. The no-activity alarm status of the input clock is indicated by the INn_NO_ACTIVITY_ALARM bit (1 n 5). The input clock with a no-activity alarm is disqualified for clock selection for T0/T4 DPLL. clock signal with events clock signal with no event Input Clock Decay Rate Leaky Bucket Accumulator Bucket Size Upper Threshold Lower Threshold 0 No-activity Alarm Indication Figure 4. Input Clock Activity Monitoring Functional Description 21 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL 3.5.2 FREQUENCY MONITORING Frequency is monitored by comparing the input clock with a reference clock. The reference clock can be derived from the master clock or the output of T0 DPLL, as determined by the FREQ_MON_CLK bit. A frequency hard alarm threshold is set for frequency monitoring. If the FREQ_MON_HARD_EN bit is `1', a frequency hard alarm is raised when the frequency of the input clock with respect to the reference clock is above the threshold; the alarm is cleared when the frequency is below the threshold. The frequency hard alarm threshold can be calculated as follows: Frequency Hard Alarm Threshold (ppm) = (ALL_FREQ_HARD_ THRESHOLD[3:0] + 1) X FREQ_MON_FACTOR[3:0] The input clock with a frequency hard alarm is disqualified for clock selection for T0/T4 DPLL. In addition, if the input clock is 2 kHz, 4 kHz or 8 kHz, its clock edges with respect to the reference clock are monitored. If any edge drifts outside 5%, the input clock is disqualified for clock selection for T0/T4 DPLL. The input clock is qualified if any edge drifts inside 5%. This function is supported only when the IN_NOISE_WINDOW bit is `1'. The frequency of each input clock with respect to the reference clock can be read by doing the following step by step: 1. Select an input clock by setting the IN_FREQ_READ_CH[3:0] bits; 2. Read the value in the IN_FREQ_VALUE[7:0] bits and calculate as follows: Input Clock Frequency (ppm) = IN_FREQ_VALUE[7:0] X FREQ_MON_FACTOR[3:0] If the FREQ_MON_HARD_EN bit is `1', the frequency hard alarm status of the input clock is indicated by the INn_FREQ_HARD_ALARM bit (1 n 5). When the FREQ_MON_HARD_EN bit is `0', no frequency hard alarm is raised even if the input clock is above the frequency hard alarm threshold. Table 5: Related Bit / Register in Chapter 3.5 Bit BUCKET_SIZE_n_DATA[7:0] (n = 3) UPPER_THRESHOLD_n_DATA[7:0] (n = 3) LOWER_THRESHOLD_n_DATA[7:0] (n = 3) DECAY_RATE_n_DATA[1:0] (n = 3) BUCKET_SEL[1:0] INn_NO_ACTIVITY_ALARM (1 n 5) INn_FREQ_HARD_ALARM (1 n 5) FREQ_MON_CLK FREQ_MON_HARD_EN ALL_FREQ_HARD_THRESHOLD[3:0] FREQ_MON_FACTOR[3:0] IN_NOISE_WINDOW IN_FREQ_READ_CH[3:0] IN_FREQ_VALUE[7:0] Note that the value set by the FREQ_MON_FACTOR[3:0] bits depends on the application. Register BUCKET_SIZE_3_CNFG UPPER_THRESHOLD_3_CNFG LOWER_THRESHOLD_3_CNFG DECAY_RATE_3_CNFG IN1_CNFG ~ IN5_CNFG IN1_IN2_STS, IN3_IN4_STS, IN5_STS MON_SW_PBO_CNFG ALL_FREQ_MON_THRESHOLD_CNFG FREQ_MON_FACTOR_CNFG PHASE_MON_PBO_CNFG IN_FREQ_READ_CH_CNFG IN_FREQ_READ_STS Address (Hex) 3F 3D 3E 40 16 ~ 17, 19 ~ 1A, 1F 44~ 45, 48 0B 2F 2E 78 41 42 Functional Description 22 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL 3.6 T0 / T4 DPLL INPUT CLOCK SELECTION An input clock is selected for T0 DPLL and for T4 DPLL respectively. For T0 path, the EXT_SW bit and the T0_INPUT_SEL[3:0] bits determine the input clock selection, as shown in Table 6: Table 6: Input Clock Selection for T0 Path Control Bits EXT_SW 1 0 T0_INPUT_SEL[3:0] don't-care other than 0000 0000 Input Clock Selection External Fast selection Forced selection Automatic selection Automatic selection is done based on the results of input clocks quality monitoring and the related registers configuration. The selected input clock is attempted to be locked in T0/T4 DPLL. 3.6.1 EXTERNAL FAST SELECTION (T0 ONLY) The External Fast selection is supported by T0 path only. In External Fast selection, only IN1/IN3 and IN2/IN4 pairs are available for selection. Refer to Figure 5. The results of input clocks quality monitoring (refer to Chapter 3.5 Input Clock Quality Monitoring) do not affect input clock selection. The T0 input clock selection is determined by the FF_SRCSW pin after reset (this pin determines the default value of the EXT_SW bit during reset, refer to Chapter 2 Pin Description), the IN1_SEL_PRIORITY[3:0] bits and the IN2_SEL_PRIORITY[3:0] bits, as shown in Figure 5 and Table 8: IN1_SEL_PRIORITY[3:0] bits IN1 IN3 attempted to be locked in T0 DPLL IN2 IN4 FF_SRCSW pin For T4 path, the T4 DPLL may lock to a T0 DPLL output or lock independently from T0 path, as determined by the T4_LOCK_T0 bit. When the T4 DPLL locks to the T0 DPLL output, the T4 selected input clock is a 77.76 MHz or 8 kHz signal from the T0 DPLL 77.76 MHz path (refer to Chapter 3.11.5.1 T0 Path), as determined by the T0_FOR_T4 bit. When the T4 path locks independently from the T0 path, the T4 DPLL input clock selection is determined by the T4_INPUT_SEL[3:0] bits. Refer to Table 7: Table 7: Input Clock Selection for T4 Path Control Bits - T4_INPUT_SEL[3:0] other than 0000 0000 Input Clock Selection Forced selection Automatic selection External Fast selection is done between IN1/IN3 and IN2/IN4 pairs. Forced selection is done by setting the related registers. Table 8: External Fast Selection Control Pin & Bits FF_SRCSW (after reset) high low IN1_SEL_PRIORITY[3:0] 0000 other than 0000 don't-care IN2_SEL_PRIORITY[3:0] bits Figure 5. External Fast Selection IN2_SEL_PRIORITY[3:0] don't-care 0000 other than 0000 Selected Input Clock IN3 IN1 IN4 IN2 Functional Description 23 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL 3.6.2 FORCED SELECTION In Forced selection, the selected input clock is set by the T0_INPUT_SEL[3:0] / T4_INPUT_SEL[3:0] bits. The results of input clocks quality monitoring (refer to Chapter 3.5 Input Clock Quality Monitoring) do not affect the input clock selection. 3.6.3 AUTOMATIC SELECTION In Automatic selection, the input clock selection is determined by its validity, priority and locking allowance configuration. The validity depends on the results of input clock quality monitoring (refer to Chapter 3.5 Input Clock Quality Monitoring). Locking allowance is configured by the corresponding INn_VALID bit(1 n 5). Refer to Figure 6. In all the qualified input clocks, the one with the highest priority is selected. The priority is set by the corresponding INn_SEL_PRIORITY[3:0] bits (1 n 5). If more than one qualified input clock INn is available and has the same priority, the input clock with the smallest `n' is selected. Validity Priority Locking Allowance No No No Input Clock Quality Monitoring (Activity, Frequency) INn = '1', (1 n 5) INn_SEL_PRIORITY[3:0] '0000', ((1 n 5)) INn_VALID = '0', ((1 n 5)) Yes Yes All qualified input clocks are available for Automatic selection Yes Figure 6. Qualified Input Clocks for Automatic Selection Table 9: Related Bit / Register in Chapter 3.6 Bit EXT_SW T0_INPUT_SEL[3:0] T4_LOCK_T0 T0_FOR_T4 T4_INPUT_SEL[3:0] INn_SEL_PRIORITY[3:0] (1 n 5) INn_VALID (1 n 5) INn (1 n 5) T4_T0_SEL Register MON_SW_PBO_CNFG T0_INPUT_SEL_CNFG T4_INPUT_SEL_CNFG IN1_IN2_SEL_PRIORITY_CNFG IN3_IN4_SEL_PRIORITY_CNFG IN5_SEL_PRIORITY_CNFG REMOTE_INPUT_VALID1_CNFG, REMOTE_INPUT_VALID2_CNFG INPUT_VALID1_STS, INPUT_VALID2_STS T4_T0_REG_SEL_CNFG Address (Hex) 0B 50 51 27 ~ 28, 2B 4C, 4D 4A, 4B 07 Note: * The setting in the 26 ~ 2C registers is either for T0 path or for T4 path, as determined by the T4_T0_SEL bit. Functional Description 24 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL 3.7 SELECTED INPUT CLOCK MONITORING 3.7.1.3 Fine Phase Loss The quality of the selected input clock is always monitored (refer to Chapter 3.5 Input Clock Quality Monitoring) and the DPLL locking status is always monitored. 3.7.1 T0 / T4 DPLL LOCKING DETECTION The following events are always monitored: * Fast Loss; * Coarse Phase Loss; * Fine Phase Loss; * Hard Limit Exceeding. 3.7.1.1 Fast Loss A fast loss is triggered when the selected input clock misses 2 consecutive clock cycles. It is cleared once an active clock edge is detected. For T0 path, the occurrence of the fast loss will result in T0 DPLL being unlocked if the FAST_LOS_SW bit is `1'. For T4 path, the occurrence of the fast loss will result in T4 DPLL being unlocked regardless of the FAST_LOS_SW bit. 3.7.1.2 Coarse Phase Loss The T0/T4 DPLL compares the selected input clock with the feedback signal. If the phase-compared result exceeds the coarse phase limit, a coarse phase loss is triggered. It is cleared once the phase-compared result is within the coarse phase limit. When the selected input clock is of 2 kHz, 4 kHz or 8 kHz, the coarse phase limit depends on the MULTI_PH_8K_4K_2K_EN bit, the WIDE_EN bit and the PH_LOS_COARSE_LIMT[3:0] bits. Refer to Table 10. When the selected input clock is of other frequencies than 2 kHz, 4 kHz and 8 kHz, the coarse phase limit depends on the WIDE_EN bit and the PH_LOS_COARSE_LIMT[3:0] bits. Refer to Table 11. Table 10: Coarse Phase Limit Programming (the selected input clock of 2 kHz, 4 kHz or 8 kHz) MULTI_PH_8K_4K WIDE_EN _2K_EN 0 1 Coarse Phase Limit The T0/T4 DPLL compares the selected input clock with the feedback signal. If the phase-compared result exceeds the fine phase limit programmed by the PH_LOS_FINE_LIMT[2:0] bits, a fine phase loss is triggered. It is cleared once the phase-compared result is within the fine phase limit. The occurrence of the fine phase loss will result in T0/T4 DPLL being unlocked if the FINE_PH_LOS_LIMT_EN bit is `1'. 3.7.1.4 Hard Limit Exceeding Two limits are available for this monitoring. They are DPLL soft limit and DPLL hard limit. When the frequency of the DPLL output with respect to the master clock exceeds the DPLL soft / hard limit, a DPLL soft / hard alarm will be raised; the alarm is cleared once the frequency is within the corresponding limit. The occurrence of the DPLL soft alarm does not affect the T0/T4 DPLL locking status. The DPLL soft alarm is indicated by the corresponding T0_DPLL_SOFT_FREQ_ALARM / T4_DPLL_SOFT_FREQ_ALARM bit. The occurrence of the DPLL hard alarm will result in T0/T4 DPLL being unlocked if the FREQ_LIMT_PH_LOS bit is `1'. The DPLL soft limit is set by the DPLL_FREQ_SOFT_LIMT[6:0] bits and can be calculated as follows: DPLL Soft Limit (ppm) = DPLL_FREQ_SOFT_LIMT[6:0] X 0.724 The DPLL hard limit is set by the DPLL_FREQ_HARD_LIMT[15:0] bits and can be calculated as follows: DPLL Hard Limit (ppm) = DPLL_FREQ_HARD_LIMT[15:0] X 0.0014 3.7.2 LOCKING STATUS don't-care 1 UI 0 1 UI 1 set by the PH_LOS_COARSE_LIMT[3:0] bits The DPLL locking status depends on the locking monitoring results. The DPLL is in locked state if none of the following events is triggered during 2 seconds; otherwise, the DPLL is unlocked. * Fast Loss (the FAST_LOS_SW bit is `1'); * Coarse Phase Loss (the COARSE_PH_LOS_LIMT_EN bit is `1'); * Fine Phase Loss (the FINE_PH_LOS_LIMT_EN bit is `1'); * DPLL Hard Alarm (the FREQ_LIMT_PH_LOS bit is `1'). If the FAST_LOS_SW bit, the COARSE_PH_LOS_LIMT_EN bit, the FINE_PH_LOS_LIMT_EN bit or the FREQ_LIMT_PH_LOS bit is `0', the DPLL locking status will not be affected even if the corresponding event is triggered. If all these bits are `0', the DPLL will be in locked state in 2 seconds. The DPLL locking status is indicated by the T0_DPLL_LOCK / T4_DPLL_LOCK bit. The T4_STS 1 bit will be set when the locking status of the T4 DPLL changes (from `locked' to `unlocked' or from `unlocked' to `locked'). If the T4_STS 2 bit is `1', an interrupt will be generated. Table 11: Coarse Phase Limit Programming (the selected input clock of other than 2 kHz, 4 kHz and 8 kHz) WIDE_EN 0 1 Coarse Phase Limit 1 UI set by the PH_LOS_COARSE_LIMT[3:0] bits The occurrence of the coarse phase loss will result in T0/T4 DPLL being unlocked if the COARSE_PH_LOS_LIMT_EN bit is `1'. Functional Description 25 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL 3.7.3 PHASE LOCK ALARM (T0 ONLY) A phase lock alarm will be raised when the selected input clock can not be locked in T0 DPLL within a certain period. This period can be calculated as follows: Period (sec.) = TIME_OUT_VALUE[5:0] X MULTI_FACTOR[1:0] * Be cleared when a `1' is written to the corresponding INn_PH_LOCK_ALARM bit; * Be cleared after the period (= TIME_OUT_VALUE[5:0] X MULTI_FACTOR[1:0] in seconds) which starts from when the alarm is raised. The selected input clock with a phase lock alarm is disqualified for T0 DPLL locking. Note that no phase lock alarm is raised if the T4 selected input clock can not be locked. The phase lock alarm is indicated by the corresponding INn_PH_LOCK_ALARM bit (1 n 5). The phase lock alarm can be cleared by the following two ways, as selected by the PH_ALARM_TIMEOUT bit: Table 12: Related Bit / Register in Chapter 3.7 Bit FAST_LOS_SW PH_LOS_FINE_LIMT[2:0] FINE_PH_LOS_LIMT_EN MULTI_PH_8K_4K_2K_EN WIDE_EN PH_LOS_COARSE_LIMT[3:0] COARSE_PH_LOS_LIMT_EN T0_DPLL_SOFT_FREQ_ALARM T4_DPLL_SOFT_FREQ_ALARM T0_DPLL_LOCK T4_DPLL_LOCK DPLL_FREQ_SOFT_LIMT[6:0] FREQ_LIMT_PH_LOS DPLL_FREQ_HARD_LIMT[15:0] T4_STS 1 T4_STS TIME_OUT_VALUE[5:0] MULTI_FACTOR[1:0] INn_PH_LOCK_ALARM (1 n 5) PH_ALARM_TIMEOUT T4_T0_SEL 2 Register PHASE_LOSS_FINE_LIMIT_CNFG Address (Hex) 5B * PHASE_LOSS_COARSE_LIMIT_CNFG 5A * OPERATING_STS 52 DPLL_FREQ_SOFT_LIMIT_CNFG DPLL_FREQ_HARD_LIMIT[15:8]_CNFG, DPLL_FREQ_HARD_LIMIT[7:0]_CNFG INTERRUPTS3_STS INTERRUPTS3_ENABLE_CNFG PHASE_ALARM_TIME_OUT_CNFG IN1_IN2_STS, IN3_IN4_STS, IN5_STS INPUT_MODE_CNFG T4_T0_REG_SEL_CNFG 65 67, 66 0F 12 08 44 ~ 45, 48 09 07 Note: * The setting in the 5A and 5B registers is either for T0 path or for T4 path, as determined by the T4_T0_SEL bit. Functional Description 26 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL 3.8 SELECTED INPUT CLOCK SWITCH If the input clock is selected by External Fast selection or by Forced selection, it can be switched by setting the related registers (refer to Chapter 3.6.1 External Fast Selection (T0 only) & Chapter 3.6.2 Forced Selection) any time. In this case, whether the input clock is qualified for DPLL locking does not affect the clock switch. If the T4 selected input clock is a T0 DPLL output, it can only be switched by setting the T0_FOR_T4 bit. When the input clock is selected by Automatic selection, the input clock switch depends on its validity, priority and locking allowance configuration. If the current selected input clock is disqualified, a new qualified input clock may be switched to. 3.8.1 INPUT CLOCK VALIDITY For all the input clocks, the validity depends on the results of input clock quality monitoring (refer to Chapter 3.5 Input Clock Quality Monitoring). When all of the following conditions are satisfied, the input clock is valid; otherwise, it is invalid. * No no-activity alarm (the INn_NO_ACTIVITY_ALARM bit is `0'); * No frequency hard alarm (the INn_FREQ_HARD_ALARM bit is `0'); * If the IN_NOISE_WINDOW bit is `1', all the edges of the input clock of 2 kHz, 4 kHz or 8 kHz drift inside 5%; if the IN_NOISE_WINDOW bit is `0', this condition is ignored. The validity qualification of the T0 selected input clock is different from that of the T4 selected input clock. The validity qualification of the T4 selected input clock is the same as the above. The T0 selected input clock is valid when all of the above and the following conditions are satisfied; otherwise, it is invalid. * No phase lock alarm, i.e., the INn_PH_LOCK_ALARM bit is `0'; * If the ULTR_FAST_SW bit is `1', the T0 selected input clock misses less than (<) 2 consecutive clock cycles; if the ULTR_FAST_SW bit is `0', this condition is ignored. The validities of all the input clocks are indicated by the INn 1 bit (1 n 5). When the input clock validity changes (from `valid' to `invalid' or from `invalid' to `valid'), the INn 2 bit will be set. If the INn 3 bit is `1', an interrupt will be generated. When the T0 selected input clock has failed, i.e., the validity of the T0 selected input clock changes from `valid' to `invalid', the T0_MAIN_REF_FAILED 1 bit will be set. If the T0_MAIN_REF_FAILED 2 bit is `1', an interrupt will be generated. This interrupt can also be indicated by hardware - the TDO pin, as determined by the LOS_FLAG_TO_TDO bit. When the TDO pin is used to indicate this interrupt, it will be set high when this interrupt is generated and will remain high until this interrupt is cleared. 3.8.2 SELECTED INPUT CLOCK SWITCH When the device is configured as Automatic input clock selection, T0 input clock switch is different from T4 input clock switch. For T0 path, Revertive and Non-Revertive switches are supported, as selected by the REVERTIVE_MODE bit. For T4 path, only Revertive switch is supported. The difference between Revertive and Non-Revertive switches is that whether the selected input clock is switched when another qualified input clock with a higher priority than the current selected input clock is available for selection. In Non-Revertive switch, input clock switch is minimized. Conditions of the qualified input clocks available for T0 selection are different from that for T4 selection, as shown in Table 13: Table 13: Conditions of Qualified Input Clocks Available for T0 & T4 Selection Conditions of Qualified Input Clocks Available for T0 & T4 Selection * Valid, i.e., the INn 1 bit is `1'; * Priority enabled, i.e., the corresponding INn_SEL_PRIORITY[3:0] bits T0 are not `0000'; * Locking to the input clock is allowed, i.e., the corresponding INn_VALID bit is `0'. * Valid (all the validity conditions listed in Chapter 3.8.1 Input Clock Validity are satisfied); * Priority enabled, i.e., the corresponding INn_SEL_PRIORITY[3:0] bits T4 are not `0000'; * Locking to the input clock is allowed, i.e., the corresponding INn_VALID bit is `0'. The input clock is disqualified if any of the above conditions is not satisfied. In summary, the selected input clock can be switched by: * External Fast selection (supported by T0 path only); * Forced selection; * Revertive switch; * Non-Revertive switch (supported by T0 path only); * T4 DPLL locked to T0 DPLL output (supported by T4 path only). 3.8.2.1 Revertive Switch In Revertive switch, the selected input clock is switched when another qualified input clock with a higher priority than the current selected input clock is available. The selected input clock is switched if any of the following is satisfied: * the selected input clock is disqualified; * another qualified input clock with a higher priority than the selected input clock is available. A qualified input clock with the highest priority is selected by revertive switch. If more than one qualified input clock INn is available and has the same priority, the input clock with the smallest `n' is selected. Functional Description 27 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL 3.8.2.2 Non-Revertive Switch (T0 only) In Non-Revertive switch, the T0 selected input clock is not switched when another qualified input clock with a higher priority than the current selected input clock is available. In this case, the selected input clock is switched and a qualified input clock with the highest priority is selected only when the T0 selected input clock is disqualified. If more than one qualified input clock is available and has the same priority, the input clock with the smallest `n' is selected. 3.8.3 SELECTED / QUALIFIED INPUT CLOCKS INDICATION The selected input clock is indicated by the CURRENTLY_SELECTED_INPUT[3:0] bits. Note if the T4 selected input clock is a T0 DPLL output, it can not be indicated by these bits. The qualified input clocks with the three highest priorities are indicated by HIGHEST_PRIORITY_VALIDATED[3:0] bits, the SECOND_ PRIORITY_VALIDATED[3:0] bits and the THIRD_PRIORITY _VALIDATED[3:0] bits respectively. If more than one input clock INn has the same priority, the input clock with the smallest `n' is indicated by the HIGHEST_PRIORITY_VALIDATED[3:0] bits. When the device is configured in Automatic selection and Revertive switch is enabled, the input clock indicated by the CURRENTLY_SELECTED_INPUT[3:0] bits is the same as the one indicated by the HIGHEST_PRIORITY_VALIDATED[3:0] bits; otherwise, they are not the same. When all the input clocks for T4 path become unqualified, the INPUT_TO_T4 1 bit will be set. If the INPUT_TO_T4 2 bit is `1', an interrupt will be generated. Table 14: Related Bit / Register in Chapter 3.8 Bit T0_FOR_T4 INn 1 (1 INn 3 (1 Register T4_INPUT_SEL_CNFG INPUT_VALID1_STS, INPUT_VALID2_STS INTERRUPTS1_STS, INTERRUPTS2_STS INTERRUPTS1_ENABLE_CNFG, INTERRUPTS2_ENABLE_CNFG IN1_IN2_STS, IN3_IN4_STS, IN5_STS PHASE_MON_PBO_CNFG MON_SW_PBO_CNFG INTERRUPTS2_STS INTERRUPTS2_ENABLE_CNFG INTERRUPTS3_STS INTERRUPTS3_ENABLE_CNFG INPUT_MODE_CNFG IN1_IN2_SEL_PRIORITY_CNFG, IN3_IN4_SEL_PRIORITY_CNFG, IN5_SEL_PRIORITY_CNFG REMOTE_INPUT_VALID1_CNFG, REMOTE_INPUT_VALID2_CNFG PRIORITY_TABLE1_STS PRIORITY_TABLE2_STS T4_T0_REG_SEL_CNFG Address (Hex) 51 4A, 4B 0D, 0E 10, 11 44 ~ 45, 48 78 0B 0E 11 0F 12 09 27 ~ 28, 2B 4C, 4D 4E * 4F * 07 n 5) INn 2 (1 n 5) n 5) INn_NO_ACTIVITY_ALARM (1 n 5) INn_FREQ_HARD_ALARM (1 n 5) INn_PH_LOCK_ALARM (1 n 5) IN_NOISE_WINDOW ULTR_FAST_SW LOS_FLAG_TO_TDO T0_MAIN_REF_FAILED 1 T0_MAIN_REF_FAILED 2 INPUT_TO_T4 1 INPUT_TO_T4 2 REVERTIVE_MODE INn_SEL_PRIORITY[3:0] (1 n 5) INn_VALID (1 n 5) CURRENTLY_SELECTED_INPUT[3:0] HIGHEST_PRIORITY_VALIDATED[3:0] SECOND_PRIORITY_VALIDATED[3:0] THIRD_PRIORITY_VALIDATED[3:0] T4_T0_SEL Note: * The setting in the 26 ~ 2C, 4E and 4F registers is either for T0 path or for T4 path, as determined by the T4_T0_SEL bit. Functional Description 28 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL 3.9 SELECTED INPUT CLOCK STATUS VS. DPLL OPERATING MODE 3.9.1 T0 SELECTED INPUT CLOCK VS. DPLL OPERATING MODE by the The operating modes supported by T0 DPLL are more complex than the ones supported by T4 DPLL for T0 path is the main one. T0 DPLL supports three primary operating modes: Free-Run, Locked and Holdover, and three secondary, temporary operating modes: Pre-Locked, Pre-Locked2 and Lost-Phase. T4 DPLL supports three operating modes: Free-Run, Locked and Holdover. The operating modes of T0 DPLL and T4 DPLL can be switched automatically or by force, as controlled by the T0_OPERATING_MODE[2:0] / T4_OPERATING_ MODE[2:0] bits respectively. When the operating mode is switched by force, the operating mode switch is under external control and the status of the selected input clock takes no effect to the operating mode selection. The forced operating mode switch is applicable for special cases, such as testing. When the operating mode is switched automatically, the internal state machines for T0 and for T4 automatically determine the operating mode respectively. The T0 DPLL operating mode is controlled T0_OPERATING_MODE[2:0] bits, as shown in Table 15: Table 15: T0 DPLL Operating Mode Control T0_OPERATING_MODE[2:0] 000 001 010 100 101 110 111 T0 DPLL Operating Mode Automatic Forced - Free-Run Forced - Holdover Forced - Locked Forced - Pre-Locked2 Forced - Pre-Locked Forced - Lost-Phase When the operating mode is switched automatically, the operation of the internal state machine is shown in Figure 7. Whether the operating mode is under external control or is switched automatically, the current operating mode is always indicated by the T0_DPLL_OPERATING_MODE[2:0] bits. When the operating mode switches, the T0_OPERATING_MODE 1 bit will be set. If the T0_OPERATING_MODE 2 bit is `1', an interrupt will be generated. Functional Description 29 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL 1 Free-Run mode 3 2 4 Pre-Locked mode 5 10 Locked mode 6 Holdover mode 9 8 7 11 15 Pre-Locked2 mode 12 Lost-Phase mode 13 14 Figure 7. T0 Selected Input Clock vs. DPLL Automatic Operating Mode Notes to Figure 7: 1. Reset. 2. An input clock is selected. 3. The T0 selected input clock is disqualified AND No qualified input clock is available. 4. The T0 selected input clock is switched to another one. 5. The T0 selected input clock is locked (the T0_DPLL_LOCK bit is `1'). 6. The T0 selected input clock is disqualified AND No qualified input clock is available. 7. The T0 selected input clock is unlocked (the T0_DPLL_LOCK bit is `0'). 8. The T0 selected input clock is locked again (the T0_DPLL_LOCK bit is `1'). 9. The T0 selected input clock is switched to another one. 10. The T0 selected input clock is locked (the T0_DPLL_LOCK bit is `1'). 11. The T0 selected input clock is disqualified AND No qualified input clock is available. 12. The T0 selected input clock is switched to another one. 13. The T0 selected input clock is disqualified AND No qualified input clock is available. 14. An input clock is selected. 15. The T0 selected input clock is switched to another one. Functional Description 30 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL The causes of Item 4, 9, 12, 15 - `the T0 selected input clock is switched to another one' - are: (The T0 selected input clock is disqualified AND Another input clock is switched to) OR (In Revertive switch, a qualified input clock with a higher priority is switched to) OR (The T0 selected input clock is switched to another one by External Fast selection or Forced selection). Refer to Table 13 for details about the input clock qualification for T0 path. 3.9.2 T4 SELECTED INPUT CLOCK VS. DPLL OPERATING MODE by the Notes to Figure 8: 1. Reset. 2. An input clock is selected. 3. (The T4 selected input clock is disqualified) OR (A qualified input clock with a higher priority is switched to) OR (The T4 selected input clock is switched to another one by Forced selection) OR (When T4 DPLL locks to the T0 DPLL output, the T4 selected input clock is switched by setting the T0_FOR_T4 bit). 4. An input clock is selected. 5. No input clock is selected. Refer to Table 13 for details about the input clock qualification for T4 path. Table 17: Related Bit / Register in Chapter 3.9 Bit Register Address (Hex) 53 54 52 0E 11 51 The T4 DPLL operating mode is controlled T4_OPERATING_MODE[2:0] bits, as shown in Table 16: Table 16: T4 DPLL Operating Mode Control T4_OPERATING_MODE[2:0] 000 001 010 100 T4 DPLL Operating Mode Automatic Forced - Free-Run Forced - Holdover Forced - Locked When the operating mode is switched automatically, the operation of the internal state machine is shown in Figure 8: 1 Free-Run mode 2 T0_OPERATING_MODE[2:0] T0_OPERATING_MODE_CNFG T4_OPERATING_MODE[2:0] T4_OPERATING_MODE_CNFG T0_DPLL_OPERATING_MOD E[2:0] OPERATING_STS T0_DPLL_LOCK T0_OPERATING_MODE 1 T0_OPERATING_MODE T0_FOR_T4 2 INTERRUPTS2_STS INTERRUPTS2_ENABLE_CNFG T4_INPUT_SEL_CNFG Locked mode 3 Holdover mode 4 5 Figure 8. T4 Selected Input Clock vs. DPLL Automatic Operating Mode Functional Description 31 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL 3.10 T0 / T4 DPLL OPERATING MODE 3.10.1.1 Free-Run Mode The T0/T4 DPLL gives a stable performance in different applications without being affected by operating conditions or silicon process variations. It integrates a PFD (Phase & Frequency Detector), a LPF (Low Pass Filter) and a DCO (Digital Controlled Oscillator), which form a closed loop. If no input clock is selected, the loop is not closed, and the PFD and LPF do not function. The PFD detects the phase error, including the fast loss, coarse phase loss and fine phase loss (refer to Chapter 3.7.1.1 Fast Loss to Chapter 3.7.1.3 Fine Phase Loss). The averaged phase error of the T0/ T4 DPLL feedback with respect to the selected input clock is indicated by the CURRENT_PH_DATA[15:0] bits. It can be calculated as follows: Averaged Phase Error (ns) = CURRENT_PH_DATA[15:0] X 0.61 In Free-Run mode, the T0 DPLL output refers to the master clock and is not affected by any input clock. The accuracy of the T0 DPLL output is equal to that of the master clock. 3.10.1.2 Pre-Locked Mode In Pre-Locked mode, the T0 DPLL output attempts to track the selected input clock. The Pre-Locked mode is a secondary, temporary mode. 3.10.1.3 Locked Mode In Locked mode, the T0 selected input clock is locked. The phase and frequency offset of the T0 DPLL output track those of the T0 selected input clock. In this mode, if the T0 selected input clock is in fast loss status and the FAST_LOS_SW bit is `1', the T0 DPLL is unlocked (refer to Chapter 3.7.1.1 Fast Loss) and will enter Lost-Phase mode when the operating mode is switched automatically; if the T0 selected input clock is in fast loss status and the FAST_LOS_SW bit is `0', the T0 DPLL locking status is not affected and the T0 DPLL will enter Temp-Holdover mode automatically. 3.10.1.3.1 Temp-Holdover Mode The T0 DPLL will automatically enter Temp-Holdover mode with a selected input clock switch or no qualified input clock available when the operating mode switch is under external control. In Temp-Holdover mode, the T0 DPLL has temporarily lost the selected input clock. The T0 DPLL operation in Temp-Holdover mode and that in Holdover mode are alike (refer to Chapter 3.10.1.5 Holdover Mode) except the frequency offset acquiring methods. See Chapter 3.10.1.5 Holdover Mode for details about the methods. The method is selected by the TEMP_HOLDOVER_MODE[1:0] bits, as shown in Table 18: Table 18: Frequency Offset Control in Temp-Holdover Mode TEMP_HOLDOVER_MODE[1:0] 00 01 10 11 Frequency Offset Acquiring Method the same as that used in Holdover mode Automatic Instantaneous Automatic Fast Averaged Automatic Slow Averaged The LPF filters jitters. Its 3 dB bandwidth and damping factor are programmable. A range of bandwidths and damping factors can be set to meet different application requirements. Generally, the lower the damping factor is, the longer the locking time is and the more the gain is. The DCO controls the DPLL output. The frequency of the DPLL output is always multiplied on the basis of the master clock. The phase and frequency offset of the DPLL output may be locked to those of the selected input clock. The current frequency offset with respect to the master clock is indicated by the CURRENT_DPLL_FREQ[23:0] bits, and can be calculated as follows: Current Frequency Offset (ppm) = CURRENT_DPLL_FREQ[23:0] X 0.000011 3.10.1 T0 DPLL OPERATING MODE The T0 DPLL loop is closed except in Free-Run mode and Holdover mode. For a closed loop, different bandwidths and damping factors can be used depending on DPLL locking stages: starting, acquisition and locked. In the first two seconds when the T0 DPLL attempts to lock to the selected input clock, the starting bandwidth and damping factor are used. They are set by the T0_DPLL_START_BW[4:0] bits and the T0_DPLL_START_DAMPING[2:0] bits respectively. During the acquisition, the acquisition bandwidth and damping factor are used. They are set by the T0_DPLL_ACQ_BW[4:0] bits and the T0_DPLL_ACQ_DAMPING[2:0] bits respectively. When the T0 selected input clock is locked, the locked bandwidth and damping factor are used. They are set by the T0_DPLL_LOCKED_BW[4:0] bits and the T0_DPLL_LOCKED_DAMPING[2:0] bits respectively. The corresponding bandwidth and damping factor are used when the T0 DPLL operates in different DPLL locking stages: starting, acquisition and locked, as controlled by the device automatically. Only the locked bandwidth and damping factor can be used regardless of the T0 DPLL locking stage, as controlled by the AUTO_BW_SEL bit. The device automatically controls the T0 DPLL to exit from TempHoldover mode. 3.10.1.4 Lost-Phase Mode In Lost-Phase mode, the T0 DPLL output attempts to track the selected input clock. The Lost-Phase mode is a secondary, temporary mode. 3.10.1.5 Holdover Mode In Holdover mode, the T0 DPLL resorts to the stored frequency data acquired in Locked mode to control its output. The T0 DPLL output is not Functional Description 32 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL phase locked to any input clock. The frequency offset acquiring method is selected by the MAN_HOLDOVER bit, the AUTO_AVG bit and the FAST_AVG bit, as shown in Table 19: Table 19: Frequency Offset Control in Holdover Mode MAN_HOLDOVER 0 1 AUTO_AVG 0 1 don't-care FAST_AVG don't-care 0 1 Frequency Offset Acquiring Method Automatic Instantaneous Automatic Slow Averaged Automatic Fast Averaged Manual 3.10.1.5.1 Automatic Instantaneous By this method, the T0 DPLL freezes at the operating frequency when it enters Holdover mode. The accuracy is 4.4X10-8 ppm. 3.10.1.5.2 Automatic Slow Averaged By this method, an internal IIR (Infinite Impulse Response) filter is employed to get the frequency offset. The IIR filter gives a 3 dB attenuation point corresponding to a period of 110 minutes. The accuracy is 1.1X10-5 ppm. 3.10.1.5.3 Automatic Fast Averaged By this method, an internal IIR (Infinite Impulse Response) filter is employed to get the frequency offset. The IIR filter gives a 3 dB attenuation point corresponding to a period of 8 minutes. The accuracy is 1.1X10-5 ppm. 3.10.1.5.4 Manual By this method, the frequency offset is set by T0_HOLDOVER_FREQ[23:0] bits. The accuracy is 1.1X10-5 ppm. the Table 20: Holdover Frequency Offset Read READ_AVG FAST_AVG 0 1 Offset Value Read from T0_HOLDOVER_FREQ[23:0] don't-care The value is equal to the one written to. The value is acquired by Automatic Slow Averaged 0 method, not equal to the one written to. The value is acquired by Automatic Fast Averaged 1 method, not equal to the one written to. The frequency offset in ppm is calculated as follows: Holdover Frequency Offset (ppm) = T0_HOLDOVER_FREQ[23:0] X 0.000011 3.10.1.6 Pre-Locked2 Mode In Pre-Locked2 mode, the T0 DPLL output attempts to track the selected input clock. The Pre-Locked2 mode is a secondary, temporary mode. 3.10.2 3.10.2.1 T4 DPLL OPERATING MODE Free-Run Mode The T4 path is simpler compared with the T0 path. In Free-Run mode, the T4 DPLL output refers to the master clock and is affected by any input clock. The accuracy of the T4 DPLL output is equal to that of the master clock. 3.10.2.2 Locked Mode In Locked mode, the T4 selected input clock may be locked in the T4 DPLL. When the T4 selected input clock is locked, the phase and frequency offset of the T4 DPLL output track those of the T4 selected input clock; when unlocked, the phase and frequency offset of the T4 DPLL output attempt to track those of the selected input clock. The T4 DPLL loop is closed in Locked mode. Its bandwidth and damping factor are set by the T4_DPLL_LOCKED_BW[1:0] bits and the T4_DPLL_LOCKED_DAMPING[2:0] bits respectively. 3.10.2.3 Holdover Mode In Holdover mode, the T4 DPLL resorts to the stored frequency data acquired in Locked mode to control its output. The T4 DPLL output is not The frequency offset of the T0 DPLL output is indicated by the CURRENT_DPLL_FREQ[23:0] bits. The device provides a reference for the value to be written to the T0_HOLDOVER_FREQ[23:0] bits. The value to be written can refer to the value read from the CURRENT_DPLL_FREQ[23:0] bits or the T0_HOLDOVER_FREQ[23:0] bits (refer to Chapter 3.10.1.5.5 Holdover Frequency Offset Read); or then be processed by external software filtering. 3.10.1.5.5 Holdover Frequency Offset Read The offset value, which is acquired by Automatic Slow Averaged, Automatic Fast Averaged and is set by related register bits, can be read from the T0_HOLDOVER_FREQ[23:0] bits by setting the READ_AVG bit and the FAST_AVG bit, as shown in Table 20. Functional Description 33 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL phase locked to any input clock. The T4 DPLL freezes at the operating frequency when it enters Holdover mode. The accuracy is 4.4X10-8 ppm. Table 21: Related Bit / Register in Chapter 3.10 Bit CURRENT_PH_DATA[15:0] CURRENT_DPLL_FREQ[23:0] T0_DPLL_START_BW[4:0] T0_DPLL_START_DAMPING[2:0] T0_DPLL_ACQ_BW[4:0] T0_DPLL_ACQ_DAMPING[2:0] T0_DPLL_LOCKED_BW[4:0] T0_DPLL_LOCKED_DAMPING[2:0] AUTO_BW_SEL FAST_LOS_SW TEMP_HOLDOVER_MODE[1:0] MAN_HOLDOVER AUTO_AVG FAST_AVG READ_AVG T0_HOLDOVER_FREQ[23:0] T4_DPLL_LOCKED_BW[1:0] T4_DPLL_LOCKED_DAMPING[2:0] T4_T0_SEL Register CURRENT_DPLL_PHASE[15:8]_STS, CURRENT_DPLL_PHASE[7:0]_STS CURRENT_DPLL_FREQ[23:16]_STS, CURRENT_DPLL_FREQ[15:8]_STS, CURRENT_DPLL_FREQ[7:0]_STS T0_DPLL_START_BW_DAMPING_CNFG T0_DPLL_ACQ_BW_DAMPING_CNFG T0_DPLL_LOCKED_BW_DAMPING_CNFG T0_BW_OVERSHOOT_CNFG PHASE_LOSS_FINE_LIMIT_CNFG Address (Hex) 69 *, 68 * 64 *, 63 *, 62 * 56 57 58 59 5B * T0_HOLDOVER_MODE_CNFG 5C T0_HOLDOVER_FREQ[23:16]_CNFG, T0_HOLDOVER_FREQ[15:8]_CNFG, T0_HOLDOVER_FREQ[7:0]_CNFG T4_DPLL_LOCKED_BW_DAMPING_CNFG T4_T0_REG_SEL_CNFG 5F, 5E, 5D 61 07 Note: * The setting in the 5B, 62 ~ 64, 68 and 69 registers is either for T0 path or for T4 path, as determined by the T4_T0_SEL bit. Functional Description 34 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL 3.11 T0 / T4 DPLL OUTPUT The DPLL output is locked to the selected input clock. According to the phase-compared result of the feedback and the selected input clock, and the DPLL output frequency offset, the PFD output is limited and the DPLL output is frequency offset limited. 3.11.1 PFD OUTPUT LIMIT The PFD output is limited to be within 1 UI or within the coarse phase limit (refer to Chapter 3.7.1.2 Coarse Phase Loss), as determined by the MULTI_PH_APP bit. 3.11.2 FREQUENCY OFFSET LIMIT The DPLL output is limited to be within the DPLL hard limit (refer to Chapter 3.7.1.4 Hard Limit Exceeding). For T0 DPLL, the integral path value can be frozen when the DPLL hard limit is reached. This function, enabled by the T0_LIMT bit, will minimize the subsequent overshoot when T0 DPLL is pulling in. 3.11.3 PBO (T0 ONLY) The PBO function is only supported by the T0 path. When a PBO event is triggered, the phase offset of the selected input clock with respect to the T0 DPLL output is measured. The device then automatically accounts for the measured phase offset and compensates an appropriate phase offset into the DPLL output so that the phase transients on the T0 DPLL output are minimized. A PBO event is triggered if any one of the following conditions occurs: * T0 selected input clock switches (the PBO_EN bit is `1'); * T0 DPLL exits from Holdover mode or Free-Run mode (the PBO_EN bit is `1'); * Phase-time changes on the T0 selected input clock are greater than a programmable limit over an interval of less than 0.1 seconds (the PH_MON_PBO_EN bit is `1'). For the first two conditions, the phase transients on the T0 DPLL output are minimized to be no more than 0.61 ns with PBO. The PBO can also be frozen at the current phase offset by setting the PBO_FREZ bit. When the PBO is frozen, the device will ignore any further PBO events triggered by the above two conditions, and maintain the current phase offset. When the PBO is disabled, there may be a phase shift on the T0 DPLL output and the T0 DPLL output tracks back to 0 degree phase offset with respect to the T0 selected input clock. The last condition is specially for stratum 2 and 3E clocks. The PBO requirement specified in the Telcordia GR-1244-CORE is: `Input phasetime changes of 3.5 s or greater over an interval of less than 0.1 seconds or less shall be built-out by stratum 2 and 3E clocks to reduce the resulting clock phase-time change to less than 50 ns. Phase-time changes of 1.0 s or less over an interval of 0.1 seconds shall not be built-out.' Based on this requirement, phase-time changes of more than 1.0 s but less than 3.5 s that occur over an interval of less than 0.1 seconds may or may not be built-out. An integrated Phase Transient Monitor can be enabled by the PH_MON_EN bit to monitor the phase-time changes on the T0 selected input clock. When the phase-time changes are greater than a limit over an interval of less than 0.1 seconds, a PBO event is triggered and the phase transients on the DPLL output are absorbed. The limit is programmed by the PH_TR_MON_LIMT[3:0] bits, and can be calculated as follows: Limit (ns) = (PH_TR_MON_LIMT[3:0] + 7) X 156 The phase offset induced by PBO will never result in a coarse or fine phase loss. 3.11.4 PHASE OFFSET SELECTION (T0 ONLY) The phase offset of the T0 selected input clock with respect to the T0 DPLL output can be adjusted. If the device is configured as the Master, the PH_OFFSET_EN bit determines whether the input-to-output phase offset is enabled; if the device is configured as the Slave, the input-tooutput phase offset is always enabled. If enabled, the input-to-output phase offset can be adjusted by setting the PH_OFFSET[9:0] bits. The input-to-output phase offset can be calculated as follows: Phase Offset (ns) = PH_OFFSET[9:0] X 0.61 3.11.5 FOUR PATHS OF T0 / T4 DPLL OUTPUTS The T0 DPLL output and the T4 DPLL output are phase aligned with the T0 selected input clock and the T4 selected input clock respectively every 125 s period. Each DPLL has four output paths. 3.11.5.1 T0 Path The four paths for T0 DPLL output are as follows: * 77.76 MHz path - outputs a 77.76 MHz clock; * 16E1/16T1 path - outputs a 16E1 or 16T1 clock, as selected by the IN_SONET_SDH bit; * ETH/OBSAI/16E1/16T1 path - outputs a ETH, OBSAI, 16E1 or 16T1 clock, as selected by the T0_ETH_OBSAI_16E1_16T1_ SEL[1:0] bits; * 12E1/24T1/E3/T3 path - outputs a 12E1, 24T1, E3 or T3 clock, as selected by the T0_12E1_24T1_E3_T3_SEL[1:0] bits. T0 selected input clock is compared with a T0 DPLL output for DPLL locking. The output can only be derived from the 77.76 MHz path or the 16E1/16T1 path. The output path is automatically selected and the output is automatically divided to get the same frequency as the T0 selected input clock. The T0 DPLL 77.76 MHz output or an 8 kHz signal derived from it can be provided for the T4 DPLL input clock selection (refer to Chapter 3.6 T0 / T4 DPLL Input Clock Selection). T0 DPLL outputs are provided for T0/T4 APLL or device output process. Functional Description 35 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL 3.11.5.2 T4 Path The four paths for T4 DPLL output are as follows: * 77.76 MHz path - outputs a 77.76 MHz clock; * 16E1/16T1 path - outputs a 16E1 or 16T1 clock, as selected by the IN_SONET_SDH bit; * GSM/GPS/16E1/16T1 path - outputs a GSM, GPS, 16E1 or 16T1 clock, as selected by the T4_GSM_GPS_16E1_16T1_ SEL[1:0] bits; * 12E1/24T1/E3/T3 path - outputs a 12E1, 24T1, E3 or T3 clock, as selected by the T4_12E1_24T1_E3_T3_SEL[1:0] bits. T4 selected input clock is compared with a T4 DPLL output for DPLL locking. The output can be derived from the 77.76 MHz path or the Table 22: Related Bit / Register in Chapter 3.11 Bit MULTI_PH_APP T0_LIMT PBO_EN PBO_FREZ PH_MON_PBO_EN PH_MON_EN PH_TR_MON_LIMT[3:0] PH_OFFSET_EN PH_OFFSET[9:0] IN_SONET_SDH T0_ETH_OBSAI_16E1_16T1_SEL[1:0] T0_12E1_24T1_E3_T3_SEL[1:0] T4_GSM_GPS_16E1_16T1_SEL[1:0] T4_12E1_24T1_E3_T3_SEL[1:0] T4_TEST_T0_PH T4_T0_SEL 16E1/16T1 path. In this case, the output path is automatically selected and the output is automatically divided to get the same frequency as the T4 selected input clock. In addition, T4 selected input clock is compared with the T0 selected input clock to get the phase difference between T0 and T4 selected input clocks, as determined by the T4_TEST_T0_PH bit. T4 DPLL outputs are provided for T0/T4 APLL or device output process. Register PHASE_LOSS_COARSE_LIMIT_CNFG T0_BW_OVERSHOOT_CNFG MON_SW_PBO_CNFG PHASE_MON_PBO_CNFG PHASE_OFFSET[9:8]_CNFG PHASE_OFFSET[9:8]_CNFG, PHASE_OFFSET[7:0]_CNFG INPUT_MODE_CNFG T0_DPLL_APLL_PATH_CNFG T4_DPLL_APLL_PATH_CNFG T4_INPUT_SEL_CNFG T4_T0_REG_SEL_CNFG Address (Hex) 5A * 59 0B 78 7B 7B, 7A 09 55 60 51 07 Note: * The setting in the 5A register is either for T0 path or for T4 path, as determined by the T4_T0_SEL bit. Functional Description 36 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL 3.12 T0 / T4 APLL 3.13.1 OUTPUT CLOCKS A T0 APLL and a T4 APLL are provided for a better jitter and wander performance of the device output clocks. The bandwidths of the T0/T4 APLL are set by the T0_APLL_BW[1:0] / T4_APLL_BW[1:0] bits respectively. The lower the bandwidth is, the better the jitter and wander performance of the T0/T4 APLL output are. The input of the T0/T4 APLL can be derived from one of the T0 and T4 DPLL outputs, as selected by the T0_APLL_PATH[3:0] / T4_APLL_PATH[3:0] bits respectively. Both the APLL and DPLL outputs are provided for selection for the device output. Table 23: Related Bit / Register in Chapter 3.12 Bit T0_APLL_BW[1:0] T4_APLL_BW[1:0] T0_APLL_PATH[3:0] T4_APLL_PATH[3:0] Register T0_T4_APLL_BW_CNFG T0_DPLL_APLL_PATH_CNFG T4_DPLL_APLL_PATH_CNFG Address (Hex) 6A 55 60 The device provides 5 output clocks. According to the output port technology, the output ports support the following technologies: * PECL/LVDS; * CMOS. OUT1 ~ OUT3 output CMOS signals. OUT4 and OUT5 output PECL or LVDS signals, as selected by the OUT4_PECL_LVDS bit and the OUT5_PECL_LVDS bit respectively. The outputs on OUT1 ~ OUT5 are variable, depending on the signals derived from the T0/T4 DPLL and T0/T4 APLL outputs, and the corresponding OUTn_PATH_SEL[3:0] bits (1 n 5). The derived signal can be from the T0/T4 DPLL and T0/T4 APLL outputs, as selected by the corresponding OUTn_PATH_SEL[3:0] bits (1 n 5). If the signal is derived from one of the T0/T4 DPLL outputs, please refer to Table 24 for the output frequency. If the signal is derived from the T0/T4 APLL output, please refer to Table 25~Table 27 for the output frequency. The outputs on OUT1 to OUT5 can be inverted, as determined by the corresponding OUTn_INV bit (1 n 5). All the output clocks derived from T0/T4 selected input clock are aligned with the T0/T4 selected input clock respectively every 125 s period. 3.13 OUTPUT CLOCKS & FRAME SYNC SIGNALS The device supports 5 output clocks and 2 frame sync output signals altogether. Table 24: Outputs on OUT1 ~ OUT5 if Derived from T0/T4 DPLL Outputs OUTn_DIVIDER[3:0] (Output Divider) 1 0000 0001 0010 0011 0100 0101 0110 0111 1000 1001 1010 1011 1100 1101 1110 1111 outputs on OUT1 ~ OUT5 if derived from T0/T4 DPLL outputs 2 77.76 MHz 12E1 16E1 24T1 16T1 E3 T3 GSM (26 MHz) OBSAI (30.72 MHz) GPS (40 MHz) Output is disabled (output low). 12E1 6E1 3E1 2E1 E1 E1 T1 64 kHz 8 kHz 2 kHz 400 Hz 1Hz Output is disabled (output high). 16E1 8E1 4E1 2E1 24T1 12T1 6T1 4T1 3T1 2T1 16T1 8T1 4T1 2T1 T1 E3 T3 13 MHz 15.36 MHz 20 10 5 Note: 1. 1 n 5. Each output is assigned a frequency divider. 2. E1 = 2.048 MHz, T1 = 1.544 MHz, E3 = 34.368 MHz, T3 = 44.736 MHz. The blank cell means the configuration is reserved. Functional Description 37 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL Table 25: Outputs on OUT1 ~ OUT5 if Derived from T0 APLL OUTn_DIVIDER[3:0] (Output Divider) 1 77.76 MHz X 4 12E1 X 4 0000 0001 0010 0011 0100 0101 0110 0111 1000 1001 1010 1011 1100 1101 1110 1111 6.48 MHz E1 E1 T1 Output is disabled (output high). 622.08 MHz 3 outputs on OUT1 ~ OUT5 if derived from T0 APLL output 2 16E1 X 4 24T1 X 4 16T1 X 4 E3 T3 GSM OBSAI (26 MHz X 2) (30.72 MHz X 10) GPS (40 MHz) Output is disabled (output low). 311.04 MHz 3 155.52 MHz 77.76 MHz 51.84 MHz 38.88 MHz 25.92 MHz 19.44 MHz 48E1 24E1 12E1 8E1 6E1 4E1 3E1 2E1 2E1 64E1 32E1 16E1 8E1 4E1 96T1 48T1 24T1 16T1 12T1 8T1 6T1 4T1 3T1 2T1 T1 2T1 64T1 32T1 16T1 8T1 4T1 61.44 MHz 4 30.72 MHz 4 15.36 MHz 4 7.68 MHz 4 3.84 MHz 4 E3 T3 52 MHz 26 MHz 13 MHz 153.6 MHz 76.8 MHz 38.4 MHz 20 MHz 10 MHz 5 MHz Note: 1. 1 n 5. Each output is assigned a frequency divider. 2. In the APLL, the selected T0/T4 DPLL output may be multiplied. E1 = 2.048 MHz, T1 = 1.544 MHz, E3 = 34.368 MHz, T3 = 44.736 MHz. The blank cell means the configuration is reserved. 3. The 622.08 MHz and 311.04 MHz differential signals are only output on OUT4 and OUT5. 4. The 61.44 MHz, 30.72 MHz, 15.36 MHz, 7.68 MHz and 3.84 MHz outputs are only derived from T0 APLL. Functional Description 38 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL Table 26: Outputs on OUT2 ~ OUT4 if Derived from T4 APLL OUTn_DIVIDER[3:0 ] (Output Divider) 1 77.76 MHz X 4 0000 0001 0010 0011 0100 0101 0110 0111 1000 1001 1010 1011 1100 1101 1110 1111 622.08 MHz 3 outputs on OUT2 ~ OUT4 if derived from T4 APLL output 2 12E1 X 4 16E1 X 4 24T1 X 4 16T1 X 4 E3 T3 GSM (26 MHz X 2) OBSAI (30.72 MHz X 10) GPS (40 MHz) Output is disabled (output low). 311.04 MHz 3 155.52 MHz 77.76 MHz 51.84 MHz 38.88 MHz 25.92 MHz 19.44 MHz 48E1 24E1 12E1 8E1 6E1 4E1 3E1 2E1 E1 E1 T1 Output is disabled (output high). 64E1 32E1 16E1 8E1 4E1 2E1 6.48 MHz 96T1 48T1 24T1 16T1 12T1 8T1 6T1 4T1 3T1 2T1 64T1 32T1 16T1 8T1 4T1 2T1 T1 E3 T3 52 MHz 26 MHz 13 MHz 153.6 MHz 76.8 MHz 38.4 MHz 20 MHz 10 MHz 5 MHz Note: 1. n = 2~4. Each output is assigned a frequency divider. 2. In the APLL, the selected T0/T4 DPLL output may be multiplied. E1 = 2.048 MHz, T1 = 1.544 MHz, E3 = 34.368 MHz, T3 = 44.736 MHz. The blank cell means the configuration is reserved. 3. The 622.08 MHz and 311.04 MHz differential signals are only output on OUT4. Functional Description 39 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL Table 27: Outputs on OUT1 & OUT5 if Derived from T4 APLL outputs on OUT1 & OUT5 if derived from T4 APLL output 2 OUTn_DIVIDER[3 :0] (Output GSM 77.76 MHz X 4 12E1 X 4 16E1 X 4 24T1 X 4 16T1 X 4 E3 T3 ETH Divider) 1 (26 MHz X 2) 0000 0001 0010 0011 0100 0101 0110 0111 1000 1001 1010 1011 1100 1101 1110 1111 622.08 MHz 3 311.04 MHz 3 155.52 MHz 77.76 MHz 51.84 MHz 38.88 MHz 25.92 MHz 19.44 MHz 48E1 24E1 12E1 8E1 6E1 4E1 3E1 2E1 E1 E1 T1 Output is disabled (output high). 64E1 32E1 16E1 8E1 4E1 2E1 6.48 MHz 96T1 48T1 24T1 16T1 12T1 8T1 6T1 4T1 3T1 2T1 64T1 32T1 16T1 8T1 4T1 2T1 T1 125 MHz 25 MHz 5 MHz 62.5 MHz E3 T3 52 MHz 26 MHz 13 MHz 312.5 MHz 156.25 MHz 153.6 MHz 76.8 MHz 38.4 MHz 20 MHz 10 MHz 5 MHz Output is disabled (output low). OBSAI GPS (30.72 MHz X 10) (40 MHz) Note: 1. n = 1 or 5. Each output is assigned a frequency divider. 2. In the APLL, the selected T0/T4 DPLL output may be multiplied. E1 = 2.048 MHz, T1 = 1.544 MHz, E3 = 34.368 MHz, T3 = 44.736 MHz. The blank cell means the configuration is reserved. 3. The 622.08 MHz and 311.04 MHz differential signals are only output on OUT5. Functional Description 40 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL 3.13.2 FRAME SYNC OUTPUT SIGNALS An 8 kHz and a 2 kHz frame sync signals are output on the FRSYNC_8K and MFRSYNC_2K pins if enabled by the 8K_EN and 2K_EN bits respectively. They are CMOS outputs. The two frame sync signals are derived from the T0 APLL output and are aligned with the output clock. They can be synchronized to the frame sync input signal. If the frame sync input signal with respect to the T0 selected input clock is above a limit set by the SYNC_MON_LIMT[2:0] bits, an external sync alarm will be raised and EX_SYNC1 is disabled to synchronize the frame sync output signals. The external sync alarm is cleared once EX_SYNC1 with respect to the T0 selected input clock is within the limit. If it is within the limit, whether EX_SYNC1 is enabled to synchronize the frame sync output signal is determined by the AUTO_EXT_SYNC_EN bit and the EXT_SYNC_EN bit. Refer to Table 28 for details. When the frame sync input signal is enabled to synchronize the frame sync output signal, it should be adjusted to align itself with the T0 Table 28: Synchronization Control AUTO_EXT_SYNC_EN EXT_SYNC_EN don't-care 0 1 0 1 1 selected input clock. Nominally, the falling edge of EX_SYNC1 is aligned with the rising edge of the T0 selected input clock. EX_SYNC1 may be 0.5 UI early/late or 1 UI late due to the circuit and board wiring delays. Setting the sampling of EX_SYNC1 by the SYNC_PH1[1:0] bits will compensate this early/late. Refer to Figure 9 to Figure 12. The EX_SYNC_ALARM_MON bit indicates whether EX_SYNC1 is in external sync alarm status. The external sync alarm is indicated by the EX_SYNC_ALARM 1 bit. If the EX_SYNC_ALARM 2 bit is `1', the occurrence of the external sync alarm will trigger an interrupt. The 8 kHz and the 2 kHz frame sync output signals can be inverted by setting the 8K_INV and 2K_INV bits respectively. The frame sync outputs can be 50:50 duty cycle or pulsed, as determined by the 8K_PUL and 2K_PUL bits respectively. When they are pulsed, the pulse width is defined by the period of OUT1; and they are pulsed on the position of the falling or rising edge of the standard 50:50 duty cycle, as selected by the 2K_8K_PUL_POSITION bit. Synchronization Disabled Enabled Enabled if the T0 selected input clock is IN5; otherwise, disabled. T0 selected input clock EX_SYNC1 Frame sync output signals Output clocks T0 selected input clock EX_SYNC1 Frame sync output signals Output clocks Figure 9. On Target Frame Sync Input Signal Timing Figure 10. 0.5 UI Early Frame Sync Input Signal Timing Functional Description 41 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL T0 selected input clock EX_SYNC1 Frame sync output signals Output clocks T0 selected input clock EX_SYNC1 Frame sync output signals Output clocks Figure 11. 0.5 UI Late Frame Sync Input Signal Timing Table 29: Related Bit / Register in Chapter 3.13 Bit OUT4_PECL_LVDS OUT5_PECL_LVDS OUTn_PATH_SEL[3:0] (1 n 5) OUTn_DIVIDER[3:0] (1 n 5) IN_SONET_SDH AUTO_EXT_SYNC_EN EXT_SYNC_EN 8K_EN 2K_EN 8K_INV 2K_INV 8K_PUL 2K_PUL 2K_8K_PUL_POSITION SYNC_MON_LIMT[2:0] Figure 12. 1 UI Late Frame Sync Input Signal Timing Register DIFFERENTIAL_IN_OUT_OSCI_CNFG OUT1_FREQ_CNFG ~ OUT5_FREQ_CNFG INPUT_MODE_CNFG Address (Hex) 0A 6D ~ 71 09 FR_MFR_SYNC_CNFG 74 SYNC_PH1[1:0] EX_SYNC_ALARM_MON EX_SYNC_ALARM 1 EX_SYNC_ALARM 2 SYNC_MONITOR_CNFG SYNC_PHASE_CNFG OPERATING_STS INTERRUPTS3_STS INTERRUPTS3_ENABLE_CNFG 7C 7D 52 0F 12 Functional Description 42 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL 3.14 MASTER / SLAVE CONFIGURATION Master / Slave configuration is only supported by the T0 path of the device. Two devices should be used together in order to: * Enable system protection against single chip failure; * Guarantee no service interrupt during system maintenance, such as software or hardware upgrade. Of the two devices, one is configured as the Master and the other is configured as the Slave. The configuration is made by the MS/SL pin and the MS_SL_CTRL bit (b0, 13H), as shown in Table 30: Table 30: Device Master / Slave Control Master / Slave Control MS/SL pin High Low MS_SL_CTRL Bit 0 1 0 1 Result Master Slave Slave Master In this application, all the output clocks derived from the T0 selected input clock and the frame sync output signals from the two devices are at the same frequency offset and phase. Refer to Chapter 3.13.2 Frame SYNC Output Signals for details. The difference between the Master and the Slave is: in the Master, the IN5 should not be selected by the T0 DPLL; in the Slave, the following functions are automatically forced: * The T0 selected input clock is IN5; * T0 PBO is disabled; * T0 DPLL operates at the acquisition bandwidth and damping factor; * EX_SYNC1 is used for synchronization; * T0 DPLL operates in Locked mode. In the Slave, the corresponding registers of the above forced functions can still be configured, but their configuration does not take any effect. The frequency of the T0 selected input clock IN5 is recommended to be 6.48 MHz. Backplane connections Hardware control EX_SYNC1 MS/SL IN1 IN2 IN3 IN4 IN5 OUT1 Chip A . . . one output clock OUT5 one output FRSYNC_8K/ frame sync MFRSYNC_2K signal EX_SYNC1 MS/SL IN1 IN2 IN3 IN4 IN5 Backplane OUT1 one output . clock . OUT5 one output FRSYNC_8K/ frame sync MFRSYNC_2K signal Backplane . Chip B Figure 13. Physical Connection Between Two Devices Functional Description 43 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL 3.15 INTERRUPT SUMMARY 3.16 T0 AND T4 SUMMARY The interrupt sources of the device are as follows: * T4 DPLL locking status change * Input clocks for T0 path validity change * T0 selected input clock fail * No qualified input clock for T4 path is available * T0 DPLL operating mode switch * External sync alarm All of the above interrupt events are indicated by the corresponding interrupt status bit. If the corresponding interrupt enable bit is set, any of the interrupts can be reported by the INT_REQ pin. The output characteristics on the INT_REQ pin are determined by the HZ_EN bit and the INT_POL bit. Interrupt events are cleared by writing a `1' to the corresponding interrupt status bit. The INT_REQ pin will be inactive only when all the pending enabled interrupts are cleared. In addition, the interrupt of T0 selected input clock fail can be reported by the TDO pin, as determined by the LOS_FLAG_TO_TDO bit. Table 31: Related Bit / Register in Chapter 3.15 Bit HZ_EN INT_POL LOS_FLAG_TO_TDO Register INTERRUPT_CNFG MON_SW_PBO_CNFG Address (Hex) 0C 0B The main features supported by the T0 path are as follows: * Phase lock alarm; * Forced or Automatic input clock selection/switch; * 3 primary and 3 secondary, temporary DPLL operating modes, switched automatically or under external control; * Automatic switch between starting, acquisition and locked bandwidths/damping factors; * Programmable DPLL bandwidths from 0.5 mHz to 560 Hz in 19 steps; * Programmable damping factors: 1.2, 2.5, 5, 10 and 20; * Fast loss, coarse phase loss, fine phase loss and hard limit exceeding monitoring; * Output phase and frequency offset limited; * Automatic Instantaneous, Automatic Slow Averaged, Automatic Fast Averaged or Manual holdover frequency offset acquiring; * PBO to minimize output phase transients; * Programmable output phase offset; * Low jitter multiple clock outputs with programmable polarity; * Low jitter 2 kHz and 8 kHz frame sync signal outputs with programmable pulse width and polarity; * Master / Slave application to enable system protection against single device failure. The main features supported by the T4 path are as follows: * Forced or Automatic input clock selection/switch; * Locking to T0 DPLL output; * 3 DPLL operating modes, switched automatically or under external control; * Programmable DPLL bandwidth: 18 Hz, 35 Hz, 70 Hz and 560 Hz; * Programmable damping factor: 1.2, 2.5, 5, 10 and 20; * Fast loss, coarse phase loss, fine phase loss and hard limit exceeding monitoring; * Output phase and frequency offset limited; * Automatic Instantaneous holdover frequency offset; * Low jitter multiple clock outputs with programmable polarity. Functional Description 44 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL 3.17 POWER SUPPLY FILTERING TECHNIQUES 3.3V SLF7028T-100M1R1 10 F 0.1 F 0.1 F 0.1 F 0.1 F IDT82V3385 VDDA 0.1 F 6, 19, 91 1, 5, 20, 92 11, 14, 15, 29, 62, 84, 87 33, 39 VDD_DIFF 32, 38 AGND DGND GND_DIFF 3.3V SLF7028T-100M1R1 10 F 0.1 F 0.1 F 0.1 F 0.1 F 0.1 F 0.1 F 0.1 F 0.1 F VDDD 12, 13, 16, 26, 50, 61, 85, 86 Figure 14. IDT82V3385 Power Decoupling Scheme To achieve optimum jitter performance, power supply filtering is required to minimize supply noise modulation of the output clocks. The common sources of power supply noise are switch power supplies and the high switching noise from the outputs to the internal PLL. The IDT82V3385 provides separate VDDA power pins for the internal analog PLL, VDD_DIFF for the differential output driver circuit and VDDD pins for the core logic as well as I/O driver circuits. To minimize switching power supply noise generated by the switching regulator, the power supply output should be filtering with sufficient bulk capacity to minimize ripple and 0.1 uF (0402 case size, ceramic) caps to filter out the switching transients. For the IDT82V3385, the decoupling for VDDA, VDD_DIFF and VDDD are handled individually. VDDD, VDD_DIFF and VDDA should be individually connected to the power supply plane through vias, and bypass capacitors should be used for each pin. Figure 14 illustrated how bypass capacitor and ferrite bead should be connected to power pins. The analog power supply VDDA and VDD_DIFF should have low impedance. This can be achieved by using one 10 uF (1210 case size, ceramic) and at least four 0.1 uF (0402 case size, ceramic) capacitors in parallel. The 0.1 uF (0402 case size, ceramic) capacitors must be placed right next to the VDDA and VDD_DIFF pins as close as possible. Note that the 10 uF capacitor must be of 1210 case size, and it must be ceramic for lowest ESR (Effective Series Resistance) possible. The 0.1 uF should be of case size 0402, this offers the lowest ESL (Effective Series Inductance) to achieve low impedance towards the high speed range. For VDDD, at least ten 0.1 uF (0402 case size, ceramic) and one 10 uF (1210 case size, ceramic) capacitors are recommended. The 0.1 uF capacitors should be placed as close to the VDDD pins as possible. Please refer to evaluation board schematic for details. Functional Description 45 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL 4 TYPICAL APPLICATION The device supports Master / Slave application, as shown in Figure 15: PRS (Primary Reference Source) BITS/SSU Timing Module Stratum 2/3E IDT82V3288 Typical 8 kHz/1.544 MHz/2.048 MHz BITS/SSU Timing Module Stratum 2/3E IDT82V3288 Line Timing Typical 19.44 MHz and other OC-N clock Stratum 2/3E/3/SMC/SEC Module IDT82V3385 Master/Slave Stratum 2/3E/3/SMC/SEC Module IDT82V3385 Line Timing Typical 19.44 MHz and other OC-N clock Central Clock Modules Typical 19.44 MHz and other OC-N clock Typical 19.44 MHz and other OC-N clock SDH/SONET or other Equipment Timing System 155.52 Mbit/s Line Card IDT82V3355 622.08 Mbit/s Line Card IDT82V3355 2.5 Gbit/s Line Card IDT82V3355 10 Gbit/s Line Card IDT82V3355 ... ... Figure 15. Typical Application 4.1 MASTER / SLAVE APPLICATION Master / Slave application is only supported by the T0 path of the device. In Master / Slave application, two devices should be used together. Of the two devices, one is configured as the Master and the other is configured as the Slave. Refer to Chapter 3.14 Master / Slave Configuration for details. Typical Application 46 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL 5 MICROPROCESSOR INTERFACE The microprocessor interface provides access to read and write the registers in the device. The microprocessor interface supports the following five modes: * EPROM mode; * Multiplexed mode; * Intel mode; * Motorola mode; * Serial mode. The microprocessor interface mode is selected by the MPU_SEL_CNFG[2:0] bits (b2~0, 7FH). The interface pins in different interface modes are listed in Table 32: Table 32: Microprocessor Interface MPU_SEL_CNFG[2:0] bits 001 010 011 100 101 Microprocessor Interface Mode ERPOM Multiplexed Intel Motorola Serial Interface Pins CS, A[6:0], AD[7:0] CS, ALE, WR, RD, AD[7:0], RDY CS, WR, RD, A[6:0], AD[7:0], RDY CS, WR, A[6:0], AD[7:0], RDY CS, SCLK, SDI, SDO, CLKE Microprocessor Interface 47 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL 5.1 EPROM MODE In this mode, the device is used with an EPROM. The configuration data will be automatically read from the EPROM after the device is powered on. CS A[6:0] tacc AD[7:0] High-Z address data High-Z Figure 16. EPROM Access Timing Diagram Table 33: Access Timing Characteristics in EPROM Mode Symbol tacc Parameter CS to valid data delay time Min Typ Max 920 Unit ns Microprocessor Interface 48 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL 5.2 MULTIPLEXED MODE tpw3 ALE tsu1 CS tsu2 WR RD td1 AD[7:0] address td2 tpw2 data th3 td5 td6 Figure 17. Multiplexed Read Timing Diagram tT th1 tpw1 th2 td4 RDY High-Z High-Z Table 34: Read Timing Characteristics in Multiplexed Mode Symbol T tin tout tsu1 tsu2 td1 td2 td4 td5 td6 tpw1 tpw2 tpw3 th1 th2 th3 tT tTI Parameter One cycle time of the master clock Delay of input pad Delay of output pad Valid address to ALE falling edge setup time Valid CS to Valid RD setup time Valid RD to valid data delay time Valid CS to valid RDY delay time RD rising edge to AD[7:0] high impedance delay time RD rising edge to RDY low delay time CS rising edge to RDY release delay time Valid RD pulse width low Valid RDY pulse width low Valid ALE pulse width high Valid address after ALE falling edge hold time Valid CS after RD rising edge hold time Valid RD after RDY rising edge hold time Time between ALE falling edge and RD falling edge Time between consecutive Read-Read or Read-Write accesses (RD rising edge to ALE rising edge) 4.5T + 10 * 4.5T + 10 2 3 0 0 0 >T 13 10 13 13 2 0 3.5T + 10 Min Typ 12.86 5 5 Max Unit ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns Note: * Timing with RDY. If RDY is not used, tpw1 is 3.5T + 10. Microprocessor Interface 49 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL tpw3 ALE tsu1 CS th1 tT RD WR tsu2 tpw1 th2 tsu3 AD[7:0] address td2 RDY High-Z tpw2 data th3 th4 td5 High-Z td6 Figure 18. Multiplexed Write Timing Diagram Table 35: Write Timing Characteristics in Multiplexed Mode Symbol T tin tout tsu1 tsu2 tsu3 td2 td5 td6 tpw1 tpw2 tpw3 th1 th2 th3 th4 tT tTI Parameter One cycle time of the master clock Delay of input pad Delay of output pad Valid address to ALE falling edge setup time Valid CS to valid WR setup time Valid data to WR rising edge setup time Valid CS to valid RDY delay time WR rising edge to RDY low delay time CS rising edge to RDY release delay time Valid WR pulse width low Valid RDY pulse width low Valid ALE pulse width high Valid address after ALE falling edge hold time Valid CS after WR rising edge hold time Valid WR after RDY rising edge hold time Valid data after WR rising edge hold time Time between ALE falling edge and WR falling edge Time between consecutive Write-Read or Write-Write accesses (WR rising edge to ALE rising edge) 1.5T + 10 1.5T + 10 2 3 0 0 9 0 >7T 2 0 3 13 13 13 Min Typ 12.86 5 5 Max Unit ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns Microprocessor Interface 50 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL 5.3 INTEL MODE CS WR tsu2 RD tsu1 A[6:0] High-Z AD[7:0] td2 RDY High-Z td6 Figure 19. Intel Read Timing Diagram Table 36: Read Timing Characteristics in Intel Mode Symbol T tin tout tsu1 tsu2 td1 td2 td4 td5 td6 tpw1 tpw2 th1 th2 th3 tTI Parameter One cycle time of the master clock Delay of input pad Delay of output pad Valid address to valid CS setup time Valid CS to valid RD setup time Valid RD to valid data delay time Valid CS to valid RDY delay time RD rising edge to AD[7:0] high impedance delay time RD rising edge to RDY low delay time CS rising edge to RDY release delay time Valid RD pulse width low Valid RDY pulse width low Valid address after RD rising edge hold time Valid CS after RD rising edge hold time Valid RD after RDY rising edge hold time Time between consecutive Read-Read or Read-Write accesses (RD rising edge to RD falling edge, or RD rising edge to WR falling edge) 4.5T + 10 * 4.5T + 10 0 0 0 >T 13 10 13 13 0 0 3.5T + 10 Min Typ 12.86 5 5 Max Unit ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns tpw1 th2 th1 address td1 data tpw2 th3 td5 High-Z td4 High-Z Note: * Timing with RDY. If RDY is not used, tpw1 is 3.5T + 10. Microprocessor Interface 51 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL CS tsu2 WR tpw1 th2 RD tsu1 A[6:0] address tsu3 AD[7:0] td2 RDY High-Z td6 Figure 20. Intel Write Timing Diagram Table 37: Write Timing Characteristics in Intel Mode Symbol T tin tout tsu1 tsu2 tsu3 td2 td5 td6 tpw1 tpw2 th1 th2 th3 th4 tTI Parameter One cycle time of the master clock Delay of input pad Delay of output pad Valid address to valid CS setup time Valid CS to valid WR setup time Valid data before WR rising edge setup time Valid CS to valid RDY delay time WR rising edge to RDY low delay time CS rising edge to RDY release delay time Valid WR pulse width low Valid RDY pulse width low Valid address after WR rising edge hold time Valid CS after WR rising edge hold time Valid WR after RDY rising edge hold time Valid data after WR rising edge hold time Time between consecutive Write-Read or Write-Write accesses (WR rising edge to WR falling edge, or WR rising edge to RD falling edge) 1.5T + 10 1.5T + 10 0 0 0 9 >7T 0 0 3 13 13 13 Min Typ 12.86 5 5 Max Unit ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns th1 th4 data tpw2 th3 td5 High-Z Microprocessor Interface 52 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL 5.4 MOTOROLA MODE CS tsu2 WR tsu1 A[6:0] AD[7:0] High-Z td2 RDY High-Z address td1 tpw1 th2 th1 td3 data tpw2 th3 td4 tr1 High-Z High-Z Figure 21. Motorola Read Timing Diagram Table 38: Read Timing Characteristics in Motorola Mode Symbol T tin tout tsu1 tsu2 td1 td2 td3 td4 tpw1 tpw2 th1 th2 th3 tr1 tTI Parameter One cycle time of the master clock Delay of input pad Delay of output pad Valid address to valid CS setup time Valid WR to valid CS setup time Valid CS to valid data delay time Valid CS to valid RDY delay time CS rising edge to AD[7:0] high impedance delay time CS rising edge to RDY release delay time Valid CS pulse width low Valid RDY pulse width high Valid address after CS rising edge hold time Valid WR after CS rising edge hold time Valid CS after RDY falling edge hold time RDY release time Time between consecutive Read-Read or Read-Write accesses (CS rising edge to CS falling edge) >T 4.5T + 10 * 4.5T + 10 0 0 0 3 13 10 13 0 0 3.5T + 10 Min Typ 12.86 5 5 ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns Max Unit Note: * Timing with RDY. If RDY is not used, tpw1 is 3.5T +10. Microprocessor Interface 53 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL tpw1 CS tsu2 WR tsu1 A[6:0] address tsu3 AD[7:0] td2 RDY High-Z Figure 22. Motorola Write Timing Diagram Table 39: Write Timing Characteristics in Motorola Mode Symbol T tin tout tsu1 tsu2 tsu3 td2 td4 tpw1 tpw2 th1 th2 th3 th4 tr1 tTI Parameter One cycle time of the master clock Delay of input pad Delay of output pad Valid address to valid CS setup time Valid WR to valid CS setup time Valid data before CS rising edge setup time Valid CS to valid RDY delay time CS rising edge to RDY release delay time Valid CS pulse width low Valid RDY pulse width high Valid address after valid CS rising edge hold time Valid WR after valid CS rising edge hold time Valid CS after RDY falling edge hold time Valid data after valid CS rising edge hold time RDY release time Time between consecutive Write-Write or Write-Read accesses (CS rising edge to CS falling edge) > 7T 1.5T + 10 1.5T + 10 0 0 0 9 3 0 0 3 13 13 Min Typ 12.86 5 5 Max Unit ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns th2 th1 th4 data tpw2 th3 td4 tr1 High-Z Microprocessor Interface 54 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL 5.5 SERIAL MODE In a read operation, the active edge of SCLK is selected by CLKE. When CLKE is asserted low, data on SDO will be clocked out on the ris- ing edge of SCLK. When CLKE is asserted high, data on SDO will be clocked out on the falling edge of SCLK. In a write operation, data on SDI will be clocked in on the rising edge of SCLK. CS tsu2 SCLK tsu1 SDI th1 tpw1 A0 A1 A2 A3 A4 A5 A6 tpw2 th2 R/W td1 SDO High-Z D0 D1 D2 D3 D4 D5 D6 td2 D7 Figure 23. Serial Read Timing Diagram (CLKE Asserted Low) CS th2 SCLK SDI R/W A0 A1 A2 A3 A4 A5 A6 td1 High-Z td2 D0 D1 D2 D3 D4 D5 D6 D7 SDO Figure 24. Serial Read Timing Diagram (CLKE Asserted High) Table 40: Read Timing Characteristics in Serial Mode Symbol T tin tout tsu1 tsu2 td1 td2 tpw1 tpw2 th1 th2 tTI Parameter One cycle time of the master clock Delay of input pad Delay of output pad Valid SDI to valid SCLK setup time Valid CS to valid SCLK setup time Valid SCLK to valid data delay time CS rising edge to SDO high impedance delay time SCLK pulse width low SCLK pulse width high Valid SDI after valid SCLK hold time Valid CS after valid SCLK hold time (CLKE = 0/1) Time between consecutive Read-Read or Read-Write accesses (CS rising edge to CS falling edge) 3.5T + 5 3.5T + 5 6 5 10 4 14 10 10 Min Typ 12.86 5 5 Max Unit ns ns ns ns ns ns ns ns ns ns ns ns Microprocessor Interface 55 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL CS tsu2 SCLK tsu1 SDI SDO R/W A0 A1 A2 tpw2 th2 th1 tpw1 A3 A4 A5 A6 D0 D1 D2 D3 D4 D5 D6 D7 High-Z Figure 25. Serial Write Timing Diagram Table 41: Write Timing Characteristics in Serial Mode Symbol T tin tout tsu1 tsu2 tpw1 tpw2 th1 th2 tTI Parameter One cycle time of the master clock Delay of input pad Delay of output pad Valid SDI to valid SCLK setup time Valid CS to valid SCLK setup time SCLK pulse width low SCLK pulse width high Valid SDI after valid SCLK hold time Valid CS after valid SCLK hold time Time between consecutive Write-Write or Write-Read accesses (CS rising edge to CS falling edge) 4 14 3.5T 3.5T 6 5 10 Min Typ 12.86 5 5 Max Unit ns ns ns ns ns ns ns ns ns ns Microprocessor Interface 56 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL 6 JTAG This device is compliant with the IEEE 1149.1 Boundary Scan standard except the following: * The output boundary scan cells do not capture data from the core and the device does not support EXTEST instruction; * The TRST pin is set low by default and JTAG is disabled in order to be consistent with other manufacturers. The JTAG interface timing diagram is shown in Figure 26. tTCK TCK tS TMS TDI tH tD TDO Figure 26. JTAG Interface Timing Diagram Table 42: JTAG Timing Characteristics Symbol tTCK tS tH tD Parameter TCK period TMS / TDI to TCK setup time TCK to TMS / TDI Hold Time TCK to TDO delay time Min 100 25 25 50 Typ Max Unit ns ns ns ns JTAG 57 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL 7 PROGRAMMING INFORMATION The access of the Multi-word Registers is different from that of the Single-word Registers. Take the registers (04H, 05H and 06H) for an example, the write operation for the Multi-word Registers follows a fixed sequence. The register (04H) is configured first and the register (06H) is configured last. The three registers are configured continuously and should not be interrupted by any operation. The crystal calibration configuration will take effect after all the three registers are configured. During read operation, the register (04H) is read first and the register (06H) is read last. The crystal calibration reading should be continuous and not be interrupted by any operation. Certain bit locations within the device register map are designated as Reserved. To ensure proper and predictable operation, bits designated as Reserved should not be written by the users. In addition, their value should be masked out from any testing or error detection methods that are implemented. After reset, all the registers are set to their default values. The registers are read or written via the microprocessor interface. Before any write operation, the value in register PROTECTION_CNFG is recommended to be confirmed to make sure whether the write operation is enabled. The device provides 3 register protection modes: * Protected mode: no other registers can be written except register PROTECTION_CNFG itself; * Fully Unprotected mode: all the writable registers can be written; * Single Unprotected mode: one more register can be written besides register PROTECTION_CNFG. After write operation (not including writing a `1' to clear a bit to `0'), the device automatically switches to Protected mode. Writing `0' to the registers will take no effect if the registers are cleared by writing `1'. T0 and T4 paths share some registers, whose addresses are 27H, 28H, 2BH, 4EH, 4FH, 5AH, 5BH, 62H ~ 64H, 68H and 69H. The names of shared registers are marked with a *. Before register read/write operation, register T4_T0_REG_SEL_CNFG is recommended to be confirmed to make sure whether the register operation is available for T0 or T4 path. Table 43: Register List and Map Address (Hex) 00 01 02 04 Register Name Bit 7 Bit 6 Bit 5 7.1 REGISTER MAP Table 43 is the map of all the registers, sorted in an ascending order of their addresses. Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Reference Page P 63 P 64 Global Control Registers ID[7:0] - Device ID 1 ID[15:8] - Device ID 2 MPU_PIN_STS - MPU_MODE[2:0] Pins Status NOMINAL_FREQ[7:0]_CNFG - Crystal Oscillator Frequency Offset Calibration Configuration 1 NOMINAL_FREQ[15:8]_CNFG - Crystal Oscillator Frequency Offset Calibration Configuration 2 NOMINAL_FREQ[23:16]_CNFG Crystal Oscillator Frequency Offset Calibration Configuration 3 T4_T0_REG_SEL_CNFG - T0 / T4 Registers Selection Configuration PHASE_ALARM_TIME_OUT_CNFG Phase Lock Alarm Time-Out Configuration ID[7:0] ID[15:8] MPU_PIN_STS[2:0] P 64 P 64 NOMINAL_FREQ_VALUE[7:0] 05 NOMINAL_FREQ_VALUE[15:8] P 64 06 07 08 NOMINAL_FREQ_VALUE[23:16] T4_T0_SE L - P 65 P 65 P 66 MULTI_FACTOR[1:0] TIME_OUT_VALUE[5:0] IN_SONET MASTER_ REVERTIV _SDH SLAVE E_MODE OSC_EDG OUT5_PE OUT4_PE E CL_LVDS CL_LVDS 09 0A AUTO_EX PH_ALAR INPUT_MODE_CNFG - Input Mode EXT_SYN T_SYNC_ M_TIMEO Configuration C_EN EN UT DIFFERENTIAL_IN_OUT_OSCI_CNF G - Differential Input / Output Port & Master Clock Configuration SYNC_FREQ[1:0] P 67 - - P 68 Programming Information 58 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL Table 43: Register List and Map (Continued) Address (Hex) 0B 13 7E 7F Register Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Reference Page P 69 P 70 P 70 P 71 0C 0D 0E 0F 10 11 12 16 17 18 19 1A 1F 23 24 25 27 MON_SW_PBO_CNFG - Frequency LOS_FLA FREQ_MO FREQ_MO ULTR_FAS PBO_FRE Monitor, Input Clock Selection & PBO G_TO_TD EXT_SW PBO_EN N_HARD_ N_CLK T_SW Z Control O EN MS_SL_CTRL_CNFG - Master Slave MS_SL_C Control TRL PROTECTION_CNFG - Register ProPROTECTION_DATA[7:0] tection Mode Configuration MPU_SEL_CNFG - Microprocessor MPU_SEL_CNFG[2:0] Interface Mode Configuration Interrupt Registers INTERRUPT_CNFG - Interrupt ConfigHZ_EN INT_POL uration INTERRUPTS1_STS - Interrupt Status IN[4:1] 1 T0_OPER T0_MAIN_ INTERRUPTS2_STS - Interrupt Status IN5 ATING_MO REF_FAIL 2 DE ED INTERRUPTS3_STS - Interrupt Status EX_SYNC INPUT_TO T4_STS 3 _ALARM _T4 INTERRUPTS1_ENABLE_CNFG IN[4:1] Interrupt Control 1 T0_OPER T0_MAIN_ INTERRUPTS2_ENABLE_CNFG ATING_MO REF_FAIL IN5 Interrupt Control 2 DE ED INTERRUPTS3_ENABLE_CNFG - EX_SYNC INPUT_TO T4_STS Interrupt Control 3 _ALARM _T4 Input Clock Frequency & Priority Configuration Registers IN1_CNFG - Input Clock 1 Configura- DIRECT_D LOCK_8K BUCKET_SEL[1:0] IN_FREQ[3:0] tion IV IN2_CNFG - Input Clock 2 Configura- DIRECT_D LOCK_8K BUCKET_SEL[1:0] IN_FREQ[3:0] tion IV IN3_IN4_HF_DIV_CNFG - Input Clock 3 & 4 High Frequency Divider ConfiguIN4_DIV[1:0] IN3_DIV[1:0] ration IN3_CNFG - Input Clock 3 Configura- DIRECT_D LOCK_8K BUCKET_SEL[1:0] IN_FREQ[3:0] tion IV IN4_CNFG - Input Clock 4 Configura- DIRECT_D LOCK_8K BUCKET_SEL[1:0] IN_FREQ[3:0] tion IV IN5_CNFG - Input Clock 5 Configura- DIRECT_D LOCK_8K BUCKET_SEL[1:0] IN_FREQ[3:0] tion IV PRE_DIV_CH_CNFG - DivN Divider PRE_DIV_CH_VALUE[3:0] Channel Selection PRE_DIVN[7:0]_CNFG - DivN Divider PRE_DIVN_VALUE[7:0] Division Factor Configuration 1 PRE_DIVN[14:8]_CNFG DivN PRE_DIVN_VALUE[14:8] Divider Division Factor Configuration 2 IN1_IN2_SEL_PRIORITY_CNFG Input Clock 1 & 2 Priority Configuration IN2_SEL_PRIORITY[3:0] IN1_SEL_PRIORITY[3:0] * P 72 P 72 P 73 P 74 P 74 P 75 P 75 P 76 P 77 P 78 P 79 P 80 P 81 P 82 P 82 P 83 P 84 Programming Information 59 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL Table 43: Register List and Map (Continued) Address (Hex) 28 2B Register Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Reference Page P 85 P 86 2E 2F 31 32 33 34 35 36 37 38 39 3A 3B 3C 3D 3E 3F 40 IN3_IN4_SEL_PRIORITY_CNFG Input Clock 3 & 4 Priority Configuration IN4_SEL_PRIORITY[3:0] IN3_SEL_PRIORITY[3:0] * IN5_SEL_PRIORITY_CNFG - Input IN5_SEL_PRIORITY[3:0] Clock 5 Priority Configuration * Input Clock Quality Monitoring Configuration & Status Registers FREQ_MON_FACTOR_CNFG - FacFREQ_MON_FACTOR[3:0] tor of Frequency Monitor Configuration ALL_FREQ_MON_THRESHOLD_CN FG - Frequency Monitor Threshold for ALL_FREQ_HARD_THRESHOLD[3:0] All Input Clocks Configuration UPPER_THRESHOLD_0_CNFG Upper Threshold for Leaky Bucket UPPER_THRESHOLD_0_DATA[7:0] Configuration 0 LOWER_THRESHOLD_0_CNFG Lower Threshold for Leaky Bucket LOWER_THRESHOLD_0_DATA[7:0] Configuration 0 BUCKET_SIZE_0_CNFG - Bucket BUCKET_SIZE_0_DATA[7:0] Size for Leaky Bucket Configuration 0 DECAY_RATE_0_CNFG - Decay Rate DECAY_RATE_0_DATA for Leaky Bucket Configuration 0 [1:0] UPPER_THRESHOLD_1_CNFG Upper Threshold for Leaky Bucket UPPER_THRESHOLD_1_DATA[7:0] Configuration 1 LOWER_THRESHOLD_1_CNFG Lower Threshold for Leaky Bucket LOWER_THRESHOLD_1_DATA[7:0] Configuration 1 BUCKET_SIZE_1_CNFG - Bucket BUCKET_SIZE_1_DATA[7:0] Size for Leaky Bucket Configuration 1 DECAY_RATE_1_CNFG - Decay Rate DECAY_RATE_1_DATA for Leaky Bucket Configuration 1 [1:0] UPPER_THRESHOLD_2_CNFG Upper Threshold for Leaky Bucket UPPER_THRESHOLD_2_DATA[7:0] Configuration 2 LOWER_THRESHOLD_2_CNFG Lower Threshold for Leaky Bucket LOWER_THRESHOLD_2_DATA[7:0] Configuration 2 BUCKET_SIZE_2_CNFG - Bucket BUCKET_SIZE_2_DATA[7:0] Size for Leaky Bucket Configuration 2 DECAY_RATE_2_CNFG - Decay Rate DECAY_RATE_2_DATA for Leaky Bucket Configuration 2 [1:0] UPPER_THRESHOLD_3_CNFG Upper Threshold for Leaky Bucket UPPER_THRESHOLD_3_DATA[7:0] Configuration 3 LOWER_THRESHOLD_3_CNFG Lower Threshold for Leaky Bucket LOWER_THRESHOLD_3_DATA[7:0] Configuration 3 BUCKET_SIZE_3_CNFG - Bucket BUCKET_SIZE_3_DATA[7:0] Size for Leaky Bucket Configuration 3 DECAY_RATE_3_CNFG - Decay Rate DECAY_RATE_3_DATA for Leaky Bucket Configuration 3 [1:0] P 87 P 87 P 88 P 88 P 88 P 89 P 89 P 89 P 90 P 90 P 90 P 91 P 91 P 91 P 92 P 92 P 92 P 93 Programming Information 60 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL Table 43: Register List and Map (Continued) Address (Hex) 41 42 44 Register Name IN_FREQ_READ_CH_CNFG - Input Clock Frequency Read Channel Selection IN_FREQ_READ_STS - Input Clock Frequency Read Value IN1_IN2_STS - Input Clock 1 & 2 Status IN3_IN4_STS - Input Clock 3 & 4 Status IN5_STS - Input Clock 5 Status Bit 7 Bit 6 Bit 5 Bit 4 IN_FREQ_VALUE[7:0] IN2_FREQ _HARD_A LARM IN4_FREQ _HARD_A LARM IN2_NO_A CTIVITY_A LARM IN4_NO_A CTIVITY_A LARM IN2_PH_L OCK_ALA RM IN4_PH_L OCK_ALA RM IN1_FREQ _HARD_A LARM IN3_FREQ _HARD_A LARM IN5_FREQ _HARD_A LARM IN1_NO_A CTIVITY_A LARM IN3_NO_A CTIVITY_A LARM IN5_NO_A CTIVITY_A LARM IN1_PH_L OCK_ALA RM IN3_PH_L OCK_ALA RM IN5_PH_L OCK_ALA RM Bit 3 Bit 2 Bit 1 Bit 0 Reference Page P 93 P 94 P 95 IN_FREQ_READ_CH[3:0] 45 - - P 96 48 - - P 97 4A 4B 4C 4D 4E 4F 50 51 52 53 54 55 56 57 T0 / T4 DPLL Input Clock Selection Registers INPUT_VALID1_STS - Input Clocks IN[4:1] Validity 1 INPUT_VALID2_STS - Input Clocks IN5 Validity 2 REMOTE_INPUT_VALID1_CNFG -D IN4_VALID IN3_VALID IN2_VALID IN1_VALID Input Clocks Validity Configuration 1 REMOTE_INPUT_VALID2_CNFG IN5_VALID Input Clocks Validity Configuration 2 PRIORITY_TABLE1_STS - Priority HIGHEST_PRIORITY_VALIDATED[3:0] CURRENTLY_SELECTED_INPUT[3:0] Status 1 * PRIORITY_TABLE2_STS - Priority SECOND_HIGHEST_PRIORITY_VALIDATED[3:0 THIRD_HIGHEST_PRIORITY_VALIDATED[3:0] Status 2 * ] T0_INPUT_SEL_CNFG - T0 Selected T0_INPUT_SEL[3:0] Input Clock Configuration T4_LOCK_ T0_FOR_T T4_TEST_ T4_INPUT_SEL_CNFG - T4 Selected T4_INPUT_SEL[3:0] T0 4 T0_PH Input Clock Configuration T0 / T4 DPLL State Machine Control Registers EX_SYNC T0_DPLL_ T4_DPLL_ OPERATING_STS - DPLL Operating T4_DPLL_ T0_DPLL_ _ALARM_ SOFT_FRE SOFT_FRE T0_DPLL_OPERATING_MODE[2:0] Status LOCK LOCK MON Q_ALARM Q_ALRAM T0_OPERATING_MODE_CNFG - T0 T0_OPERATING_MODE[2:0] DPLL Operating Mode Configuration T4_OPERATING_MODE_CNFG - T4 T4_OPERATING_MODE[2:0] DPLL Operating Mode Configuration T0 / T4 DPLL & APLL Configuration Registers T0_DPLL_APLL_PATH_CNFG - T0 T0_GSM_OBSAI_16E1 T0_12E1_24T1_E3_T3 T0_APLL_PATH[3:0] DPLL & APLL Path Configuration _16T1_SEL[1:0] _SEL[1:0] T0_DPLL_START_BW_DAMPING_C NFG - T0 DPLL Start Bandwidth & T0_DPLL_START_DAMPING[2:0] T0_DPLL_START_BW[4:0] Damping Factor Configuration T0_DPLL_ACQ_BW_DAMPING_CNF G - T0 DPLL Acquisition Bandwidth & T0_DPLL_ACQ_DAMPING[2:0] T0_DPLL_ACQ_BW[4:0] Damping Factor Configuration P 98 P 98 P 98 P 99 P 99 P 100 P 101 P 102 P 103 P 104 P 104 P 105 P 106 P 107 Programming Information 61 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL Table 43: Register List and Map (Continued) Address (Hex) 58 Register Name T0_DPLL_LOCKED_BW_DAMPING_ CNFG - T0 DPLL Locked Bandwidth & Damping Factor Configuration T0_BW_OVERSHOOT_CNFG - T0 DPLL Bandwidth Overshoot Configuration PHASE_LOSS_COARSE_LIMIT_CNF G - Phase Loss Coarse Detector Limit Configuration * PHASE_LOSS_FINE_LIMIT_CNFG Phase Loss Fine Detector Limit Configuration * T0_HOLDOVER_MODE_CNFG - T0 DPLL Holdover Mode Configuration T0_HOLDOVER_FREQ[7:0]_CNFG T0 DPLL Holdover Frequency Configuration 1 T0_HOLDOVER_FREQ[15:8]_CNFG - T0 DPLL Holdover Frequency Configuration 2 T0_HOLDOVER_FREQ[23:16]_CNFG - T0 DPLL Holdover Frequency Configuration 3 T4_DPLL_APLL_PATH_CNFG - T4 DPLL & APLL Path Configuration T4_DPLL_LOCKED_BW_DAMPING_ CNFG - T4 DPLL Locked Bandwidth & Damping Factor Configuration CURRENT_DPLL_FREQ[7:0]_STS DPLL Current Frequency Status 1 * CURRENT_DPLL_FREQ[15:8]_STS DPLL Current Frequency Status 2 * CURRENT_DPLL_FREQ[23:16]_STS - DPLL Current Frequency Status 3 * DPLL_FREQ_SOFT_LIMIT_CNFG DPLL Soft Limit Configuration DPLL_FREQ_HARD_LIMIT[7:0]_CNF G - DPLL Hard Limit Configuration 1 DPLL_FREQ_HARD_LIMIT[15:8]_CN FG - DPLL Hard Limit Configuration 2 CURRENT_DPLL_PHASE[7:0]_STS DPLL Current Phase Status 1 * CURRENT_DPLL_PHASE[15:8]_STS - DPLL Current Phase Status 2 * T0_T4_APLL_BW_CNFG - T0 / T4 APLL Bandwidth Configuration OUT1_FREQ_CNFG - Output Clock 1 Frequency Configuration Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Reference Page P 108 T0_DPLL_LOCKED_DAMPING[2:0] AUTO_BW _SEL T0_DPLL_LOCKED_BW[4:0] 59 - - - T0_LIMT - - - P 109 5A 5B 5C 5D COARSE_ MULTI_PH MULTI_PH PH_LOS_L WIDE_EN _8K_4K_2 PH_LOS_COARSE_LIMT[3:0] _APP IMT_EN K_EN FINE_PH_ FAST_LOS LOS_LIMT PH_LOS_FINE_LIMT[2:0] _SW _EN MAN_HOL AUTO_AV READ_AV TEMP_HOLDOVER_M FAST_AVG DOVER G G ODE[1:0] T0_HOLDOVER_FREQ[7:0] P 110 P 111 P 112 P 112 5E T0_HOLDOVER_FREQ[15:8] P 113 5F 60 61 62 63 64 65 66 67 68 69 6A T0_HOLDOVER_FREQ[23:16] T4_APLL_PATH[3:0] T4_DPLL_LOCKED_DAMPING[2:0] T4_GSM_GPS_16E1_1 T4_12E1_24T1_E3_T3 6T1_SEL[1:0] _SEL[1:0] T4_DPLL_LOCKED_B W[1:0] P 113 P 114 P 115 P 115 P 115 P 116 P 116 P 116 P 117 P 117 P 117 T4_APLL_BW[1:0] P 118 CURRENT_DPLL_FREQ[7:0] CURRENT_DPLL_FREQ[15:8] CURRENT_DPLL_FREQ[23:16] FREQ_LIM T_PH_LOS DPLL_FREQ_SOFT_LIMT[6:0] DPLL_FREQ_HARD_LIMT[7:0] DPLL_FREQ_HARD_LIMT[15:8] CURRENT_PH_DATA[7:0] CURRENT_PH_DATA[15:8] T0_APLL_BW[1:0] - Output Configuration Registers 6D OUT1_PATH_SEL[3:0] OUT1_DIVIDER[3:0] P 119 Programming Information 62 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL Table 43: Register List and Map (Continued) Address (Hex) 6E 6F 70 71 72 73 74 Register Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Reference Page P 120 P 121 P 122 P 123 P 121 P 122 P 125 78 7A 7B 7C 7D OUT2_FREQ_CNFG - Output Clock 2 OUT2_PATH_SEL[3:0] OUT2_DIVIDER[3:0] Frequency Configuration OUT3_FREQ_CNFG - Output Clock 3 OUT3_PATH_SEL[3:0] OUT3_DIVIDER[3:0] Frequency Configuration OUT4_FREQ_CNFG - Output Clock 4 OUT4_PATH_SEL[3:0] OUT4_DIVIDER[3:0] Frequency Configuration OUT5_FREQ_CNFG - Output Clock 5 OUT5_PATH_SEL[3:0] OUT5_DIVIDER[3:0] Frequency Configuration OUTPUT_INV2 - Output Clock 4 & 5 OUT5_INV OUT4_INV Invert Configuration OUTPUT_INV1 - Output Clock 1 ~ 3 OUT3_INV OUT2_INV OUT1_INV Invert Configuration FR_MFR_SYNC_CNFG - Frame Sync 2K_8K_PU IN_2K_4K_ & Multiframe Sync Output Configura8K_EN 2K_EN L_POSITI 8K_INV 8K_PUL 2K_INV 2K_PUL 8K_INV tion ON PBO & Phase Offset Control Registers PHASE_MON_PBO_CNFG - Phase IN_NOISE PH_MON_ PH_MON_ Transient Monitor & PBO ConfiguraPH_TR_MON_LIMT[3:0] _WINDOW EN PBO_EN tion PHASE_OFFSET[7:0]_CNFG - Phase PH_OFFSET[7:0] Offset Configuration 1 PHASE_OFFSET[9:8]_CNFG - Phase PH_OFFS PH_OFFSET[9:8] Offset Configuration 2 ET_EN Synchronization Configuration Registers SYNC_MONITOR_CNFG - Sync MonSYNC_MON_LIMT[2:0] itor Configuration SYNC_PHASE_CNFG - Sync Phase SYNC_PH1[1:0] Configuration P 126 P 126 P 127 P 128 P 128 7.2 7.2.1 REGISTER DESCRIPTION GLOBAL CONTROL REGISTERS ID[7:0] - Device ID 1 Address: 00H Type: Read Default Value: 10001000 7 ID7 Bit 7-0 Name ID[7:0] Refer to the description of the ID[15:8] bits (b7~0, 01H). 6 ID6 5 ID5 4 ID4 3 ID3 Description 2 ID2 1 ID1 0 ID0 Programming Information 63 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL ID[15:8] - Device ID 2 Address: 01H Type: Read Default Value: 00010001 7 ID15 Bit 7-0 6 ID14 Name ID[15:8] 5 ID13 4 ID12 3 ID11 Description The value in the ID[15:0] bits are pre-set, representing the identification number for the IDT82V3385. 2 ID10 1 ID9 0 ID8 MPU_PIN_STS - MPU_MODE[2:0] Pins Status Address: 02H Type: Read Default Value: XXXXXXXX 7 Bit 7-3 2-0 Name 6 5 4 3 2 MPU_PIN_STS2 Description 1 MPU_PIN_STS1 0 MPU_PIN_STS0 Reserved. These bits indicate the value of the MPU_MODE[2:0] pins. MPU_PIN_STS[2:0] The default value of these bits is determined by the MPU_MODE[2:0] pins during reset. NOMINAL_FREQ[7:0]_CNFG - Crystal Oscillator Frequency Offset Calibration Configuration 1 Address: 04H Type: Read / Write Default Value: 00000000 7 NOMINAL_FRE Q_VALUE7 Bit 7-0 6 NOMINAL_FRE Q_VALUE6 Name 5 NOMINAL_FRE Q_VALUE5 4 NOMINAL_FRE Q_VALUE4 3 NOMINAL_FRE Q_VALUE3 2 NOMINAL_FRE Q_VALUE2 1 NOMINAL_FRE Q_VALUE1 0 NOMINAL_FRE Q_VALUE0 Description NOMINAL_FREQ_VALUE[7:0] Refer to the description of the NOMINAL_FREQ_VALUE[23:16] bits (b7~0, 06H). NOMINAL_FREQ[15:8]_CNFG - Crystal Oscillator Frequency Offset Calibration Configuration 2 Address: 05H Type: Read / Write Default Value: 00000000 7 NOMINAL_FRE Q_VALUE15 Bit 7-0 6 NOMINAL_FRE Q_VALUE14 Name 5 NOMINAL_FRE Q_VALUE13 4 NOMINAL_FRE Q_VALUE12 3 NOMINAL_FRE Q_VALUE11 2 NOMINAL_FRE Q_VALUE10 1 NOMINAL_FRE Q_VALUE9 0 NOMINAL_FRE Q_VALUE8 Description NOMINAL_FREQ_VALUE[15:8] Refer to the description of the NOMINAL_FREQ_VALUE[23:16] bits (b7~0, 06H). Programming Information 64 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL NOMINAL_FREQ[23:16]_CNFG - Crystal Oscillator Frequency Offset Calibration Configuration 3 Address: 06H Type: Read / Write Default Value: 00000000 7 NOMINAL_FRE Q_VALUE23 Bit 6 NOMINAL_FRE Q_VALUE22 Name 5 NOMINAL_FRE Q_VALUE21 4 NOMINAL_FRE Q_VALUE20 3 NOMINAL_FRE Q_VALUE19 2 NOMINAL_FRE Q_VALUE18 1 NOMINAL_FRE Q_VALUE17 0 NOMINAL_FRE Q_VALUE16 Description 7-0 The NOMINAL_FREQ_VALUE[23:0] bits represent a 2's complement signed integer. If the value is multiplied by 0.0000884, the calibration value for the master clock in ppm will be gotten. For example, the frequency offset on OSCI is +3 ppm. Though -3 ppm should be compensated, the calibration value is NOMINAL_FREQ_VALUE[23:16] calculated as +3 ppm: 3 / 0.0000884 = 33937 (Dec.) = 8490 (Hex); So `008490' should be written into these bits. The calibration range is within 741 ppm. T4_T0_REG_SEL_CNFG - T0 / T4 Registers Selection Configuration Address: 07H Type: Read / Write Default Value: XXX0XXXX 7 Bit 7-5 4 3-0 Name T4_T0_SEL 6 5 4 T4_T0_SEL 3 Description Reserved. A part of the registers are shared by T0 and T4 paths. These registers are addressed 27H, 28H, 2BH, 4EH, 4FH, 5AH, 5BH, 62H ~ 64H, 68H and 69H. This bit determines whether the register configuration is available for T0 or T4 path. 0: T0 path (default). 1: T4 path. Reserved. 2 1 0 - Programming Information 65 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL PHASE_ALARM_TIME_OUT_CNFG - Phase Lock Alarm Time-Out Configuration Address: 08H Type: Read / Write Default Value: 00110010 7 MULTI_FACTO R1 Bit 6 MULTI_FACTO R0 Name 5 TIME_OUT_VA LUE5 4 TIME_OUT_VA LUE4 3 TIME_OUT_VA LUE3 2 TIME_OUT_VA LUE2 1 TIME_OUT_VA LUE1 0 TIME_OUT_VAL UE0 Description 7-6 5-0 These bits determine a factor which has a relationship with a period in seconds. A phase lock alarm will be raised if the T0 selected input clock is not locked in T0 DPLL within this period. If the PH_ALARM_TIMEOUT bit (b5, 09H) is `1', the phase lock alarm will be cleared after this period (starting from when the alarm is raised). Refer to the description of the TIME_OUT_VALUE[5:0] bits (b5~0, 08H). MULTI_FACTOR[1:0] 00: 2 (default) 01: 4 10: 8 11: 16 These bits represent an unsigned integer. If the value in these bits is multiplied by the value in the MULTI_FACTOR[1:0] bits (b7~6, 08H), a period in seconds will be gotten. TIME_OUT_VALUE[5:0] A phase lock alarm will be raised if the T0 selected input clock is not locked in T0 DPLL within this period. If the PH_ALARM_TIMEOUT bit (b5, 09H) is `1', the phase lock alarm will be cleared after this period (starting from when the alarm is raised). Programming Information 66 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL INPUT_MODE_CNFG - Input Mode Configuration Address: 09H Type: Read / Write Default Value: 10100XX0 7 AUTO_EXT_SY NC_EN Bit 7 6 EXT_SYNC_EN 5 PH_ALARM_TI MEOUT 4 SYNC_FREQ1 3 SYNC_FREQ0 2 IN_SONET_SD H 1 MASTER_SLAV E 0 REVERTIVE_M ODE Name Description AUTO_EXT_SYNC_EN Refer to the description of the EXT_SYNC_EN bit (b6, 09H). This bit, together with the AUTO_EXT_SYNC_EN bit (b7, 09H), determines whether EX_SYNC1 is enabled to synchronize the frame sync output signals. AUTO_EXT_SYNC_EN don't-care 0 1 EXT_SYNC_EN 0 1 1 Synchronization Disabled (default) Enabled Enabled if the T0 selected input clock is IN5; otherwise, disabled. 6 EXT_SYNC_EN 5 4-3 2 1 0 This bit determines how to clear the phase lock alarm. 0: The phase lock alarm will be cleared when a `1' is written to the corresponding INn_PH_LOCK_ALARM bit (b4/0, 44H & PH_ALARM_TIMEOUT 45H & 48H). 1: The phase lock alarm will be cleared after a period (= TIME_OUT_VALUE[5:0] (b5~0, 08H) X MULTI_FACTOR[1:0] (b7~6, 08H) in seconds) which starts from when the alarm is raised. (default) These bits set the frequency of the frame sync signal input on the EX_SYNC1 pin. 00: 8 kHz (default) SYNC_FREQ[1:0] 01: 8 kHz. 10: 4 kHz. 11: 2 kHz. This bit selects the SDH or SONET network type. 0: SDH. The DPLL required clock is 2.048 MHz when the IN_FREQ[3:0] bits (b3~0, 16H & 17H & 19H) are `0001'; the T0/T4 DPLL output from the 16E1/16T1 path is 16E1. IN_SONET_SDH 1: SONET. The DPLL required clock is 1.544 MHz when the IN_FREQ[3:0] bits (b3~0, 16H & 17H & 19H) are `0001'; the T0/ T4 DPLL output from the 16E1/16T1 path is 16T1. The default value of this bit is determined by the SONET/SDH pin during reset. This bit is read only. It indicates the value of the MS/SL pin. MASTER_SLAVE Its default value is determined by the MS/SL pin during reset. This bit selects Revertive or Non-Revertive switch for T0 path. REVERTIVE_MODE 0: Non-Revertive switch. (default) 1: Revertive switch. Programming Information 67 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL DIFFERENTIAL_IN_OUT_OSCI_CNFG - Differential Input / Output Port & Master Clock Configuration Address: 0AH Type: Read / Write Default Value: XXXXX001 7 Bit 7-3 2 6 Name Reserved. This bit selects a better active edge of the master clock. OSC_EDGE 0: The rising edge. (default) 1: The falling edge. This bit selects a port technology for OUT5. OUT5_PECL_LVDS 0: LVDS. (default) 1: PECL. This bit selects a port technology for OUT4. OUT4_PECL_LVDS 0: LVDS. 1: PECL. (default) 5 4 3 2 OSC_EDGE Description 1 OUT5_PECL_LVDS 0 OUT4_PECL_LVDS 1 0 Programming Information 68 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL MON_SW_PBO_CNFG - Frequency Monitor, Input Clock Selection & PBO Control Address: 0BH Type: Read / Write Default Value: 100X01X1 7 FREQ_MON_C LK Bit 7 6 LOS_FLAG_TO _TDO Name FREQ_MON_CLK 5 ULTR_FAST_SW 4 EXT_SW 3 PBO_FREZ 2 PBO_EN 1 0 FREQ_MON_H ARD_EN Description 6 5 4 3 2 1 0 The bit selects a reference clock for input clock frequency monitoring. 0: The output of T0 DPLL. 1: The master clock. (default) The bit determines whether the interrupt of T0 selected input clock fail - is reported by the TDO pin. 0: Not reported. TDO pin is used as JTAG test data output which complies with IEEE 1149.1. (default) LOS_FLAG_TO_TDO 1: Reported. TDO pin mimics the state of the T0_MAIN_REF_FAILED bit (b6, 0EH) and does not strictly comply with IEEE 1149.1. This bit determines whether the T0 selected input clock is valid when missing 2 consecutive clock cycles or more. ULTR_FAST_SW 0: Valid. (default) 1: Invalid. This bit determines the T0 input clock selection. 0: Forced selection or Automatic selection, as controlled by the T0_INPUT_SEL[3:0] bits (b3~0, 50H). EXT_SW 1: External Fast selection. The default value of this bit is determined by the FF_SRCSW pin during reset. This bit is valid only when the PBO is enabled by the PBO_EN bit (b2, 0BH). It determines whether PBO is frozen at the current phase offset when a PBO event is triggered. PBO_FREZ 0: Not frozen. (default) 1: Frozen. Further PBO events are ignored and the current phase offset is maintained. This bit determines whether PBO is enabled when the T0 selected input clock switch or the T0 DPLL exiting from Holdover mode or Free-Run mode occurs. PBO_EN 0: Disabled. 1: Enabled. (default) Reserved. This bit determines whether the frequency hard alarm is enabled when the frequency of the input clock with respect to the reference clock is above the frequency hard alarm threshold. The reference clock can be the output of T0 DPLL or the masFREQ_MON_HARD_EN ter clock, as determined by the FREQ_MON_CLK bit (b7, 0BH). 0: Disabled. 1: Enabled. (default) Programming Information 69 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL MS_SL_CTRL_CNFG - Master Slave Control Address: 13H Type: Read / Write Default Value: XXXXXXX0 7 Bit 7-1 Name Reserved. This bit, together with the MS/SL pin, controls whether the device is configured as the Master or as the Slave. Master/Slave Control MS/SL pin 0 MS_SL_CTRL High Low The default value of this bit is `0'. MS_SL_CTRL Bit 0 1 0 1 Result Master Slave Slave Master 6 5 4 3 Description 2 1 0 MS_SL_CTRL PROTECTION_CNFG - Register Protection Mode Configuration Address: 7EH Type: Read / Write Default Value: 10000101 7 PROTECTION_ DATA7 Bit 6 PROTECTION_ DATA6 Name 5 PROTECTION_ DATA5 4 PROTECTION_ DATA4 3 PROTECTION_ DATA3 2 PROTECTION_ DATA2 1 PROTECTION_ DATA1 0 PROTECTION_ DATA0 Description 7-0 These bits select a register write protection mode. 00000000 - 10000100, 10000111 - 11111111: Protected mode. No other registers can be written except this register. PROTECTION_DATA[7:0] 10000101: Fully Unprotected mode. All the writable registers can be written. (default) 10000110: Single Unprotected mode. One more register can be written besides this register. After write operation (not including writing a `1' to clear the bit to `0'), the device automatically switches to Protected mode. Programming Information 70 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL MPU_SEL_CNFG - Microprocessor Interface Mode Configuration Address: 7FH Type: Read / Write Default Value: XXXXXXXX 7 Bit 7-3 6 Name 5 4 3 2 MPU_SEL_CNFG2 Description 1 MPU_SEL_CNFG1 0 MPU_SEL_CNFG0 2-0 Reserved. These bits select a microprocessor interface mode: 000: Reserved. 001: ERPOM mode. 010: Multiplexed mode. MPU_SEL_CNFG[2:0] 011: Intel mode. 100: Motorola mode. 101: Serial mode. 110, 111: Reserved. The default value of these bits are determined by the MPU_MODE[2:0] pins during reset. Programming Information 71 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL 7.2.2 INTERRUPT REGISTERS INTERRUPT_CNFG - Interrupt Configuration Address: 0CH Type: Read / Write Default Value: XXXXXX10 7 Bit 7-2 1 Name HZ_EN 6 5 4 3 Description Reserved. This bit determines the output characteristics of the INT_REQ pin. 0: The output on the INT_REQ pin is high/low when the interrupt is active; the output is the opposite when the interrupt is inactive. 1: The output on the INT_REQ pin is high/low when the interrupt is active; the output is in high impedance state when the interrupt is inactive. (default) This bit determines the active level on the INT_REQ pin for an active interrupt indication. 0: Active low. (default) 1: Active high. 2 1 HZ_EN 0 INT_POL 0 INT_POL INTERRUPTS1_STS - Interrupt Status 1 Address: 0DH Type: Read / Write Default Value: 11111111 7 Bit 7-6 Name 6 5 IN4 4 IN3 3 IN2 Description Reserved. This bit indicates the validity changes (from `valid' to `invalid' or from `invalid' to `valid') for the corresponding INn; i.e., whether there is a transition (from `0' to `1' or from `1' to `0') on the corresponding INn bit (b5~2, 4AH). Here n is any one of 4 to 1. 0: Has not changed. 1: Has changed. (default) This bit is cleared by writing a `1'. Reserved. 2 IN1 1 0 - 5-2 INn 1-0 - Programming Information 72 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL INTERRUPTS2_STS - Interrupt Status 2 Address: 0EH Type: Read / Write Default Value: 00111111 7 T0_OPERATING _MODE Bit 6 T0_MAIN_REF_F AILED Name 5 4 3 Description 2 IN5 1 0 - 7 6 5-3 2 1-0 This bit indicates the operating mode switch for T0 DPLL; i.e., whether the value in the T0_DPLL_OPERATING_MODE[2:0] bits (b2~0, 52H) changes. T0_OPERATING_MODE 0: Has not switched. (default) 1: Has switched. This bit is cleared by writing a `1'. This bit indicates whether the T0 selected input clock has failed. The T0 selected input clock fails when its validity changes from `valid' to `invalid'; i.e., when there is a transition from `1' to `0' on the corresponding INn bit (4AH, 4BH). T0_MAIN_REF_FAILED 0: Has not failed. (default) 1: Has failed. This bit is cleared by writing a `1'. Reserved. This bit indicates the validity changes (from `valid' to `invalid' or from `invalid' to `valid') for IN5 for T0 path, i.e., whether there is a transition (from `0' to `1' or from `1' to `0') on IN5 bit (b2, 4BH). IN5 0: Has not changed. 1: Has changed. (default) This bit is cleared by writing a `1'. Reserved. Programming Information 73 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL INTERRUPTS3_STS - Interrupt Status 3 Address: 0FH Type: Read / Write Default Value: 11X10000 7 EX_SYNC_ALARM Bit 6 T4_STS Name 5 4 INPUT_TO_T4 3 Description 2 1 0 - 7 6 5 4 3-0 This bit indicates whether an external sync alarm is raised; i.e., whether there is a transition from `0' to `1' on the EX_SYNC_ALARM_MON bit (b7, 52H). EX_SYNC_ALARM 0: Not raised. 1: Raised. (default) This bit is cleared by writing a `1'. This bit indicates the T4 DPLL locking status changes (from `locked' to `unlocked' or from `unlocked' to `locked'); i.e., whether there is a transition (from `0' to `1' or from `1' to `0') on the T4_DPLL_LOCK bit (b6, 52H). T4_STS 0: Has not changed. 1: Has changed. (default) This bit is cleared by writing a `1'. Reserved. This bit indicates whether all the input clocks for T4 path change to be unqualified; i.e., whether the HIGHEST_PRIORITY_VALIDATED[3:0] bits (b7~4, 4EH) are set to `0000' when these bits are available for T4 path. INPUT_TO_T4 0: Has not changed. 1: Has changed. (default) This bit is cleared by writing a `1'. Reserved. INTERRUPTS1_ENABLE_CNFG - Interrupt Control 1 Address: 10H Type: Read / Write Default Value: 00000000 7 Bit 7-6 5-2 0 -1 Name INn 6 5 IN4 4 IN3 3 IN2 Description Reserved. This bit controls whether the interrupt is enabled to be reported on the INT_REQ pin when the input clock validity changes (from `valid' to `invalid' or from `invalid' to `valid'), i.e., when the corresponding INn bit (b5~2, 0DH) is `1'. Here n is any one of 4 to 1. 0: Disabled. (default) 1: Enabled. Reserved 2 IN1 1 0 - Programming Information 74 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL INTERRUPTS2_ENABLE_CNFG - Interrupt Control 2 Address: 11H Type: Read / Write Default Value: 00000000 7 T0_OPERATING _MODE Bit 7 6 T0_MAIN_REF_F AILED Name 5 4 3 Description 2 IN5 1 0 - 6 5-3 2 1-0 This bit controls whether the interrupt is enabled to be reported on the INT_REQ pin when the T0 DPLL operating mode switches, i.e., when the T0_OPERATING_MODE bit (b7, 0EH) is `1'. T0_OPERATING_MODE 0: Disabled. (default) 1: Enabled. This bit controls whether the interrupt is enabled to be reported on the INT_REQ pin when the T0 selected input clock has failed; i.e., when the T0_MAIN_REF_FAILED bit (b6, 0EH) is `1'. T0_MAIN_REF_FAILED 0: Disabled. (default) 1: Enabled. Reserved. This bit controls whether the interrupt is enabled to be reported on the INT_REQ pin when the input clock validity changes (from `valid' to `invalid' or from `invalid' to `valid'), i.e., when IN5 bit (b2, 0EH) is `1'. IN5 0: Disabled. (default) 1: Enabled. Reserved. INTERRUPTS3_ENABLE_CNFG - Interrupt Control 3 Address: 12H Type: Read / Write Default Value: 00X00000 7 EX_SYNC_ALARM Bit 7 6 T4_STS Name 5 4 INPUT_TO_T4 3 Description 2 1 0 - 6 5 4 3-0 This bit controls whether the interrupt is enabled to be reported on the INT_REQ pin when an external sync alarm has occurred, i.e., when the EX_SYNC_ALARM bit (b7, 0FH) is `1'. EX_SYNC_ALARM 0: Disabled. (default) 1: Enabled. This bit controls whether the interrupt is enabled to be reported on the INT_REQ pin when the T4 DPLL locking status changes (from `locked' to `unlocked' or from `unlocked' to `locked'), i.e., when the T4_STS bit (b6, 0FH) is `1'. T4_STS 0: Disabled. (default) 1: Enabled. Reserved. This bit controls whether the interrupt is enabled to be reported on the INT_REQ pin when all the input clocks for T4 path become unqualified, i.e., when the INPUT_TO_T4 bit (b4, 0FH) is `1'. INPUT_TO_T4 0: Disabled. (default) 1: Enabled. Reserved. Programming Information 75 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL 7.2.3 INPUT CLOCK FREQUENCY & PRIORITY CONFIGURATION REGISTERS IN1_CNFG - Input Clock 1 Configuration Address: 16H Type: Read / Write Default Value: 00000000 7 DIRECT_DIV Bit 7 6 LOCK_8K Name DIRECT_DIV 5 BUCKET_SEL1 4 BUCKET_SEL0 3 IN_FREQ3 2 IN_FREQ2 1 IN_FREQ1 0 IN_FREQ0 Description Refer to the description of the LOCK_8K bit (b6, 16H). This bit, together with the DIRECT_DIV bit (b7, 16H), determines whether the DivN Divider or the Lock 8k Divider is used for IN1: DIRECT_DIV bit LOCK_8K bit 0 1 0 1 Used Divider Both bypassed (default) Lock 8k Divider DivN Divider Reserved 6 LOCK_8K 0 0 1 1 5-4 3-0 These bits select one of the four groups of leaky bucket configuration registers for IN1: 00: Group 0; the addresses of the configuration registers are 31H ~ 34H. (default) BUCKET_SEL[1:0] 01: Group 1; the addresses of the configuration registers are 35H ~ 38H. 10: Group 2; the addresses of the configuration registers are 39H ~ 3CH. 11: Group 3; the addresses of the configuration registers are 3DH ~ 40H. These bits set the DPLL required frequency for IN1: 0000: 8 kHz. (default) 0001: 1.544 MHz (when the IN_SONET_SDH bit (b2, 09H) is `1') / 2.048 MHz (when the IN_SONET_SDH bit (b2, 09H) is `0'). 0010: 6.48 MHz. 0011: 19.44 MHz. 0100: 25.92 MHz. IN_FREQ[3:0] 0101: 38.88 MHz. 0110 ~ 1000: Reserved. 1001: 2 kHz. 1010: 4 kHz. 1011 ~ 1111: Reserved. For IN1, the required frequency should not be set higher than that of the input clock. Programming Information 76 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL IN2_CNFG - Input Clock 2 Configuration Address: 17H Type: Read / Write Default Value: 00000000 7 DIRECT_DIV Bit 7 6 LOCK_8K Name DIRECT_DIV 5 BUCKET_SEL1 4 BUCKET_SEL0 3 IN_FREQ3 2 IN_FREQ2 1 IN_FREQ1 0 IN_FREQ0 Description Refer to the description of the LOCK_8K bit (b6, 17H). This bit, together with the DIRECT_DIV bit (b7, 17H), determines whether the DivN Divider or the Lock 8k Divider is used for IN2: DIRECT_DIV bit LOCK_8K bit 0 1 0 1 Used Divider Both bypassed (default) Lock 8k Divider DivN Divider Reserved 6 LOCK_8K 0 0 1 1 5-4 3-0 These bits select one of the four groups of leaky bucket configuration registers for IN2: 00: Group 0; the addresses of the configuration registers are 31H ~ 34H. (default) BUCKET_SEL[1:0] 01: Group 1; the addresses of the configuration registers are 35H ~ 38H. 10: Group 2; the addresses of the configuration registers are 39H ~ 3CH. 11: Group 3; the addresses of the configuration registers are 3DH ~ 40H. These bits set the DPLL required frequency for IN2 0000: 8 kHz. (default) 0001: 1.544 MHz (when the IN_SONET_SDH bit (b2, 09H) is `1') / 2.048 MHz (when the IN_SONET_SDH bit (b2, 09H) is `0'). 0010: 6.48 MHz. 0011: 19.44 MHz. 0100: 25.92 MHz. IN_FREQ[3:0] 0101: 38.88 MHz. 0110 ~ 1000: Reserved. 1001: 2 kHz. 1010: 4 kHz. 1011 ~ 1111: Reserved. For the IN2, the required frequency should not be set higher than that of the input clock. Programming Information 77 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL IN3_IN4_HF_DIV_CNFG - Input Clock 3 & 4 High Frequency Divider Configuration Address: 18H Type: Read / Write Default Value: 00XXXX00 7 IN4_DIV1 Bit 6 IN4_DIV0 Name 5 4 3 Description These bits determine whether the HF Divider is used and what the division factor is for IN4 frequency division: 00: Bypassed. (default) 01: Divided by 4. 10: Divided by 5. 11: Reserved. Reserved. These bits determine whether the HF Divider is used and what the division factor is for IN3 frequency division: 00: Bypassed. (default) 01: Divided by 4. 10: Divided by 5. 11: Reserved. 2 1 IN3_DIV1 0 IN3_DIV0 7-6 IN4_DIV[1:0] 5-2 - 1-0 IN3_DIV[1:0] Programming Information 78 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL IN3_CNFG - Input Clock 3 Configuration Address: 19H Type: Read / Write Default Value: 00000011 7 DIRECT_DIV Bit 7 6 LOCK_8K Name DIRECT_DIV 5 BUCKET_SEL1 4 BUCKET_SEL0 3 IN_FREQ3 2 IN_FREQ2 1 IN_FREQ1 0 IN_FREQ0 Description Refer to the description of the LOCK_8K bit (b6, 19H). This bit, together with the DIRECT_DIV bit (b7, 19H), determines whether the DivN Divider or the Lock 8k Divider is used for IN3: DIRECT_DIV bit LOCK_8K bit 0 1 0 1 Used Divider Both bypassed (default) Lock 8k Divider DivN Divider Reserved 6 LOCK_8K 0 0 1 1 5-4 3-0 These bits select one of the four groups of leaky bucket configuration registers for IN3: 00: Group 0; the addresses of the configuration registers are 31H ~ 34H. (default) BUCKET_SEL[1:0] 01: Group 1; the addresses of the configuration registers are 35H ~ 38H. 10: Group 2; the addresses of the configuration registers are 39H ~ 3CH. 11: Group 3; the addresses of the configuration registers are 3DH ~ 40H. These bits set the DPLL required frequency for IN3: 0000: 8 kHz. 0001: 1.544 MHz (when the IN_SONET_SDH bit (b2, 09H) is `1') / 2.048 MHz (when the IN_SONET_SDH bit (b2, 09H) is `0'). 0010: 6.48 MHz. 0011: 19.44 MHz. (default) 0100: 25.92 MHz. IN_FREQ[3:0] 0101: 38.88 MHz. 0110 ~ 1000: Reserved. 1001: 2 kHz. 1010: 4 kHz. 1011 ~ 1111: Reserved. The required frequency should not be set higher than that of the input clock. Programming Information 79 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL IN4_CNFG - Input Clock 4 Configuration Address: 1AH Type: Read / Write Default Value: 00000011 7 DIRECT_DIV Bit 7 6 LOCK_8K Name DIRECT_DIV 5 BUCKET_SEL1 4 BUCKET_SEL0 3 IN_FREQ3 2 IN_FREQ2 1 IN_FREQ1 0 IN_FREQ0 Description Refer to the description of the LOCK_8K bit (b6, 1AH). This bit, together with the DIRECT_DIV bit (b7, 1AH), determines whether the DivN Divider or the Lock 8k Divider is used for IN4: DIRECT_DIV bit LOCK_8K bit 0 1 0 1 Used Divider Both bypassed (default) Lock 8k Divider DivN Divider Reserved 6 LOCK_8K 0 0 1 1 5-4 3-0 These bits select one of the four groups of leaky bucket configuration registers for IN4 00: Group 0; the addresses of the configuration registers are 31H ~ 34H. (default) BUCKET_SEL[1:0] 01: Group 1; the addresses of the configuration registers are 35H ~ 38H. 10: Group 2; the addresses of the configuration registers are 39H ~ 3CH. 11: Group 3; the addresses of the configuration registers are 3DH ~ 40H. These bits set the DPLL required frequency for IN4: 0000: 8 kHz. 0001: 1.544 MHz (when the IN_SONET_SDH bit (b2, 09H) is `1') / 2.048 MHz (when the IN_SONET_SDH bit (b2, 09H) is `0'). 0010: 6.48 MHz. 0011: 19.44 MHz. (default) 0100: 25.92 MHz. IN_FREQ[3:0] 0101: 38.88 MHz. 0110 ~ 1000: Reserved. 1001: 2 kHz. 1010: 4 kHz. 1011 ~ 1111: Reserved. For IN4, the required frequency should not be set higher than that of the input clock. Programming Information 80 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL IN5_CNFG - Input Clock 5 Configuration Address: 1FH Type: Read / Write Default Value: 0000XXXX 7 DIRECT_DIV Bit 7 6 LOCK_8K Name DIRECT_DIV 5 BUCKET_SEL1 4 BUCKET_SEL0 3 IN_FREQ3 2 IN_FREQ2 1 IN_FREQ1 0 IN_FREQ0 Description Refer to the description of the LOCK_8K bit (b6, 1FH). This bit, together with the DIRECT_DIV bit (b7, 1FH), determines whether the DivN Divider or the Lock 8k Divider is used for IN5: DIRECT_DIV bit LOCK_8K bit 0 1 0 1 Used Divider Both bypassed (default) Lock 8k Divider DivN Divider Reserved 6 LOCK_8K 0 0 1 1 5-4 3-0 These bits select one of the four groups of leaky bucket configuration registers for IN5: 00: Group 0; the addresses of the configuration registers are 31H ~ 34H. (default) BUCKET_SEL[1:0] 01: Group 1; the addresses of the configuration registers are 35H ~ 38H. 10: Group 2; the addresses of the configuration registers are 39H ~ 3CH. 11: Group 3; the addresses of the configuration registers are 3DH ~ 40H. These bits set the DPLL required frequency for IN5: 0000: 8 kHz. 0001: 1.544 MHz (when the IN_SONET_SDH bit (b2, 09H) is `1') / 2.048 MHz (when the IN_SONET_SDH bit (b2, 09H) is `0'). 0010: 6.48 MHz. 0011: 19.44 MHz. 0100: 25.92 MHz. 0101: 38.88 MHz. IN_FREQ[3:0] 0110 ~ 1000: Reserved. 1001: 2 kHz. 1010: 4 kHz. 1011 ~ 1111: Reserved. For IN5, the required frequency should not be set higher than that of the input clock. The default value of these bits depends on the device application as follows: In Master / Slave application, when the device is configured as the Master, the default value is `0001'; when the device is configured as the Slave, the default value is `0010'. Programming Information 81 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL PRE_DIV_CH_CNFG - DivN Divider Channel Selection Address: 23H Type: Read / Write Default Value: XXXX0000 7 Bit 7-4 6 5 Name 4 3 PRE_DIV_CH_VALUE3 2 PRE_DIV_CH_VALUE2 1 PRE_DIV_CH_VALUE1 0 PRE_DIV_CH_VALUE0 Description 3-0 Reserved. This register is an indirect address register for Register 24H and 25H. These bits select an input clock. The value set in the PRE_DIVN_VALUE[14:0] bits (25H, 24H) is available for the selected input clock. 0000: Reserved. (default) 0001, 0010: Reserved. 0011: IN1. PRE_DIV_CH_VALUE[3:0] 0100: IN2. 0101: IN3 0110: IN4 0111, 1000, 1001, 1010: Reserved 1011: IN5 1100, 1101, 1110, 1111: Reserved. PRE_DIVN[7:0]_CNFG - DivN Divider Division Factor Configuration 1 Address: 24H Type: Read / Write Default Value: 00000000 7 PRE_DIVN_VA LUE7 Bit 7-0 6 PRE_DIVN_VA LUE6 Name 5 PRE_DIVN_VA LUE5 4 PRE_DIVN_VA LUE4 3 PRE_DIVN_VA LUE3 2 PRE_DIVN_VA LUE2 1 PRE_DIVN_VA LUE1 0 PRE_DIVN_VA LUE0 Description PRE_DIVN_VALUE[7:0] Refer to the description of the PRE_DIVN_VALUE[14:8] bits (b6~0, 25H). Programming Information 82 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL PRE_DIVN[14:8]_CNFG - DivN Divider Division Factor Configuration 2 Address: 25H Type: Read / Write Default Value: X0000000 7 Bit 7 6 PRE_DIVN_VAL UE14 Name 5 PRE_DIVN_VAL UE13 4 PRE_DIVN_VAL UE12 3 PRE_DIVN_VAL UE11 2 PRE_DIVN_VAL UE10 1 PRE_DIVN_VAL UE9 0 PRE_DIVN_VAL UE8 Description Reserved. The division factor for an input clock is the value in the PRE_DIVN_VALUE[14:0] bits plus 1. The input clock is selected by the PRE_DIV_CH_VALUE[3:0] bits (b3~0, 23H). A value from `0' to `4BEF' (Hex) can be written into, corresponding to a division factor from 1 to 19440. The others are reserved. So the DivN Divider only supports an input clock whose frequency is lower than (<) 155.52 MHz. The division factor setting should observe the following order: 1. Write the lower eight bits of the division factor to the PRE_DIVN_VALUE[7:0] bits; 2. Write the higher eight bits of the division factor to the PRE_DIVN_VALUE[14:8] bits. 6-0 PRE_DIVN_VALUE[14:8] Programming Information 83 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL IN1_IN2_SEL_PRIORITY_CNFG - Input Clock 1 & 2 Priority Configuration * Address: 27H Type: Read / Write Default Value: T0 - 01010100 / T4 - 00000000 7 IN2_SEL_PRIO RITY3 Bit 6 IN2_SEL_PRIO RITY2 Name 5 IN2_SEL_PRIO RITY1 4 IN2_SEL_PRIO RITY0 3 IN1_SEL_PRIO RITY3 2 IN1_SEL_PRIO RITY2 Description These bits set the priority of the corresponding INn. Here n is 2. 0000: Disable INn for automatic selection. (T4 default) 0001: Priority 1. 0010: Priority 2. 0011: Priority 3. 0100: Priority 4. 0101: Priority 5. (T0 default) 0110: Priority 6. 0111: Priority 7. 1000: Priority 8. 1001: Priority 9. 1010: Priority 10. 1011: Priority 11. 1100: Priority 12. 1101: Priority 13. 1110: Priority 14. 1111: Priority 15. These bits set the priority of the corresponding INn. Here n is 1. 0000: Disable INn for automatic selection. (T4 default) 0001: Priority 1. 0010: Priority 2. 0011: Priority 3. 0100: Priority 4. (T0 default) 0101: Priority 5. 0110: Priority 6. 0111: Priority 7. 1000: Priority 8. 1001: Priority 9. 1010: Priority 10. 1011: Priority 11. 1100: Priority 12. 1101: Priority 13. 1110: Priority 14. 1111: Priority 15. 1 IN1_SEL_PRIO RITY1 0 IN1_SEL_PRIO RITY0 7-4 INn_SEL_PRIORITY[3:0] 3-0 INn_SEL_PRIORITY[3:0] Programming Information 84 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL IN3_IN4_SEL_PRIORITY_CNFG - Input Clock 3 & 4 Priority Configuration * Address: 28H Type: Read / Write Default Value: T0/T4 - 01110110 7 IN4_SEL_PRIO RITY3 Bit 6 IN4_SEL_PRIO RITY2 Name 5 IN4_SEL_PRIO RITY1 4 IN4_SEL_PRIO RITY0 3 IN3_SEL_PRIO RITY3 2 IN3_SEL_PRIO RITY2 Description These bits set the priority of the corresponding INn. Here n is 4. 0000: Disable INn for automatic selection. 0001: Priority 1. 0010: Priority 2. 0011: Priority 3. 0100: Priority 4. 0101: Priority 5. 0110: Priority 6. 0111: Priority 7. (default) 1000: Priority 8. 1001: Priority 9. 1010: Priority 10. 1011: Priority 11. 1100: Priority 12. 1101: Priority 13. 1110: Priority 14. 1111: Priority 15. These bits set the priority of the corresponding INn. Here n is 3. 0000: Disable INn for automatic selection. 0001: Priority 1. 0010: Priority 2. 0011: Priority 3. 0100: Priority 4. 0101: Priority 5. 0110: Priority 6. (default) 0111: Priority 7. 1000: Priority 8. 1001: Priority 9. 1010: Priority 10. 1011: Priority 11. 1100: Priority 12. 1101: Priority 13. 1110: Priority 14. 1111: Priority 15. 1 IN3_SEL_PRIO RITY1 0 IN3_SEL_PRIO RITY0 7-4 INn_SEL_PRIORITY[3:0] 3-0 INn_SEL_PRIORITY[3:0] Programming Information 85 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL IN5_SEL_PRIORITY_CNFG - Input Clock 5 Priority Configuration * Address: 2BH Type: Read / Write Default Value: 11011100 (T0 Master)/11010001 (T0 Slave) 00000000 (T4) 7 Bit 7-4 6 Name 5 4 3 IN5_SEL_PRIO RITY3 2 IN5_SEL_PRIO RITY2 1 IN5_SEL_PRIO RITY1 0 IN5_SEL_PRIO RITY0 Description 3-0 Reserved These bits set the priority of the corresponding INn. Here n is 5: 0000: Disable INn for automatic selection. (T4 default) 0001: Priority 1. (T0 Slave default) 0010: Priority 2. 0011: Priority 3. 0100: Priority 4. 0101: Priority 5. 0110: Priority 6. INn_SEL_PRIORITY[3:0] 0111: Priority 7. 1000: Priority 8. 1001: Priority 9. 1010: Priority 10. 1011: Priority 11. 1100: Priority 12. (T0 Master default) 1101: Priority 13. 1110: Priority 14. 1111: Priority 15. Programming Information 86 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL 7.2.4 INPUT CLOCK QUALITY MONITORING CONFIGURATION & STATUS REGISTERS FREQ_MON_FACTOR_CNFG - Factor of Frequency Monitor Configuration Address: 2EH Type: Read / Write Default Value: XXXX1011 7 Bit 7-4 6 Name 5 4 3 FREQ_MON_F ACTOR3 2 FREQ_MON_F ACTOR2 1 FREQ_MON_F ACTOR1 0 FREQ_MON_F ACTOR0 Description 3-0 Reserved. These bits determine a factor. The factor has a relationship with the frequency hard alarm threshold in ppm (refer to the description of the ALL_FREQ_HARD_THRESHOLD[3:0] bits (b3~0, 2FH)) and with the frequency of the input clock with respect to the master clock in ppm (refer to the description of the IN_FREQ_VALUE[7:0] bits (b7~0, 42H)). The factor represents the accuracy of the frequency monitor and should be set according to the requirements of different applications. 0000: 0.0032. 0001: 0.0064. 0010: 0.0127. 0011: 0.0257. FREQ_MON_FACTOR[3:0] 0100: 0.0514. 0101: 0.103. 0110: 0.206. 0111: 0.412. 1000: 0.823. 1001: 1.646. 1010: 3.292. 1011: 3.81. (default) 1100 - 1111: 4.6. ALL_FREQ_MON_THRESHOLD_CNFG - Frequency Monitor Threshold for All Input Clocks Configuration Address: 2FH Type: Read / Write Default Value: XXXX0011 7 Bit 7-4 6 Name 5 4 3 ALL_FREQ_HARD_ THRESHOLD3 2 ALL_FREQ_HARD_ THRESHOLD2 1 ALL_FREQ_HARD_ THRESHOLD1 0 ALL_FREQ_HARD_ THRESHOLD0 Description 3-0 Reserved. These bits represent an unsigned integer. The frequency hard alarm threshold in ppm can be calculated as follows: ALL_FREQ_HARD_THRESHOLD[3:0] Frequency Hard Alarm Threshold (ppm) = (ALL_FREQ_HARD_THRESHOLD[3:0] + 1) X FREQ_MON_FACTOR[3:0] (b3~0, 2EH) This threshold is symmetrical about zero. Programming Information 87 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL UPPER_THRESHOLD_0_CNFG - Upper Threshold for Leaky Bucket Configuration 0 Address: 31H Type: Read / Write Default Value: 00000110 7 UPPER_THRE SHOLD_0_DAT A7 Bit 7-0 6 UPPER_THRE SHOLD_0_DAT A6 Name UPPER_THRESHOLD_0_DATA[7:0] 5 UPPER_THRE SHOLD_0_DAT A5 4 UPPER_THRE SHOLD_0_DAT A4 3 UPPER_THRE SHOLD_0_DAT A3 2 UPPER_THRE SHOLD_0_DAT A2 Description These bits set an upper threshold for the internal leaky bucket accumulator. When the number of the accumulated events is above this threshold, a no-activity alarm is raised. 1 UPPER_THRE SHOLD_0_DAT A1 0 UPPER_THRE SHOLD_0_DAT A0 LOWER_THRESHOLD_0_CNFG - Lower Threshold for Leaky Bucket Configuration 0 Address: 32H Type: Read / Write Default Value: 00000100 7 LOWER_THRE SHOLD_0_DAT A7 Bit 7-0 6 LOWER_THRE SHOLD_0_DAT A6 Name LOWER_THRESHOLD_0_DATA[7:0] 5 LOWER_THRE SHOLD_0_DAT A5 4 LOWER_THRE SHOLD_0_DAT A4 3 LOWER_THRE SHOLD_0_DAT A3 2 LOWER_THRE SHOLD_0_DAT A2 Description These bits set a lower threshold for the internal leaky bucket accumulator. When the number of the accumulated events is below this threshold, the no-activity alarm is cleared. 1 LOWER_THRE SHOLD_0_DAT A1 0 LOWER_THRE SHOLD_0_DAT A0 BUCKET_SIZE_0_CNFG - Bucket Size for Leaky Bucket Configuration 0 Address: 33H Type: Read / Write Default Value: 00001000 7 BUCKET_SIZE _0_DATA7 Bit 7-0 6 BUCKET_SIZE _0_DATA6 Name BUCKET_SIZE_0_DATA[7:0] 5 BUCKET_SIZE _0_DATA5 4 BUCKET_SIZE _0_DATA4 3 BUCKET_SIZE _0_DATA3 2 BUCKET_SIZE _0_DATA2 1 BUCKET_SIZE _0_DATA1 0 BUCKET_SIZE _0_DATA0 Description These bits set a bucket size for the internal leaky bucket accumulator. If the number of the accumulated events reach the bucket size, the accumulator will stop increasing even if further events are detected. Programming Information 88 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL DECAY_RATE_0_CNFG - Decay Rate for Leaky Bucket Configuration 0 Address: 34H Type: Read / Write Default Value: XXXXXX01 7 Bit 7-2 6 Name 5 4 3 2 Description 1 DECAY_RATE_ 0_DATA1 0 DECAY_RATE_ 0_DATA0 1-0 Reserved. These bits set a decay rate for the internal leaky bucket accumulator: 00: The accumulator decreases by 1 in every 128 ms with no event detected. DECAY_RATE_0_DATA[1:0] 01: The accumulator decreases by 1 in every 256 ms with no event detected. (default) 10: The accumulator decreases by 1 in every 512 ms with no event detected. 11: The accumulator decreases by 1 in every 1024 ms with no event detected. UPPER_THRESHOLD_1_CNFG - Upper Threshold for Leaky Bucket Configuration 1 Address: 35H Type: Read / Write Default Value: 00000110 7 UPPER_THRE SHOLD_1_DAT A7 Bit 7-0 6 UPPER_THRE SHOLD_1_DAT A6 Name UPPER_THRESHOLD_1_DATA[7:0] 5 UPPER_THRE SHOLD_1_DAT A5 4 UPPER_THRE SHOLD_1_DAT A4 3 UPPER_THRE SHOLD_1_DAT A3 2 UPPER_THRE SHOLD_1_DAT A2 Description These bits set an upper threshold for the internal leaky bucket accumulator. When the number of the accumulated events is above this threshold, a no-activity alarm is raised. 1 UPPER_THRE SHOLD_1_DAT A1 0 UPPER_THRE SHOLD_1_DAT A0 LOWER_THRESHOLD_1_CNFG - Lower Threshold for Leaky Bucket Configuration 1 Address: 36H Type: Read / Write Default Value: 00000100 7 LOWER_THRE SHOLD_1_DAT A7 Bit 7-0 6 LOWER_THRE SHOLD_1_DAT A6 Name 5 LOWER_THRE SHOLD_1_DAT A5 4 LOWER_THRE SHOLD_1_DAT A4 3 LOWER_THRE SHOLD_1_DAT A3 2 LOWER_THRE SHOLD_1_DAT A2 Description 1 LOWER_THRE SHOLD_1_DAT A1 0 LOWER_THRE SHOLD_1_DAT A0 These bits set a lower threshold for the internal leaky bucket accumulator. When the number of the accumulated LOWER_THRESHOLD_1_DATA[7:0] events is below this threshold, the no-activity alarm is cleared. Programming Information 89 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL BUCKET_SIZE_1_CNFG - Bucket Size for Leaky Bucket Configuration 1 Address: 37H Type: Read / Write Default Value: 00001000 7 BUCKET_SIZE _1_DATA7 Bit 7-0 6 BUCKET_SIZE _1_DATA6 Name 5 BUCKET_SIZE _1_DATA5 4 BUCKET_SIZE _1_DATA4 3 BUCKET_SIZE _1_DATA3 2 BUCKET_SIZE _1_DATA2 Description 1 BUCKET_SIZE _1_DATA1 0 BUCKET_SIZE _1_DATA0 These bits set a bucket size for the internal leaky bucket accumulator. If the number of the accumulated events reach BUCKET_SIZE_1_DATA[7:0] the bucket size, the accumulator will stop increasing even if further events are detected. DECAY_RATE_1_CNFG - Decay Rate for Leaky Bucket Configuration 1 Address: 38H Type: Read / Write Default Value: XXXXXX01 7 Bit 7-2 6 Name 5 4 3 2 Description 1 DECAY_RATE_ 1_DATA1 0 DECAY_RATE_ 1_DATA0 1-0 Reserved. These bits set a decay rate for the internal leaky bucket accumulator: 00: The accumulator decreases by 1 in every 128 ms with no event detected. DECAY_RATE_1_DATA[1:0] 01: The accumulator decreases by 1 in every 256 ms with no event detected. (default) 10: The accumulator decreases by 1 in every 512 ms with no event detected. 11: The accumulator decreases by 1 in every 1024 ms with no event detected. UPPER_THRESHOLD_2_CNFG - Upper Threshold for Leaky Bucket Configuration 2 Address: 39H Type: Read / Write Default Value: 00000110 7 UPPER_THRE SHOLD_2_DAT A7 Bit 7-0 6 UPPER_THRE SHOLD_2_DAT A6 Name 5 UPPER_THRE SHOLD_2_DAT A5 4 UPPER_THRE SHOLD_2_DAT A4 3 UPPER_THRE SHOLD_2_DAT A3 2 UPPER_THRE SHOLD_2_DAT A2 Description 1 UPPER_THRE SHOLD_2_DAT A1 0 UPPER_THRE SHOLD_2_DAT A0 These bits set an upper threshold for the internal leaky bucket accumulator. When the number of the accumuUPPER_THRESHOLD_2_DATA[7:0] lated events is above this threshold, a no-activity alarm is raised. Programming Information 90 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL LOWER_THRESHOLD_2_CNFG - Lower Threshold for Leaky Bucket Configuration 2 Address: 3AH Type: Read / Write Default Value: 00000100 7 LOWER_THRE SHOLD_2_DAT A7 Bit 7-0 6 LOWER_THRE SHOLD_2_DAT A6 Name LOWER_THRESHOLD_2_DATA[7:0] 5 LOWER_THRE SHOLD_2_DAT A5 4 LOWER_THRE SHOLD_2_DAT A4 3 LOWER_THRE SHOLD_2_DAT A3 2 LOWER_THRE SHOLD_2_DAT A2 Description These bits set a lower threshold for the internal leaky bucket accumulator. When the number of the accumulated events is below this threshold, the no-activity alarm is cleared. 1 LOWER_THRE SHOLD_2_DAT A1 0 LOWER_THRE SHOLD_2_DAT A0 BUCKET_SIZE_2_CNFG - Bucket Size for Leaky Bucket Configuration 2 Address: 3BH Type: Read / Write Default Value: 00001000 7 BUCKET_SIZE _2_DATA7 Bit 7-0 6 BUCKET_SIZE _2_DATA6 Name BUCKET_SIZE_2_DATA[7:0] 5 BUCKET_SIZE _2_DATA5 4 BUCKET_SIZE _2_DATA4 3 BUCKET_SIZE _2_DATA3 2 BUCKET_SIZE _2_DATA2 1 BUCKET_SIZE _2_DATA1 0 BUCKET_SIZE _2_DATA0 Description These bits set a bucket size for the internal leaky bucket accumulator. If the number of the accumulated events reaches the bucket size, the accumulator will stop increasing even if further events are detected. DECAY_RATE_2_CNFG - Decay Rate for Leaky Bucket Configuration 2 Address: 3CH Type: Read / Write Default Value: XXXXXX01 7 Bit 7-2 6 Name 5 4 3 Description 2 1 DECAY_RATE_ 2_DATA1 0 DECAY_RATE_ 2_DATA0 1-0 Reserved. These bits set a decay rate for the internal leaky bucket accumulator: 00: The accumulator decreases by 1 in every 128 ms with no event detected. DECAY_RATE_2_DATA[1:0] 01: The accumulator decreases by 1 in every 256 ms with no event detected. (default) 10: The accumulator decreases by 1 in every 512 ms with no event detected. 11: The accumulator decreases by 1 in every 1024 ms with no event detected. Programming Information 91 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL UPPER_THRESHOLD_3_CNFG - Upper Threshold for Leaky Bucket Configuration 3 Address: 3DH Type: Read / Write Default Value: 00000110 7 UPPER_THRE SHOLD_3_DAT A7 Bit 7-0 6 UPPER_THRE SHOLD_3_DAT A6 Name UPPER_THRESHOLD_3_DATA[7:0] 5 UPPER_THRE SHOLD_3_DAT A5 4 UPPER_THRE SHOLD_3_DAT A4 3 UPPER_THRE SHOLD_3_DAT A3 2 UPPER_THRE SHOLD_3_DAT A2 Description These bits set an upper threshold for the internal leaky bucket accumulator. When the number of the accumulated events is above this threshold, a no-activity alarm is raised. 1 UPPER_THRE SHOLD_3_DAT A1 0 UPPER_THRE SHOLD_3_DAT A0 LOWER_THRESHOLD_3_CNFG - Lower Threshold for Leaky Bucket Configuration 3 Address: 3EH Type: Read / Write Default Value: 00000100 7 LOWER_THRE SHOLD_3_DAT A7 Bit 7-0 6 LOWER_THRE SHOLD_3_DAT A6 Name LOWER_THRESHOLD_3_DATA[7:0] 5 LOWER_THRE SHOLD_3_DAT A5 4 LOWER_THRE SHOLD_3_DAT A4 3 LOWER_THRE SHOLD_3_DAT A3 2 LOWER_THRE SHOLD_3_DAT A2 Description These bits set a lower threshold for the internal leaky bucket accumulator. When the number of the accumulated events is below this threshold, the no-activity alarm is cleared. 1 LOWER_THRE SHOLD_3_DAT A1 0 LOWER_THRE SHOLD_3_DAT A0 BUCKET_SIZE_3_CNFG - Bucket Size for Leaky Bucket Configuration 3 Address: 3FH Type: Read / Write Default Value: 00001000 7 BUCKET_SIZE _3_DATA7 Bit 7-0 6 BUCKET_SIZE _3_DATA6 Name BUCKET_SIZE_3_DATA[7:0] 5 BUCKET_SIZE _3_DATA5 4 BUCKET_SIZE _3_DATA4 3 BUCKET_SIZE _3_DATA3 2 BUCKET_SIZE _3_DATA2 1 BUCKET_SIZE _3_DATA1 0 BUCKET_SIZE _3_DATA0 Description These bits set a bucket size for the internal leaky bucket accumulator. If the number of the accumulated events reaches the bucket size, the accumulator will stop increasing even if further events are detected. Programming Information 92 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL DECAY_RATE_3_CNFG - Decay Rate for Leaky Bucket Configuration 3 Address: 40H Type: Read / Write Default Value: XXXXXX01 7 Bit 7-2 6 Name 5 4 3 Description 2 1 DECAY_RATE_ 3_DATA1 0 DECAY_RATE_ 3_DATA0 1-0 Reserved. These bits set a decay rate for the internal leaky bucket accumulator: 00: The accumulator decreases by 1 in every 128 ms with no event detected. DECAY_RATE_3_DATA[1:0] 01: The accumulator decreases by 1 in every 256 ms with no event detected. (default) 10: The accumulator decreases by 1 in every 512 ms with no event detected. 11: The accumulator decreases by 1 in every 1024 ms with no event detected. IN_FREQ_READ_CH_CNFG - Input Clock Frequency Read Channel Selection Address: 41H Type: Read / Write Default Value: XXXX0000 7 Bit 7-4 6 Name 5 4 3 IN_FREQ_READ _CH3 2 IN_FREQ_READ _CH2 Description 1 IN_FREQ_READ _CH1 0 IN_FREQ_READ _CH0 3-0 Reserved. These bits select an input clock, the frequency of which with respect to the reference clock can be read. 0000: Reserved. (default) 0001, 0010: Reserved. 0011: IN1. 0100: IN2. IN_FREQ_READ_CH[3:0] 0101: IN3. 0110: IN4. 0111, 1000, 1001, 1010: Reserved. 1011: IN5. 1100, 1101, 1110, 1111: Reserved. Programming Information 93 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL IN_FREQ_READ_STS - Input Clock Frequency Read Value Address: 42H Type: Read Default Value: 00000000 7 IN_FREQ_VAL UE7 Bit 7-0 6 IN_FREQ_VAL UE6 Name 5 IN_FREQ_VAL UE5 4 IN_FREQ_VAL UE4 3 IN_FREQ_VAL UE3 2 IN_FREQ_VAL UE2 1 IN_FREQ_VAL UE1 0 IN_FREQ_VAL UE0 Description These bits represent a 2's complement signed integer. If the value is multiplied by the value in the FREQ_MON_FACTOR[3:0] bits (b3~0, 2EH), the frequency of an input clock with respect to the reference clock in ppm will IN_FREQ_VALUE[7:0] be gotten. The input clock is selected by the IN_FREQ_READ_CH[3:0] bits (b3~0, 41H). The value in these bits is updated every 16 seconds, starting when an input clock is selected. Programming Information 94 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL IN1_IN2_STS - Input Clock 1 & 2 Status Address: 44H Type: Read Default Value: X110X110 7 6 IN2_FREQ_HAR D_ALARM 5 IN2_NO_ACTIVI TY_ALARM 4 IN2_PH_LOCK_ ALARM 3 2 IN1_FREQ_HAR D_ALARM 1 IN1_NO_ACTIVI TY_ALARM 0 IN1_PH_LOCK_ ALARM Bit 7 6 Name IN2_FREQ_HARD_ALARM Description Reserved. This bit indicates whether IN2 is in frequency hard alarm status. 0: No frequency hard alarm. 1: In frequency hard alarm status. (default) This bit indicates whether IN2 is in no-activity alarm status. 0: No no-activity alarm. 1: In no-activity alarm status. (default) This bit indicates whether IN2 is in phase lock alarm status. 0: No phase lock alarm. (default) 1: In phase lock alarm status. If the PH_ALARM_TIMEOUT bit (b5, 09H) is `0', this bit is cleared by writing `1' to this bit; if the PH_ALARM_TIMEOUT bit (b5, 09H) is `1', this bit is cleared after a period (= TIME_OUT_VALUE[5:0] (b5~0, 08H) X MULTI_FACTOR[1:0] (b7~6, 08H) in seconds) which starts from when the alarm is raised. Reserved. This bit indicates whether IN1 is in frequency hard alarm status. 0: No frequency hard alarm. 1: In frequency hard alarm status. (default) This bit indicates whether IN1 is in no-activity alarm status. 0: No no-activity alarm. 1: In no-activity alarm status. (default) This bit indicates whether IN1 is in phase lock alarm status. 0: No phase lock alarm. (default) 1: In phase lock alarm status. If the PH_ALARM_TIMEOUT bit (b5, 09H) is `0', this bit is cleared by writing `1' to this bit; if the PH_ALARM_TIMEOUT bit (b5, 09H) is `1', this bit is cleared after a period (= TIME_OUT_VALUE[5:0] (b5~0, 08H) X MULTI_FACTOR[1:0] (b7~6, 08H) in seconds) which starts from when the alarm is raised. 5 IN2_NO_ACTIVITY_ALARM 4 IN2_PH_LOCK_ALARM 3 2 IN1_FREQ_HARD_ALARM 1 IN1_NO_ACTIVITY_ALARM 0 IN1_PH_LOCK_ALARM Programming Information 95 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL IN3_IN4_STS - Input Clock 3 & 4 Status Address: 45H Type: Read Default Value: X110X110 7 Bit 7 6 6 IN4_FREQ_HAR D_ALARM Name IN4_FREQ_HARD_ALARM 5 IN4_NO_ACTIVI TY_ALARM 4 IN4_PH_LOCK_ ALARM 3 2 IN3_FREQ_HAR D_ALARM Description Reserved. This bit indicates whether IN4 is in frequency hard alarm status. 0: No frequency hard alarm. 1: In frequency hard alarm status. (default) This bit indicates whether IN4 is in no-activity alarm status. 0: No no-activity alarm. 1: In no-activity alarm status. (default) This bit indicates whether IN4 is in phase lock alarm status. 0: No phase lock alarm. (default) 1: In phase lock alarm status. If the PH_ALARM_TIMEOUT bit (b5, 09H) is `0', this bit is cleared by writing `1' to this bit; if the PH_ALARM_TIMEOUT bit (b5, 09H) is `1', this bit is cleared after a period (= TIME_OUT_VALUE[5:0] (b5~0, 08H) X MULTI_FACTOR[1:0] (b7~6, 08H) in seconds) which starts from when the alarm is raised. Reserved. This bit indicates whether IN3 is in frequency hard alarm status. 0: No frequency hard alarm. 1: In frequency hard alarm status. (default) This bit indicates whether IN3 is in no-activity alarm status. 0: No no-activity alarm. 1: In no-activity alarm status. (default) This bit indicates whether IN3 is in phase lock alarm status. 0: No phase lock alarm. (default) 1: In phase lock alarm status. If the PH_ALARM_TIMEOUT bit (b5, 09H) is `0', this bit is cleared by writing `1' to this bit; if the PH_ALARM_TIMEOUT bit (b5, 09H) is `1', this bit is cleared after a period (= TIME_OUT_VALUE[5:0] (b5~0, 08H) X MULTI_FACTOR[1:0] (b7~6, 08H) in seconds) which starts from when the alarm is raised. 1 IN3_NO_ACTIVI TY_ALARM 0 IN3_PH_LOCK_ ALARM 5 IN4_NO_ACTIVITY_ALARM 4 IN4_PH_LOCK_ALARM 3 2 IN3_FREQ_HARD_ALARM 1 IN3_NO_ACTIVITY_ALARM 0 IN3_PH_LOCK_ALARM Programming Information 96 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL IN5_STS - Input Clock 5 Status Address: 48H Type: Read Default Value: X110X110 7 Bit 7-3 2 6 Name 5 4 3 2 IN5_FREQ_HA RD_ALARM Description 1 IN5_NO_ACTIV ITY_ALARM 0 IN5_PH_LOCK _ALARM 1 0 Reserved. This bit indicates whether IN5 is in frequency hard alarm status. IN5_FREQ_HARD_ALARM 0: No frequency hard alarm. 1: In frequency hard alarm status. (default) This bit indicates whether IN5 is in no-activity alarm status. IN5_NO_ACTIVITY_ALARM 0: No no-activity alarm. 1: In no-activity alarm status. (default) This bit indicates whether IN5 is in phase lock alarm status. 0: No phase lock alarm. (default) 1: In phase lock alarm status. IN5_PH_LOCK_ALARM If the PH_ALARM_TIMEOUT bit (b5, 09H) is `0', this bit is cleared by writing `1' to this bit; if the PH_ALARM_TIMEOUT bit (b5, 09H) is `1', this bit is cleared after a period (= TIME_OUT_VALUE[5:0] (b5~0, 08H) X MULTI_FACTOR[1:0] (b7~6, 08H) in seconds) which starts from when the alarm is raised. Programming Information 97 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL 7.2.5 T0 / T4 DPLL INPUT CLOCK SELECTION REGISTERS INPUT_VALID1_STS - Input Clocks Validity 1 Address: 4AH Type: Read Default Value: 00000000 7 Bit 7-6 5-2 1-0 Name INn 6 5 IN4 4 IN3 3 IN2 Description Reserved. This bit indicates the validity of the corresponding INn. Here n is any of 4 to 1. 0: Invalid. (default) 1: Valid. Reserved. 2 IN1 1 0 - INPUT_VALID2_STS - Input Clocks Validity 2 Address: 4BH Type: Read Default Value: XX000000 7 Bit 7-3 2 1-0 Name IN5 Reserved. This bit indicates the validity of IN5. 0: Invalid. (default) 1: Valid. Reserved. 6 5 4 3 Description 2 IN5 1 0 - REMOTE_INPUT_VALID1_CNFG - Input Clocks Validity Configuration 1 Address: 4CH Type: Read / Write Default Value: 11111111 7 Bit 7-6 5-2 1-0 Name INn_VALID 6 5 IN4_VALID 4 IN3_VALID 3 IN2_VALID Description Reserved. This bit controls whether the corresponding INn is allowed to be locked for automatic selection. Here n is any one of 4 to 1. 0: Enabled. 1: Disabled. (default) Reserved. 2 IN1_VALID 1 0 - Programming Information 98 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL REMOTE_INPUT_VALID2_CNFG - Input Clocks Validity Configuration 2 Address: 4DH Type: Read / Write Default Value: XX111111 7 Bit 7-3 2 1-0 Name IN5_VALID 6 5 4 3 Description Reserved. This bit controls whether IN5 is allowed to be locked for automatic selection. 0: Enabled. 1: Disabled. (default) Reserved. 2 IN5_VALID 1 0 - PRIORITY_TABLE1_STS - Priority Status 1 * Address: 4EH Type: Read Default Value: 00000000 7 HIGHEST_PRI ORITY_VALIDA TED3 Bit 6 HIGHEST_PRI ORITY_VALIDA TED2 Name 5 HIGHEST_PRI ORITY_VALIDA TED1 4 HIGHEST_PRI ORITY_VALIDA TED0 3 CURRENTLY_S ELECTED_INP UT3 2 CURRENTLY_S ELECTED_INP UT2 Description 1 CURRENTLY_S ELECTED_INP UT1 0 CURRENTLY_S ELECTED_INP UT0 7-4 3-0 These bits indicate a qualified input clock with the highest priority. 0000: No input clock is qualified. (default) 0001, 0010: Reserved. 0011: IN1. 0100: IN2. 0101: IN3. HIGHEST_PRIORITY_VALIDATED[3:0] 0110: IN4. 0111, 1000, 1001, 1010: Reserved. 1011: IN5. 1100, 1101, 1110, 1111: Reserved. Note that the input clock is indicated by these bits only when the corresponding INn (b5-2, 4CH) or INn (b2, 4DH) bit is `0'. These bits indicate the T0/T4 selected input clock. 0000: No input clock is selected; or the T4 selected input clock is the T0 DPLL output. (default) 0001, 0010: Reserved. 0011: IN1 is selected. 0100: IN2 is selected. 0101: IN3 is selected. CURRENTLY_SELECTED_INPUT[3:0] 0110: IN4 is selected. 0111, 1000, 1001, 1010: Reserved. 1011: IN5 is selected. 1100, 1101, 1110, 1111: Reserved. Note that the input clock is indicated by these bits only when the corresponding INn (b5-2, 4CH) or INn (b2, 4DH) bit is `0'. Programming Information 99 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL PRIORITY_TABLE2_STS - Priority Status 2 * Address: 4FH Type: Read Default Value: 00000000 7 THIRD_HIGHE ST_PRIORITY_ VALIDATED3 Bit 6 THIRD_HIGHE ST_PRIORITY_ VALIDATED2 5 THIRD_HIGHE ST_PRIORITY_ VALIDATED1 Name 4 THIRD_HIGHE ST_PRIORITY_ VALIDATED0 3 SECOND_HIGH EST_PRIORITY _VALIDATED3 2 SECOND_HIGH EST_PRIORITY _VALIDATED2 Description 1 SECOND_HIGH EST_PRIORITY _VALIDATED1 0 SECOND_HIGH EST_PRIORITY _VALIDATED0 7-4 3-0 These bits indicate a qualified input clock with the third highest priority. 0000: No input clock is qualified. (default) 0001, 0010: Reserved. 0011: IN1. 0100: IN2. 0101: IN3. THIRD_HIGHEST_PRIORITY_VALIDATED[3:0] 0110: IN4. 0111, 1000, 1001, 1010: Reserved. 1011: IN5. 1100, 1101, 1110, 1111: Reserved. Note that the input clock is indicated by these bits only when the corresponding INn (b5-2, 4CH) or INn (b2, 4DH) bit is `0'. These bits indicate a qualified input clock with the second highest priority. 0000: No input clock is qualified. (default) 0001, 0010: Reserved. 0011: IN1. 0100: IN2. 0101: IN3. SECOND_HIGHEST_PRIORITY_VALIDATED[3:0] 0110: IN4. 0111, 1000, 1001, 1010: Reserved. 1011: IN5. 1100, 1101, 1110, 1111: Reserved. Note that the input clock is indicated by these bits only when the corresponding INn (b5-2, 4CH) or INn (b2, 4DH) bit is `0'. Programming Information 100 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL T0_INPUT_SEL_CNFG - T0 Selected Input Clock Configuration Address: 50H Type: Read / Write Default Value: XXXX0000 7 Bit 7-4 6 Name 5 4 3 T0_INPUT_SEL3 2 T0_INPUT_SEL2 1 T0_INPUT_SEL1 0 T0_INPUT_SEL0 Description 3-0 Reserved. This bit determines T0 input clock selection. It is valid only when the EXT_SW bit (b4, 0BH) is `0'. 0000: Automatic selection. (default) 0001, 0010: Reserved. 0011: Forced selection - IN1 is selected. 0100: Forced selection - IN2 is selected. T0_INPUT_SEL[3:0] 0101: Forced selection - IN3 is selected. 0110: Forced selection - IN4 is selected. 0111, 1000, 1001, 1010: Reserved. 1011: Forced selection - IN5 is selected. 1100, 1101, 1110, 1111: Reserved. Programming Information 101 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL T4_INPUT_SEL_CNFG - T4 Selected Input Clock Configuration Address: 51H Type: Read / Write Default Value: X0000000 7 Bit 7 6 6 T4_LOCK_T0 Name 5 T0_FOR_T4 4 T4_TEST_T0_PH 3 T4_INPUT_SEL3 2 T4_INPUT_SEL2 1 T4_INPUT_SEL1 0 T4_INPUT_SEL0 Description 5 4 3-0 Reserved. This bit determines whether the T4 DPLL locks to a T0 DPLL output or locks independently from the T0 DPLL. T4_LOCK_T0 0: Independently from the T0 path. (default) 1: Locks to a 77.76 MHz or 8 kHz signal from the T0 DPLL 77.76 MHz path. This bit is valid only when the T4_LOCK_T0 bit (b6, 51H) is `1'. It determines whether a 77.76 MHz or 8 kHz signal from the T0 DPLL 77.76 MHz path is selected by the T4 DPLL. T0_FOR_T4 0: 77.76 MHz. (default) 1: 8 kHz. This bit determines whether T4 selected input clock is compared with the feedback signal of the T4 DPLL for T4 DPLL locking or is compared with the T0 selected input clock to get the phase difference between T0 and T4 selected input clocks. T4_TEST_T0_PH 0: The T4 DPLL output. (default) 1: The T0 selected input clock. These bits are valid only when the T4_LOCK_T0 bit (b6, 51H) is `0'. They determines the T4 DPLL input clock selection. 0000: Automatic selection. (default) 0001, 0010: Reserved. 0011: Forced selection - IN1 is selected. 0100: Forced selection - IN2 is selected. T4_INPUT_SEL[3:0] 0101: Forced selection - IN3 is selected. 0110: Forced selection - IN4 is selected. 0111, 1000, 1001, 1010: Reserved. 1011: Forced selection - IN5 is selected. 1100, 1101, 1110, 1111: Reserved. Programming Information 102 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL 7.2.6 T0 / T4 DPLL STATE MACHINE CONTROL REGISTERS OPERATING_STS - DPLL Operating Status Address: 52H Type: Read Default Value: 10000001 7 EX_SYNC_ALA RM_MON Bit 7 6 T4_DPLL_LO CK Name EX_SYNC_ALARM_MON 5 T0_DPLL_SOFT _FREQ_ALARM 4 T4_DPLL_SOFT _FREQ_ALARM 3 T0_DPLL_LO CK 2 T0_DPLL_OPER ATING_MODE2 Description 1 T0_DPLL_OPER ATING_MODE1 0 T0_DPLL_OPER ATING_MODE0 6 5 4 3 2-0 This bit indicates whether the frame sync input signal is in external sync alarm status. 0: No external sync alarm. 1: In external sync alarm status. (default) This bit indicates the T4 DPLL locking status. T4_DPLL_LOCK 0: Unlocked. (default) 1: Locked. This bit indicates whether the T0 DPLL is in soft alarm status. T0_DPLL_SOFT_FREQ_ALARM 0: No T0 DPLL soft alarm. (default) 1: In T0 DPLL soft alarm status. This bit indicates whether the T4 DPLL is in soft alarm status. T4_DPLL_SOFT_FREQ_ALARM 0: No T4 DPLL soft alarm. (default) 1: In T4 DPLL soft alarm status. This bit indicates the T0 DPLL locking status. T0_DPLL_LOCK 0: Unlocked. (default) 1: Locked. These bits indicate the current operating mode of T0 DPLL. 000: Reserved. 001: Free-Run. (default) 010: Holdover. T0_DPLL_OPERATING_MODE[2:0] 011: Reserved. 100: Locked. 101: Pre-Locked2. 110: Pre-Locked. 111: Lost-Phase. Programming Information 103 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL T0_OPERATING_MODE_CNFG - T0 DPLL Operating Mode Configuration Address: 53H Type: Read / Write Default Value: XXXXX000 7 Bit 7-3 6 Name Reserved. These bits control the T0 DPLL operating mode. 000: Automatic. (default) 001: Forced - Free-Run. 010: Forced - Holdover. T0_OPERATING_MODE[2:0] 011: Reserved. 100: Forced - Locked. 101: Forced - Pre-Locked2. 110: Forced - Pre-Locked. 111: Forced - Lost-Phase. 5 4 3 2 T0_OPERATING_MODE2 1 T0_OPERATING_MODE1 Description 0 T0_OPERATING_MODE0 2-0 T4_OPERATING_MODE_CNFG - T4 DPLL Operating Mode Configuration Address: 54H Type: Read / Write Default Value: XXXXX000 7 Bit 7-3 6 Name Reserved. These bits control the T4 DPLL operating mode. 000: Automatic. (default) 001: Forced - Free-Run. T4_OPERATING_MODE[2:0] 010: Forced - Holdover. 011: Reserved. 100: Forced - Locked. 101, 110, 111: Reserved. 5 4 3 2 T4_OPERATING_MODE2 1 T4_OPERATING_MODE1 Description 0 T4_OPERATING_MODE0 2-0 Programming Information 104 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL 7.2.7 T0 / T4 DPLL & APLL CONFIGURATION REGISTERS T0_DPLL_APLL_PATH_CNFG - T0 DPLL & APLL Path Configuration Address: 55H Type: Read / Write Default Value: 00000X0X 7 T0_APLL_PATH 3 Bit 6 T0_APLL_PA TH2 Name 5 T0_APLL_PA TH1 4 T0_APLL_PA TH0 3 T0_GSM_OBSAI_ 16E1_16T1_SEL1 2 T0_GSM_OBSAI_ 16E1_16T1_SEL0 Description 1 T0_12E1_24T1_ E3_T3_SEL1 0 T0_12E1_24T1_ E3_T3_SEL0 7-4 3-2 1-0 These bits select an input to the T0 APLL. 0000: The output of T0 DPLL 77.76 MHz path. (default) 0001: The output of T0 DPLL 12E1/24T1/E3/T3 path. 0010: The output of T0 DPLL 16E1/16T1 path. 0011: The output of T0 DPLL ETH/OBSAI/16E1/16T1 path. T0_APLL_PATH[3:0] 0100: The output of T4 DPLL 77.76 MHz path. 0101: The output of T4 DPLL 12E1/24T1/E3/T3 path. 0110: The output of T4 DPLL 16E1/16T1 path. 0111: The output of T4 DPLL ETH/GPS/16E1/16T1 path. 1XXX: Reserved. These bits select an output clock from the T0 DPLL ETH/OBSAI/16E1/16T1 path. 00: 16E1. 01: 16T1. T0_ETH_OBSAI_16E1_16T1_SEL[1:0] 10: GSM. 11: OBSAI. The default value of the T0_ETH_OBSAI_16E1_16T1_SEL0 bit is determined by the SONET/SDH pin during reset. These bits select an output clock from the T0 DPLL 12E1/24T1/E3/T3 path. 00: 12E1. 01: 24T1. T0_12E1_24T1_E3_T3_SEL[1:0] 10: E3. 11: T3. The default value of the T0_12E1_24T1_E3_T3_SEL0 bit is determined by the SONET/SDH pin during reset. Programming Information 105 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL T0_DPLL_START_BW_DAMPING_CNFG - T0 DPLL Start Bandwidth & Damping Factor Configuration Address: 56H Type: Read / Write Default Value: 01101111 7 T0_DPLL_STA RT_DAMPING2 Bit 6 T0_DPLL_STA RT_DAMPING1 Name 5 T0_DPLL_STA RT_DAMPING0 4 T0_DPLL_STA RT_BW4 3 T0_DPLL_STA RT_BW3 2 T0_DPLL_STA RT_BW2 Description 1 T0_DPLL_STA RT_BW1 0 T0_DPLL_STA RT_BW0 7-5 4-0 These bits set the starting damping factor for T0 DPLL. 000: Reserved. 001: 1.2. 010: 2.5. T0_DPLL_START_DAMPING[2:0] 011: 5. (default) 100: 10. 101: 20. 110, 111: Reserved. These bits set the starting bandwidth for T0 DPLL. 00000: 0.5 mHz. 00001: 1 mHz. 00010: 2 mHz. 00011: 4 mHz. 00100: 8 mHz. 00101: 15 mHz. 00110: 30 mHz. 00111: 60 mHz. 01000: 0.1 Hz. T0_DPLL_START_BW[4:0] 01001: 0.3 Hz. 01010: 0.6 Hz. 01011: 1.2 Hz. 01100: 2.5 Hz. 01101: 4 Hz. 01110: 8 Hz. 01111: 18 Hz. (default) 10000: 35 Hz. 10001: 70 Hz. 10010: 560 Hz. 10011 ~ 11111: Reserved. Programming Information 106 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL T0_DPLL_ACQ_BW_DAMPING_CNFG - T0 DPLL Acquisition Bandwidth & Damping Factor Configuration Address: 57H Type: Read / Write Default Value: 01101111 7 T0_DPLL_ACQ _DAMPING2 Bit 6 T0_DPLL_ACQ _DAMPING1 Name 5 T0_DPLL_ACQ _DAMPING0 4 T0_DPLL_ACQ _BW4 3 T0_DPLL_ACQ _BW3 2 T0_DPLL_ACQ _BW2 Description 1 T0_DPLL_ACQ _BW1 0 T0_DPLL_ACQ _BW0 7-5 4-0 These bits set the acquisition damping factor for T0 DPLL. 000: Reserved. 001: 1.2. 010: 2.5. T0_DPLL_ACQ_DAMPING[2:0] 011: 5. (default) 100: 10. 101: 20. 110, 111: Reserved. These bits set the acquisition bandwidth for T0 DPLL. 00000: 0.5 mHz. 00001: 1 mHz. 00010: 2 mHz. 00011: 4 mHz. 00100: 8 mHz. 00101: 15 mHz. 00110: 30 mHz. 00111: 60 mHz. 01000: 0.1 Hz. T0_DPLL_ACQ_BW[4:0] 01001: 0.3 Hz. 01010: 0.6 Hz. 01011: 1.2 Hz. 01100: 2.5 Hz. 01101: 4 Hz. 01110: 8 Hz. 01111: 18 Hz. (default) 10000: 35 Hz. 10001: 70 Hz. 10010: 560 Hz. 10011 ~ 11111: Reserved. Programming Information 107 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL T0_DPLL_LOCKED_BW_DAMPING_CNFG - T0 DPLL Locked Bandwidth & Damping Factor Configuration Address: 58H Type: Read / Write Default Value: 01101011 7 T0_DPLL_LOCK ED_DAMPING2 Bit 6 T0_DPLL_LOCK ED_DAMPING1 Name 5 T0_DPLL_LOCK ED_DAMPING0 4 T0_DPLL_LOC KED_BW4 3 T0_DPLL_LOC KED_BW3 2 T0_DPLL_LOC KED_BW2 Description 1 T0_DPLL_LOC KED_BW1 0 T0_DPLL_LOC KED_BW0 7-5 4-0 These bits set the locked damping factor for T0 DPLL. 000: Reserved. 001: 1.2. 010: 2.5. T0_DPLL_LOCKED_DAMPING[2:0] 011: 5. (default) 100: 10. 101: 20. 110, 111: Reserved. These bits set the locked bandwidth for T0 DPLL. 00000: 0.5 mHz. 00001: 1 mHz. 00010: 2 mHz. 00011: 4 mHz. 00100: 8 mHz. 00101: 15 mHz. 00110: 30 mHz. 00111: 60 mHz. 01000: 0.1 Hz. T0_DPLL_LOCKED_BW[4:0] 01001: 0.3 Hz. 01010: 0.6 Hz. 01011: 1.2 Hz. (default) 01100: 2.5 Hz. 01101: 4 Hz. 01110: 8 Hz. 01111: 18 Hz. 10000: 35 Hz. 10001: 70 Hz. 10010: 560 Hz. 10011 ~ 11111: Reserved. Programming Information 108 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL T0_BW_OVERSHOOT_CNFG - T0 DPLL Bandwidth Overshoot Configuration Address: 59H Type: Read / Write Default Value: 1XXX1XXX 7 AUTO_BW_SEL Bit Name 6 5 4 3 T0_LIMT Description 2 1 0 - 7 6-4 3 2-0 This bit determines whether starting or acquisition bandwidth / damping factor is used for T0 DPLL. 0: The starting and acquisition bandwidths / damping factors are not used. Only the locked bandwidth / damping factor is used AUTO_BW_SEL regardless of the T0 DPLL locking stage. 1: The starting, acquisition or locked bandwidth / damping factor is used automatically depending on different T0 DPLL locking stages. (default) Reserved. This bit determines whether the integral path value is frozen when the T0 DPLL hard limit is reached. T0_LIMT 0: Not frozen. 1: Frozen. It will minimize the subsequent overshoot when T0 DPLL is pulling in. (default) Reserved. Programming Information 109 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL PHASE_LOSS_COARSE_LIMIT_CNFG - Phase Loss Coarse Detector Limit Configuration * Address: 5AH Type: Read / Write Default Value: 10000101 7 COARSE_PH_L OS_LIMT_EN Bit 7 6 Name 6 WIDE_EN 5 MULTI_PH_APP 4 MULTI_PH_8K_ 4K_2K_EN 3 PH_LOS_COA RSE_LIMT3 2 PH_LOS_COA RSE_LIMT2 1 PH_LOS_COA RSE_LIMT1 0 PH_LOS_COA RSE_LIMT0 Description 5 This bit controls whether the occurrence of the coarse phase loss will result in the T0/T4 DPLL being unlocked. COARSE_PH_LOS_LIMT_EN 0: Disabled. 1: Enabled. (default) WIDE_EN Refer to the description of the MULTI_PH_8K_4K_2K_EN bit (b4, 5AH). This bit determines whether the PFD output of T0/T4 DPLL is limited to 1 UI or is limited to the coarse phase limit. 0: Limited to 1 UI. (default) 1: Limited to the coarse phase limit. When the selected input clock is of 2 kHz, 4 kHz or 8 kHz, the coarse phase limit depends MULTI_PH_APP on the MULTI_PH_8K_4K_2K_EN bit, the WIDE_EN bit and the PH_LOS_COARSE_LIMT[3:0] bits; when the selected input clock is of other frequencies than 2 kHz, 4 kHz and 8 kHz, the coarse phase limit depends on the WIDE_EN bit and the PH_LOS_COARSE_LIMT[3:0] bits. Refer to the description of the MULTI_PH_8K_4K_2K_EN bit (b4, 5AH) for details. This bit, together with the WIDE_EN bit (b6, 5AH) and the PH_LOS_COARSE_LIMT[3:0] bits (b3~0, 5AH), determines the coarse phase limit when the selected input clock is of 2 kHz, 4 kHz or 8 kHz. When the selected input clock is of other frequencies than 2 kHz, 4 kHz and 8 kHz, the coarse phase limit depends on the WIDE_EN bit and the PH_LOS_COARSE_LIMT[3:0] bits. Selected Input Clock MULTI_PH_8K_4K_2K_EN WIDE_EN Coarse Phase Limit 1 UI 1 UI set by the PH_LOS_COARSE_LIMT[3:0] bits (b3~0, 5AH). 1 UI set by the PH_LOS_COARSE_LIMT[3:0] bits (b3~0, 5AH). 4 MULTI_PH_8K_4K_2K_EN 2 kHz, 4 kHz or 8 kHz 0 1 don't-care 0 1 0 other than 2 kHz, 4 kHz and 8 kHz don't-care 1 These bit set the coarse phase limit. The limit is used only in some cases. Refer to the description of the MULTI_PH_8K_4K_2K_EN bit (b4, 5AH). 0000: 1 UI. 0001: 3 UI. 0010: 7 UI. 0011: 15 UI. 3 - 0 PH_LOS_COARSE_LIMT[3:0] 0100: 31 UI. 0101: 63 UI. (default) 0110: 127 UI. 0111: 255 UI. 1000: 511 UI. 1001: 1023 UI (T0); Reserved (T4). 1010-1111: Reserved. Programming Information 110 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL PHASE_LOSS_FINE_LIMIT_CNFG - Phase Loss Fine Detector Limit Configuration * Address: 5BH Type: Read / Write Default Value: 10XXX010 7 FINE_PH_LOS_ LIMT_EN Bit 7 6 FAST_LOS_SW Name 5 4 3 2 PH_LOS_FINE _LIMT2 Description 1 PH_LOS_FINE _LIMT1 0 PH_LOS_FINE _LIMT0 6 5-3 2-0 This bit controls whether the occurrence of the fine phase loss will result in the T0/T4 DPLL being unlocked. FINE_PH_LOS_LIMT_EN 0: Disabled. 1: Enabled. (default) The value in this bit can be switched only when it is available for T0 path; this bit is always `1' when it is available for T4 path. This bit controls whether the occurrence of the fast loss will result in the T0/T4 DPLL being unlocked. FAST_LOS_SW 0: Does not result in the T0 DPLL being unlocked. T0 DPLL will enter Temp-Holdover mode automatically. (default) 1: Results in the T0/T4 DPLL being unlocked. For T0 path, T0 DPLL will enter Lost-Phase mode if the T0 DPLL operating mode is switched automatically. Reserved. These bits set a fine phase limit. 000: 0. 001: (45 ~ 90 ). 010: (90 ~ 180 ). (default) PH_LOS_FINE_LIMT[2:0] 011: (180 ~ 360 ). 100: (20 ns ~ 25 ns). 101: (60 ns ~ 65 ns). 110: (120 ns ~ 125 ns). 111: (950 ns ~ 955 ns). Programming Information 111 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL T0_HOLDOVER_MODE_CNFG - T0 DPLL Holdover Mode Configuration Address: 5CH Type: Read / Write Default Value: 010001XX 7 MAN_HOLDOV ER Bit 7 6 6 AUTO_AVG Name MAN_HOLDOVER AUTO_AVG 5 FAST_AVG 4 READ_AVG 3 TEMP_HOLDO VER_MODE1 2 TEMP_HOLDO VER_MODE0 Description Refer to the description of the FAST_AVG bit (b5, 5CH). Refer to the description of the FAST_AVG bit (b5, 5CH). This bit, together with the AUTO_AVG bit (b6, 5CH) and the MAN_HOLDOVER bit (b7, 5CH), determines a frequency offset acquiring method in T0 DPLL Holdover Mode. MAN_HOLDOVER 5 FAST_AVG 0 1 AUTO_AVG 0 1 don't-care FAST_AVG don't-care 0 1 Frequency Offset Acquiring Method Automatic Instantaneous Automatic Slow Averaged (default) Automatic Fast Averaged Manual 1 0 - 4 3-2 1-0 This bit controls the holdover frequency offset reading, which is read from the T0_HOLDOVER_FREQ[23:0] bits (5FH ~ 5DH). 0: The value read from the T0_HOLDOVER_FREQ[23:0] bits (5FH ~ 5DH) is equal to the one written to them. READ_AVG (default) 1: The value read from the T0_HOLDOVER_FREQ[23:0] bits (5FH ~ 5DH) is not equal to the one written to them. The value is acquired by Automatic Slow Averaged method if the FAST_AVG bit (b5, 5CH) is `0'; or is acquired by Automatic Fast Averaged method if the FAST_AVG bit (b5, 5CH) is `1'. These bits determine the frequency offset acquiring method in T0 DPLL Temp-Holdover Mode. 00: The method is the same as that used in T0 DPLL Holdover mode. TEMP_HOLDOVER_MODE[1:0] 01: Automatic Instantaneous. (default) 10: Automatic Fast Averaged. 11: Automatic Slow Averaged. Reserved. T0_HOLDOVER_FREQ[7:0]_CNFG - T0 DPLL Holdover Frequency Configuration 1 Address: 5DH Type: Read / Write Default Value: 00000000 7 T0_HOLDOVER _FREQ7 Bit 7-0 6 T0_HOLDOVER _FREQ6 Name 5 T0_HOLDOVER _FREQ5 4 T0_HOLDOVE R_FREQ4 3 T0_HOLDOVE R_FREQ3 2 T0_HOLDOVE R_FREQ2 1 T0_HOLDOVE R_FREQ1 0 T0_HOLDOVE R_FREQ0 Description T0_HOLDOVER_FREQ[7:0] Refer to the description of the T0_HOLDOVER_FREQ[23:16] bits (b7~0, 5FH). Programming Information 112 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL T0_HOLDOVER_FREQ[15:8]_CNFG - T0 DPLL Holdover Frequency Configuration 2 Address: 5EH Type: Read / Write Default Value: 00000000 7 T0_HOLDOVER _FREQ15 Bit 7-0 6 T0_HOLDOVER _FREQ14 Name 5 T0_HOLDOVER _FREQ13 4 T0_HOLDOVE R_FREQ12 3 T0_HOLDOVE R_FREQ11 2 T0_HOLDOVE R_FREQ10 Description 1 T0_HOLDOVE R_FREQ9 0 T0_HOLDOVE R_FREQ8 T0_HOLDOVER_FREQ[15:8] Refer to the description of the T0_HOLDOVER_FREQ[23:16] bits (b7~0, 5FH). T0_HOLDOVER_FREQ[23:16]_CNFG - T0 DPLL Holdover Frequency Configuration 3 Address: 5FH Type: Read / Write Default Value: 00000000 7 T0_HOLDOVER _FREQ23 Bit 7-0 6 T0_HOLDOVER _FREQ22 Name 5 T0_HOLDOVER _FREQ21 4 T0_HOLDOVE R_FREQ20 3 T0_HOLDOVE R_FREQ19 2 T0_HOLDOVE R_FREQ18 Description 1 T0_HOLDOVE R_FREQ17 0 T0_HOLDOVE R_FREQ16 The T0_HOLDOVER_FREQ[23:0] bits represent a 2's complement signed integer. In T0 DPLL Holdover mode, the value written to these bits multiplied by 0.000011 is the frequency offset set manuT0_HOLDOVER_FREQ[23:16] ally; the value read from these bits multiplied by 0.000011 is the frequency offset automatically slow or fast averaged or manually set, as determined by the READ_AVG bit (b4, 5CH) and the FAST_AVG bit (b5, 5CH). Programming Information 113 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL T4_DPLL_APLL_PATH_CNFG - T4 DPLL & APLL Path Configuration Address: 60H Type: Read / Write Default Value: 01000X0X 7 T4_APLL_PATH 3 Bit 6 T4_APLL_PA TH2 Name 5 T4_APLL_PA TH1 4 T4_APLL_PA TH0 3 T4_GSM_GPS_16 E1_16T1_SEL1 2 T4_GSM_GPS_16 E1_16T1_SEL0 Description 1 T4_12E1_24T1_ E3_T3_SEL1 0 T4_12E1_24T1_ E3_T3_SEL0 7-4 3-2 1-0 These bits select an input to the T4 APLL. 0000: The output of T0 DPLL 77.76 MHz path. 0001: The output of T0 DPLL 12E1/24T1/E3/T3 path. 0010: The output of T0 DPLL 16E1/16T1 path. 0011: The output of T0 DPLL ETH/OBSAI/16E1/16T1 path. T4_APLL_PATH[3:0] 0100: The output of T4 DPLL 77.76 MHz path. (default) 0101: The output of T4 DPLL 12E1/24T1/E3/T3 path. 0110: The output of T4 DPLL 16E1/16T1 path. 0111: The output of T4 DPLL GSM/GPS/16E1/16T1 path. 1XXX: Reserved. These bits select an output clock from the T4 DPLL GSM/GPS/16E1/16T1 path. 00: 16E1. 01: 16T1. T4_GSM_GPS_16E1_16T1_SEL[1:0] 10: GSM. 11: GPS. The default value of the T0_GSM_GPS_16E1_16T1_SEL0 bit is determined by the SONET/SDH pin during reset. These bits select an output clock from the T4 DPLL 12E1/24T1/E3/T3 path. 00: 12E1. 01: 24T1. T4_12E1_24T1_E3_T3_SEL[1:0] 10: E3. 11: T3. The default value of the T4_12E1_24T1_E3_T3_SEL0 bit is determined by the SONET/SDH pin during reset. Programming Information 114 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL T4_DPLL_LOCKED_BW_DAMPING_CNFG - T4 DPLL Locked Bandwidth & Damping Factor Configuration Address: 61H Type: Read / Write Default Value: 011XXX00 7 T4_DPLL_LOCK ED_DAMPING2 Bit 6 T4_DPLL_LOCK ED_DAMPING1 Name 5 T4_DPLL_LOCK ED_DAMPING0 4 3 2 Description 1 T4_DPLL_LOC KED_BW1 0 T4_DPLL_LOC KED_BW0 7-5 4-2 1-0 These bits set the locked damping factor for T4 DPLL. 000: Reserved. 001: 1.2. 010: 2.5. T4_DPLL_LOCKED_DAMPING[2:0] 011: 5. (default) 100: 10. 101: 20. 110, 111: Reserved. Reserved. These bits set the locked bandwidth for T4 DPLL. 00: 18 Hz. (default) T4_DPLL_LOCKED_BW[1:0] 01: 35 Hz. 10: 70 Hz. 11: 560 Hz. CURRENT_DPLL_FREQ[7:0]_STS - DPLL Current Frequency Status 1 * Address: 62H Type: Read Default Value: 00000000 7 CURRENT_DP LL_FREQ7 Bit 7-0 6 CURRENT_DP LL_FREQ6 Name 5 CURRENT_DP LL_FREQ5 4 CURRENT_DP LL_FREQ4 3 CURRENT_DP LL_FREQ3 2 CURRENT_DP LL_FREQ2 Description 1 CURRENT_DP LL_FREQ1 0 CURRENT_DP LL_FREQ0 CURRENT_DPLL_FREQ[7:0] Refer to the description of the CURRENT_DPLL_FREQ[23:16] bits (b7~0, 64H). CURRENT_DPLL_FREQ[15:8]_STS - DPLL Current Frequency Status 2 * Address: 63H Type: Read Default Value: 00000000 7 CURRENT_DP LL_FREQ15 Bit 7-0 6 CURRENT_DP LL_FREQ14 Name 5 CURRENT_DP LL_FREQ13 4 CURRENT_DP LL_FREQ12 3 CURRENT_DP LL_FREQ11 2 CURRENT_DP LL_FREQ10 Description 1 CURRENT_DP LL_FREQ9 0 CURRENT_DP LL_FREQ8 CURRENT_DPLL_FREQ[15:8] Refer to the description of the CURRENT_DPLL_FREQ[23:16] bits (b7~0, 64H). Programming Information 115 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL CURRENT_DPLL_FREQ[23:16]_STS - DPLL Current Frequency Status 3 * Address: 64H Type: Read Default Value: 00000000 7 CURRENT_DP LL_FREQ23 Bit 7-0 6 CURRENT_DP LL_FREQ22 Name 5 CURRENT_DP LL_FREQ21 4 CURRENT_DP LL_FREQ20 3 CURRENT_DP LL_FREQ19 2 CURRENT_DP LL_FREQ18 Description 1 CURRENT_DP LL_FREQ17 0 CURRENT_DP LL_FREQ16 The CURRENT_DPLL_FREQ[23:0] bits represent a 2's complement signed integer. If the value in these bits is mulCURRENT_DPLL_FREQ[23:16] tiplied by 0.000011, the current frequency offset of the T0/T4 DPLL output in ppm with respect to the master clock will be gotten. DPLL_FREQ_SOFT_LIMIT_CNFG - DPLL Soft Limit Configuration Address: 65H Type: Read / Write Default Value: 10001100 7 FREQ_LIMT_P H_LOS Bit 7 6 DPLL_FREQ_S OFT_LIMT6 Name FREQ_LIMT_PH_LOS 5 DPLL_FREQ_S OFT_LIMT5 4 DPLL_FREQ_S OFT_LIMT4 3 DPLL_FREQ_S OFT_LIMT3 2 DPLL_FREQ_S OFT_LIMT2 1 DPLL_FREQ_S OFT_LIMT1 0 DPLL_FREQ_S OFT_LIMT0 Description 6-0 This bit determines whether the T0/T4 DPLL in hard alarm status will result in its being unlocked. 0: Disabled. 1: Enabled. (default) These bits represent an unsigned integer. If the value is multiplied by 0.724, the DPLL soft limit for T0 and T4 paths in DPLL_FREQ_SOFT_LIMT[6:0] ppm will be gotten. The DPLL soft limit is symmetrical about zero. DPLL_FREQ_HARD_LIMIT[7:0]_CNFG - DPLL Hard Limit Configuration 1 Address: 66H Type: Read / Write Default Value: 10101011 7 DPLL_FREQ_H ARD_LIMT7 Bit 7-0 6 DPLL_FREQ_H ARD_LIMT6 Name 5 DPLL_FREQ_H ARD_LIMT5 4 DPLL_FREQ_H ARD_LIMT4 3 DPLL_FREQ_H ARD_LIMT3 2 DPLL_FREQ_H ARD_LIMT2 Description 1 DPLL_FREQ_H ARD_LIMT1 0 DPLL_FREQ_H ARD_LIMT0 DPLL_FREQ_HARD_LIMT[7:0] Refer to the description of the DPLL_FREQ_HARD_LIMT[15:8] bits (b7~0, 67H). Programming Information 116 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL DPLL_FREQ_HARD_LIMIT[15:8]_CNFG - DPLL Hard Limit Configuration 2 Address: 67H Type: Read / Write Default Value: 00011001 7 DPLL_FREQ_H ARD_LIMT15 Bit 7-0 6 DPLL_FREQ_H ARD_LIMT14 Name 5 DPLL_FREQ_H ARD_LIMT13 4 DPLL_FREQ_H ARD_LIMT12 3 DPLL_FREQ_H ARD_LIMT11 2 DPLL_FREQ_H ARD_LIMT10 Description 1 DPLL_FREQ_H ARD_LIMT9 0 DPLL_FREQ_H ARD_LIMT8 The DPLL_FREQ_HARD_LIMT[15:0] bits represent an unsigned integer. If the value is multiplied by 0.0014, the DPLL_FREQ_HARD_LIMT[15:8] DPLL hard limit for T0 and T4 paths in ppm will be gotten. The DPLL hard limit is symmetrical about zero. CURRENT_DPLL_PHASE[7:0]_STS - DPLL Current Phase Status 1 * Address: 68H Type: Read Default Value: 00000000 7 CURRENT_PH _DATA7 Bit 7-0 6 CURRENT_PH _DATA6 Name 5 CURRENT_PH _DATA5 4 CURRENT_PH _DATA4 3 CURRENT_PH _DATA3 2 CURRENT_PH _DATA2 Description 1 CURRENT_PH _DATA1 0 CURRENT_PH _DATA0 CURRENT_PH_DATA[7:0] Refer to the description of the CURRENT_PH_DATA[15:8] bits (b7~0, 69H). CURRENT_DPLL_PHASE[15:8]_STS - DPLL Current Phase Status 2 * Address: 69H Type: Read Default Value: 00000000 7 CURRENT_PH _DATA15 Bit 7-0 6 CURRENT_PH _DATA14 Name 5 CURRENT_PH _DATA13 4 CURRENT_PH _DATA12 3 CURRENT_PH _DATA11 2 CURRENT_PH _DATA10 Description 1 CURRENT_PH _DATA9 0 CURRENT_PH _DATA8 The CURRENT_PH_DATA[15:0] bits represent a 2's complement signed integer. If the value is multiplied by 0.61, the CURRENT_PH_DATA[15:8] averaged phase error of the T0/T4 DPLL feedback with respect to the selected input clock in ns will be gotten. Programming Information 117 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL T0_T4_APLL_BW_CNFG - T0 / T4 APLL Bandwidth Configuration Address: 6AH Type: Read / Write Default Value: XX01XX01 7 Bit 7-6 Name Reserved. These bits set the bandwidth for T0 APLL. 00: 100 kHz. T0_APLL_BW[1:0] 01: 500 kHz. (default) 10: 1 MHz. 11: 2 MHz. Reserved. These bits set the bandwidth for T4 APLL. 00: 100 kHz. T4_APLL_BW[1:0] 01: 500 kHz. (default) 10: 1 MHz. 11: 2 MHz. 6 5 T0_APLL_BW1 4 T0_APLL_BW0 3 Description 2 1 T4_APLL_BW1 0 T4_APLL_BW0 5-4 3-2 1-0 Programming Information 118 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL 7.2.8 OUTPUT CONFIGURATION REGISTERS OUT1_FREQ_CNFG - Output Clock 1 Frequency Configuration Address: 6DH Type: Read / Write Default Value: 00001000 7 OUT1_PATH_S EL3 Bit 6 OUT1_PATH_S EL2 Name 5 OUT1_PATH_S EL1 4 OUT1_PATH_S EL0 3 OUT1_DIVIDER 3 2 OUT1_DIVIDER 2 1 OUT1_DIVIDER 1 0 OUT1_DIVIDER 0 Description 7-4 3-0 These bits select an input to OUT1. 0000 ~ 0011: The output of T0 APLL. (default: 0000) 0100: The output of T0 DPLL 77.76 MHz path. 0101: The output of T0 DPLL 12E1/24T1/E3/T3 path. 0110: The output of T0 DPLL 16E1/16T1 path. OUT1_PATH_SEL[3:0] 0111: The output of T0 DPLL ETH/OBSAI/16E1/16T1 path. 1000 ~ 1011: The output of T4 APLL. 1100: The output of T4 DPLL 77.76 MHz path. 1101: The output of T4 DPLL 12E1/24T1/E3/T3 path. 1110: The output of T4 DPLL 16E1/16T1 path. 1111: The output of T4 DPLL GSM/GPS/16E1/16T1 path. These bits select a division factor of the divider for OUT1. The output frequency is determined by the division factor and the signal derived from T0/T4 DPLL or T0/T4 APLL output OUT1_DIVIDER[3:0] (selected by the OUT1_PATH_SEL[3:0] bits (b7~4, 6DH)). If the signal is derived from one of the T0/T4 DPLL outputs, please refer to Table 24 for the division factor selection. If the signal is derived from the T0/T4 APLL output, please refer to Table 25~Table 27 for the division factor selection. Programming Information 119 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL OUT2_FREQ_CNFG - Output Clock 2 Frequency Configuration Address: 6EH Type: Read / Write Default Value: 00000110 7 OUT2_PATH_S EL3 Bit 6 OUT2_PATH_S EL2 Name 5 OUT2_PATH_S EL1 4 OUT2_PATH_S EL0 3 OUT2_DIVIDER 3 2 OUT2_DIVIDER 2 1 OUT2_DIVIDER 1 0 OUT2_DIVIDER 0 Description 7-4 3-0 These bits select an input to OUT2. 0000 ~ 0011: The output of T0 APLL. (default: 0000) 0100: The output of T0 DPLL 77.76 MHz path. 0101: The output of T0 DPLL 12E1/24T1/E3/T3 path. 0110: The output of T0 DPLL 16E1/16T1 path. OUT2_PATH_SEL[3:0] 0111: The output of T0 DPLL ETH/OBSAI/16E1/16T1 path. 1000 ~ 1011: The output of T4 APLL. 1100: The output of T4 DPLL 77.76 MHz path. 1101: The output of T4 DPLL 12E1/24T1/E3/T3 path. 1110: The output of T4 DPLL 16E1/16T1 path. 1111: The output of T4 DPLL GSM/GPS/16E1/16T1 path. These bits select a division factor of the divider for OUT2. The output frequency is determined by the division factor and the signal derived from T0/T4 DPLL or T0/T4 APLL output OUT2_DIVIDER[3:0] (selected by the OUT2_PATH_SEL[3:0] bits (b7~4, 6EH)). If the signal is derived from one of the T0/T4 DPLL outputs, please refer to Table 24 for the division factor selection. If the signal is derived from the T0/T4 APLL output, please refer to Table 25~Table 27 for the division factor selection. Programming Information 120 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL OUT3_FREQ_CNFG - Output Clock 3 Frequency Configuration Address: 6FH Type: Read / Write Default Value: 00000100 7 OUT3_PATH_S EL3 Bit 6 OUT3_PATH_S EL2 Name 5 OUT3_PATH_S EL1 4 OUT3_PATH_S EL0 3 OUT3_DIVIDER 3 2 OUT3_DIVIDER 2 1 OUT3_DIVIDER 1 0 OUT3_DIVIDER 0 Description 7-4 3-0 These bits select an input to OUT3. 0000 ~ 0011: The output of T0 APLL. (default: 0000) 0100: The output of T0 DPLL 77.76 MHz path. 0101: The output of T0 DPLL 12E1/24T1/E3/T3 path. 0110: The output of T0 DPLL 16E1/16T1 path. OUT3_PATH_SEL[3:0] 0111: The output of T0 DPLL ETH/OBSAI/16E1/16T1 path. 1000 ~ 1011: The output of T4 APLL. 1100: The output of T4 DPLL 77.76 MHz path. 1101: The output of T4 DPLL 12E1/24T1/E3/T3 path. 1110: The output of T4 DPLL 16E1/16T1 path. 1111: The output of T4 DPLL GSM/GPS/16E1/16T1 path. These bits select a division factor of the divider for OUT3. The output frequency is determined by the division factor and the signal derived from T0/T4 DPLL or T0/T4 APLL output OUT3_DIVIDER[3:0] (selected by the OUT3_PATH_SEL[3:0] bits (b7~4, 6FH)). If the signal is derived from one of the T0/T4 DPLL outputs, please refer to Table 24 for the division factor selection. If the signal is derived from the T0/T4 APLL output, please refer to Table 25~Table 27 for the division factor selection. Programming Information 121 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL OUT4_FREQ_CNFG - Output Clock 4 Frequency Configuration Address:70H Type: Read / Write Default Value: 00000110 7 OUT4_PATH_S EL3 Bit 6 OUT4_PATH_S EL2 Name 5 OUT4_PATH_S EL1 4 OUT4_PATH_S EL0 3 OUT4_DIVIDER 3 2 OUT4_DIVIDER 2 1 OUT4_DIVIDER 1 0 OUT4_DIVIDER 0 Description 7-4 3-0 These bits select an input to OUT4. 0000 ~ 0011: The output of T0 APLL. (default: 0000) 0100: The output of T0 DPLL 77.76 MHz path. 0101: The output of T0 DPLL 12E1/24T1/E3/T3 path. 0110: The output of T0 DPLL 16E1/16T1 path. OUT4_PATH_SEL[3:0] 0111: The output of T0 DPLL ETH/OBSAI/16E1/16T1 path. 1000 ~ 1011: The output of T4 APLL. 1100: The output of T4 DPLL 77.76 MHz path. 1101: The output of T4 DPLL 12E1/24T1/E3/T3 path. 1110: The output of T4 DPLL 16E1/16T1 path. 1111: The output of T4 DPLL GSM/GPS/16E1/16T1 path. These bits select a division factor of the divider for OUT4. The output frequency is determined by the division factor and the signal derived from T0/T4 DPLL or T0/T4 APLL output OUT4_DIVIDER[3:0] (selected by the OUT4_PATH_SEL[3:0] bits (b7~4, 70H)). If the signal is derived from one of the T0/T4 DPLL outputs, please refer to Table 24 for the division factor selection. If the signal is derived from the T0/T4 APLL output, please refer to Table 25~Table 27 for the division factor selection. Programming Information 122 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL OUT5_FREQ_CNFG - Output Clock 5 Frequency Configuration Address:71H Type: Read / Write Default Value: 00001000 7 OUT5_PATH_S EL3 Bit 6 OUT5_PATH_S EL2 Name 5 OUT5_PATH_S EL1 4 OUT5_PATH_S EL0 3 OUT5_DIVIDER 3 2 OUT5_DIVIDER 2 1 OUT5_DIVIDER 1 0 OUT5_DIVIDER 0 Description 7-4 3-0 These bits select an input to OUT5. 0000 ~ 0011: The output of T0 APLL. (default: 0000) 0100: The output of T0 DPLL 77.76 MHz path. 0101: The output of T0 DPLL 12E1/24T1/E3/T3 path. 0110: The output of T0 DPLL 16E1/16T1 path. OUT5_PATH_SEL[3:0] 0111: The output of T0 DPLL ETH/OBSAI/16E1/16T1 path. 1000 ~ 1011: The output of T4 APLL. 1100: The output of T4 DPLL 77.76 MHz path. 1101: The output of T4 DPLL 12E1/24T1/E3/T3 path. 1110: The output of T4 DPLL 16E1/16T1 path. 1111: The output of T4 DPLL GSM/GPS/16E1/16T1 path. These bits select a division factor of the divider for OUT5. The output frequency is determined by the division factor and the signal derived from T0/T4 DPLL or T0/T4 APLL output OUT5_DIVIDER[3:0] (selected by the OUT5_PATH_SEL[3:0] bits (b7~4, 71H)). If the signal is derived from one of the T0/T4 DPLL outputs, please refer to Table 24 for the division factor selection. If the signal is derived from the T0/T4 APLL output, please refer to Table 25~Table 27 for the division factor selection. OUTPUT_INV2 - Output Clock 4 & 5 Invert Configuration Address:72H Type: Read / Write Default Value: 01000000 7 6 5 4 3 2 1 OUT5_INV 0 OUT4_INV Bit 7-2 1 Name OUT5_INV Description Reserved. This bit determines whether the output on OUT5 is inverted. 0: Not inverted. (default) 1: Inverted. This bit determines whether the output on OUT4 is inverted. 0: Not inverted. (default) 1: Inverted. 0 OUT4_INV Programming Information 123 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL OUTPUT_INV1 - Output Clock 1 ~ 3 Invert Configuration Address:73H Type: Read / Write Default Value: 01000000 7 6 5 4 OUT3_INV 3 OUT2_INV 2 OUT1_INV 1 0 - Bit 7-5 4 Name OUT3_INV Description Reserved. This bit determines whether the output on OUT3 is inverted. 0: Not inverted. (default) 1: Inverted. This bit determines whether the output on OUT2 is inverted. 0: Not inverted. (default) 1: Inverted. This bit determines whether the output on OUT1 is inverted. 0: Not inverted. (default) 1: Inverted. Reserved. 3 OUT2_INV 2 1-0 OUT1_INV - Programming Information 124 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL FR_MFR_SYNC_CNFG - Frame Sync & Multiframe Sync Output Configuration Address:74H Type: Read / Write Default Value: 01100000 7 IN_2K_4K_8K_I NV Bit 7 6 8K_EN Name 5 2K_EN 4 2K_8K_PUL_P OSITION 3 8K_INV 2 8K_PUL Description 1 2K_INV 0 2K_PUL 6 5 4 3 2 1 0 This bit determines whether the input clock is inverted before locked by the T0/T4 DPLL when the input clock is 2 kHz, 4 kHz or 8 kHz. IN_2K_4K_8K_INV 0: Not inverted. (default) 1: Inverted. This bit determines whether an 8 kHz signal is enabled to be output on FRSYNC_8K. 8K_EN 0: Disabled. FRSYNC_8K outputs low. 1: Enabled. (default) This bit determines whether a 2 kHz signal is enabled to be output on MFRSYNC_2K. 2K_EN 0: Disabled. MFRSYNC_2K outputs low. 1: Enabled. (default) This bit is valid only when FRSYNC_8K and/or MFRSYNC_2K output pulse; i.e., when one of the 8K_PUL bit (b2, 74H) and the 2K_PUL bit (b0, 74H) is `1' or when the 8K_PUL bit (b2, 74H) and the 2K_PUL bit (b0, 74H) are both `1'. It deter2K_8K_PUL_POSITION mines the pulse position referring to the standard 50:50 duty cycle. 0: Pulsed on the falling edge of the standard 50:50 duty cycle position. (default) 1: Pulsed on the rising edge of the standard 50:50 duty cycle position. This bit determines whether the output on FRSYNC_8K is inverted. 8K_INV 0: Not inverted. (default) 1: Inverted. This bit determines whether the output on FRSYNC_8K is 50:50 duty cycle or pulsed. 8K_PUL 0: 50:50 duty cycle. (default) 1: Pulsed. The pulse width is defined by the period of the output on OUT1. This bit determines whether the output on MFRSYNC_2K is inverted. 2K_INV 0: Not inverted. (default) 1: Inverted. This bit determines whether the output on MFRSYNC_2K is 50:50 duty cycle or pulsed. 2K_PUL 0: 50:50 duty cycle. (default) 1: Pulsed. The pulse width is defined by the period of the output on OUT1. Programming Information 125 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL 7.2.9 PBO & PHASE OFFSET CONTROL REGISTERS PHASE_MON_PBO_CNFG - Phase Transient Monitor & PBO Configuration Address:78H Type: Read / Write Default Value: 0X000110 7 IN_NOISE_WIN DOW Bit 7 6 5 6 Name 5 PH_MON_EN 4 PH_MON_PBO _EN 3 PH_TR_MON_L IMT3 2 PH_TR_MON_L IMT2 1 PH_TR_MON_L IMT1 0 PH_TR_MON_L IMT0 Description 4 3-0 This bit determines whether the input clock whose edge respect to the reference clock is outside 5% is enabled to be selected for T0/T4 DPLL. IN_NOISE_WINDOW 0: Disabled. (default) 1: Enabled. Reserved. This bit is valid only when the PH_MON_PBO_EN bit (b4, 78H) is `1'. It determines whether the Phase Transient Monitor is enabled to monitor the phase-time changes on the T0 selected input clock. PH_MON_EN 0: Disabled. (default) 1: Enabled. This bit determines whether a PBO event is triggered when the phase-time changes on the T0 selected input clock are greater than a programmable limit over an interval of less than 0.1 seconds with the PH_MON_EN bit being `1'. The limit PH_MON_PBO_EN is programmed by the PH_TR_MON_LIMT[3:0] bits (b3~0, 78H). 0: Disabled. (default) 1: Enabled. These bits represent an unsigned integer. The Phase Transient Monitor limit in ns can be calculated as follows: PH_TR_MON_LIMT[3:0] Limit (ns) = (PH_TR_MON_LIMT[3:0] + 7) X 156. PHASE_OFFSET[7:0]_CNFG - Phase Offset Configuration 1 Address:7AH Type: Read / Write Default Value: 00000000 7 PH_OFFSET7 Bit 7-0 6 PH_OFFSET6 Name 5 PH_OFFSET5 4 PH_OFFSET4 3 PH_OFFSET3 2 PH_OFFSET2 1 PH_OFFSET1 0 PH_OFFSET0 Description PH_OFFSET[7:0] Refer to the description of the PH_OFFSET[9:8] bits (b1~0, 7BH). Programming Information 126 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL PHASE_OFFSET[9:8]_CNFG - Phase Offset Configuration 2 Address:7BH Type: Read / Write Default Value: 0XXXXX00 7 PH_OFFSET_E N Bit Name 6 5 4 3 2 1 PH_OFFSET9 0 PH_OFFSET8 Description 7 6-2 1-0 This bit determines whether the input-to-output phase offset is enabled. If the device is configured as the Master, the input-to-output phase offset: PH_OFFSET_EN 0: Disabled. (default) 1: Enabled. If the device is configured as the Slave, the input-to-output phase offset is always enabled. Reserved. These bits represent a 2's complement signed integer. If the value is multiplied by 0.61, the input-to-output phase offset in ns PH_OFFSET[9:8] to adjust will be gotten. Programming Information 127 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL 7.2.10 SYNCHRONIZATION CONFIGURATION REGISTERS SYNC_MONITOR_CNFG - Sync Monitor Configuration Address:7CH Type: Read / Write Default Value: X0101011 7 Bit 7 6 SYNC_MON_LIMT2 Name Reserved. These bits set the limit for the external sync alarm. 000: 1 UI. 001: 2 UI. 010: 3 UI. (default) SYNC_MON_LIMT[2:0] 011: 4 UI. 100: 5 UI. 101: 6 UI. 110: 7 UI. 111: 8 UI. These bits must be set to `1011'. 5 SYNC_MON_LIMT1 4 SYNC_MON_LIMT0 3 Description 2 1 0 - 6-4 3-0 SYNC_PHASE_CNFG - Sync Phase Configuration Address:7DH Type: Read / Write Default Value: XXXXXX00 7 Bit 7-2 Name 6 5 4 3 Description Reserved. These bits set the sampling of EX_SYNC1 when EX_SYNC1 is enabled to synchronize the frame sync output signal. Nominally, the falling edge of EX_SYNC1 is aligned with the rising edge of the T0 selected input clock. 00: On target. (default) 01: 0.5 UI early. 10: 1 UI late. 11: 0.5 UI late. 2 1 SYNC_PH11 0 SYNC_PH10 1-0 SYNC_PH1[1:0] Programming Information 128 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL 8 THERMAL MANAGEMENT The junction temperature Tj can be calculated as follows: Tj = TA + P X JA = 85C + 1.9W X 18.9C/W = 120.9C The device operates over the industry temperature range -40C ~ +85C. To ensure the functionality and reliability of the device, the maximum junction temperature Tjmax should not exceed 125C. In some applications, the device will consume more power and a thermal solution should be provided to ensure the junction temperature Tj does not exceed the Tjmax. The junction temperature of 120.9C is below the maximum junction temperature of 125C so no extra heat enhancement is required. In some operation environments, the calculated junction temperature might exceed the maximum junction temperature of 125C and an external thermal solution such as a heatsink is required. 8.1 JUNCTION TEMPERATURE 8.3 HEATSINK EVALUATION Junction temperature Tj is the temperature of package typically at the geographical center of the chip where the device's electrical circuits are. It can be calculated as follows: Equation 1: Tj = TA + P X JA A heatsink is expanding the surface area of the device to which it is attached. JA is now a combination of device case and heat-sink thermal resistance, as the heat flowing from the die junction to ambient goes through the package and the heatsink. JA can be calculated as follows: Equation 2: JA = JC + CH+ HA Where: JA = Junction-to-Ambient Thermal Resistance of the Package Tj = Junction Temperature TA = Ambient Temperature P = Device Power Consumption Where: JC = Junction-to-Case Thermal Resistance CH = Case-to-Heatsink Thermal Resistance HA = Heatsink-to-Ambient Thermal Resistance CH+ HA determines which heatsink and heatsink attachment can In order to calculate junction temperature, an appropriate JA must be used. The JA is shown in Table 45. Power consumption is the core power excluding the power dissipated in the loads. Table 44 provides power consumption in special environments. Table 44: Power Consumption and Maximum Junction Temperature Package TQFP/PN100 TQFP/EQG100 Power Consumption (W) 1.9 1.9 Operating Voltage (V) 3.6 3.6 Maximum TA (C) Junction Temperature (C) 85 85 125 125 be selected to ensure the junction temperature does not exceed the maximum junction temperature. According to Equation 1 and 2, CH+ HA can be calculated as follows: Equation 3: CH+ HA = (Tj - TA) / P - JC Assume: Tj = 125C (Tjmax) TA = 85C P = 1.9 W JC = 16.1C/W (TQFP/EQG100) CH+ HA can be calculated as follows: 8.2 EXAMPLE OF JUNCTION TEMPERATURE CALCULATION TA = 85C CH+ HA = (125C - 85C ) / 1.9W - 16.1C/W = 5.0C/W Assume: JA = 18.9C/W (TQFP/EQG100 Soldered & when airflow rate is 0 m/s) P = 1.9W That is, if a heatsink and heatsink attachment whose CH+ HA is below or equal to 5.0C/W is used in such operation environment, the junction temperature will not exceed the maximum junction temperature. Table 45: Thermal Data Package Pin Count Thermal Pad JC (C/W) 11.0 16.1 16.1 JB (C/W) 34.2 34.2 1.3 JA (C/W) vs Air Flow in m/s 0 39.3 35.8 18.9 1 36.2 31.1 14.6 2 34.3 29.5 13.5 3 33.5 28.6 12.9 4 32.9 27.9 12.6 5 32.6 27.4 12.4 TQFP/PN100 100 No TQFP/EQG100 100 Yes/Exposed TQFP/EQG100 100 Yes/Soldered* *note: Simulated with 3 x 3 array of thermal vias. Thermal Management 129 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL 8.4 TQFP EPAD THERMAL RELEASE PATH In order to maximize both the removal of heat from the package and the electrical performance, a land pattern must be incorporated on the Printed Circuit Board (PCB) within the footprint of the package corresponding to the exposed metal pad or exposed heat slug on the package, as shown in Figure 27. The solderable area on the PCB, as defined by the solder mask, should be at least the same size/shape as the exposed pad/slug area on the package to maximize the thermal/electrical performance. Sufficient clearance should be designed on the PCB between the outer edges of the land pattern and the inner edges of pad pattern for the leads to avoid any shorts. SOLDER PIN EXPOSED HEAT SLUG SOLDER PIN SOLDER PIN PAD GROUND PLANE THERMAL VIA LAND PATTERN (GROUND PAD) PIN PAD Figure 27. Assembly for Expose Pad thermal Release Path (Side View) While the land pattern on the PCB provides a means of heat transfer and electrical grounding from the package to the board through a solder joint, thermal vias are necessary to effectively conduct from the surface of the PCB to the ground plane(s). The land pattern must be connected to ground through these vias. The vias act as `heat pipes'. The number of vias (i.e. `heat pipes') are application specific and dependent upon the package power dissipation as well as electrical conductivity requirements. Thus, thermal and electrical analysis and/or testing are recommended to determine the minimum number needed. Maximum thermal and electrical performance is achieved when an array of vias is incorporated in the land pattern. It is recommended to use as many vias con- nected to ground as possible. It is also recommended that the via diameter should be 12 to 13mils (0.30 to 0.33mm) with 1 oz copper via barrel plating. This is desirable to avoid any solder wicking inside the via during the soldering process which may result in voids in solder between the exposed pad/slug and the thermal land. Precautions should be taken to eliminate any solder voids between the exposed heat slug and the land pattern. Note: These recommendations are to be used as a guideline only. For further information, please refer to the Application Note on the Surface Mount Assembly of Amkor's Thermally/Electrically Enhance Leadfame Base Package, Amkor Technology. Thermal Management 130 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL 9 9.1 ELECTRICAL SPECIFICATIONS ABSOLUTE MAXIMUM RATING Table 46: Absolute Maximum Rating Symbol VDD VIN VOUT TA TSTOR Parameter Supply Voltage VDD Input Voltage (non-supply pins) Output Voltage (non-supply pins) Ambient Operating Temperature Range Storage Temperature -40 -50 Min -0.5 Max 3.6 5.5 5.5 +85 +150 Unit V V V C C 9.2 RECOMMENDED OPERATION CONDITIONS Table 47: Recommended Operation Conditions Symbol VDD TA IDD PTOT Parameter Power Supply (DC voltage) VDD Ambient Temperature Range Supply Current Total Power Dissipation Min 3.0 -40 455 1.5 Typ 3.3 Max 3.6 +85 528 1.9 Unit V C mA W Exclude the loading current and power Test Condition Electrical Specifications 131 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL 9.3 9.3.1 I/O SPECIFICATIONS CMOS INPUT / OUTPUT PORT From Table 48 to Table 51, VDD is 3.3 V. Table 48: CMOS Input Port Electrical Characteristics Parameter VIH VIL IIN VIN Description Input Voltage High Input Voltage Low Input Current Input Voltage -0.5 Min 0.7VDD 0.2VDD 10 5.5 Typ Max Unit V V A V Test Condition Table 49: CMOS Input Port with Internal Pull-Up Resistor Electrical Characteristics Parameter VIH VIL PU IIN VIN Description Input Voltage High Input Voltage Low Pull-Up Resistor Input Current Input Voltage -0.5 10 Min 0.7VDD 0.2VDD 80 250 5.5 Typ Max Unit V V K A V Test Condition Table 50: CMOS Input Port with Internal Pull-Down Resistor Electrical Characteristics Parameter VIH VIL PD Description Input Voltage High Input Voltage Low Pull-Down Resistor 10 5 100 Min 0.7VDD 0.2VDD 80 40 300 350 700 40 5.5 Typ Max Unit V V K other CMOS input port with internal pull-down resistor TRST and TCK pin A[6:0], AD[7:0] pins other CMOS input port with internal pull-down resistor TRST and TCK pin A[6:0], AD[7:0] pins Test Condition IIN VIN Input Current Input Voltage -0.5 A V Table 51: CMOS Output Port Electrical Characteristics Application Pin Parameter VOH Output Clock VOL tR tF VOH Other Output VOL tR tF Description Output Voltage High Output Voltage Low Rise time Fall time Output Voltage High Output Voltage Low Rise Time Fall Time 2.5 0 Min 2.4 0 3 3 Typ Max VDD 0.4 4 4 VDD 0.4 10 10 Unit V V ns ns V V ns ns Test Condition IOH = 8 mA IOL = 8 mA 15 pF 15 pF IOH = 4 mA IOL= 4 mA 50 pF 50 pF Electrical Specifications 132 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL 9.3.2 9.3.2.1 PECL / LVDS INPUT / OUTPUT PORT PECL Input / Output Port VDD (+ 3.3 V) 50 (transmission line) 2 kHz to 667 MHz 130 IN3_POS 82 GND VDD (+ 3.3 V) 130 IN3_NEG 82 GND VDD (+ 3.3 V) 50 (transmission line) 130 IN4_POS 82 2 kHz to 667 MHz GND VDD (+ 3.3 V) 130 IN4_NEG 82 GND 130 82 VDD (+ 3.3 V) GND 50 (transmission line) 2 kHz OUT4_POS to 667 MHz OUT4_NEG 50 (transmission line) VDD (+ 3.3 V) GND 130 82 130 82 VDD (+ 3.3 V) GND 50 (transmission line) 2 kHz OUT5_POS to 667 MHz OUT5_NEG 50 (transmission line) VDD (+ 3.3 V) GND 130 82 50 (transmission line) Figure 29. Recommended PECL Output Port Line Termination 50 (transmission line) Figure 28. Recommended PECL Input Port Line Termination Electrical Specifications 133 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL Table 52: PECL Input / Output Port Electrical Characteristics Parameter VIL VIH VID VIL_S VIH_S IIH IIL VOL VOH VOD tRISE tFALL tSKEW Description Input Low Voltage, Differential Inputs Input Differential Voltage Input Low Voltage, Single-ended Input 2 Input High Voltage, Single-ended Input 2 Input High Current, Input Differential Voltage VID = 1.4 V Input Low Current, Input Differential Voltage VID = 1.4 V Output Voltage Low 3 Output Voltage High 3 Output Differential Voltage3 Output Rise time (20% to 80%) Output Fall time (20% to 80%) Output Differential Skew 1 Min VDD - 2.5 VDD - 2.4 0.1 VDD - 2.4 VDD - 1.3 -10 -10 VDD - 2.1 VDD - 1.25 580 200 200 Typ Max VDD - 0.5 VDD - 0.4 1.4 VDD - 1.5 VDD - 0.5 10 10 VDD - 1.62 VDD - 0.88 900 300 300 50 Unit V V V V V A A V V mV pS pS pS Test Condition Input High Voltage, Differential Inputs 1 Note: 1. Assuming a differential input voltage of at least 100 mV. 2. Unused differential input terminated to VDD-1.4 V. 3. With 50 load on each pin to VDD-2 V, i.e. 82 to GND and 130 to VDD. Electrical Specifications 134 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL 9.3.2.2 LVDS Input / Output Port 50 (transmission line) 2 kHz to 667 MHz 100 50 (transmission line) IN3_NEG OUT4_POS IN3_POS 50 (transmission line) 100 OUT4_NEG 50 (transmission line) 2 kHz to 667 MHz IN4_POS 2 kHz to 100 667 MHz IN4_NEG 50 (transmission line) 50 (transmission line) OUT5_POS OUT5_NEG 50 (transmission line) 100 50 (transmission line) 2 kHz to 667 MHz Figure 30. Recommended LVDS Input Port Line Termination Table 53: LVDS Input / Output Port Electrical Characteristics Parameter VCM VDIFF VIDTH RTERM VOH VOL VOD VOS RO RO VOD VOS ISA, ISB ISAB tRISE tFALL tSKEW Description Input Common-mode Voltage Range Input Peak Differential Voltage Input Differential Threshold External Differential Termination Impedance Output Voltage High Output Voltage Low Differential Output Voltage Output Offset Voltage Differential Output Impedance RO Mismatch between A and B Change in VOD between Logic 0 and Logic 1 Change in VOS between Logic 0 and Logic 1 Output Current Output Current Output Rise time (20% to 80%) Output Fall time (20% to 80%) Output Differential Skew 200 200 Min 0 100 -100 95 1350 925 250 1125 80 Figure 31. Recommended LVDS Output Port Line Termination Typ 1200 Max 2400 900 100 Unit mV mV mV mV mV mV mV % mV mV mA mA pS pS pS Test Condition 100 105 1475 1100 400 1275 RLOAD = 100 1% RLOAD = 100 1% RLOAD = 100 1% RLOAD = 100 1% VCM = 1.0 V or 1.4 V VCM = 1.0 V or 1.4 V RLOAD = 100 1% RLOAD = 100 1% Driver shorted to GND Driver shorted together RLOAD = 100 1% RLOAD = 100 1% RLOAD = 100 1% 100 120 20 25 25 24 12 300 300 50 Electrical Specifications 135 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL 9.4 JITTER & WANDER PERFORMANCE Table 54: Output Clock Jitter Generation Test Definition 1 25 MHz with T4 APLL 125 MHz with T4 APLL 156.25 MHz with T4 APLL N x 2.048 MHz without APLL N x 2.048 MHz with T0/T4 APLL N x 1.544 MHz without APLL N x 1.544 MHz with T0/T4 APLL 44.736 MHz without APLL 44.736 MHz with T0/T4 APLL 34.368 MHz without APLL 34.368 MHz with T0/T4 APLL 62.5 MHz with T4 APLL Peak to Peak Typ <1 ns <1 ns <1 ns <1 ns <1 ns <1 ns <2 ns <1 ns <2 ns <1 ns <2 ns <1 ns <2 ns <1 ns <1 ns RMS Typ 16 ps 22 ps 4.3 ps 15 ps 6.9 ps 25 ps <200 ps <100 ps <200 ps <100 ps <200 ps <100 ps <200 ps <100 ps 4.6 ps Note Test Filter 0.004 UI p-p 0.001 UI RMS OC-3 (Chip T0 DPLL + T0/T4 APLL) 6.48 MHz, 19.44 MHz, 25.92 MHz, 38.88 MHz, 51.84 MHz, 77.76 MHz, 155.52 MHz, 311.04 MHz, 622.08 MHz output 0.004 UI p-p 0.001 UI RMS 0.001 UI p-p 0.001 UI RMS 0.018 UI p-p 0.007 UI RMS OC-12 (Chip T0 DPLL + T0/T4 APLL) 6.48 MHz, 19.44 MHz, 25.92 MHz, 38.88 MHz, 51.84 MHz, 77.76 MHz, 155.52 MHz, 311.04 MHz, 622.08 MHz output + Intel GD16523 + Optical transceiver) 0.028 UI p-p 0.009 UI RMS 0.002 UI p-p 0.001 UI RMS STM-16 (Chip T0 DPLL + T0/T4 APLL) 6.48 MHz, 19.44 MHz, 25.92 MHz, 38.88 MHz, 51.84 MHz, 77.76 MHz, 155.52 MHz, 311.04 MHz, 622.08 MHz output + Intel GD16523 + Optical transceiver) Note: 1. CMAC E2747 TCXO is used. 0.162 UI p-p 0.03 UI RMS 0.01 UI p-p 0.009 UI RMS See Table 55: Output Clock Phase Noise for details 1.875 MHz - 20 MHz See Table 55: Output Clock Phase Noise for details 12 kHz - 20 MHz See Table 55: Output Clock Phase Noise for details 1.875 MHz - 20 MHz See Table 55: Output Clock Phase Noise for details 12 kHz - 20 MHz See Table 55: Output Clock Phase Noise for details 1.875 MHz - 20 MHz See Table 55: Output Clock Phase Noise for details 12 kHz - 20 MHz 20 Hz - 100 kHz See Table 55: Output Clock Phase Noise for details 20 Hz - 100 kHz 10 Hz - 40 kHz See Table 55: Output Clock Phase Noise for details 10 Hz - 40 kHz See Table 55: Output Clock Phase Noise for details 100 Hz - 800 kHz 100 Hz - 800 kHz See Table 55: Output Clock Phase Noise for details 10 Hz - 400 kHz 10 Hz - 400 kHz See Table 55: Output Clock Phase Noise for details 1.875 MHz - 20 MHz GR-253, G.813 Option 2 limit 0.1 UI p-p 12 kHz - 1.3 MHz (1 UI-6430 ps) G.813 Option 1, G.812 limit 0.5 UI p-p 500 Hz - 1.3 MHz (1 UI-6430 ps) G.813 Option 1 limit 0.1 UI p-p 65 kHz - 1.3 MHz (1 UI-6430 ps) GR-253, G.813 Option 2 limit 0.1 UI p-p 12 kHz - 5 MHz (1 UI-1608 ps) G.813 Option 1, G.812 limit 0.5 UI p-p 1 kHz - 5 MHz (1 UI-1608 ps) G.813 Option 1, G.812 limit 0.1 UI p-p 250 kHz - 5 MHz (1 UI-1608 ps) G.813 Option 1, G.812 limit 0.5 UI p-p 5 kHz - 20 MHz (1 UI-402 ps) G.813 Option 1, G.812 limit 0.1 UI p-p 1 MHz - 20 MHz (1 UI-402 ps) Electrical Specifications 136 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL Table 55: Output Clock Phase Noise Output Clock 1 622.08 MHz (T0 DPLL + T0/T4 APLL) 155.52 MHz (T0 DPLL + T0/T4 APLL) 25 MHz (T0 DPLL + T4 APLL) 125 MHz (T0 DPLL + T4 APLL) 156.25 MHz (T0 DPLL + T4 APLL) 38.88 MHz (T0 DPLL + T0/T4 APLL) 62.5 MHz (T0 DPLL + T4 APLL) 16E1 (T0/T4 APLL) 16T1 (T0/T4 APLL) E3 (T0/T4 APLL) T3 (T0/T4 APLL) Note: 1. CMAC E2747 TCXO is used. @100Hz Offset Typ -70 -82 -105 -92 -93 -104 -100 -103 -114 -107 -106 @1kHz Offset Typ -86 -98 -117 -100 -102 -116 -110 -117 -121 -119 -115 @10kHz Offset @100kHz Offset Typ Typ -95 -107 -116 -103 -100 -118 -110 -118 -120 -117 -115 -100 -112 -122 -107 -105 -123 -114 -125 -126 -123 -121 @1MHz Offset @5MHz Offset Typ Typ -107 -119 -131 -116 -115 -129 -123 -130 -130 -129 -128 -128 -140 -135 -135 -127 -149 -132 -139 -140 -139 -139 Unit dBC/Hz dBC/Hz dBC/Hz dBC/Hz dBC/Hz dBC/Hz dBC/Hz dBC/Hz dBC/Hz dBC/Hz dBC/Hz Table 56: Input Jitter Tolerance (155.52 MHz) Jitter Frequency 12 Hz 178 Hz 1.6 mHz 15.6 mHz 0.125 Hz 19.3 Hz 500 Hz 6.5 kHz 65 kHz 1.3 MHz Jitter Tolerance Amplitude (UI p-p) > 2800 > 2800 > 311 > 311 > 39 > 39 > 1.5 > 1.5 > 0.15 > 0.15 Table 58: Input Jitter Tolerance (2.048 MHz) Jitter Frequency 1 Hz 5 Hz 20 Hz 300 Hz 400 Hz 700 Hz 2400 Hz 10 kHz 50 kHz 100 kHz Jitter Tolerance Amplitude (UI p-p) 150 140 130 40 33 18 5.5 1.3 0.4 0.4 Table 57: Input Jitter Tolerance (1.544 MHz) Jitter Frequency 1 Hz 5 Hz 20 Hz 300 Hz 400 Hz 700 Hz 2400 Hz 10 kHz 40 kHz Jitter Tolerance Amplitude (UI p-p) 150 140 130 38 25 15 5 1.2 0.5 Table 59: Input Jitter Tolerance (8 kHz) Jitter Frequency 1 Hz 5 Hz 20 Hz 300 Hz 400 Hz 700 Hz 2400 Hz 3600 Hz Jitter Tolerance Amplitude (UI p-p) 0.8 0.7 0.6 0.16 0.14 0.07 0.02 0.01 Electrical Specifications 137 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL Table 60: T0 DPLL Jitter Transfer & Damping Factor 3 dB Bandwidth 0.5 mHz 1 mHz 2 mHz 4 mHz 8 mHz 15 mHz 30 mHz 60 mHz 0.1 Hz 0.3 Hz 0.6 Hz 1.2 Hz 2.5 Hz 4 Hz 8 Hz 18 Hz 35 Hz 70 Hz 560 Hz Programmable Damping Factor 1.2, 2.5, 5, 10, 20 1.2, 2.5, 5, 10, 20 1.2, 2.5, 5, 10, 20 1.2, 2.5, 5, 10, 20 1.2, 2.5, 5, 10, 20 1.2, 2.5, 5, 10, 20 1.2, 2.5, 5, 10, 20 1.2, 2.5, 5, 10, 20 1.2, 2.5, 5, 10, 20 1.2, 2.5, 5, 10, 20 1.2, 2.5, 5, 10, 20 1.2, 2.5, 5, 10, 20 1.2, 2.5, 5, 10, 20 1.2, 2.5, 5, 10, 20 1.2, 2.5, 5, 10, 20 1.2, 2.5, 5, 10, 20 1.2, 2.5, 5, 10, 20 1.2, 2.5, 5, 10, 20 1.2, 2.5, 5, 10, 20 Table 61: T4 DPLL Jitter Transfer & Damping Factor 3 dB Bandwidth 18 Hz 35 Hz 70 Hz 560 Hz Programmable Damping Factor 1.2, 2.5, 5, 10, 20 1.2, 2.5, 5, 10, 20 1.2, 2.5, 5, 10, 20 1.2, 2.5, 5, 10, 20 Electrical Specifications 138 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL 9.5 OUTPUT WANDER GENERATION template template tested result tested result Figure 32. Output Wander Generation Electrical Specifications 139 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL 9.6 INPUT / OUTPUT CLOCK TIMING The inputs and outputs are aligned ideally. But due to the circuit delays, there is delay between the inputs and outputs. 8 kHz Input Clock t1 8 kHz Output Clock 6.48 MHz Input Clock 6.48 MHz Output Clock t2 19.44 MHz Input Clock 19.44 MHz Output Clock t3 25.92 MHz Input Clock 25.92 MHz Output Clock t4 38.88 MHz Input Clock 38.88 MHz Output Clock t5 51.84 MHz Input Clock 51.84 MHz Output Clock t6 Figure 33. Input / Output Clock Timing Table 62: Input/Output Clock Timing 3 Symbol Typical Delay 1 (ns) Peak to Peak Delay Variation 2 (ns) t1 t2 t3 t4 t5 t6 4 1 1 2 1.4 3 1.6 1.6 1.6 1.6 1.6 1.6 Note: 1. Typical delay provided as reference only. 2. `Peak to Peak Delay Variation' is the delay variation that is guaranteed not to be exceeded for IN5 in Master/Slave operation. 3. Tested when IN5 is selected. Electrical Specifications 140 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL 9.7 OUTPUT CLOCK TIMING M F R S Y N C _2K/ F R S Y N C _8K N X 5 (5 M H z) N X 156.25 (156.25 M H z) N X T 1 (1.544 M H z) N X E1 (2.048 M H z) E 3 (34.368 M H z) T 3 (44.736 M H z) 6.48 M H z 19.44 M H z 25.92 M H z 38.88 M H z 51.84 M H z 62.5 M H z 77.76 M H z 155.52 M H z 311.04 M H z 622.08 M H z t1 t2 t3 t4 t5 t6 t7 t8 t9 t1 0 t1 1 t1 2 t1 3 t1 4 t1 5 t1 6 Electrical Specifications 141 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL Table 63: Output Clock Timing Symbol Typical Delay (ns) Peak to Peak Delay Variation (ns) t1 t2 t3 t4 t5 t6 t7 t8 t9 t10 t11 t12 t13 t14 t15 t16 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 2 2 2 2 2 2 2 2 2 2 2 2 1.5 1.5 (not recommended to use) 1.5 (not recommended to use) Electrical Specifications 142 March 23, 2009 Glossary 3G ADSL APLL ATM BITS CMOS DCO DPLL DSL DSLAM DWDM EPROM ETH GPS GSM IIR IP ISDN JTAG LPF LVDS MTIE MUX OBSAI OC-n PBO ----------------------------------------------------- Third Generation Asymmetric Digital Subscriber Line Analog Phase Locked Loop Asynchronous Transfer Mode Building Integrated Timing Supply Complementary Metal-Oxide Semiconductor Digital Controlled Oscillator Digital Phase Locked Loop Digital Subscriber Line Digital Subscriber Line Access MUX Dense Wavelength Division Multiplexing Erasable Programmable Read Only Memory Synchronous Ethernet System Global Positioning System Global System for Mobile Communications Infinite Impulse Response Internet Protocol Integrated Services Digital Network Joint Test Action Group Low Pass Filter Low Voltage Differential Signal Maximum Time Interval Error Multiplexer Open Base Station Architecture Initiative Optical Carried rate, n = 1, 3, 12, 48, 192, 768; 51 Mbit/s, 155 Mbit/s, 622 Mbit/s, 2.5 Gbit/s, 10 Gbit/s, 40 Gbit/s. Phase Build-Out Glossary 143 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL PDH PECL PFD PLL RMS PRS SDH SEC SMC SONET SSU STM TCM-ISDN TDEV UI WLL --------------------------------- Plesiochronous Digital Hierarchy Positive Emitter Coupled Logic Phase & Frequency Detector Phase Locked Loop Root Mean Square Primary Reference Source Synchronous Digital Hierarchy SDH / SONET Equipment Clock SONET Minimum Clock Synchronous Optical Network Synchronization Supply Unit Synchronous Transfer Mode Time Compression Multiplexing Integrated Services Digital Network Time Deviation Unit Interval Wireless Local Loop Glossary 144 March 23, 2009 Index A Averaged Phase Error ........................................................................ 32 Frequency Hard Alarm .................................................................22, 27 Frequency Hard Alarm Threshold ...................................................... 22 B Bandwidths and Damping Factors ..................................................... 32 Acquisition Bandwidth and Damping Factor ............................... 32 Locked Bandwidth and Damping Factor ..................................... 32 Starting Bandwidth and Damping Factor .................................... 32 H Hard Limit ........................................................................................... 25 Holdover Frequency Offset ................................................................ 33 I IIR ...................................................................................................... 33 Input Clock Frequency ....................................................................... 22 Input Clock Selection ......................................................................... 23 Automatic selection ..............................................................24, 27 External Fast selection .........................................................23, 27 Forced selection ...................................................................24, 27 Internal Leaky Bucket Accumulator ................................................... 21 Bucket Size ................................................................................ 21 Decay Rate ................................................................................ 21 Lower Threshold ........................................................................ 21 Upper Threshold ........................................................................ 21 C Calibration .......................................................................................... 18 Coarse Phase Loss ............................................................................ 25 Crystal Oscillator ................................................................................ 18 Current Frequency Offset ................................................................... 32 D DCO ................................................................................................... 32 Division Factor .................................................................................... 20 DPLL Hard Alarm ............................................................................... 25 DPLL Hard Limit ................................................................................. 25 DPLL Operating Mode ................................................................. 32, 33 Free-Run mode ................................................................... 32, 33 Holdover mode .................................................................... 32, 33 Automatic Fast Averaged ................................................... 33 Automatic Instantaneous .................................................... 33 Automatic Slow Averaged .................................................. 33 Manual ................................................................................ 33 Locked mode ....................................................................... 32, 33 Temp-Holdover mode ......................................................... 32 Lost-Phase mode ....................................................................... 32 Pre-Locked mode ....................................................................... 32 Pre-Locked2 mode ..................................................................... 33 DPLL Soft Alarm ................................................................................. 25 DPLL Soft Limit .................................................................................. 25 L Limit ................................................................................................... 35 LPF .................................................................................................... 32 M Master / Slave Application ................................................................. 46 Master / Slave Configuration .............................................................. 43 Master Clock ...................................................................................... 18 Microprocessor Interface ................................................................... 47 microprocessor interface EPROM ...................................................................................... 48 Intel ............................................................................................ 51 Motorola ..................................................................................... 53 Multiplexed ................................................................................. 49 Serial .......................................................................................... 55 E External Sync Alarm ........................................................................... 41 N No-activity Alarm ..........................................................................21, 27 F Fast Loss ............................................................................................ 25 Fine Phase Loss ................................................................................. 25 P PBO ................................................................................................... 35 Index 145 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL PFD .................................................................................................... 32 Phase Lock Alarm ....................................................................... 26, 27 Phase Offset ....................................................................................... 35 Phase-compared ......................................................................... 25, 35 Phase-time ......................................................................................... 35 Pre-Divider ......................................................................................... 20 DivN Divider ................................................................................ 20 HF Divider ................................................................................... 20 Lock 8k Divider ........................................................................... 20 R Reference Clock ................................................................................ 22 S Selected Input Clock Switch .............................................................. 27 Non-Revertive switch ................................................................. 28 Revertive switch ......................................................................... 27 State Machine ..............................................................................29, 31 V Validity ............................................................................................... 27 Index 146 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL PACKAGE DIMENSIONS Figure 34. 100-Pin EQG Package Dimensions (a) (in Millimeters) 147 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL Figure 35. 100-Pin EQG Package Dimensions (b) (in Millimeters) 148 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL Figure 36. EQG100 Recommended Land Pattern with Exposed Pad (in Millimeters) 149 March 23, 2009 IDT82V3385 SYNCHRONOUS ETHERNET WAN PLL ORDERING INFORMATION XXXXXXX Device Type XX X Process/ Temperature Range Blank Industrial (-40 C to +85 C) PF PFG EQG 82V3385 Thin Quad Flatpack (TQFP, PN100) Green Thin Quad Flatpack (TQFP, PNG100) Green Thin Quad Flatpack (TQFP, EQG100) WAN PLL DATASHEET DOCUMENT HISTORY 12/09/2008 pgs. 129, 130, 136, 147, 148, 149, 150 03/23/2009 pgs. 13, 14 CORPORATE HEADQUARTERS 6024 Silver Creek Valley Road San Jose, CA 95138 www.idt.com 150 for SALES: 1-800-345-7015 or 408-284-8200 fax: 408-284-2775 for Tech Support: 408-360-1552 email:telecomhelp@idt.com IDT and the IDT logo are trademarks of Integrated Device Technology, Inc. |
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