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| CS49300 Family DSP Multi-Standard Audio Decoder Family Features CS4930X: DVD Audio Sub-family -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- PES Layer decode for A/V sync DVD Audio Pack Layer Support Meridian Lossless Packing Specification (MLP)TM Dolby DigitalTM, Dolby Pro Logic IITM MPEG-2, Advanced Audio Coding Algorithm (AAC) MPEG Multichannel DTS Digital SurroundTM, DTS-ES Extended SurroundTM PES Layer decode for A/V sync Dolby Digital MPEG-2, Advanced Audio Coding Algorithm (AAC) MPEG-1 (Layers 1, 2, 3) Stereo MPEG-2 (Layers 2, 3) Stereo Dolby Digital, Dolby Pro Logic II DTS & DTS-ES decoding with integrated DTS tables Cirrus Original Surround 5.1 PCM Enhancement MPEG-2, Advanced Audio Coding Algorithm (AAC) MPEG Multichannel MP3 (MPEG-1, Layer 3) Description The CS493XX is a family of multichannel audio decoders intended to supersede the CS4923/4/5/6/7/8/9 family as the leader of audio decoding in both the DVD, broadcast and receiver markets. The family will be split into parts tailored for each of these distinct market segments. For the DVD market, parts will be offered which support Meridian Lossless Packing (MLP), Dolby Digital, Dolby Pro Logic II, MPEG Multichannel, DTS Digital Surround, DTS-ES, AAC, and subsets thereof. For the receiver market, parts will be offered which support Dolby Digital, Dolby Pro Logic II, MPEG Multichannel, DTS Digital Surround, DTS-ES, AAC, and various virtualizers and PCM enhancement algorithms such as HDCD(R), DTS Neo:6TM, LOGIC7(R), and SRS Circle Surround II(R). For the broadcast market, parts will be offered which support Dolby Digital, AAC, MPEG-1, Layers 1,2 and 3, MPEG-2, Layers 2 and 3. Under the Crystal brand, Cirrus Logic is the only single supplier of high-performance 24-bit multi-standard audio DSP decoders, DSP firmware, and high-resolution data converters. This combination of DSPs, system firmware, and data converters simplify rapid creation of world-class high-fidelity digital audio products for the Internet age. CS4931X: Broadcast Sub-family CS4932X: AVR Sub-family -- THX(R) Surround EXTM and THX(R) Ultra2 Cinema -- General Purpose AVR and Broadcast Audio Decoder (MPEG Multichannel, MPEG Stereo, MP3, C.O.S.) -- Car Audio CS49330: General Purpose Audio DSP Ordering Information: See page 85 APPLICATION CS49300 CS49310 CS49311 CS49312 CS49325 CS49326 CS49329 CS49330 CS49330 CS49330 DVD Audio Broadcast Broadcast Broadcast AVR AVR AVR Car Audio DSP General Purpose Post-Processor CORE DECODER FUNCTIONALITY MLP, AC-3, AAC, DTS, MPEG 5.1, MP3, etc. AAC, AC-3, MPEG Stereo, MP3, etc. AAC, MPEG Stereo, MP3, etc. AC-3, MPEG Stereo, MP3, etc. AC-3, COS, MPEG 5.1, MP3, etc. AC-3, DTS, COS, MPEG 5.1, MP3, etc. AC-3, AAC, DTS, MPEG 5.1, MP3, etc. Car Audio Code MPEG 5.1, MPEG Stereo, MP3, C.O.S., etc DPP, THX Surround EX, THX Ultra2 Cinema Features are a super-set of the CS4923/4/5/6/7/8/9 -- 8 channel output, including dual zone output capability -- Dynamic Channel Remapability -- Supports up to 192 kHz Fs @ 24-bit throughput -- Increased memory/MIPs -- SRAM Interface for increased delay and buffer capability -- Dual-Precision Bass Manager -- Enhance your system functionality via firmware upgrades through the Crystal WareTM Software Licensing Program RESET CMPDAT, SDATAN2 CMPCLK, SCLKN2 CMPREQ, LRCLKN2 SCLKN1, STCCLK2 LRCLKN1 SDATAN1 CLKIN CLKSEL RD, WR, SCDIO, DATA7:0, R/W, DS, SCDOUT, EMOE, EMWR, PSEL, ABOOT, EMAD7:0, A0, A1, GPIO7:0 CS GPIO11 GPIO10 GPIO9 SCCLK SCDIN INTREQ EXTMEM, GPIO8 DD DC Compressed Data Input Interface Parallel or Serial Host Interface Framer Shifter Input Buffer Controller 24-Bit DSP Processing RAM RAM Program Data Memory Memory ROM ROM Program Data Memory Memory STC MCLK SCLK Output Formatter LRCLK AUDATA[2.0] Digital Audio Input Interface PLL Clock Manager FILT2 FILT1 RAM Input Buffer RAM Output Buffer XMT958/AUDATA3 VA AGND DGND[3:1] VD[3:1] Preliminary Product Information P.O. Box 17847, Austin, Texas 78760 (512) 445 7222 FAX: (512) 445 7581 http://www.cirrus.com This document contains information for a new product. Cirrus Logic reserves the right to modify this product without notice. Copyright Cirrus Logic, Inc. 2002 (All Rights Reserved) MAR `02 DS339PP4 1 CS49300 Family DSP TABLE OF CONTENTS 1. CHARACTERISTICS AND SPECIFICATIONS ................................................................. 6 1.1 Absolute Maximum Ratings ........................................................................................ 6 1.2 Recommended Operating Conditions ......................................................................... 6 1.3 Digital D.C. Characteristics ......................................................................................... 6 1.4 Power Supply Characteristics ..................................................................................... 6 1.5 Switching Characteristics -- RESET ........................................................................ 7 1.6 Switching Characteristics -- CLKIN ............................................................................ 7 1.7 Switching Characteristics -- Intel(R) Host Mode ........................................................... 8 1.8 Switching Characteristics -- Motorola(R) Host Mode .................................................. 10 1.9 Switching Characteristics -- SPI Control Port .......................................................... 12 1.10 Switching Characteristics -- I2C(R) Control Port ....................................................... 14 1.11 Switching Characteristics -- Digital Audio Input ..................................................... 16 1.12 Switching Characteristics -- CMPDAT, CMPCLK .................................................. 18 1.13 Switching Characteristics -- Parallel Data Input ..................................................... 18 1.14 Switching Characteristics -- Digital Audio Output ................................................... 19 2. FAMILY OVERVIEW ....................................................................................................... 21 2.1 Multichannel Decoder Family of Parts ...................................................................... 21 3. TYPICAL CONNECTION DIAGRAMS ........................................................................... 24 3.1 Multiplexed Pins ........................................................................................................ 24 3.2 Termination Requirements ........................................................................................ 25 3.3 Phase Locked Loop Filter ......................................................................................... 25 4. POWER ........................................................................................................................... 25 4.1 Decoupling ................................................................................................................ 25 4.2 Analog Power Conditioning ....................................................................................... 25 Contacting Cirrus Logic Support For a com plete listing of D irect S ales, D istributor, and S ales R epresentative contacts, visit the Cirrus Logic w eb site at: http://www.cirrus.com/corporate/contacts Dolby Digital, AC-3, Dolby Pro Logic, Dolby Pro Logic II, Dolby Surround, Surround EX, Virtual Dolby Digital, MLP and the "AAC" logo are trademarks and the "Dolby Digital" logo, "Dolby Digital with Pro Logic II" logo, "Dolby" and the double-"D" symbol are registered trademarks of Dolby Laboratories Licensing Corporation. DTS, DTS Digital Surround, DTS-ES Extended Surround, DTS Neo:6, and DTS Virtual 5.1 are trademarks and the "DTS", "DTS-ES", "DTS Virtual 5.1" logos are registered trademarks of the Digital Theater Systems Corporation. The "MPEG Logo" is a registered trademark of Philips Electronics N.V. Home THX Cinema and THX are registered trademarks of Lucasfilm Ltd. Surround EX is a jointly developed technology of THX and Dolby Labs, Inc. AAC (Advanced Audio Coding) is an "MPEG-2-standard-based" digital audio compression algorithm (offering up 5.1 discrete decoded channels for this implementation) collaboratively developed by AT&T, the Fraunhofer Institute, Dolby Laboratories, and the Sony Corporation. In regards to the MP3 capable functionality of the CS49300 Family DSP (via downloading of mp3_493xxx_vv.ld and mp3e_493xxx_vv.ld application codes) the following statements are applicable: "Supply of this product conveys a license for personal, private and non-commercial use. MPEG Layer-3 audio decoding technology licensed from Fraunhofer IIS and THOMSON Multimedia." MLP and Meridian Lossless Packing are registered trademarks of Meridian Audio Ltd. Harman VMAx is a registered trademark of Harman International. The LOGIC7 logo and LOGIC7 are registered trademarks of Lexicon. SRS Circle Surround, and SRS TruSurround are trademarks of SRS Labs, Inc. The HDCD logo, HDCD, High Definition Compatible Digital and Pacific Microsonics are either registered trademarks or trademarks of Pacific Microsonics, Inc. in the United States and/or other countries. HDCD technology provided under license from Pacific Microsonics, Inc. This product's software is covered by one or more of the following in the United States: 5,479,168; 5,638,074; 5,640,161; 5,872,531; 5,808,574; 5,838,274; 5,854,600; 5,864,311; and in Australia: 669114; with other patents pending. Intel is a registered trademark of Intel Corporation. Motorola is a registered trademark of Motorola, Inc. I2C is a registered trademark of Philips Semiconductor. Purchase of I2C Components of Cirrus Logic, Inc., or one of its sublicensed Associated Companies conveys a license under the Philips I2C Patent Rights to use those components in a standard I2C system. The "Cirrus Logic Logo" is a registered trademark of Cirrus Logic, Inc. All other names are trademarks, registered trademarks, or service marks of their respective companies. Preliminary product information describes products which are in production, but for which full characterization data is not yet available. Advance product information describes products which are in development and subject to development changes. Cirrus Logic, Inc. has made best efforts to ensure that the information contained in this document is accurate and reliable. However, the information is subject to change without notice and is provided "AS IS" without warranty of any kind (express or implied). No responsibility is assumed by Cirrus Logic, Inc. for the use of this information, nor for infringements of patents or other rights of third parties. This document is the property of Cirrus Logic, Inc. and implies no license under patents, copyrights, trademarks, or trade secrets. No part of this publication may be copied, reproduced, stored in a retrieval system, or transmitted, in any form or by any means (electronic, mechanical, photographic, or otherwise) without the prior written consent of Cirrus Logic, Inc. Items from any Cirrus Logic web site or disk may be printed for use by the user. However, no part of the printout or electronic files may be copied, reproduced, stored in a retrieval system, or transmitted, in any form or by any means (electronic, mechanical, photographic, or otherwise) without the prior written consent of Cirrus Logic, Inc. The names of products of Cirrus Logic, Inc. or other vendors and suppliers appearing in this document may be trademarks or service marks of their respective owners which may be registered in some jurisdictions. A list of Cirrus Logic, Inc. trademarks and service marks can be found at http://www.cirrus.com. 2 DS339PP4 CS49300 Family DSP 4.3 Ground ...................................................................................................................... 32 4.4 Pads ......................................................................................................................... 32 5. CLOCKING ..................................................................................................................... 32 6. CONTROL ...................................................................................................................... 32 6.1 Serial Communication .............................................................................................. 33 6.1.1 SPI Communication ...................................................................................... 33 6.1.2 I2C Communication ...................................................................................... 35 6.1.3 INTREQ Behavior: A Special Case .............................................................. 39 6.2 Parallel Host Communication ................................................................................... 41 6.2.1 Intel Parallel Host Communication Mode ..................................................... 43 6.2.2 Motorola Parallel Host Communication Mode .............................................. 45 6.2.3 Procedures for Parallel Host Mode Communication .................................... 46 7. EXTERNAL MEMORY .................................................................................................... 48 7.1 Non-Paged Memory ................................................................................................. 49 7.2 Paged Memory ........................................................................................................ 49 8. BOOT PROCEDURE & RESET ..................................................................................... 52 8.1 Host Boot .................................................................................................................. 52 8.1.1 Serial Download Sequence .......................................................................... 52 8.1.2 Parallel Download Sequence ....................................................................... 55 8.2 Autoboot ................................................................................................................... 56 8.2.1 Autoboot INTREQ Behavior ......................................................................... 57 8.3 Decreasing Autoboot Times Using GFABT Codes (Fast Autoboot) ......................... 59 8.3.1 Design Considerations when using GFABT Codes ...................................... 61 8.4 Internal Boot ............................................................................................................. 61 8.5 Application Failure Boot Message ............................................................................ 61 8.6 Resetting the CS493XX ............................................................................................ 61 8.7 External Memory Examples ...................................................................................... 63 8.7.1 Non-Paged Autoboot Memory ...................................................................... 63 8.7.2 32 Kilobyte Paged Autoboot Memory ........................................................... 64 8.8 CDB49300-MEMA.0 ................................................................................................. 65 9. HARDWARE CONFIGURATION ................................................................................... 67 10.DIGITAL INPUT & OUTPUT ........................................................................................... 67 10.1 Digital Audio Formats .............................................................................................. 67 10.1.1 I2S .............................................................................................................. 67 10.1.2 Left Justified ............................................................................................... 67 10.1.3 Multichannel ............................................................................................... 67 10.2 Digital Audio Input Port ........................................................................................... 68 10.3 Compressed Data Input Port ................................................................................... 69 10.4 Byte Wide Digital Audio Data Input ......................................................................... 69 10.4.1 Parallel Delivery with Parallel Control ........................................................ 69 10.4.2 Parallel Delivery with Serial Control ........................................................... 70 10.5 Digital Audio Output Port ......................................................................................... 70 10.5.1 IEC60958 Output ........................................................................................ 71 11.HARDWARE CONFIGURATION ................................................................................... 72 11.1 Address Checking ................................................................................................... 72 11.2 Input Data Hardware Configuration ........................................................................ 72 11.2.1 Input Configuration Considerations ......................................................... 75 11.3 Output Data Hardware Configuration ...................................................................... 76 11.3.1 Output Configuration Considerations ........................................................ 78 11.4 Creating Hardware Configuration Messages .......................................................... 78 DS339PP4 3 CS49300 Family DSP 12.PIN DESCRIPTIONS ....................................................................................................... 80 13.ORDERING INFORMATION............................................................................................ 85 14.PACKAGE DIMENSIONS ............................................................................................... 85 LIST OF FIGURES Figure 1. RESET Timing ..................................................................................................................... 7 Figure 2. CLKIN with CLKSEL = VSS = PLL Enable .......................................................................... 7 Figure 3. Intel(R) Parallel Host Mode Read Cycle ................................................................................. 9 Figure 4. Intel(R) Parallel Host Mode Write Cycle ................................................................................. 9 Figure 5. Motorola(R) Parallel Host Mode Read Cycle ........................................................................ 11 Figure 6. Motorola(R) Parallel Host Mode Write Cycle ........................................................................ 11 Figure 7. SPI Control Port Timing ..................................................................................................... 13 Figure 8. I2C(R) Control Port Timing ................................................................................................... 15 Figure 9. Digital Audio Input Data, Master and Slave Clock Timing ................................................. 17 Figure 10. Serial Compressed Data Timing ...................................................................................... 18 Figure 11. Parallel Data Timing (when not in a parallel control mode) ............................................. 18 Figure 12. Digital Audio Output Data, Input and Output Clock Timing ............................................. 20 Figure 13. I2C(R) Control ..................................................................................................................... 26 Figure 14. I2C(R) Control with External Memory ................................................................................. 27 Figure 15. SPI Control ...................................................................................................................... 28 Figure 16. SPI Control with External Memory ................................................................................... 29 Figure 17. Intel(R) Parallel Control Mode ............................................................................................ 30 Figure 18. Motorola(R) Parallel Control Mode ..................................................................................... 31 Figure 19. SPI Write Flow Diagram .................................................................................................. 33 Figure 20. SPI Read Flow Diagram .................................................................................................. 34 Figure 21. SPI Timing ....................................................................................................................... 36 Figure 22. I2C(R) Write Flow Diagram ................................................................................................ 37 Figure 23. I2C(R) Read Flow Diagram ................................................................................................ 38 Figure 24. I2C(R) Timing ..................................................................................................................... 40 Figure 24. Intel Mode, One-Byte Write Flow Diagram ...................................................................... 44 Figure 25. Intel Mode, One-Byte Read Flow Diagram ...................................................................... 44 Figure 26. Motorola Mode, One-Byte Write Flow Diagram ............................................................... 45 Figure 27. Motorola Mode, One-Byte Read Flow Diagram ............................................................... 46 Figure 28. Typical Parallel Host Mode Control Write Sequence Flow Diagram ............................... 47 Figure 29. Typical Parallel Host Mode Control Read Sequence Flow Diagram ............................... 48 Figure 30. External Memory Interface .............................................................................................. 51 Figure 31. External Memory Read (16-bit address) ......................................................................... 51 Figure 32. External Memory Write (16-bit address) .......................................................................... 51 Figure 33. Typical Serial Boot and Download Procedure ................................................................. 53 Figure 34. Typical Parallel Boot and Download Procedure .............................................................. 54 Figure 35. Autoboot Timing Diagram ................................................................................................ 56 Figure 37. Autoboot INTREQ Behavior ............................................................................................ 57 Figure 36. Autoboot Sequence ......................................................................................................... 58 4 DS339PP4 CS49300 Family DSP Figure 38. Fast Autoboot Sequence Using GFABT Codes ...............................................................60 Figure 39. Performing a Reset ..........................................................................................................62 Figure 40. Non-Paged Memory .........................................................................................................64 Figure 41. Example Contents of a Paged 32 Kilobytes External Memory (Total 256 Kilobytes) .......64 Figure 42. CDB49300-MEMA.0 Daughter Card for the CDB4923/30-REV-A.0 ................................66 Figure 43. I2S Format ........................................................................................................................68 Figure 44. Left Justified Format (Rising Edge Valid SCLK) ...............................................................68 Figure 45. Multichannel Format .........................................................................................................68 LIST OF TABLES Table 1. PLL Filter Component Values .............................................................................................. 25 Table 2. Host Modes .......................................................................................................................... 32 Table 3. SPI Communication Signals................................................................................................. 33 Table 4. I2C(R) Communication Signals ............................................................................................. 35 Table 5. Parallel Input/Output Registers ............................................................................................ 42 Table 6. Intel Mode Communication Signals...................................................................................... 43 Table 7. Motorola Mode Communication Signals .............................................................................. 45 Table 8. Memory Interface Pins ......................................................................................................... 49 Table 9. Boot Write Messages ........................................................................................................... 52 Table 10. Boot Read Messages......................................................................................................... 52 Table 11. Reduced Autoboot Times using GFABT8.LD, GFABT6.LD, and GFABT4.LD on a CS493264-CL Rev. G DSP........................................................................................................ 59 Table 12. Memory Requirements for Example 5.1, 6.1 and 7.1 Channel Systems ........................... 63 Table 13. Digital Audio Input Port ...................................................................................................... 68 Table 14. Compressed Data Input Port.............................................................................................. 69 Table 15. Digital Audio Output Port.................................................................................................... 70 Table 16. MCLK/SCLK Master Mode Ratios...................................................................................... 71 Table 17. Output Channel Mapping ................................................................................................... 71 Table 18. Input Data Type Configuration (Input Parameter A)............................................................................................................................ 73 Table 19. Input Data Format Configuration (Input Parameter B)............................................................................................................................ 73 Table 20. Input SCLK Polarity Configuration (Input Parameter C) ........................................................................................................................... 75 Table 21. Input FIFO Setup Configuration (Input Parameter D) ........................................................................................................................... 75 Table 22. Output Clock Configuration (Parameter A)..................................................................................................................................... 76 Table 23. Output Data Format Configuration (Parameter B)..................................................................................................................................... 76 Table 24. Output MCLK Configuration (Parameter C) .................................................................................................................................... 77 Table 25. Output SCLK Configuration (Parameter D) .................................................................................................................................... 77 Table 26. Output SCLK Polarity Configuration (Parameter E)..................................................................................................................................... 77 Table 27. Example Values to be Sent to CS493XX After Download or Soft Reset ........................... 79 DS339PP4 5 CS49300 Family DSP 1. CHARACTERISTICS AND SPECIFICATIONS 1.1. Absolute Maximum Ratings (AGND, DGND = 0 V; all voltages with respect to 0 V) Parameter DC power supplies: Positive digital Positive analog ||VA| - |VD|| Symbol VD VA Iin VIND Tstg Min -0.3 -0.3 -0.3 -65 Max 2.75 2.75 0.3 10 3.63 150 Unit V V V mA V C Input current, any pin except supplies Digital input voltage Storage temperature CAUTION: Operation at or beyond these limits may result in permanent damage to the device. Normal operation is not guaranteed at these extremes. 1.2. Recommended Operating Conditions (AGND, DGND = 0 V; all voltages with respect to 0 V) Parameter DC power supplies: Positive digital Positive analog ||VA| - |VD|| Symbol VD VA TA Min 2.37 2.37 0 Typ 2.5 2.5 Max 2.63 2.63 0.3 70 Unit V V V C Ambient operating temperature 1.3. Digital D.C. Characteristics (TA = 25 C; VA, VD[3:1] = 2.5 V 5%; measurements performed under static conditions.) Parameter High-level input voltage Low-level input voltage High-level output voltage at IO = -2.0 mA Low-level output voltage at IO = 2.0 mA Input leakage current Symbol VIH VIL VOH VOL Iin Min 2.0 VD x 0.9 Typ Max 0.8 VD x 0.11 1.0 Unit V V V V A 1.4. Power Supply Characteristics (TA = 25 C; VA, VD[3:1] = 2.5 V 5%; measurements performed under operating conditions) Parameter Power supply current: Digital operating: VD[3:1] Analog operating: VA Symbol Min Typ 200 1.7 Max 310 4 Unit mA mA 6 DS339PP4 CS49300 Family DSP 1.5. Switching Characteristics -- RESET (TA = 25 C; VA, VD[3:1] = 2.5 V 5%; Inputs: Logic 0 = DGND, Logic 1 = VD, CL = 20 pF) Parameter RESET minimum pulse width low (-CL) RESET minimum pulse width low (-IL) All bidirectional pins high-Z after RESET low Configuration bits setup before RESET high Configuration bits hold after RESET high (Note 1) (Note 1) (Note 2) Symbol Trstl Trstl Trst2z Trstsu Trsthld Min 100 530 50 15 Max 50 Unit s s ns ns ns Notes: 1. The minimum RESET pulse listed above is valid only when using the recommended pull-up/pull-down resistors on the RD, WR, PSEL and ABOOT mode pins. For Rev. D and older parts, pull-up/pull-down resistors may be 4.7 k or 3.3 k. For Rev. E and newer parts, pull-up/pull-down resistors must be 3.3 k. 2. This specification is characterized but not production tested. RESET RD, W R, P S E L, A B O O T A ll B idirectional P ins T rst2z T rstl T rstsu T rsthld Figure 1. RESET Timing 1.6. Switching Characteristics -- CLKIN (TA = 25 C; VA, VD[3:1] = 2.5 V 5%; Inputs: Logic 0 = DGND, Logic 1 = VD, CL = 20 pF) Parameter CLKIN period for internal DSP clock mode CLKIN high time for internal DSP clock mode CLKIN low time for internal DSP clock mode Symbol Tclki Tclkih Tclkil Min 35 18 18 Max 3800 Unit ns ns ns C L K IN T clkih T clki T clkil Figure 2. CLKIN with CLKSEL = VSS = PLL Enable DS339PP4 7 CS49300 Family DSP 1.7. Switching Characteristics -- Intel(R) Host Mode (TA = 25 C; VA, VD[3:1] = 2.5 V 5%; Inputs: Logic 0 = DGND, Logic 1 = VD, CL = 20 pF) Parameter Address setup before CS and RD low or CS and WR low Address hold time after CS and RD low or CS and WR low Delay between RD then CS low or CS then RD low Data valid after CS and RD low CS and RD low for read Data hold time after CS or RD high Data high-Z after CS or RD high CS or RD high to CS and RD low for next read CS or RD high to CS and WR low for next write Delay between WR then CS low or CS then WR low Data setup before CS or WR high CS and WR low for write Data hold after CS or WR high CS or WR high to CS and RD low for next read CS or WR high to CS and WR low for next write (Note 1) (Note 1) (Note 1) (Note 2) (Note 1) (Note 1) (Note 3) (Note 1) Symbol Tias Tiah Ticdr Tidd Tirpw Tidhr Tidis Tird Tirdtw Ticdw Tidsu Tiwpw Tidhw Tiwtrd Tiwd Min 5 5 0 DCLKP + 10 5 2*DCLKP + 10 2*DCLKP + 10 0 20 DCLKP + 10 5 2*DCLKP + 10 2*DCLKP + 10 Max 21 22 Unit ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns Notes: 1. Certain timing parameters are normalized to the DSP clock, DCLKP, in nanoseconds. DCLKP = 1/DCLK. The DSP clock can be defined as follows: External CLKIN Mode: DCLK == CLKIN/4 before and during boot DCLK == CLKIN after boot Internal Clock Mode: DCLK == 10MHz before and during boot, i.e. DCLKP == 100ns DCLK == 65 MHz after boot, i.e. DCLKP == 15.4ns It should be noted that DCLK for the internal clock mode is application specific. The application code users guide should be checked to confirm DCLK for the particular application. 2. This specification is characterized but not production tested. A 470 ohm pull-up resistor was used for characterization to minimize the effects of external bus capacitance. 3. See Tidd from Intel Host Mode in Table 6 on page 43 8 DS339PP4 CS49300 Family DSP A1:0 T ia h DA T A7:0 T ias Tidd Ticdr WR Tirpw T idhr CS Tidis Tird Tirdtw RD Figure 3. Intel(R) Parallel Host Mode Read Cycle A1:0 T ia h D A T A7:0 CS T icdw RD WR T iw p w T id su T iw d T iw trd T ia s T id h w Figure 4. Intel(R) Parallel Host Mode Write Cycle DS339PP4 9 CS49300 Family DSP 1.8. Switching Characteristics -- Motorola(R) Host Mode (TA = 25 C; VA, VD[3:1] = 2.5 V 5%; Inputs: Logic 0 = DGND, Logic 1 = VD, CL = 20 pF) Parameter Address setup before CS and DS low Address hold time after CS and DS low Delay between DS then CS low or CS then DS low Data valid after CS and RD low with R/W high CS and DS low for read Data hold time after CS or DS high after read Data high-Z after CS or DS high low after read CS or DS high to CS and DS low for next read CS or DS high to CS and DS low for next write Delay between DS then CS low or CS then DS low Data setup before CS or DS high CS and DS low for write R/W setup before CS AND DS low R/W hold time after CS or DS high Data hold after CS or DS high CS or DS high to CS and DS low with R/W high for next read (Note 1) CS or DS high to CS and DS low for next write (Note 1) (Note 1) (Note 2) (Note 1) (Note 1) (Note 3) (Note 1) Symbol Tmas Tmah Tmcdr Tmdd Tmrpw Tmdhr Tmdis Tmrd Tmrdtw Tmcdw Tmdsu Tmwpw Tmrwsu Tmrwhld Tmdhw Tmwtrd Tmwd Min 5 5 0 DCLKP + 10 5 2*DCLKP + 10 2*DCLKP + 10 0 20 DCLKP + 10 5 5 5 2*DCLKP + 10 2*DCLKP + 10 Max 21 22 Unit ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns Notes: 1. Certain timing parameters are normalized to the DSP clock, DCLKP, in nanoseconds. DCLKP = 1/DCLK. The DSP clock can be defined as follows: External CLKIN Mode: DCLK == CLKIN/4 before and during boot DCLK == CLKIN after boot Internal Clock Mode: DCLK == 10MHz before and during boot, i.e. DCLKP == 100ns DCLK == 65 MHz after boot, i.e. DCLKP == 15.4ns It should be noted that DCLK for the internal clock mode is application specific. The application code users guide should be checked to confirm DCLK for the particular application. 2. This specification is characterized but not production tested. A 470 ohm pull-up resistor was used for characterization to minimize the effects of external bus capacitance. 3. See Tmdd from Motorola Host Mode in Table 7 on page 45 10 DS339PP4 CS49300 Family DSP A 1:0 T m ah D A T A 7:0 CS R /W DS T m as Tm dd T m rw su T m cd r T m rp w T m rd T m dis T m rd tw T m rw hld T m dhr Figure 5. Motorola(R) Parallel Host Mode Read Cycle A 1 :0 Tm a s D A T A 7 :0 T m d su CS T m cdw R /W T m rw su DS Tm w d T m w trd Tm w pw T m r w h ld T m dh w Tm a h Figure 6. Motorola(R) Parallel Host Mode Write Cycle DS339PP4 11 CS49300 Family DSP 1.9. Switching Characteristics -- SPI Control Port (TA = 25 C; VA, VD[3:1] = 2.5 V 5%; Inputs: Logic 0 = DGND, Logic 1 = VD, CL = 20 pF) Parameter SCCLK clock frequency CS falling to SCCLK rising Rise time of SCCLK line Fall time of SCCLK lines SCCLK low time SCCLK high time Setup time SCDIN to SCCLK rising Hold time SCCLK rising to SCDIN Transition time from SCCLK to SCDOUT valid Time from SCCLK rising to INTREQ rising Rise time for INTREQ Hold time for INTREQ from SCCLK rising Time from SCCLK falling to CS rising High time between active CS Time from CS rising to SCDOUT high-Z (Note 7) (Note 2) (Note 3) (Note 4) (Note 4) (Note 5, 7) (Note 7) (Note 7) (Note 1) Symbol fsck tcss tr tf tscl tsch tcdisu tcdih tscdov tscrh trr tscrl tsccsh tcsht tcscdo Min 20 150 150 50 50 0 20 200 Max 2000 50 50 40 200 (Note 6) 20 Units kHz ns ns ns ns ns ns ns ns ns ns ns ns ns ns Notes: 1. The specification fsck indicates the maximum speed of the hardware. The system designer should be aware that the actual maximum speed of the communication port may be limited by the software. The relevant application code user's manual should be consulted for the software speed limitations. 2. Data must be held for sufficient time to bridge the 50 ns transition time of SCCLK. 3. SCDOUT should not be sampled during this time period. 4. INTREQ goes high only if there is no data to be read from the DSP at the rising edge of SCCLK for the second-to-last bit of the last byte of data during a read operation as shown. 5. If INTREQ goes high as indicated in (Note 4), then INTREQ is guaranteed to remain high until the next rising edge of SCCLK. If there is more data to be read at this time, INTREQ goes active low again. Treat this condition as a new read transaction. Raise chip select to end the current read transaction and then drop it, followed by the 7-bit address and the R/W bit (set to 1 for a read) to start a new read transaction. 6. With a 4.7k Ohm pull-up resistor this value is typically 215ns. As this pin is open drain adjusting the pull up value will affect the rise time. 7. This time is by design and not tested. 12 DS339PP4 DS339PP4 ts c c s h ts c l 1 2 6 7 0 7 5 6 CS tc s s tc s h t 0 SC C LK ts c h A5 t c d is u t c d ih MSB ts c d o v ts c d o v LSB tri-s ta te tc s c d o A0 R /W MSB LSB A6 t r t f S C D IN A6 SCDOUT IN T R E Q t s c rh ts c rl CS49300 Family DSP Figure 7. SPI Control Port Timing 13 CS49300 Family DSP 1.10. Switching Characteristics -- I2C(R) Control Port (TA = 25 C; VA, VD[3:1] = 2.5 V 5%; Inputs: Logic 0 = DGND, Logic 1 = VD, CL = 20 pF) Parameter SCCLK clock frequency Bus free time between transmissions Start-condition hold time (prior to first clock pulse) Clock low time Clock high time SCDIO setup time to SCCLK rising SCDIO hold time from SCCLK falling Rise time of SCCLK Fall time of SCCLK Time from SCCLK falling to CS493XX ACK Time from SCCLK falling to SCDIO valid during read operation Time from SCCLK rising to INTREQ rising Hold time for INTREQ from SCCLK rising Rise time for INTREQ Setup time for stop condition (Note 4) (Note 5) (Note 6) (Note 2) (Note 3), (Note 7) (Note 7) (Note 1) Symbol fscl tbuf thdst tlow thigh tsud thdd tr tf tsca tscsdv tscrh tscrl trr tsusp 4.7 0 ** 4.7 4.0 1.2 1.0 250 0 50 300 40 40 200 Min Max 400 Units kHz s s s s ns s ns ns ns ns ns ns ns s Notes:. 1. The specification fscl indicates the maximum speed of the hardware. The system designer should be aware that the actual maximum speed of the communication port may be limited by the software. The relevant application code user's manual should be consulted for the software speed limitations. 2. Data must be held for sufficient time to bridge the 300-ns transition time of SCCLK. This hold time is by design and not tested. 3. This rise time is shorter than that recommended by the I2C specifications. For more information, see Section 6.1, "Serial Communication" on page 33. 4. INTREQ goes high only if there is no data to be read from the DSP at the rising edge of SCCLK for the last data bit of the last byte of data during a read operation as shown. 5. If INTREQ goes high as indicated in Note 8, then INTREQ is guaranteed to remain high until the next rising edge of SCCLK. If there is more data to be read at this time, INTREQ goes active low again. Treat this condition as a new read transaction. Send a new start condition followed by the 7-bit address and the R/W bit (set to 1 for a read). This time is by design and is not tested. 6. With a 4.7k Ohm pull-up resistor this value is typically 215ns. As this pin is open drain adjusting the pull up value will affect the rise time. 7. This time is by design and not tested. 14 DS339PP4 DS339PP4 stop A6 A5 R/W tscsdv 0 7 0 8 1 6 7 8 tscrl thdst thdd thigh tr tf tsca tlow tsusp ACK MSB tsud A0 LSB ACK tscrh stop start SCDIO tbuf SCCLK INTREQ CS49300 Family DSP Figure 8. I2C(R) Control Port Timing 15 CS49300 Family DSP 1.11. Switching Characteristics -- Digital Audio Input (TA = 25 C; VA, VD[3:1] = 2.5 V 5%; Inputs: Logic 0 = DGND, Logic 1 = VD, CL = 20 pF) Parameter SCLKN1(2) period for both Master and Slave mode SCLKN1(2) duty cycle for Master and Slave mode Master Mode LRCLKN1(2) delay after SCLKN1(2) transition SDATAN1(2) setup to SCLKN1(2) transition SDATAN1(2) hold time after SCLKN1(2) transition Slave Mode Time from active edge of SCLKN1(2) to LRCLKN1(2) transition Time from LRCLKN1(2) transition to SCLKN1(2) active edge SDATAN1(2) setup to SCLKN1(2) transition SDATAN1(2) hold time after SCLKN1(2) transition (Note 4) (Note 4) (Note 1) (Note 1) (Note 1, 2) (Note 3) (Note 4) (Note 4) (Note 5) Tstlr Tlrts Tsdsus Tsdhs 10 10 5 5 ns ns ns ns Tlrds Tsdsum Tsdhm 10 5 10 ns ns ns Symbol Tsclki Min 40 45 Max 55 Unit ns % Notes: 1. Master mode timing specifications are characterized, not production tested. 2. Master mode is defined as the CS493XX driving LRCLKN1(2) and SCLKN1(2). Master or Slave mode can be programmed. 3. This timing parameter is defined from the non-active edge of SCLKN1(2). The active edge of SCLKN1(2) is the point at which the data is valid. 4. This timing parameter is defined from the active edge of SCLKN1(2). The active edge of SCLKN1(2) is the point at which the data is valid. 5. Slave mode is defined as SCLKN1(2) and LRCLKN1(2) being driven by an external source. 16 DS339PP4 CS49300 Family DSP MASTER MODE SCLKN1 SCLKN2 T lrds T sc lki LR CLKN1 LR CLKN2 T sdsu m T sdh m SDATAN1 SDATAN2 S LA V E M O D E SCLKN1 SCLKN2 T lrts LR CLKN1 LR CLKN2 T sds us T sdh s SDATAN1 SDATAN2 Figure 9. Digital Audio Input Data, Master and Slave Clock Timing T sc lki T stlr DS339PP4 17 CS49300 Family DSP 1.12. Switching Characteristics -- CMPDAT, CMPCLK (TA = 25 C; VA, VD[3:1] = 2.5 V 5%; Inputs: Logic 0 = DGND, Logic 1 = VD, CL = 20 pF) Parameter Serial compressed data clock CMPCLK period CMPDAT setup before CMPCLK high CMPDAT hold after CMPCLK high Symbol Tcmpclk Tcmpsu Tcmphld Min 5 3 Max 27 Unit MHz ns ns CM P CL K CM P DA T Tcm ps u T cm p clk Figure 10. Serial Compressed Data Timing Tcm p hld 1.13. Switching Characteristics -- Parallel Data Input (TA = 25 C; VA, VD[3:1] = 2.5 V 5%; Inputs: Logic 0 = DGND, Logic 1 = VD, CL = 20 pF) Parameter CMPCLK Period DATA[7:0] setup before CMPCLK high DATA[7:0] hold after CMPCLK high Symbol Tcmpclk Tcmpsu Tcmphld Min 4*DCLK + 10 10 10 Max Unit ns ns ns Notes: 1. Certain timing parameters are normalized to the DSP clock, DCLK, in nanoseconds. The DSP clock can be defined as follows: External CLKIN Mode: DCLK == CLKIN/4 before and during boot DCLK == CLKIN after boot Internal Clock Mode: DCLK == 10MHz before and during boot, i.e. DCLK == 100ns DCLK == 65 MHz after boot, i.e. DCLK == 15.4ns It should be noted that DCLK for the internal clock mode is application specific. The application code users guide should be checked to confirm DCLK for the particular application. C M P C LK D A T A [7:0] T cm psu T cm pclk T cm phld Figure 11. Parallel Data Timing (when not in a parallel control mode) 18 DS339PP4 CS49300 Family DSP 1.14. Switching Characteristics -- Digital Audio Output (TA = 25 C; VA, VD[3:1] = 2.5 V 5%; Inputs: Logic 0 = DGND, Logic 1 = VD, CL = 20 pF) Parameter MCLK period MCLK duty cycle SCLK period for Master or Slave mode SCLK duty cycle for Master or Slave mode Master Mode SCLK delay from MCLK rising edge, MCLK as an input SCLK delay from MCLK rising edge, MCLK as an output LRCLK delay from SCLK transition AUDATA2-0 delay from SCLK transition Slave Mode (Note 4) (Note 4) (Note 5) Tstlr Tlrts Tadss 10 10 15 ns ns ns (Note 1) (Note 1) (Note 2) (Note 2) (Note 2, 3) Tsdmi Tsdmo Tlrds Tadsm -5 15 10 10 10 ns ns ns ns Tsclk Symbol Tmclk Min 40 40 40 45 Max 60 55 Unit ns % ns % Time from active edge of SCLKN1(2) to LRCLKN1(2) transition Time from LRCLKN1(2) transition to SCLKN1(2) active edge AUDATA2-0 delay from SCLK transition (Note 4, 6) Notes: 1. MCLK can be an input or an output. These specifications apply for both cases. 2. Master mode timing specifications are characterized, not production tested. 3. Master mode is defined as the CS493XX driving both SCLK and LRCLK. When MCLK is an input, it is divided to produce SCLK and LRCLK. 4. This timing parameter is defined from the non-active edge of SCLK. The active edge of SCLK is the point at which the data is valid. 5. Slave mode is defined as SCLK and LRCLK being driven by an external source. 6. This specification is characterized, not production tested. DS339PP4 19 CS49300 Family DSP MCLK (Input) T mclk SCLK (Output) T sdmi MCLK (Output) T mclk SCLK (Output) T sdmo MASTER MODE SCLK T sclk T lrds LRCLK Ta d s m AUDATA2:0 SLAVE MODE SCLK T lrts LRCLK T adss AUDATA2:0 T sclk T stlr Figure 12. Digital Audio Output Data, Input and Output Clock Timing 20 DS339PP4 CS49300 Family DSP 2. FAMILY OVERVIEW The CS49300 family contains system on a chip solutions for multichannel audio decompression and digital signal processing. The CS49300 family is split into 4 sub-families targeted at the DVD, broadcast and audio/video receiver (AVR), and effects and post processing markets. This document focuses on the electrical features and characteristics of these parts. Different features are described from a hardware design perspective. It should be understood that not all of the features portrayed in this document are supported by all of the versions of application code available. The application code user's guides should be consulted to confirm which hardware features are supported by the software. The parts use a combination of internal ROM and RAM. Depending on the application being used, a download of application software may be required each time the part is powered up. This document uses "download" and "code load" interchangeably. These terms should be interpreted as meaning the transfer of application code into the internal memory of the part from either an external microcontroller or through the autoboot procedure. Dolby DigitalTM (AC-3TM) with Dolby Pro LogicTM * Dolby DigitalTM with Dolby Pro LogicTM plus Cirrus Extra SurroundTM * Dolby DigitalTM with Dolby Pro Logic IITM * Dolby DigitalTM with Dolby Pro Logic IITM plus Cirrus Extra SurroundTM * Virtual Dolby DigitalTM * MPEG-2, Advanced Audio Coding Algorithm (AAC) * MPEG Multichannel * MPEG Multichannel with Dolby Pro Logic IITM * MPEG Multichannel plus Cirrus Extra SurroundTM * MPEG-1, Layer 3 (MP3) * DTS Digital SurroundTM * DTS Digital SurroundTM with Dolby Pro Logic IITM * DTS Digital SurroundTM plus Cirrus Extra SurroundTM * DTS-ES Extended SurroundTM (DTS-ES Discrete 6.1 & Matrix 6.1) * DTS Neo:6TM * LOGIC5(R) (5.1 Channel, Max Fs=48kHz and LOGIC7(R) (7.1 Channel, Max Fs=96kHz) * VMAx VirtualTheater(R) (Virtual Dolby Digital) * SRS TruSurroundTM (Virtual Dolby Digital and DTS Virtual 5.1TM Versions) * SRS Circle SurroundTM I/II * HDCD(R) * Cirrus P.D.F. (Dolby Pro Logic 2Fs Decoder and PCM Upsampler) * Cirrus PL2_2FS (Dolby Pro Logic II 2Fs Decoder and PCM Upsampler) Please refer to the CS4932x/CS49330 Part Matrix vs. Code Matrix (PDF) document available from the CS49300 Web Site Page for the latest listing of audio decoding/processing algorithms. The part * 21 2.1. Multichannel Decoder Family of Parts CS49300 - DVD Audio Decoder. The CS49300 device is targeted at audio decoding in the DVD via ES or PES in a serial or parallel bursty fashion for MLP or for DVD Audio Pack Layer Support. (All the other decoding/processing algorithms listed below require delivery of PCM or IEC61937packed compressed data via I2S or LJ formatted digital audio to the CS49300). Specifically the CS49300 will support all of the following decoding/processing standards: * * Meridian Lossless PackingTM (MLPTM)* (for ES and PES data delivery only) DVD Audio Pack Layer Support* (for ES and PES data delivery only) DS339PP4 CS49300 Family DSP will also support PES layer decode for audio/video synchronization and DVD Audio Pack layer support. The CS49300 will support all of the above decoding and PCM processing standards. CS4931X - Broadcast Sub-family. The CS4931X sub-family is targeted at audio decoding in the broadcast markets in systems such as digital TV, HDTV, set-top boxes and digital audio broadcast units (digital radios). Specifically the CS4931X sub-family will support the following decode standards: Dolby DigitalTM (AC-3TM) with Dolby Pro LogicTM * MPEG-2, Advanced Audio Coding Algorithm (AAC) * MPEG-1, Layers 1, 2 Stereo * MPEG-1, Layers 3 (MP3) Stereo * MPEG-2, Layer 2 Stereo * MPEG-2, Layer 3 (MP3) Stereo The part will also support PES layer decode for audio/video synchronization. The CS49310 will support all of the above decode standards while other parts in the CS4931X sub-family will decode subsets of the above audio decoding standards. * CS4932X - Audio/Video Receiver (AVR) Subfamily. The CS4932X sub-family is targeted at audio decoding in the audio/video receiver markets. Typical applications will include amplifiers with integrated decoding capability, outboard decoder pre-amplifiers, car radios and any system where the compressed audio is received in an IEC61937 format. Specifically the CS4932X sub-family will support the following decode standards: * * * Dolby DigitalTM (AC-3TM) with Dolby Pro LogicTM Dolby DigitalTM with Dolby Pro LogicTM plus Cirrus Extra SurroundTM Dolby DigitalTM with Dolby Pro Logic IITM Dolby DigitalTM with Dolby Pro Logic IITM plus Cirrus Extra SurroundTM * Virtual Dolby DigitalTM * MPEG-2, Advanced Audio Coding Algorithm (AAC) * MPEG Multichannel * MPEG Multichannel with Dolby Pro Logic IITM * MPEG Multichannel plus Cirrus Extra SurroundTM * MPEG-1, Layer 3 (MP3) * DTS Digital SurroundTM * DTS Digital SurroundTM with Dolby Pro Logic IITM * DTS Digital SurroundTM plus Cirrus Extra SurroundTM * DTS-ES Extended SurroundTM (DTS-ES Discrete 6.1 & Matrix 6.1) * DTS Neo:6TM * LOGIC5(R) (5.1 Channel, Max Fs=48kHz and LOGIC7(R) (7.1 Channel, Max Fs=96kHz) * VMAx VirtualTheater(R) (Virtual Dolby Digital) * SRS TruSurroundTM (Virtual Dolby Digital and DTS Virtual 5.1TM Versions) * SRS Circle SurroundTM I/II * HDCD(R) * Cirrus P.D.F. (Dolby Pro Logic 2Fs Decoder and PCM Upsampler) * Cirrus PL2_2FS (Dolby Pro Logic II 2Fs Decoder and PCM Upsampler) The CS49326 will support all of the above decode standards while other parts in the CS4932X subfamily will decode subsets of the above audio decoding standards. * Except for the CS49329 which offers AAC support this subfamily will offer integrated ROM support for the AC-3 code, DTS code, Cirrus Original Surround code and DTS tables. The CS49329 will 22 DS339PP4 CS49300 Family DSP require an external download for all applications but will still support the DTS tables on chip. CS49330 - General Purpose, Car Audio Processor, PCM Effects & Multichannel PostProcessing Device. The CS49330 sub-family is targeted at any system that may require post processing or multichannel effects processing, a general purpose MPEG Stereo, MPEG Multichannel, MP3, decoder or PCM effects processor or mixer, or for car audio applications. Typical applications will include multichannel amplifiers, outboard pre-amplifiers, HDTVs and car radios. Specifically the CS49330 sub-family will support the following: * Cirrus Digital Post-Processor, Home THX Cinema(R) and THX Surround EXTM 5.1 and 7.1 Channel Post-Processors Any general purpose application which only requires MPEG Multichannel; MPEG-1, Layer 3; MPEG-2, Layer 3*, or C.O.S. PCM Effects Processor. (MPEG-1, Layer 3 and MPEG-2, Layer 3 are only available for applications where serial or parallel bursty elementary stream data is available. MPEG-1, Layer 3 audio decoding is only available for IEC61937packed MP3 data.) * Multichannel Effects Processing * General purpose broadcast application that only requires MPEG-1 Stereo (Layers 1, 2, or 3) and MPEG-2 Stereo (Layers 2 or 3) * Car Audio Post-Processor This sub-family will continue to grow as more post processing algorithms are supported. This data sheet covers the CS49300, CS4931X, CS4932X and CS49330 sub-families and devices. These parts are identical from an external electrical perspective. Internally, each part has been tailored for supporting different decoding standards. For this document individual part numbers have been replaced by CS493XX if the description applies to the entire CS49300 Family DSP. If a description only applies to a particular sub-family, CS49300, CS4931X, CS4932X or CS49330 will be used. When CS49300, CS4931X, CS4932X or CS49330 is used, this should be interpreted as applying to all parts within the particular sub-family or a particular device. * DS339PP4 23 CS49300 Family DSP 3. TYPICAL CONNECTION DIAGRAMS of integration, many of these pins are internally multiplexed to serve multiple purposes. Some pins are designed to operate in one mode at power up, and serve a different purpose when the DSP is running. Other pins have functionality which can be controlled by the application running on the DSP. In order to better explain the behavior of the part, the pins which are multiplexed have been given multiple names. Each name is specific to the pin's operation in a particular mode. An example of this would be the use of pin 20 in one of the serial control modes. During the boot period of the CS493XX, pin 20 is called ABOOT. ABOOT is sampled on the rising edge of RESET. If ABOOT is high the host must download code to the DSP. If ABOOT is low when sampled, the CS493XX goes into autoboot mode and loads itself with code by generating addresses and reading data on EMAD[7:0]. When the part has been loaded with code and is running an application, however, pin 20 is called INTREQ. INTREQ is an open drain output used to inform the host that the DSP has an outgoing message which should be read. In this document, pins will be referred to by their functionality. Section 12, "Pin Descriptions" on page 80 describes each pin of the CS493XX and lists all of its names. Please refer to this section when exact pin numbers are in question. The part has 12 general purpose input and output (GPIO[11:0]) pins that all have multiple functionality. While in one of the parallel communication modes (Section 6.2, "Parallel Host Communication" on page 41), these pins are used to implement the parallel host communication interface. While in one of the serial host modes these pins are used to implement an external memory interface. Alternatively while in one of the serial host modes these pins could be used for another general purpose if the application code has been programmed to support the special purpose. In this document the pins are referenced by the Six typical connection diagrams have been presented to illustrate using the part with the different communication modes available. They are as follows: Figure 13, "I2C(R) Control" on page 26 Figure 14, "I2C(R) Control with External Memory" on page 27 Figure 15, "SPI Control" on page 28 Figure 16, "SPI Control with External Memory" on page 29 Figure 17, "Intel(R) Parallel Control Mode" on page 30 Figure 18, "Motorola(R) Parallel Control Mode" on page 31 The following should be noted when viewing the typical connection diagrams: The pins are grouped functionally in each of the typical connection diagrams. Please be aware that the CS493XX symbol may appear differently in each diagram. The external memory interface is only supported when a serial communication mode has been chosen. The typical connection diagrams demonstrate the PLL being used (CLKSEL is pulled low). To use CLKIN as the DSP clock, CLKSEL should be pulled high. The system designer must be aware that certain software features may not be available if external CLKIN is used as the DSP must run slower when external CLKIN is used. The system designer should also be aware of additional duty cycle requirements when using external CLKIN as a DSP clock. It is highly suggested that the system designer use the PLL and pull CLKSEL low. 3.1. Multiplexed Pins The CS493XX family of digital signal processors (DSPs) incorporate a large amount of flexibility into a 44 pin package. Because of the high degree 24 DS339PP4 CS49300 Family DSP name corresponding to their particular use. Sometimes GPIO[11:0], or some subset thereof, is used when referring to the pins in a general sense. filter circuit will be directly coupled into the PLL, which could affect performance. Reference Designator C1 C2 C3 R1 Value 2.2uF 220pF 10nF 200k Ohm Table 1. PLL Filter Component Values 3.2. Termination Requirements The CS493XX incorporates open drain pins which must be pulled high for proper operation. INTREQ (pin 20) is always an open drain pin which requires a pull-up for proper operation. When in the I2C serial communication mode, the SCDIO signal (pin 19) is open drain and thus requires a pull-up for proper operation. Due to the internal, multiplexed design of the pins, certain signals may or may not require termination depending on the mode being used. If a parallel host communication mode is not being used, GPIO[11:0] must be terminated or driven as these pins will come up as high impedance inputs and will be prone to oscillation if they are left floating. The specific termination requirements may vary since the state of some of the GPIO pins will determine the communication mode at the rising edge of reset (please see Section 6, "Control" on page 32 for more information). For the explicit termination requirements of each communication mode please see the typical connection diagrams. Generally a 4.7k Ohm resistor is recommended for open drain pins. The communication mode setting pins (please see Section 6, "Control" on page 32 for more information) should also be terminated with a 4.7k resistor. A 10k Ohm resistor is sufficient for the GPIO pins and unused inputs. 4. POWER The CS493XX requires a 2.5V digital power supply for the digital logic within the DSP and a 2.5V analog power supply for the internal PLL. There are three digital power pins, VD1, VD2 and VD3, along with three digital grounds, DGND1, DGND2 and DGND3. There is one analog power pin, VA and one analog ground, AGND. The DSP will perform at its best when noise has been eliminated from the power supply. The recommendations given below for decoupling and power conditioning of the CS493XX will help to ensure reliable performance. 4.1. Decoupling It is good practice to decouple noise from the power supply by placing capacitors directly between the power and ground of the CS493XX. Each pair of power pins (VD1/DGND, VD2/DGND, VD3/DGND, VA/AGND) should have its own decoupling capacitors. The recommended procedure is to place both a 0.1uF and a 1uF capacitor as close as physically possible to each power pin. The 0.1uF capacitor should be closest to the part (typically 5mm or closer). 3.3. Phase Locked Loop Filter The internal phase locked loop (PLL) of the CS493XX requires an external filter for successful operation. The topology of this filter is shown in the typical connection diagrams. The component values are shown below. Care should be taken when laying out the filter circuitry to minimize trace lengths and to avoid any close routing of high frequency signals. Any noise coupled on to the DS339PP4 4.2. Analog Power Conditioning In order to obtain the best performance from the CS493XX's internal PLL, the analog power supply (VA) must be as clean as possible. A ferrite bead should be used to filter the 2.5V power supply for the analog portion of the CS493XX. This power 25 CS49300 Family DSP +2.5 Supply (+2.5VD) NOTE: A capacitor pair (1 uF and 0.1 uF) must be supplied for each power pin. NOTE: +2.5VA is simply +2.5VD after filtering through the ferrite bead. Pin 32 must be referenced to +2.5VA FERRITE BEAD +2.5VA + 1 uF 0.1 uF + 1 uF 0.1 uF + 1 uF 0.1 uF + 1 uF 0.1 uF + 47 uF +2.5VD Resistor Pack 10k 3.3k 3.3k 10k 10k +2.5VD 3.3k 4.7k 4.7k 23 12 VD3 VD2 VD1 VA 37 38 34 1 DD DC MCLK SCLK 44 43 42 33 33 I2C INTERFACE MICROCONTROLLER 20 19 6 18 7 36 LRCLK INTREQ SCDIO AUDATA0 SCDIN AUDATA1 CS AUDATA2 SCCLK RESET CMPDAT CMPCLK CMPREQ DAC (S) 41 40 39 27 28 29 CS493XX 4 5 WR__GPIO10 DIR or ADC [S] OPT_TX SDATAN SCLKN RD__GPIO11 SLRCLKN 22 25 26 21 8 9 10 11 14 15 16 17 GPIO8 XMT958 GPIO7 GPIO6 CLKIN GPIO5 GPIO4 GPIO3 GPIO2 DGND1 DGND2 AGND 3 30 33 OSCILLATOR 10k CLKSEL FLT2 FLT1 31 32 33 GPIO1 GPIO0 DGND3 +2.5VA + C1 13 24 35 E M A D _ G P I O [8:0] 2 R1 3.3k C2 C3 Figure 13. I2C(R) Control 26 DS339PP4 CS49300 Family DSP +2.5V Supply (+2.5VD) NOTE: A capacitor pair (1 uF and 0.1 uF) must be supplied for each power pin. NOTE: +2.5VA is simply +2.5VD after filtering through the ferrite bead. Pin 32 must be referenced to +2.5VA FERRITE BEAD +2.5VA + 1 uF 0.1 uF + 1 uF 0.1 uF + 1 uF 0.1 uF + 1 uF 0.1 uF + 47 uF +2.5VD Resistor Pack 10k +2.5VD 3.3k 3.3k 3.3k 10k 4.7k 4.7k 10k 10k 23 12 VD3 VD2 VD1 VA 37 38 34 1 DD DC MCLK SCLK 44 43 42 33 33 SYSTEM MICRO CONTROLLER EXTERNAL ROM /CE /OE I2C INTERFACE 20 19 6 18 7 36 LRCLK INTREQ__ABOOT SCDIO AUDATA0 SCDIN AUDATA1 CS AUDATA2 SCCLK RESET CMPDAT CMPCLK DACs 41 40 39 27 28 29 CS493XX 4 5 WR__GPIO10 RD__EMOE CMPREQ DIR or ADCs OPT_TX SDATAN SCLKN SLRCLKN 22 25 26 21 8 9 EXTMEM XMT958 EMAD7 EMAD6 CLKIN EMAD5 EMAD4 EMAD3 EMAD2 DGND1 DGND2 AGND EMAD1 EMAD0 DGND3 FLT2 FLT1 CLKSEL 3 30 33 OCTAL F/F OCTAL F/F 10 11 14 OSCILLATOR 10k C3 31 32 33 A[15:8] Q[7:0] D[7:0] Q[7:0] D[7:0] EMAD[7:0] 15 16 17 +2.5VA + C1 A[7:0] D[7:0] 3.3k 13 24 35 2 R1 C2 Figure 14. I2C(R) Control with External Memory DS339PP4 27 CS49300 Family DSP +2.5V Supply (+2.5VD) NOTE: A capacitor pair (1 uF and 0.1 uF) must be supplied for each power pin. NOTE: +2.5VA is simply +2.5VD after filtering through the ferrite bead. Pin 32 must be referenced to +2.5VA FERRITE BEAD +2.5VA + 1 uF 0.1 uF + 1 uF 0.1 uF + 1 uF 0.1 uF + 1 uF 0.1 uF + 47 uF +2.5VD Resistor Pack 10k 3.3k +2.5VD 3.3k 3.3k 4.7k 4.7k 23 12 VD3 VD2 VD1 VA 37 38 34 1 DD DC MCLK SCLK 44 43 42 33 33 MICROCONTROLLER SPI INTERFACE 20 19 6 18 7 36 LRCLK INTREQ SCDOUT AUDATA0 SCDIN AUDATA1 CS AUDATA2 SCCLK RESET CMPDAT CMPCLK DACs 41 40 39 27 28 29 CS493XX 5 4 RD__GPIO11 CMPREQ DIR or ADCs OPT_TX SDATAN SCLKN WR__GPIO10 SLRCLKN 22 25 26 21 8 9 10 11 14 15 16 17 GPIO8 XMT958 GPIO7 GPIO6 CLKIN GPIO5 GPIO4 GPIO3 GPIO2 DGND1 DGND2 AGND 3 30 33 OSCILLATOR 10k CLKSEL FLT2 FLT1 31 32 33 +2.5VA + C1 GPIO1 GPIO0 13 24 35 E M A D _ G PIO [8:0] 2 DGND3 R1 3.3k C2 C3 Figure 15. SPI Control 28 DS339PP4 CS49300 Family DSP +2.5V Supply (+2.5VD) NOTE: A capacitor pair (1 uF and 0.1 uF) must be supplied for each power pin. NOTE: +2.5VA is simply +2.5VD after filtering through the ferrite bead. Pin 32 must be referenced to +2.5VA FERRITE BEAD +2.5VA + 1 uF 0.1 uF + 1 uF 0.1 uF + 1 uF 0.1 uF + 1 uF 0.1 uF + 47 uF +2.5VD Resistor Pack 10k +2.5VD 3.3k 3.3k 3.3k 4.7k 4.7k 10k 23 12 VD3 VD2 VD1 VA 37 38 34 1 DD DC MCLK SCLK 44 43 42 33 33 SYSTEM MICRO CONTROLLER SPI INTERFACE 20 19 6 18 7 36 LRCLK INTREQ__ABOOT SCDOUT AUDATA0 SCDIN AUDATA1 CS AUDATA2 SCCLK RESET CMPDAT CMPCLK DACs 41 40 39 27 28 29 EXTERNAL ROM /CE /OE CS493XX 5 4 RD__EMOE WR__GPIO10 CMPREQ DIR or ADCs OPT_TX SDATAN SCLKN SLRCLKN 22 25 26 21 8 9 EXTMEM XMT958 EMAD7 EMAD6 CLKIN EMAD5 EMAD4 EMAD3 EMAD2 DGND1 DGND2 AGND EMAD1 EMAD0 DGND3 FLT2 FLT1 CLKSEL 3 30 33 OCTAL F/F OCTAL F/F 10 11 14 OSCILLATOR 10k C3 31 32 33 A[15:8] Q[7:0] D[7:0] Q[7:0] D[7:0] E M A D [ 7 :0] 15 16 17 +2.5VA + C1 A[7:0] D[7:0] 3.3k 13 24 35 2 R1 C2 Figure 16. SPI Control with External Memory DS339PP4 29 CS49300 Family DSP +2.5V Supply (+2.5VD) NOTE: A capacitor pair (1 uF and 0.1 uF) must be supplied for each power pin. NOTE: +2.5VA is simply +2.5VD after filtering through the ferrite bead. Pin 32 must be referenced to +2.5V A FERRITE BEAD +2.5VA + 1 uF 0.1 uF + 1 uF 0.1 uF + 1 uF 0.1 uF + 1 uF 0.1 uF + 47 uF +2.5VD Resistor Pack 10k +2.5VD 10k 4.7k 3.3k 4.7k 3.3k 3.3k 23 12 VD3 VD2 VD1 VA 37 38 34 1 DD DC MCLK SCLK 44 43 42 33 33 MICROCONTROLLER INT INTERFACE 20 8 9 10 11 14 15 16 LRCLK INTREQ DATA7 AUDATA0 DATA6 AUDATA1 DATA5 AUDATA2 DATA4 DATA3 CMPDAT DATA2 CMPCLK DATA1 DATA0 GPIO8 DACs 41 40 39 27 28 29 DATA[7:0] 17 21 CS493XX CMPREQ DIR or ADCs OPT_TX SDATAN SCLKN 22 25 26 5 4 6 7 18 RD WR SLRCLKN XMT958 A1 A0 CLKIN CS 3 30 33 OSCILLATOR 10k 36 RESET CLKSEL FLT2 AGND 31 32 33 +2.5VA + C1 DGND1 DGND2 PSEL_GPIO9 DGND3 19 FLT1 3.3k 13 24 35 2 R1 C2 C3 Figure 17. Intel(R) Parallel Control Mode 30 DS339PP4 CS49300 Family DSP +2.5V Supply (+2.5VD) NOTE: A capacitor pair (1 uF and 0.1 uF) must be supplied for each power pin. NOTE: +2.5VA is simply +2.5VD after filtering through the ferrite bead. Pin 32 must be referenced to +2.5VA FERRITE BEAD +2.5VA + 1 uF 0.1 uF + 1 uF 0.1 uF + 1 uF 0.1 uF + 1 uF 0.1 uF + 47 uF +2.5VD Resistor Pack 10k +2.5VD 3.3k 4.7k 10k 4.7k 3.3k 3.3k 3.3k 12 VD3 VD2 VD1 VA 37 38 34 23 1 DD DC MCLK SCLK 44 43 42 33 33 MICROCONTROLLER MOT INTERFACE 20 8 9 10 11 14 15 16 LRCLK INTREQ DATA7 AUDATA0 DATA6 AUDATA1 DATA5 AUDATA2 DATA4 DATA3 CMPDAT DATA2 CMPCLK DATA1 DATA0 GPIO8 CMPREQ DACs 41 40 39 27 28 29 DATA[7:0] 17 21 CS493XX DIR or ADCs OPT_TX SDATAN SCLKN 22 25 26 19 5 4 PSEL_GPIO9 R/W__RD DS__WR SLRCLKN XMT958 3 6 7 18 A1 A0 CS CLKIN 30 33 OSCILLATOR 10k CLKSEL FLT2 AGND 31 32 33 +2.5VA + C1 DGND1 DGND2 RESET DGND3 36 FLT1 13 35 24 2 R1 C2 C3 Figure 18. Motorola(R) Parallel Control Mode DS339PP4 31 CS49300 Family DSP scheme is shown in the typical connection diagrams. even multiples of the desired sampling rate or with an already available clock source. Typically a 12.288 MHz CLKIN is used in this scenario so that the same oscillator can be used for the DSP and ADC. The clock manager is controlled by the DSP application software. The software user's guide for the application code being used should be referenced for what CLKIN input frequency is supported. 4.3. Ground For two layer applications, care should be taken to have sufficient ground between the DSP and parts in which it will be interfacing (DACs, ADCs, DIR, microcontrollers, external memory etc). If there is not sufficient ground, a potential will be seen between the ground reference of the DSP and the interface parts and the noise margin will be significantly reduced potentially causing communication or data integrity problems. 6. CONTROL 4.4. Pads The CS493XX incorporate 3.3V tolerant pads. This means that while the CS493XX power supplies require 2.5 volts, 3.3 volt signals can be applied to the inputs without damaging the part. 5. CLOCKING The CS493XX clock manager incorporates a programmable phase locked loop (PLL) clock synthesizer. The PLL takes an input reference clock and produces all the internal clocks required to run the internal DSP and to provide master mode timing to the audio input/output peripherals. The clock manager also includes a 33-bit system time clock (STC) to support audio and video synchronization. The PLL can be internally bypassed by connecting the CLKSEL pin to VD. This connection multiplexes the CLKIN pin directly to the DSP clock. Care should be taken to note the minimum CLKIN requirements when bypassing the PLL. The PLL reference clock has three possible sources that are routed through a multiplexer controlled by the DSP: SCLKN2, SCLKN1, and CLKIN. Typically, in audio/video environments like set-top boxes, the CLKIN pin is connected to 27 MHz. In other scenarios such as an A/V receiver design, the PLL can be clocked through the CLKIN pin with 32 Control of the CS493XX can be accomplished through one of four methods. The CS493XX supports I2C(R) and SPI serial communication. In addition the CS493XX supports both a Motorola and Intel byte wide parallel host control mode. Only one of the four communication modes can be selected for control. The states of the RD, WR, and PSEL pins are sampled at the rising edge of RESET to determine the interface type as shown in Table 2. RD (Pin 5) 1 1 0 1 WR (Pin 4) 1 1 1 0 PSEL (Pin 19) 1 0 X X Table 2. Host Modes Host Interface Mode 8-bit Motorola(R) 8-bit Intel(R) Serial I2C(R) Serial SPI Whichever host communication mode is used, host control of the CS493XX is handled through the application software running on the DSP. Configuration and control of the CS493XX decoder and its peripherals are indirectly executed through a messaging protocol supported by the downloaded application code. In other words successful communication can only be accomplished by following the low level hardware communication format and high level messaging protocol. The specifications of the messaging protocol can be found in any of the software user's guides. DS339PP4 CS49300 Family DSP Only the subsection describing the communication mode being used needs to be read by the system designer. SPI START: CS (LOW) 6.1. Serial Communication The CS493XX has a serial control port that supports both SPI and I2C(R) forms of communication. The following sections will explain each communication mode in more detail. Flow diagrams will illustrate read and write cycles. Timing diagrams will be shown to demonstrate relative edge positions of signal transitions for read and write operations. WRITE ADDRESS BYTE WITH MODE BIT SET TO 0 FOR WRITE SEND DATABYTE Y MORE DATA? N 6.1.1. SPI Communication SPI communication with the CS493XX is accomplished with 5 communication lines: chip select, serial control clock, serial data in, serial data out and an interrupt request line to signal that the DSP has data to transmit to the host. Table 3 shows the mnemonic, pin name, and pin number of each of these signals on the CS493XX. Mnemonic Chip Select Serial Clock Serial Data In Serial Data Out Interrupt Request Pin Name CS SCCLK SCDIN SCDOUT INTREQ Pin Number 18 7 6 19 20 CS (HIGH) Figure 19. SPI Write Flow Diagram 1) An SPI transfer is initiated when chip select (CS) is driven low. 2) This is followed by a 7-bit address and the read/write bit set low for a write. The address for the CS493XX defaults to 0000000b. It is necessary to clock this address in prior to any transfer in order for the CS493XX to accept the write. In other words a byte of 0x00 should be clocked into the device preceding any write. The 0x00 byte represents the 7 bit address 0000000b, and the least significant bit set to 0 to designate a write. 3) The host should then clock data into the device most significant bit first, one byte at a time. The data byte is transferred to the DSP on the falling edge of the eighth serial clock. For this reason, the serial clock should be default low so that eight transitions from low to high to low will occur for each byte. 4) When all of the bytes have been transferred, chip select should be raised to signify an end of Table 3. SPI Communication Signals 6.1.1.1.Writing in SPI When writing to the device in SPI the same protocol will be used whether writing a byte, a message or even an entire executable download image. The examples shown in this document can be expanded to fit any write situation. Figure 19, "SPI Write Flow Diagram" on page 33 shows a typical write sequence: The following is a detailed description of an SPI write sequence with the CS493XX. DS339PP4 33 CS49300 Family DSP write. Once again it is crucial that the serial clock transitions from high to low on the last bit of the last byte before chip select is raised, or a loss of data will occur. The same write routine could be used to send a single byte, message or an entire application code image. From a hardware perspective, it makes no difference whether communication is by byte or multiple bytes of any length as long as the correct hardware protocol is followed. INTREQ LOW? YES CS (LOW) NO 6.1.1.2.Reading in SPI A read operation is necessary when the CS493XX signals that it has data to be read. The CS493XX does this by dropping its interrupt request line (INTREQ) low. When reading from the device in SPI, the same protocol will be used whether reading a single byte or multiple bytes. The examples shown in this document can be expanded to fit any read situation. Figure 20, "SPI Read Flow Diagram" on page 34 shows a typical read sequence: The following is a detailed description of an SPI read sequence with the CS493XX. 1) An SPI read transaction is initiated by the CS493XX dropping INTREQ, signaling that it has data to be read. 2) The host responds by driving chip select (CS) low. 3) This is followed by a 7-bit address and the read/write bit set high for a read. The address for the CS493XX defaults to 0000000b. It is necessary to clock this address in prior to any transfer in order for the CS493XX to acknowledge the read. In other words a byte of 0x01 should be clocked into the device preceding any read. The 0x01 byte represents the 7 bit address 0000000b, and the least significant bit set to 1 to designate a read. 4) After the falling edge of the serial control clock WRITE ADDRESS BYTE WITH MODE BIT SET TO 1 FOR READ READ DATA BYTE YES INTREQ STILL LOW? NO CS (HIGH) Figure 20. SPI Read Flow Diagram (SCCLK) for the read/write bit, the data is ready to be clocked out on the control data out pin (CDOUT). Data clocked out by the host is valid on the rising edge of SCCLK and data transitions occur on the falling edge of SCCLK. The serial clock should be default low so that eight transitions from low to high to low will occur for each byte. 5) If INTREQ is still low, another byte should be clocked out of the CS493XX. Please see the discussion below for a complete description of INTREQ behavior. 6) When INTREQ has risen, the chip select line of the CS493XX should be raised to end the read 34 DS339PP4 CS49300 Family DSP transaction. Understanding the role of INTREQ is important for successful communication. INTREQ is guaranteed to remain low (once it has gone low) until the second to last rising edge of SCCLK of the last byte to be transferred out of the CS493XX. If there is no more data to be transferred, INTREQ will go high at this point. For SPI this is the rising edge for the second to last bit of the last byte to be transferred. After going high, INTREQ is guaranteed to stay high until the next rising edge of SCCLK. This end of transfer condition signals the host to end the read transaction by clocking the last data bit out and raising CS. If INTREQ is still low after the second to last rising edge of SCCLK, the host should continue reading data from the serial control port. It should be noted that all data should be read out of the serial control port during one cycle or a loss of data will occur. In other words, all data should be read out of the chip until INTREQ signals the last byte by going high as described above. Please see Section 6.1.3, "INTREQ Behavior: A Special Case" on page 39 for a more detailed description of INTREQ behavior. Figure 21, "SPI Timing" on page 36 timing diagram shows the relative edges of the control lines for an SPI read and write. page 35 shows the mnemonic, pin name, and pin number of each of these signals on the CS493XX. Mnemonic Serial Clock Bi-Directional Data Interrupt Request Pin Name SCCLK SCDIO INTREQ Pin Number 7 19 20 Table 4. I2C(R) Communication Signals Typically in I2C(R) communication SCDIO is an open drain line with a pull-up. A logic one is placed on the line by three-stating the output and allowing the pull-up to raise the line. At this point another device can drive the line low if necessary. Threestating SCDIO can have two effects: 1. To send out a one when writing data or sending a "no acknowledge"; 2. release the line when another chip is writing data. 6.1.2.1.Writing in I2C(R) When writing to the device in I2C(R) the same protocol will be used whether writing a byte, a message or even an application code image. The examples shown in this document can be expanded to fit any write situation. Figure 23 shows a typical write sequence: The following is a detailed description of an I2C(R) write sequence with the CS493XX. 1) An I2C(R) transfer is initiated with an I2C(R) start condition which is defined as the data (SCDIO) line falling while the clock (SCCLK) is held high. 2) Next a 7-bit address with the read/write bit set low for a write should be sent to the CS493XX. The address for the CS493XX defaults to 0000000b. It is necessary to clock this address in prior to any transfer in order for the CS493XX to accept the write. In other words a byte of 0x00 should be clocked into the device preceding any write. The 0x00 byte represents the 7 bit of address (0000000b) and the read/write bit set to 0 to designate a write. 35 6.1.2. I2C Communication I2C communication with the CS493XX is accomplished with 3 communication lines: serial control clock, a bi-directional serial data input/output line and an interrupt request line to signal that the DSP has data to transmit to the host. See Figure 4, "I2C(R) Communication Signals" on DS339PP4 36 D7 D6 D5 D4 D3 D2 D1 D0 D7 D6 D5 D4 D3 D2 D1 D0 D7 D6 D5 D4 D3 D2 D1 D0 SCCLK SCDIN AD 6 A D 5 A D 4 AD 3 AD 2 AD 1 A D 0 R /W CS S P I W r ite F u n c tio n a l T im in g SCCLK SCDIN D7 D6 D5 D4 D3 D2 D1 D0 D7 D6 D5 D4 D3 D2 D1 D0 D7 D6 A D 6 A D 5 A D 4 A D 3 A D 2 A D 1 A D 0 R /W D5 D4 D3 D2 D1 D0 SCDOUT CS INTREQ S P I R e a d F u n c tio n a l T im in g Note 1 Note 2 Notes: 1. INTREQ is guaranteed to stay LOW until the rising edge of SCCLK for bit D1 of the last byte to be transferred out of the CS493XX. 2. INTREQ is guaranteed to remain HIGH until the next rising edge of SCCLK at which point it may go LOW again if there is new data to be read. The condition of INTREQ going LOW at this point should be treated as a new read condition. After a stop condition, a new start condition and an address byte should be sent CS49300 Family DSP DS339PP4 Figure 21. SPI Timing CS49300 Family DSP 3) After each byte (including the address and each data byte) the host must release the data line and provide a ninth clock for the CS493XX to acknowledge. The CS493XX will drive the data line low during the ninth clock to acknowledge. If for some reason the CS493XX does not acknowledge, it means that the last byte sent was not received and should be resent. If the resent byte fails to produce an acknowledge, a stop condition should be sent and the device should be reset. 4) The host should then clock data into the device most significant bit first, one byte at a time. The SEND I2C START: DROP SCDIO LOW WHILE SCCLK IS HIGH CS493XX will (and must) acknowledge each byte that it receives which means that after each byte the host must provide an acknowledge clock pulse on SCCLK and release the data line, SCDIO. 5) At the end of a data transfer a stop condition must be sent. The stop condition is defined as the rising edge of SCDIO while SCCLK is high. 6.1.2.2.Reading in I2C(R) A read operation is necessary when the CS493XX signals that it has data to be read. It does this by dropping its interrupt request line (INTREQ) low. When reading from the device in I2C(R), the same protocol will be used whether reading a single byte or multiple bytes. The examples shown in this document can be expanded to fit any read situation. Figure 23 shows a typical I2C(R) read sequence 1) An I2C(R) read transaction is initiated by the CS493XX dropping INTREQ, signaling that it has data to be read. 2) The host responds by sending an I2C(R) start condition which is SCDIO dropping while SCCLK is held high. 3) The start condition is followed by a 7-bit address and the read/write bit set high for a read. The address for the CS493XX defaults to 0000000b. It is necessary to clock this address in prior to any transfer in order for the CS493XX to acknowledge the read. In other words a byte of 0x01 should be clocked into the device preceding any read. The 0x01 byte represents the 7 bit address 0000000b and a read/write bit set to 1 to designate a read. 4) After the falling edge of the serial control clock (SCCLK) for the read/write bit of the address byte, an acknowledge must be read in by the host. The CS493XX will drive SCDIO low to acknowledge the address byte and to indicate that it is ready for a read operation. If an 37 WRITE ADDRESS BYTE WITH MODE BIT SET TO 0 FOR WRITE GET ACK SEND DATABYTE GET ACK MORE DATA? N I2C STOP: RAISE SCDIO HIGH WHILE SCCLK IS HIGH Y Figure 22. I2C(R) Write Flow Diagram DS339PP4 CS49300 Family DSP acknowledge is not sent by the CS493XX, a stop condition should be issued and the read sequence should be restarted. 5) The data is ready to be clocked out on the SCDIO line at this point. Data clocked out by the host is valid on the rising edge of SCCLK and data transitions occur on the falling edge of SCCLK. 6) If INTREQ is still low after a byte transfer, an acknowledge (SCDIO clocked low by SCCLK) must be sent by the host to the CS493XX and another byte should be clocked out of the CS493XX. Please see the discussion below for a complete description of INTREQ's behavior. 7) When INTREQ has risen, a no acknowledge should be sent by the host (SCDIO clocked high by the host) to the CS493XX. This, followed by an I2C(R) stop condition (SCDIO raised, while SCCLK is high) signals an end of read to the CS493XX. Understanding the role of INTREQ is important for successful communication. INTREQ is guaranteed to remain low (once it has gone low), until the rising edge of SCCLK for the last bit of the last byte to be transferred out of the CS493XX (i.e. the rising edge of SCCLK before the ACK SCCLK). If there is no more data to be transferred, INTREQ will go high at this point. After going high, INTREQ is guaranteed to stay high until the next rising edge of SCCLK (i.e. it will stay high until the rising edge of SCCLK for the ACK/NACK bit). This end of transfer condition signals the host to end the read transaction by clocking the last data bit out of the CS493XX and then sending a no acknowledge to the CS493XX to signal that the read sequence is over. At this point the host should send an I2C(R) stop condition to complete the read sequence. If INTREQ is still low after the rising edge of SCCLK on the last data bit of the current byte, the host should send an acknowledge and continue reading data from the serial control port. It should be noted that all data should be read out of the serial control port during one cycle or a loss of data will occur. In other words, all data should be read out of the chip until INTREQ signals the last byte by going high as described above. Please see Section 6.1.3, "INTREQ Behavior: A Special Case" on page 39 for a more detailed description of INTREQ behavior. INTREQ LOW? YES SEND I2C START: DROP SCDIO LOW WHILE SCCLK IS HIGH NO WRITE ADDRESS BYTE WITH MODE BIT SET TO 1 FOR READ GET ACK READ DATABYTE YES INTREQ STILL LOW? NO SEND NACK SEND ACK SEND I2C STOP: RISING EDGE OF SCDIO WHILE SCLK IS HIGH Figure 23. I2C(R) Read Flow Diagram 38 DS339PP4 CS49300 Family DSP The timing diagram in Figure 24, "I2C(R) Timing" on page 40 shows the relative edges of the control lines for an I2C(R) read and write. high for one period of SCCLK and then goes low again before the end of the read cycle. In case (1) the host should perform a read operation as discussed in the previous sections. In case (2) an unsolicited message arrives before the second to last SCCLK of the final byte transfer of a read, forcing the INTREQ pin to remain low. In this scenario the host should continue to read from the CS493XX without a stop/start condition or data will be lost. In case (3) an unsolicited message arrives between the second to last SCCLK and the last SCCLK of the final byte transfer of a read. In this scenario, INTREQ will transition high for one clock (as if the read transaction has ended), and then back low (indicating that more data has queued). This final case is the most complicated and shall be explained in detail. There are two constraints which completely characterize the behavior of the INTREQ pin during a read. The first constraint is that the INTREQ pin is guaranteed to remain low until the second to last SCCLK (SCCLK number N-1) of the final byte being transferred from the CS493XX (not necessarily the second to last bit of the data byte). The second constraint is that once the INTREQ pin has gone high it is guaranteed to remain high until the rising edge of the last SCCLK (SCCLK number N) of the final byte being transferred from the CS493XX (not necessarily the last bit of the data byte). If an unsolicited message arrives in the window of time between the rising edge of the second to last SCCLK and the final SCCLK, INTREQ will drop low on the rising edge of the final SCCLK as illustrated in the functional timing diagrams shown for I2C(R) and SPI read cycles. INTREQ behavior for I2C(R) communication is illustrated in Figure 24, "I2C(R) Timing" on page 40. When using I2C(R) communication the INTREQ pin will remain low until the rising edge of SCCLK 39 6.1.3. INTREQ Behavior: A Special Case When communicating with the CS493XX there are two types of messages which force INTREQ to go low. These messages are known as solicited messages and unsolicited messages. For more information on the specific types of messages that require a read from the host, one of the application code user's guides should be referenced. In general, when communicating with the CS493XX, INTREQ will not go low unless the host first sends a read request command message. In other words the host must solicit a response from the DSP. In this environment, the host must read from the CS493XX until INTREQ goes high again. Once the INTREQ pin has gone high it will not be driven low until the host sends another read request. When unsolicited messages, such as those used for Autodetect, have been enabled, the behavior of INTREQ is noticeably different. The CS493XX will drop the INTREQ pin whenever the DSP has an outgoing message, even though the host may not have requested data. There are three ways in which INTREQ can be affected by an unsolicited message: 1) During normal operation, while INTREQ is high, the DSP could drop INTREQ to indicate an outgoing message, without a prior read request. 2) The host is in the process of reading from the CS493XX, meaning that INTREQ is already low. An unsolicited message arrives which forces INTREQ to remain low after the solicited message is read. 3) The host is reading from the CS493XX when the unsolicited message is queued, but INTREQ goes DS339PP4 40 I 2 C Stop D7 D6 D5 D4 D3 D2 D1 D0 AC K D 7 D6 D5 D4 D3 D2 D1 D0 AC K D7 D6 D5 D4 D3 D2 D1 D0 A CK I 2 C Start SCCLK SCDIO A D6 A D5 A D 4 A D3 A D 2 A D 1 A D 0 R/W A C K I 2 C W rite Functional Tim ing I 2 C Start I 2 C Stop SCCLK AC K D7 D6 D5 D4 D3 D2 D1 D0 ACK D7 D6 D5 D4 D3 D2 D1 D0 ACK D7 D6 D5 D4 D3 D2 D1 D0 NA CK SCDIO AD 6 AD 5 A D4 A D3 A D 2 A D1 A D0 R /W INTREQ Note 1 Note 2 Note 3 Note 4 Note 5 I 2 C Read Functional Tim ing Notes: 1. The ACK for the address byte is driven by the CS493XX. 2. The ACKs for the data bytes being read from the CS493XX should be driven by the host. 3. INTREQ is guaranteed to stay LOW until the rising edge of SCCLK for bit D0 of the last byte to be transferred out of the CS493XX. 4. A NACK should be sent by the host after the last byte to indicate the end of the read cycle. 5. INTREQ is guaranteed to stay HIGH until the next rising edge of SCCLK (for the ACK/NACK bit) at which point it may go LOW again if there is new data to be read. The condition of INTREQ going LOW at this point should be treated as a new read condition. After a stop condition, a new start condition followed by an address byte should be sent. CS49300 Family DSP DS339PP4 Figure 24. I2C(R) Timing CS49300 Family DSP for the data bit D0 (SCCLK N-1), but it can go low at the rising edge of SCCLK for the NACK bit (SCCLK N) if an unsolicited message has arrived. If no unsolicited messages arrive, the INTREQ pin will remain high after rising. INTREQ behavior for SPI communication is illustrated in Figure 21, "SPI Timing" on page 36. When using SPI communication, the INTREQ pin will remain low until the rising edge of SCCLK for the data bit D1 (SCCLK N-1), but it can go low at the rising edge of SCCLK for data bit D0 (SCCLK N) if an unsolicited message has arrived. If no unsolicited messages arrive, the INTREQ pin will remain high after rising. Ideally, the host will sample INTREQ on the falling edge of SCCLK number N-1 of the final byte of each read response message. If INTREQ is sampled high, the host should conclude the current read cycle using the stop condition defined for the communication mode chosen. The host should then begin a new read cycle complete with the appropriate start condition and the chip address. If INTREQ is sampled low, the host should continue reading the next message from the CS493XX without ending the current read cycle. When using automated communication ports, however, the host is often limited to sampling the status of INTREQ after an entire byte has been transferred. In this situation a low-high-low transition (case 3) would be missed and the host will see a constantly low INTREQ pin. Since the host should read from the CS493XX until it detects that INTREQ has gone high, this condition will be treated as a multiple-message read (more than one read response is provided by the CS493XX). Under these conditions a single byte of 0x00 will be read out before the unsolicited message. The length of every read response is defined in the user's manual for each piece of application code. Thus, the host should know how many bytes to expect based on the first byte (the OPCODE) of a DS339PP4 read response message. It is guaranteed that no read responses will begin with 0x00, which means that a NULL byte (0x00) detected in the OPCODE position of a read response message should be discarded. Please see an Application Code User's Guide for an explanation of the OPCODE. It is important that the host be aware of the presence of NULL bytes, or the communication channel could become corrupted. When case (3) occurs and the host issues a stop condition before starting a new read cycle, the first byte of the unsolicited message is loaded directly into the shift register and 0x00 is never seen. Alternatively, if case (3) occurs and the host continues to read from the CS493XX without a stop condition (a multiple message read), the 0x00 byte must be shifted out of the CS493XX before the first byte of the unsolicited message can be read. In other words, if a system can only sample INTREQ after an entire byte transfer the following routine should be used if INTREQ is low after the last byte of the message being read: 1) Read one byte 2) If the byte = 0x00 discard it and skip to step 3. If the byte != 0x00 then it is the OPCODE for the next message. For this case skip to step 4. 3) Read one more byte. This is the OPCODE for the next message. 4) Read the rest of the message as indicated in the previous sections. 6.2. Parallel Host Communication The parallel host communication modes of the CS493XX provide an 8-bit interface to the DSP. An Intel-style parallel mode and a Motorola-style parallel mode are supported. The host interface is implemented using four communication registers within the CS493XX as shown in Table 5, "Parallel Input/Output Registers," on page 42. 41 CS49300 Family DSP Host Message (HOSTMSG) Register, A[1:0] = 00b 7 HOSTMSG7 6 HOSTMSG6 5 HOSTMSG5 4 HOSTMSG4 3 HOSTMSG3 2 HOSTMSG2 1 HOSTMSG1 0 HOSTMSG0 HOSTMSG7-0 Host data to and from the DSP. A read or write of this register operates handshake bits between the internal DSP and the external host. This register typically passes multibyte messages carrying microcode, control, and configuration data. HOSTMSG is physically implemented as two independent registers for input and output (read and write). Host Control (CONTROL) Register, A[1:0] = 01b 7 Reserved 6 CMPRST 5 PCMRST 4 MFC 3 MFB 2 HINBSY 1 HOUTRDY 0 Reserved Reserved CMPRST Always write a 0 for future compatibility. When set, initializes the CMPDATA compressed data input channel. Writing a one to this bit holds the port in reset. Writing zero enables the port. This bit must be low for normal operation. (Write only) When set, initializes the PCMDATA linear PCM input channel. Writing a one to this bit holds the port in reset. Writing zero enables the port. This bit must be low for normal operation. (Write only) When high, indicates that the PCMDATA input buffer is almost full. (read only) When high, indicates that the CMPDATA input buffer is almost full. (read only) Set when the host writes to HOSTMSG. Cleared when the DSP reads data from the HOSTMSG register. The host reads this bit to determine if the last host byte written has been read by the DSP. (Read only) Set when the DSP writes to the HOSTMSG register. Cleared when the host reads data from the HOSTMSG register. The DSP reads this bit to determine if the last DSP output byte has been read by the host. (read only) Always write a 0 for future compatibility. PCMRST MFC MFB HINBSY HOUTRDY Reserved PCM Data Input (PCMDATA) Register, A[1:0] = 10b 7 PCMDATA7 6 PCMDATA6 5 PCMDATA5 4 PCMDATA4 3 PCMDATA3 2 PCMDATA2 1 PCMDATA1 0 PCMDATA0 PCMDATA7-0 The host writes PCM data to the DSP input buffer at this address. (Write only) Compressed Data Input (CMPDATA) Register, A[1:0] = 11b 7 CMPDATA7 6 CMPDATA6 5 CMPDATA5 4 CMPDATA4 3 CMPDATA3 2 CMPDATA2 1 CMPDATA1 0 CMPDATA0 CMPDATA7-0 The host writes compressed data to the DSP input buffer at this address. (Write only) Table 5. Parallel Input/Output Registers 42 DS339PP4 CS49300 Family DSP When the host is downloading code to the CS493XX or configuring the application code, control messages will be written to (and read from) the Host Message register. The Host Control register is used during messaging sessions to determine when the CS493XX can accept another byte of control data, and when the CS493XX has an outgoing byte that may be read. The PCM Data and Compressed Data registers are used strictly for the transfer of audio data. The host cannot read from these two registers. Audio data written to registers 11b and 10b are transferred directly to the internal FIFOs of the CS493XX. When the level of the PCM FIFO reaches the FIFO threshold level, the MFC bit of the Host Control register will be set. When the level of the Compressed Data FIFO reaches the FIFO threshold level, the MFB bit of the Host Control register will be set. It is important to remember that the parallel host interface requires the DATA[7:0] pins of the CS493XX. The external memory interface also requires the DATA[7:0] pins so the Parallel host control modes can only be used if external memory is not required. A detailed description for each parallel host mode will now be given. The following information will be provided for the Intel mode and Motorola mode: The pins of the CS493XX which must be used for proper communication * Flow diagram and description for a parallel byte write * Flow diagram and description for a parallel byte read The four registers of the CS493XX's parallel host mode are not used identically. The algorithm used for communicating with each register will be given as a functional description, building upon the basic read and write protocols defined in the Motorola and Intel sections. The following will be covered: * * * Flow diagram and description for a control write Flow diagram and description for a control read 6.2.1. Intel Parallel Host Communication Mode The Intel parallel host communication mode is implemented using the pins given in Table 6. The INTREQ pin is controlled by the application code when a parallel host communication mode has been selected. When the code supports INTREQ notification, the INTREQ pin is asserted whenever the DSP has an outgoing message for the host. This same information is reflected by the HOUTRDY bit of the Host Control Register (A[1:0] = 01b). INTREQ is useful for informing the host of unsolicited messages. An unsolicited message is defined as a message generated by the DSP without an associated host read request. Unsolicited messages can be used to notify the host of Mnemonic Chip Select Write Enable Output Enable Register Address Bit 1 Register Address Bit 0 Interrupt Request DATA7 DATA6 DATA5 DATA4 DATA3 DATA2 DATA1 DATA0 Pin Name CS WR RD A1 A0 INTREQ DATA7 DATA6 DATA5 DATA4 DATA3 DATA2 DATA1 DATA0 Pin Number 18 4 5 6 7 19 8 9 10 11 14 15 16 17 Table 6. Intel Mode Communication Signals conditions such as a change in the incoming audio data type (e.g. PCM --> AC-3). DS339PP4 43 CS49300 Family DSP 6.2.1.1.Writing a Byte in Intel Mode Information provided in this section is intended as a functional description of how to write control information to the CS493XX. The system designer must insure that all of the timing constraints of the Intel Parallel Host Mode Write Cycle are met. The flow diagram shown in Figure 24 illustrates the sequence of events that define a one-byte write in Intel mode. The protocol presented in Figure 24 will now be described in detail. 1) The host must first drive the A1 and A0 register address pins of the CS493XX with the address of the desired Parallel I/O Register. Host Message: Host Control: PCMDATA: CMPDATA: A[1:0]==00b. A[1:0]==01b. A[1:0]==10b. A[1:0]==11b. the host ends the write cycle by driving the CS and WR pins high. 6.2.1.2.Reading a Byte in Intel Mode Information provided in this section is intended as a functional description of how to write control information to the CS493XX. The system designer must insure that all of the timing constraints of the Intel Parallel Host Mode Read Cycle are met. The flow diagram shown in Figure 25 illustrates the sequence of events that define a one-byte read in Intel mode. The protocol presented in Figure 25 will now be described in detail. 1) The host must first drive the A1 and A0 register address pins of the CS493XX with the address of the desired Parallel I/O Register. Note that only the Host Message register and the Host Control register can be read. Host Message: Host Control: A[1:0]==00b. A[1:0]==01b. 2) The host then indicates that the selected register will be written. The host initiates a write cycle by driving the CS and WR pins low. 3) The host drives the data byte to the DATA[7:0] pins of the CS493XX. 4) Once the setup time for the write has been met, ADDRESS A PARALLEL I/O REGISTER (A[1:0] SET APPROPRIATELY 2) The host now indicates that the selected register will be read. The host initiates a read cycle by driving the CS and RD pins low. 3) Once the data is valid, the host can read the value of the selected register from the DATA[7:0] pins of the CS493XX. ADDRESS A PARALLEL I/O REGISTER (A[1:0] SET APPROPRIATELY C S (LO W ) W R (LO W ) C S (LO W ) R D (LO W ) WRITE BYTE TO DATA [7:0] READ BYTE FROM DATA [7:0] CS (HIGH) WR (HIGH) CS (HIGH) RD (HIGH) Figure 24. Intel Mode, One-Byte Write Flow Diagram Figure 25. Intel Mode, One-Byte Read Flow Diagram DS339PP4 44 CS49300 Family DSP 4) The host should now terminate the read cycle by driving the CS and RD pins high. must insure that all of the timing constraints of the Motorola Parallel Host Mode Write Cycle are met. The flow diagram shown in Figure 26 illustrates the sequence of events that define a one-byte write in Motorola mode. The protocol presented in Figure 26 will now be described in detail. 1) The host must drive the A1 and A0 register address pins of the CS493XX with the address of the address of the desired Parallel I/O Register. Host Message: Host Control: PCMDATA: CMPDATA: A[1:0]==00b. A[1:0]==01b. A[1:0]==10b. A[1:0]==11b. 6.2.2. Motorola Parallel Host Communication Mode The Motorola parallel host communication mode is implemented using the pins given in Table 7. The INTREQ pin is controlled by the application code when a parallel host communication mode has been selected. When the code supports INTREQ notification, the INTREQ pin is asserted whenever the DSP has an outgoing message for the host. This same information is reflected by the HOUTRDY bit of the Host Control Register (A[1:0] = 01b). INTREQ is useful for informing the host of unsolicited messages. An unsolicited message is defined as a message generated by the DSP without an associated host read request. Unsolicited messages can be used to notify the host of conditions such as a change in the incoming audio data type (e.g. PCM --> AC-3) Mnemonic Chip Select Data Strobe Read or Write Select Register Address Bit 1 Register Address Bit 0 Interrupt Request DATA7 DATA6 DATA5 DATA4 DATA3 DATA2 DATA1 DATA0 Pin Name CS DS R/W A1 A0 INTREQ DATA7 DATA6 DATA5 DATA4 DATA3 DATA2 DATA1 DATA0 Pin Number 18 4 5 6 7 19 8 9 10 11 14 15 16 17 The host indicates that this is a write cycle by driving the R/W pin low. 2) The host initiates a write cycle by driving the CS and DS pins low. 3) The host drives the data byte to the DATA[7:0] pins of the CS493XX. 4) Once the setup time for the write has been met, R/W (LOW) ADDRESS A PARALLEL I/O REGISTER (A[1:0] SET APPROPRIATELY C S (L O W ) D S (LO W ) WRITE BYTE TO DATA [7:0] Table 7. Motorola Mode Communication Signals 6.2.2.1.Writing a Byte in Motorola Mode Information provided in this section is intended as a functional description of how to write control information to the CS493XX. The system designer DS339PP4 CS (HIGH) DS (HIGH) Figure 26. Motorola Mode, One-Byte Write Flow Diagram 45 CS49300 Family DSP the host ends the write cycle by driving the CS and DS pins high. 4) The host should now terminate the read cycle by driving the CS and DS pins high. 6.2.2.2.Reading a Byte in Motorola Mode The flow diagram shown in Figure 27 illustrates the sequence of events that define a one-byte read in Motorola mode. The protocol presented Figure 27 will now be described in detail. 1) The host must drive the A1 and A0 register address pins of the CS493XX with the address of the desired Parallel I/O Register. Note that only the Host Message register and the Host Control register can be read. Host Message: Host Control: A[1:0]==00b. A[1:0]==01b. 6.2.3. Procedures for Parallel Host Mode Communication 6.2.3.1.Control Write in a Parallel Host Mode When writing control data to the CS493XX, the same protocol is used whether the host is writing a control message or an entire executable download image. Messages sent to the CS493XX should be written most significant byte first. Likewise, downloads of the application code should also be performed most significant byte first. The example shown in this section can be generalized to fit any control write situation. The generic function `Read_Byte_*()' is used in the following example as a generalized reference to either Read_Byte_MOT() or Read_Byte_INT(), and `Write_Byte_*()' is a generic reference to Write_Byte_MOT() or Write_Byte_INT(). Figure 28 shows a typical write sequence. The protocol presented in Figure 28 will now be described in detail. 1) When the host is communicating with the CS493XX, the host must verify that the DSP is ready to accept a new control byte. If the DSP is in the midst of an interrupt service routine, it will be unable to retrieve control data from the Host Message Register. Please note that `Read_Byte_*()' and `Write_Byte_*()' are generic references to either the Intel or Motorola communication protocol. If the most recent control byte has not yet been read by the DSP, the host must not write a new byte. 2) In order to determine whether the CS493XX is ready to accept a new control byte the host must check the HINBSY bit of the Host Control Register (bit 2). If HINBSY is high, then the DSP is not prepared to accept a new control The host indicates that this is a read cycle by driving the R/W pin high. 2) The host initiates the read cycle by driving the CS and DS pins low. 3) Once the data is valid, the host can read the value of the selected register from the DATA[7:0] pins of the CS493XX. R/W (HIGH) ADDRESS A PARALLEL I/O REGISTER (A[1:0] SET APPROPRIATELY C S (L O W ) D S (L O W ) READ BYTE FROM D A TA [7:0] CS (HIGH) DS (HIGH) Figure 27. Motorola Mode, One-Byte Read Flow Diagram 46 DS339PP4 CS49300 Family DSP byte, and the host should poll the Host Control Register again. If HINBSY is low, then the host may write a control byte into the Host Message Register. 3) The host knows that the DSP is ready for a new control byte at this point and should write the control byte to the Host Message Register (A[1:0] = 00b). 4) If the host would like to write any more control bytes to the CS493XX, the host should once again poll the Host Control Register (return to step 1). byte response from the DSP. The host must read the response byte and act accordingly. The boot procedure is discussed in Section 8.1, "Host Boot" on page 52. During regular operation (at run-time), the responses from the CS493XX will always be 6 bytes in length. The example shown in this section can be used for any control read situation. The generic function `Read_Byte_*()' is used in the following example as a generalized reference to either Read_Byte_MOT() or Read_Byte_INT(). Figure 29 shows a typical read sequence. The protocol presented in Figure 29 will now be described in detail. 1) Optionally, INTREQ going low may be used as an interrupt to the host to indicate that the CS493XX has an outgoing message. Even with the use of INTREQ, HOUTRDY must be checked to insure that bytes are ready for the host during the read process. Please note that INTREQ does not go low to indicate an outgoing message during boot. 2) The host reads the Host Control Register (A[1:0] = 01b) in order to determine the state of the communication interface. Please note that `Read_Byte_*()' is a generalized reference to either Read_Byte_MOT() or Read_Byte_INT(). 3) In order to determine whether the CS493XX has an outgoing control byte that is valid, the host must check the HOUTRDY bit of the Host Control Register (bit 1). If HOUTRDY is high, then the Host Message Register contains a valid message byte for the host. If HOUTRDY is low, then the DSP has not placed a new control byte in the Host Message Register, and the host should poll the Host Control Register again. 4) The host knows that the DSP is ready to provide a new response byte at this point. The 6.2.3.2.Control Read in a Parallel Host Mode When reading control data from the CS493XX, the same protocol is used whether the host is reading a single byte or a 6 byte message. During the boot procedure, a handshaking protocol is used by the CS493XX. This handshake consists of a 3 byte write to the CS493XX followed by a 1 READ_BYTE_*(HOST CONTROL REGISTER) YES HINSBY==1 NO WRITE_BYTE_*(HOST MESSAGE REGISTER) YES MORE BYTES TO WRITE? NO FINISHED Figure 28. Typical Parallel Host Mode Control Write Sequence Flow Diagram DS339PP4 47 CS49300 Family DSP host can safely read a byte from the Host Message Register (A[1:0] = 00b). 5) If the host expects to read any more response bytes, the host should once again check the HOUTRDY bit (return to step 1). Please refer to one of the application code user's guides to determine the length of messages to read from the CS493XX. Typically this length is 1, 3 or 6 bytes, and can be deduced from the message OPCODE. 6) After the response has been read the host should wait at least 100 uS and check HOUTRDY one final time. If HOUTRDY is high once again this means that an unsolicited message has come during the read process and the host has another message to read (i.e. skip back to step 4 and read out the new message). INTREQ = 0 YES READ_BYTE_*(HOST CONTROL REGISTER) NO HOUTRDY==1 YES READ_BYTE_*(HOST MESSAGE REGISTER) YES MORE BYTES TO READ? NO WAIT 100 uS 7. EXTERNAL MEMORY If using one of the serial modes, i.e. SPI or I2C, the system designer has the option of using external memory. The external memory interface is not compatible with the parallel modes since there are shared pins that are needed by each mode. The external memory interface was designed for autoboot and to extend the data memory range of the DSP during runtime. The application user's guide for a particular code load will inform the system designer if memory is required. If no mention is made of external memory, then external memory is not required for that application. The external memory interface is implemented on the CS493XX with the following signals: EMAD[7:0], EXTMEM, EMOE, and EMWR. Table 8 shows the pin name, pin description and pin number of each signal on the CS493XX. EMAD[7:0] serve as a multiplexed address and data bus. EMOE is an active-low external-memory data output enable as well as the address latch strobe. EMWR is an active low write enable. READ_BYTE_*(HOST CONTROL REGISTER) YES HOUTRDY==1 NO FINISHED Figure 29. Typical Parallel Host Mode Control Read Sequence Flow Diagram 48 DS339PP4 CS49300 Family DSP EXTMEM serves as the active low chip select output. Pin Name /EMOE /EMWR /EXTMEM EMAD7 EMAD6 EMAD5 EMAD4 EMAD3 EMAD2 EMAD1 EMAD0 Pin Description * External Memory Output Enable & Address Latch Strobe * External Memory Write Strobe External Memory Select Address and Data Bit 7 Address and Data Bit 6 Address and Data Bit 5 Address and Data Bit 4 Address and Data Bit 3 Address and Data Bit 2 Address and Data Bit 1 Address and Data Bit 0 Pin Number 5 4 21 8 9 10 11 14 15 16 17 always places the most significant address bits first (see Figures 30, 31, and 32 for details). It should be noted that there are currently no applications for the CS493XX that use more than 32 kilobytes of external memory (RAM or ROM), which corresponds to only 15 address lines. 7.1. Non-Paged Memory Non-paged memories can be used for autobooting a single piece of full download application code such as MP3, HDCD, or SRS Circle Surround. A non-paged memory architecture should be used in systems which will need to access a single dsp application code image (32 Kilobyte maximum), which means that only 15 bits would be required to access the entire application code image. The 16th address bit coming from the DSP should be left unconnected. Figure 35 shows the functional timing of an autoboot sequence in which three address cycles are illustrated. The DSP always considers its address space to range from 0x0000 to 0xFFFF. This means that the decoder is unaware of any data which falls outside of this 64 Kilobyte range. When the DSP is performing an autoboot, the process always begins with address 0x0000. This means that the host microcontroller must be involved in memory accesses which exceed the 32 Kilobyte scope of the CS493XX, and the host must also manage access to all pieces of autoboot code which do not physically reside at location 0x0000. The limitations of a nonpaged memory are easily seen, and they can be circumvented using paged memory designs as discussed in the next section. * - These pins must be configured appropriately to select a serial host communication mode for the CS493XX at the rising edge of RESET Table 8. Memory Interface Pins Figure 30, "External Memory Interface" on page 51 illustrates one possible external memory architecture for the CS493XX. Figure 31, "External Memory Read (16-bit address)" on page 51 shows the functional timing of a 16 bit address memory read and Figure 32, "External Memory Write (16-bit address)" on page 51 shows the functional timing of a 16 bit address memory write. It should be noted that this memory example gives the DSP visibility to up to 64 kilobytes of memory. The external memory address is capable of addressing up to 16 megabytes total through a 24 bit addressing scheme. The address comes from the DSP writing three initial bytes of address consecutively on EMAD[7:0]. Each byte of address is externally latched with the rising edge of EMOE while EXTMEM is high. After the 3-byte address is latched externally, the CS493XX then drives EXTMEM and EMOE low simultaneously to select the external memory. During this time the data is read by the CS493XX. To extend the example shown in Figures 30 to 32 to allow for a 24-bit address, the system designer would add another latch to the system. The DSP DS339PP4 7.2. Paged Memory Sometimes it is desirable for the external memory to be paged by the host controller. One application where this is useful is the autoboot mechanism (discussed in Section 8.2, "Autoboot" on page 56). Using paged memory allows multiple dsp firmware applications to be stored in the same memory, with 49 CS49300 Family DSP one application code image residing in each 32 kilobyte page. Paging of the external memory is handled entirely by the host controller. The host controller should directly control all address bits outside of the memory space to be used by the DSP. As 32 kilobyte pages are desired to hold each application code, the DSP would need 15 bits for the address space. The system designer would connect the 15 address signals from the address latches while the host would directly control all address signals above 15 bits to page the memory accordingly. 50 DS339PP4 CS49300 Family DSP 3.3V 8 EMAD[7:0] 3.3V D CS493XX EMOE EXTMEM EMWR 3.3V 3.3V Q 8 BIT '574 DFF ADDR[7:0] D Q 8 BIT '574 DFF ADDR[14:8] ADDR[7:0] ADDR[14:8] D A T A[7:0] 32K X 8 ROM/RAM OE CS WE (RAM Only) R1 R3 R2 R4 Only one of R1 and R2 shou ld be stuffed. Only one of R3 and R4 shou ld be stuffed. The state of EMOE and EMWR at the rising edge of RESET will determine the serial mode that the part comes up in while using exter nal memory. Please see section 2, Serial Communication for more details. Figure 30. External Memory Interface EXTMEM EMOE EMWR EMAD7:0 MA 23:16 MA15:8 MA7:0 Data7:0 Figure 31. External Memory Read (16-bit address) EXTMEM EMOE EMWR EMAD7:0 MA 23:16 MA15:8 MA7:0 Data7:0 Figure 32. External Memory Write (16-bit address) DS339PP4 51 CS49300 Family DSP 8. BOOT PROCEDURE & RESET pertinent configuration messages. Writing the KICKSTART message to the CS493XX begins the audio decode process. The KICKSTART message will also be described in the user's guide for each application. Until the KICKSTART has been sent, the decoder is in a wait state. MNEMONIC SOFT_RESET RESERVED RESERVED DOWNLOAD_BOOT BOOT_SUCCESS_RECEIVED Table 9. Boot Write Messages MNEMONIC BOOT_START BOOT_SUCCESS APPLICATION_FAILURE BOOT_ERROR INVALID_MSG BOOT_ERROR INIT_FAILURE INIT_FAILURE BAD_CHECKSUM Table 10. Boot Read Messages VALUE 0x01 0x02 0xF0 0xFA 0xFB 0xFC 0xFD 0xFE 0xFF VALUE 0x000001 0x000002 0x000003 0x000004 0x000005 In this section the process of booting and downloading to the CS493XX will be covered as well as how to perform a soft reset. Host boot and autoboot and reset are covered in this section. 8.1. Host Boot A flow diagram of a typical serial download sequence and a typical parallel download sequence will be presented, as well as pseudocode representing a download sequence from the programmers perspective. The pseudocode is written in a general sense where function calls are made to Write_* and Read_*. The * can be replaced by I2C or SPI for the serial download sequence, and INTEL or MOTO for the parallel download sequence, depending on the mode of host communication. For each case the general download algorithm is the same. The download and boot procedure is accomplished with RESET (pin 36), and the communication pins discussed in Section 6, "Control" on page 32. The flow diagrams in Figure 33. Typical Serial Boot and Download Procedure, and Figure 34. Typical Parallel Boot and Download Procedure, illustrate typical boot and download procedures. When reading in serial mode, you must check that INTREQ is low to start reading. Similarly, in parallel mode you must check HOUTRDY. Table 9 defines the boot write messages and Table 10 defines the boot read messages in mnemonic and actual hex value. These messages will be used in the boot sequence. Hardware configuration messages are used to define the behavior of the DSP's audio ports. A more detailed description of the different hardware configurations can be found in the Section 11, "Hardware Configuration" on page 72. The software configuration messages are specific to each application. The application code user's guide for each application provides a list of all 52 8.1.1. Serial Download Sequence The following is a detailed description of a serial download sequence for the CS493XX. Note: When reading from the chip in a serial communication mode, the host must wait for the interrupt request (INTREQ) to fall before starting the read cycle. 1) A download sequence is started when the host issues a hard reset and holds the mode pins appropriately (WR, RD, and PSEL). 2) The host should then send the boot message DOWNLOAD_BOOT (0x000004). This causes the CS493XX to initialize itself for download. 3) If the initialization was successful the DS339PP4 CS49300 Family DSP RESET(LOW) (NOTE 1) RESET(HIGH) (NOTE 2) WAIT 500 s WRITE_*(DOWNLOAD_ BOOT, MSG_SIZE) Notes: 1. RESET must be held LOW for trstl. INTREQ LOW? Y READ_*(MESSAGE) N TIMEOUT AFTER 20MS (NOTE 3) MESSAGE == BOOTSTART? Y WRITE_*(.LD FILE, DOWNLOAD FILE SIZE) N EXIT(ERROR) 2. It should be noted that mode pins are used to configure the CS493XX serial communication mode. These mode pins are latched internally on the rising edge of reset. The pins can be set dynamically by a microprocessor or can be statically pulled HIGH or LOW. If these pins are driven dynamically, setup and hold times must be satisfied as stated in the CS493XX Data Sheet. More information about the function of the mode pins can be found in the CS493XX Data Sheet and in Section 6, "Control" on page 32. 3. Time-out values reflect worst case response time for the CS493XX. The values shown may be used for the host's timeout control loop. 4. 5 ms is typical but this time is application code specific and may be as high as 10 ms. Wait times should be verified by the designer. INTREQ LOW? Y READ_*(MESSAGE) N TIMEOUT AFTER 20MS (NOTE 3) MESSAGE == BOOT_SUCCESS? Y WRITE_*(BOOT_ SUCCESS_RECEIVED, MSG-SIZE) N EXIT(ERROR) 5. Hardware configuration messages are covered in Section 6, "Control" on page 32. Application configuration messages are covered in each application code user's manual. WAIT 5 MS (NOTE 4) DOWNLOAD COMPLETE WRITE_*(HW_CONFIG_MSG, HW_MSG_SIZE) (NOTE 5) WRITE_*(SW_CONFIG_MSG, SW_MSG_SIZE) (NOTE 5) WRITE_*(KICKSTART, MSG_SIZE) (NOTE 5) Figure 33. Typical Serial Boot and Download Procedure DS339PP4 53 CS49300 Family DSP RESET(LOW) (NOTE 1) RESET(HIGH) (NOTE 2) WAIT 500 s WRITE_*(DOWNLOAD_ BOOT, MSG_SIZE) READ HOSTCTL REGISTER N HOUTRDY LOW? Y READ_*(MESSAGE) TIMEOUT AFTER 20MS (NOTE 3) Notes: 1. RESET must be held LOW for trstl. 2. It should be noted that mode pins are used to configure the CS493XX serial communication mode. These mode pins are latched internally on the rising edge of reset. The pins can be set dynamically by a microprocessor or can be statically pulled HIGH or LOW. If these pins are driven dynamically, setup and hold times must be satisfied as stated in the CS493XX Data Sheet. More information about the function of the mode pins can be found in the CS493XX Data Sheet and in Section 6, "Control" on page 32. 3. Time-out values reflect worst case response time for the CS493XX. The values shown may be used for the host's timeout control loop. 4. 5 ms is typical but this time is application code specific and may be as high as 10 ms. Wait times should be verified by the designer. MESSAGE == BOOTSTART? Y WRITE_*(.LD FILE, DOWNLOAD FILE SIZE) N EXIT(ERROR) READ HOSTCTL REGISTER N HOUTRDY LOW? Y READ_*(MESSAGE) TIMEOUT AFTER 20MS (NOTE 3) MESSAGE == BOOT_SUCCESS? Y WRITE_*(BOOT_ SUCCESS_RECEIVED, MSG-SIZE) N EXIT(ERROR) 5. Hardware configuration messages are covered in Section 6, "Control" on page 32. Application configuration messages are covered in each application code user's manual. WAIT 5 MS (NOTE 4) DOWNLOAD COMPLETE WRITE_*(HW_CONFIG_MSG, HW_MSG_SIZE) (NOTE 5) WRITE_*(SW_CONFIG_MSG, SW_MSG_SIZE) (NOTE 5) WRITE_*(KICKSTART, MSG_SIZE) (NOTE 5) Figure 34. Typical Parallel Boot and Download Procedure 54 DS339PP4 CS49300 Family DSP CS493XX sends out the boot message BOOT_START (0x01) and the host should proceed to step 5. 4) If initialization fails, the CS493XX sends out an INIT_FAILURE boot message byte (0xFD or 0xFE), INVALID_MSG byte (0xFB), or BOOT_ERROR byte (0xFA or 0xFC) and spins waiting for a hard reset. The host should re-try steps 1 through 3 and if failure is met again, the serial communication timing and protocol should be inspected. 5) After receiving the BOOT_START byte, the host should write the downloadable image (from the .LD file). 6) The end of the .LD file contains a three byte checksum. If the checksum is good after download, the CS493XX will send a BOOT_SUCCESS message (0x02) to the host. If the checksum was bad, the CS493XX responds with the BAD_CHECKSUM message byte (0xFF) and spins, waiting for hard reset. 7) After reading out the BOOT_SUCCESS byte, the host should send the BOOT_SUCCESS_RECEIVED message (0x000005) which will cause an internal application code reset and allow the downloaded application to run. 8) After waiting 5ms to allow the downloaded application to initialize, the host can send configuration messages for both hardware and software configuration. issues a hard reset and holds the mode pins appropriately (WR, RD, and PSEL). 2) The host should then send the boot message DOWNLOAD_BOOT (0x000004). This causes the CS493XX to initialize itself for download. 3) If the initialization was successful the CS493XX sends out the boot message BOOT_START (0x01) and the host should proceed to step 5. 4) If initialization fails, the CS493XX sends out an INIT_FAILURE boot message byte (0xFD or 0xFE), INVALID_MSG byte (0xFB), or BOOT_ERROR byte (0xFA or 0xFC) and spins waiting for a hard reset. The host should re-try steps 1 through 3 and if failure is met again, the serial communication timing and protocol should be inspected. 5) After receiving the BOOT_START byte, the host should write the downloadable image (from the .LD file). 6) The end of the .LD file contains a three byte checksum. If the checksum is good after download, the CS493XX will send a BOOT_SUCCESS message (0x02) to the host. If the checksum was bad, the CS493XX responds with the BAD_CHECKSUM message byte (0xFF) and spins, waiting for hard reset. 7) After reading out the BOOT_SUCCESS byte, the host should send the BOOT_SUCCESS_RECEIVED message (0x000005) which will cause an internal application code reset and allow the downloaded application to run. 8) After waiting 5ms to allow the downloaded application to initialize, the host can send configuration messages for both hardware and software configuration. 8.1.2. Parallel Download Sequence The following is a detailed description of a parallel download sequence for the CS493XX. Note: When reading from the chip in a parallel communication mode, the host must read the HOSTCTL register and test the HOUTRDY bit before starting the read cycle. 1) A download sequence is started when the host DS339PP4 55 CS49300 Family DSP 8.2. Autoboot Autoboot is a feature available on all DSPs in the CS493XX family which gives the decoder the ability to load application code into itself from an external memory. Because external memory is accessed through the external memory interface, autoboot restricts the host control modes to serial communication (I2C or SPI). For this section the external memory interface shown in Figure 30, "External Memory Interface" on page 51 can be referenced. RESET and ABOOT are the control pins which are used to initiate an autoboot operation by the host controller. It is important to be aware that the ABOOT pin also serves as the INTREQ pin, which means that it will be driven by the CS493XX when not in reset. Due to this constraint, ABOOT should be connected to an open-drain output of the microcontroller so as to allow the specified pull-up resistor to generate a logic high level. At the completion of a successful download, INTREQ (ABOOT) becomes an output and the host should no longer drive it. The timing for an autoboot sequence is illustrated in Figure 35. The sequence is initiated by driving RESET low and placing the decoder into reset. At the rising edge of RESET, the ABOOT, WR, and RD pins are sampled. If ABOOT is low when sampled, and the WR and RD pins are set to configure the device for serial communications, the device will begin to autoboot (PSEL is a don't care for serial communications modes). Section 6.1, RE S E T ABOOT EXT M E M EMOE EMW R E M A D7:0 M A 23:16 M A 15:8 M A 7:0 Data7:0 "Serial Communication" on page 33 discusses the procedure required for placing the CS493XX into a serial communication mode in more detail. For a more thorough description of ABOOT's behavior after the rising edge of RESET please refer to Section 8.2.1, "Autoboot INTREQ Behavior" on page 57 The EMOE pin of the CS493XX is used for two purposes. It generates clock pulses for the latches, and it is used in conjunction with EXTMEM to enable the outputs of the ROM. The first three rising edges of EMOE are used to latch address bytes, as shown in the diagram. The fourth low pulse of EMOE is used to enable the ROM outputs. When both EXTMEM and EMOE go low, the EMAD[7:0] pins of the DSP become inputs and await the data coming from the ROM. When comparing the memory system in Figure 30, "External Memory Interface" on page 51 to the timing diagram of Figure 35, "Autoboot Timing Diagram" on page 56 there may appear to be a discrepancy. The timing diagram shows three address cycles, but there are only two latches in the illustration of the memory architecture. This difference is a result of code size limitations. The application code is guaranteed to fit into a 32 Kilobyte space, which means that only 15 address bits will actually be used for retrieving code from the ROM. Thus, the two latches catch the least significant bytes, and the most significant byte is dropped. Figure 35. Autoboot Timing Diagram 56 DS339PP4 CS49300 Family DSP In autoboot mode, latching the most significant byte would be perfectly valid since the most significant bits are guaranteed to be zeros (the three bytes represent a true 24-bit address). The flow chart given in Figure 36, "Autoboot Sequence" on page 58 demonstrates the interaction required by the microcontroller when placing the DSP into autoboot mode. The host must first drive the RESET line low. After waiting for 175 ms, the application code should be fully downloaded to the DSP, however the designer should note that this time is typical and may vary for each application code. During the wait period, the host should ignore all INTREQ behavior (mask the INTREQ interrupt). The host can then verify that the code has successfully initialized itself by sending a solicited read command to the DSP to check for a known default value. For example, by sending Rd_Audio_Mgr_Request (0x090003) the host will receive Rd_Audio_Mgr_Response (0x890003, 0x000000). If the first read attempt returns an incorrect value, a 5ms wait should be inserted and the read should be repeated. If a second invalid response is read, the entire boot process should then be repeated. When the number returned matches the default value for the variable read, the host can be confident that the application is resident in the DSP and awaiting further instructions. An application code user's guide should be consulted for information about reading a variable from the part. Hardware configuration messages are used to define the behavior of the DSP's audio ports. A more detailed description of the different hardware configurations can be found in Section 11, "Hardware Configuration" on page 72. The software configuration messages are specific to each application. The software user's guides (AN163, AN163x, AN162, AN162x) for each application code provides a list of all pertinent configuration messages. Writing the KICKSTART message to the CS493XX begins the audio decode process. The KICKSTART message will also be described in the user's guide for each application. Until the KICKSTART has been sent, the decoder is in a wait state. 8.2.1. Autoboot INTREQ Behavior It is important to note that ABOOT and INTREQ are multiplexed on pin 20 of the CS493XX. Because this pin serves as an input before reset, and an output after reset, the host should release the ABOOT line after RESET has gone high. As shown in Figure 37, "Autoboot INTREQ Behavior" on page 57, the host must drive ABOOT low around the rising edge of RESET. After the host has released the ABOOT line, it will remain high while the DSP prepares to load code from the external memory. INTREQ should be ignored during download, i.e. interrupts should be masked on the host. The download time will vary according to the size of the download image and the frequency of the main DSP clock. The autoboot sequence is specified to complete within 200 ms Trstsu Driven Low by Host Driven Low by CS492X RESET ABOOT Trsthld Download in Progress Figure 37. Autoboot INTREQ Behavior DS339PP4 57 CS49300 Family DSP RESET(LOW) (NOTE 1) ABOOT(LOW) RESET(HIGH) (NOTE 2) RELEASE ABOOT WAIT 200 MS (NOTE 3) READ_*(VARIABLE) (NOTE 4) CORRECT VALUE? Y N WAIT 5 MS AUTOBOOT COMPLETE WRITE_*(HW_CONFIG_MSG, HW_MSG_SIZE) (NOTE 4) Notes: 1. RESET must be held LOWTrstl. 2. The RD and WR pins must be configured to select a serial communication mode as defined in the CS493XX Datasheet. The setup (Trstsu) and hold (Trsthld) times must be observed for the RD, WR, and AUTOBOOT pins. 3. INTREQ should be ignored during this period. 200 ms is typical but this time is application code specific and may be higher. Wait times should be verified by the designer. 4. The READ_* and WRITE_* functions are placeholders for the READ_I2C/READ_SPI and WRITE_I2C/WRITE_SPI functions defined in Section 6.1, "Serial Communication" on page 33. WRITE_*(SW_CONFIG_MSG, SW_MSG_SIZE) (NOTE 4) WRITE_*(KICKSTART, MSG_SIZE) (NOTE 4) Figure 36. Autoboot Sequence 58 DS339PP4 CS49300 Family DSP (from the rising edge of RESET). Note: This time has been tested using the ac3_493263_13.ld application code release, however other application code releases MAY take longer than 200mS as they have may an increased image size and may take longer to initialize all of the internal state variables. It is up to the designer to verify the actual times required for each application code in their system. host had toggled the RESET line with ABOOT held low, only now, the code image held in the external flash or eprom page will now be downloaded anywhere from 1.5 to 3 times faster than using Autoboot, depending on the gfabt code that was first downloaded. The normal DSP clock divide factor during Autoboot is 12 (VCO open loop frequency divider). The gfabt8.ld code changes that divide factor to 8, the gfabt6.ld code changes it to 6, and the gfabt4.ld code changes it to 4. Contact your FAE in order to obtain these gfabt codes. Some sample data for various autoboot times can be seen below in Table 11 using the ac3_pl2_reeq_493264_08.ld application code. It shows that the autoboot times after downloading gfabt8.ld, gfabt6.ld, and gfabt4.ld are approximately 1.5, 2, and 3 times faster than a standard autoboot. The typical autoboot time listed in the datasheet of 200 ms will therefore become 135 ms (200ms/1.5), 100ms (200ms/2), and 70ms (200/3) with gfabt8, 6, and 4, respectively. 8.3. Decreasing Autoboot Times Using GFABT Codes (Fast Autoboot) Instead the host toggling the RESET line while ABOOT is held low, the host decrease the Autoboot download time by instead downloading a special code called "GFABT" (Genesis Fast Autoboot) which first speeds up the DSP's core clock, and then automatically causes the DSP to Autoboot itself from external ROM. Basically, the host should perform a normal serial host boot with one of the GFABT codes (gfabt8.ld, gfabt6.ld or gfabt4.ld) as described in Section 8.1.1, (with ABOOT held high). Immediately following the download of the GFABT code, the DSP will start to act the exact same way as if the Open Loop VCO Application Code Name (8.3 File Name) Application Code Name (Long File Name) Code Size on Disk Code Size in Bytes Sample 1 Sample 2 Sample 3 12.5 MHz 12.4 MHz 11.7 MHz Standard Autoboot Times ac3_pl~1.ld dts_6d~1.ld eff_49~1.ld GFABT4.LD ac3_pl~1.ld GFABT6.LD ac3_pl~1.ld GFABT8.LD ac3_pl~1.ld ac3_pl2_ reeq_ 493264_ 08.ld 94 k 24 k 98 ms 99 ms 97 ms dts_6dot1_ reeq_ 493264_ 04.ld 94 k 24 k 96 ms 98 ms 96 ms eff_4932xx _14.ld 47 k 12 k 48 ms 50 ms 48 ms 34 ms 34 ms 32 ms 50 ms 50 ms 50 ms 65 ms 67 ms 66 ms Table 11. Reduced Autoboot Times using GFABT8.LD, GFABT6.LD, and GFABT4.LD on a CS493264-CL Rev. G DSP DS339PP4 59 CS49300 Family DSP RESET(LOW) (NOTE 1) WRITE_*(DOWNLOAD_ BOOT, MSG_SIZE) RESET(HIGH) (NOTE 2) WAIT 500 s TIMEOUT AFTER 20MS (NOTE 3) N INTREQ LOW? Y READ_*(MESSAGE) WRITE_*(GFABTX.LD FILE, DOWNLOAD FILE SIZE) MESSAGE == BOOTSTART? N EXIT(ERROR) Y WAIT 135 MS, 100 MS, OR 70 MS (NOTE 5) Notes: 1. RESET must be held LOWTrstl. 2. It should be noted that mode pins are used to configure the CS493XX serial communication mode. These mode pins are latched internally on the rising edge of reset. The pins can be set dynamically by a microprocessor or can be statically pulled HIGH or LOW. If these pins are driven dynamically, setup and hold times must be satisfied as stated in the CS493XX Data Sheet. More information about the function of the mode pins can be found in the CS493XX Data Sheet and in Section 6, "Control" on page 32. 3. Time-out values reflect worst case response time for the CS493XX. The values shown may be used for the host's time-out control loop. 4. Hardware configuration messages are covered in Section 6, "Control" on page 32. Application configuration messages are covered in each application code user's manual. 5. INTREQ should be ignored during this period. Depending on which GFABT code is used, wait times can vary from 135 ms to 70 ms. All actual Autoboot times should be verified by the designer. 6. The READ_* and WRITE_* functions are placeholders for the READ_I2C/READ_SPI and WRITE_I2C/WRITE_SPI functions defined in Section 6.1, "Serial Communication" on page 33. READ_*(VARIABLE) (NOTE 4) CORRECT VALUE? Y N WAIT 5 MS AUTOBOOT COMPLETE WRITE_*(HW_CONFIG_MSG, HW_MSG_SIZE) (NOTE 6) WRITE_*(SW_CONFIG_MSG, SW_MSG_SIZE) (NOTE 6) WRITE_*(KICKSTART, MSG_SIZE) (NOTE 6) Figure 38. Fast Autoboot Sequence Using GFABT Codes 60 DS339PP4 CS49300 Family DSP 8.3.1. Design Considerations when using GFABT Codes The designer should be aware that the gfabt codes do not lock the PLL, so therefore the actual time involved with autobooting is subject to the open loop VCO frequency. The PLL is only locked when the command is sent from the host, typically along with the kickstart command. Also, the designer should take into account the access time of the Flash Memory, EPROM, and latches used in their specific design. While there is a temptation to use the gfabt4 code which would theoretically minimize the Autoboot time, the designer should realize that this may result in the DSP to attempting to Autoboot too quickly, resulting in clocking times that exceed that of the specified access times of particular external memory devices or the associated latches. The designer should note that the times listed in Table 11 were taken from 3 sample CS493264-CL Rev. G devices and are in no way a guarantee of the times that your design will achieve as all values are dependent on the open loop frequency of the DSP. Furthermore the times listed in Table 11 DO NOT include the code initialization time (the time spent after download while the code prepares for messages). Therefore, the times listed above should be used as the upper bound on boot time when using the gfabt codes. 8.5. Application Failure Boot Message Each piece of application code is specifically tailored for an individual part in the CS493XX family. Although it is possible to load a piece of code into the wrong chip and receive a BOOT_SUCCESS byte, the code will not initialize itself. In order to facilitate the debug of designs which can accept many members of the CS493XX family, an APPLICATION_FAILURE message is provided. As mentioned earlier, the host must wait for at least 5ms after download before sending configuration messages to the CS493XX. This provides time for the code to initialize itself. If the INTREQ pin is low after the download process has completed, the host should read from the CS493XX. The byte 0xF0 indicates APPLICATION_FAILURE. This byte informs the host that the application code was loaded into an incompatible DSP. Although most of the messages listed in Tables 9 and 10 are essentially ignored for autoboot, it should be noted that the APPLICATION_FAILURE message is applicable whether host boot or autoboot is used. 8.6. Resetting the CS493XX Resetting the CS493XX uses a combination of software and hardware. To reset the device, a previous application must have been downloaded. The flow diagram in Figure 39, "Performing a Reset" on page 62 shows the procedure for performing a reset. The following is a detailed description of a reset sequence to the CS493XX. All writes and reads with the CS493XX should follow the protocol given in Section 6, "Control" on page 32. 1) Reset begins when the host issues a hard reset and holds the mode pins appropriately (WR, RD, and PSEL) as described in Section 6, "Control" on page 32. It is assumed that the communication protocol is followed for 61 8.4. Internal Boot Certain applications are stored in the ROM of the CS493253, CS493254, CS493263 and CS493264. To enable these applications a special loader called an internal boot assist program must be used. This internal boot assist (or IBA) code can be downloaded using either host boot or autoboot methods. After the IBA program has been downloaded, it enables the internally stored application code. The IBA codes are typically around 350 bytes in size and hence can easily be stored in a host controller. DS339PP4 CS49300 Family DSP whichever communication mode is chosen by the host. 2) The host should then send the message SOFT_RESET (0x000001). This will reset the previously downloaded application with all of the hardware configurations in their default states. The application code user's guide for each application lists those parameters which are affected by a SOFT_RESET. 3) After waiting 5 ms to allow the downloaded application to initialize, the host can send configuration messages for both hardware and software configuration. This method of resetting the DSP is usually referred to as a "soft reset" even though it involves toggling the reset pin. Table 12 lists some possible external memory configurations for each DSP, in conjunction with IBA codes stored in the host microcontroller. The table provides a list of the ROM content, the size of the combined memory images, the recommended RESET(LOW) (NOTE 1) page size, and the number of discrete pages required. The examples also include several figures which present the different ROM configurations as composite memory images. The CS49292, CS493102, and CS493112 all have special memory requirements since they must have access to external SRAM (70nS or faster) during the decoding of AAC Multichannel (5.1 Channel) audio. More specifically this SRAM requirement is ONLY required for AAC application code which is capable of outputting 5.1 discrete channels, but is not required of application code that offers a 2 channel downmixed output. Also, for the CS49330, there are certain releases THX Surround EX (5.1 Channel and 7.1 Channel versions), and THX Ultra2 Cinema (7.1 Channel version only) application codes that offer additional all-channel delay, and for this a 1Mbit or 2Mbit, 70nS SRAM is also required. The THX Surround EX application codes (5.1 Channel or 7.1 Channel) nor the THX Ultra2 Cinema code do not Notes: 1. RESET must be held LOW for trstl. 2. It should be noted that mode pins are used to configure the CS493XX communication mode. These mode pins are latched internally on the rising edge of reset and can be set dynamically by a microprocessor or can be statically pulled HIGH or LOW. If these pins are driven dynamically, setup and hold times must be satisfied as stated in the CS493XX Datasheet. More information about the function of the mode pins can be found in the CS493XX Datasheet and in Section 6, "Control" on page 32. 3. 5 ms is typical but this time is application code specific and may be as high as 10 ms. Wait times should be verified by the designer. 4. Configuration messages determine both hardware and software configuration. Hardware configurations are described in Section 11 of this manual. Software application configuration messages are described in the Application Code User's Guide for the code being used. Figure 39. Performing a Reset RESET(HIGH) (NOTE 2) WAIT 500 s WRITE_* (SOFTRESET, MSG_SIZE) WAIT 5 ms (NOTE 3) WRITE_* (CONFIGURATION_MESSAGES, CONFIG_MSG_SIZE) (NOTE 4) 62 DS339PP4 CS49300 Family DSP ROM Content CS493254 N/A, All IBA codes are loaded using Host Boot technique Dolby Digital with PLII + Cinema Re-EQ, HDCD Image Size Number of Pages Required IBA Code(s) Stored in Host Type of Design N/A, All IBA codes N/A, All IBA codes Dolby Digital with Dolby Digital with are loaded using are loaded using PL II, Pro Logic II 5.1 Host Boot technique Host Boot technique C.O.S. Channel System 32 + 32 = 64 Kbytes 2 C.O.S. Enhanced Dolby Digital with Pro Logic II 5.1 Channel System N/A, All IBA codes N/A, All IBA codes Dolby Digital with Enhanced are loaded using are loaded using PL II, Dolby Digital/ Host Boot technique Host Boot technique C.O.S., DTS DTS 5.1 Channel System Dolby Digital with C.E.S., MPEG 32 * 4 pages = 4 C.O.S. Basic 6.1 Multichannel with C.E.S., DTS 128 Kbytes Channel System with C.E.S., MP3 Dolby Digital with PLII with 32 * 4 pages = 4 C.O.S. Enhanced 6.1 C.E.S., MPEG Multichannel with 128 Kbytes Channel System PLII, DTS-ES, DTS Neo:6 32 * 8 = 8 C.O.S. Premium Dolby Digital with PLII with 256 Kbytes 6.1/7.1 Channel C.E.S., MPEG Multichannel with System PLII, DTS-ES with PLII, DTS Neo:6, HDCD, LOGIC7, MP3, Virtual Dolby Digital with VMAx VirtualTheater CS493292 Premium 6.1/7.1 32 * 8 = 8 N/A, No IBA Dolby Digital with PLII with 256 Kbytes Codes not avail- Channel System C.E.S., MPEG Multichannel with with AAC able for the PLII, DTS-ES, DTS Neo:6, Support CS493292 HDCD, SRS Circle Surround II, C.O.S., MPEG-2: AAC Table 12. Memory Requirements for Example 5.1, 6.1 and 7.1 Channel Systems CS493264 N/A, All IBA codes are loaded using Host Boot technique require external SRAM. Please refer to the CS4932X/CS49330 Part Matrix vs. Code Matrix for more detail about each particular application code. The speed of external ROM or Flash Memory need only be 330nS (or faster) which stores the application codes, while the speed of the SRAM must be 70nS or faster. 8.7. External Memory Examples 8.7.1. Non-Paged Autoboot Memory The most rudimentary memory design discussed above is the non-paged memory. In a non-paged design, the DSP can only access one item in memory which could be either a single full download code load. The memory image given in Figure 40 is an example of a non-paged memory image. Only 15 of the 16 output bits of the address latches would be connected to address bits A0-A14 of the DS339PP4 63 CS49300 Family DSP 0x00000 D olby D igital with Pro Logic II C ode or another Full D ownload C ode 0x00000 0x0FF FF 0x07FFF 0x08000 D olb y D igital with Pro Logic II with C irrus Ex tra S urround Figure 40. Non-Paged Memory M PE G M ultichannel with Pro Logic II 0x0FFFF 0x10000 D T S-ES Exte nded Surrou nd external ROM, in order to have access to the single application code stored in the 32 kilobyte nonpaged memory. The host is completely isolated from memory accesses in this situation. Once the hardware has been designed, the DSP itself will be responsible for all communication with the ROM. 0x17FFF 0x18000 D T S-ES N eo:6 0x1FFFF 0x20000 HDCD 8.7.2. 32 Kilobyte Paged Autoboot Memory An external memory architecture which is paged on 32 Kilobyte boundaries offers the higher end system the ability to store several full download or IBA application codes in each 32 Kilobyte page. Figure 41 shows an example of a 32 Kilobyte paged memory image for a the premium 6.1/7.1 channel system describe in Table 12 above. The flow diagram given in Figure 36 demonstrates the interaction required by the microcontroller during autoboot. After placing the decoder into a reset state, the host selects the page in memory containing first code by driving uC15 to a low state. The host also drives ABOOT low and holds it in a low state until the rising edge of RESET to initiate autoboot. As noted in the autoboot section, the ABOOT pin should be connected to an open-drain output of the microcontroller so as to allow the specified pull-up resistor to generate the high value. The open-drain driver is required because the DSP will begin using the pin as an output after a successful download (INTREQ and ABOOT are multiplexed on the same pin). After waiting for 175 ms, the download should have completed. During the wait period, the host should ignore all INTREQ behavior (mask the INTREQ interrupt). The host can then verify that the code has successfully initialized itself by reading a variable from the application and 64 0x27FFF 0x28000 LO G IC 7 0x2FFFF 0x30000 M P3 0x37FFF 0x38000 Virtu al D olby D ig ital with VM A x V irtualT heater 0x3FFFF Add ress line uC 15, uC 16, a nd uC 17 us ed fo r paging Figure 41. Example Contents of a Paged 32 Kilobytes External Memory (Total 256 Kilobytes) checking the returned value against the default value. Any variable can be used for the verification step, but a robust design will select a variable whose value is neither all 0's nor all 1's. If the first read attempt returns an incorrect value, a 5 ms wait should be inserted and the read should be repeated. If a second invalid number is read, the entire boot process should be repeated. When the number returned matches the default value for the variable read, the host knows that the application is resident in the DSP and awaiting further instruction. Please see Section 8.2, "Autoboot" on page 56 for more information. For systems that would prefer to store all application codes in an external parallel Flash Memory (vs. a OTP EPROM) in order to realize a "field-upgradable" system, please contact dsp_support@crystal.cirrus.com for information DS339PP4 CS49300 Family DSP about how to control the GPIO pins of the DSP via messaging to the SPI or I2C port. to external SRAM, such as decoding of AAC Multichannel streams, which have a 5.1 channel output. These applications require that the DSP has real-time access to 70nS (or faster) 32 Kilobyte SRAM. The 128 Kilobyte SRAM on the CDB49300-MEMA.0 is made accessible by the DSP when the host drives uC18 high. The external 256 Kilobyte EPROM is accessible to the DSP when the host controller drives uC18 low. The with uC15, uC16, and uC17 lines are used to page between the various code images. 8.8. CDB49300-MEMA.0 The CDB49300-MEMA.0 is an external memory adapter card designed for use with the CDB4923/CDB4930 REV-A.0 Evaluation Board. The schematic for the CDB49300-MEMA.0 is shown in Figure 42. This board is an example of one possible external memory configuration. In addition to autobooting from external EPROM, certain application codes require real-time access DS339PP4 65 +3.3V C6 2 3 + U6A 1 uC15 R8 49.9 EMAD7 EMAD5 EMAD3 EMAD1 R5 49.9 R6 49.9 U6D 12 13 EMAD2 R15 R17 R18 49.9 74VHC245 49.9 VCC GND 1G DIR 49.9 20 10 19 1 #EXTMEM #EMWR C8 0.1uF 14 +3.3V C9 0.1uF R19 0 CS49300 Family DSP Figure 42. CDB49300-MEMA.0 Daughter Card for the CDB4923/30-REV-A.0 7 66 U1 U3 A16 D[7:0] EMAD[7:0] U2 U4 uC17 uC16 uC15 O0 O1 O2 O3 O4 O5 O6 O7 CE OE PGM VPP VCC GND 1 32 16 22 24 31 EMAD0 EMAD1 EMAD2 EMAD3 EMAD4 EMAD5 EMAD6 EMAD7 19 18 17 16 15 14 13 12 D0 D1 D2 D3 D4 D5 D6 D7 CK VCC OE GND 1 20 10 VCC OE GND Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7 D0 D1 D2 D3 D4 D5 D6 D7 CK 20 10 Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7 2 3 4 5 6 7 8 9 D0 D1 D2 D3 D4 D5 D6 D7 Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7 A0 A1 A2 A3 A4 A5 A6 A7 A0 A1 A2 A3 A4 A5 A6 A7 2 3 4 5 6 7 8 9 11 1 11 19 18 17 16 15 14 13 12 2 3 4 5 6 7 8 9 19 18 17 16 15 14 13 12 A8 A9 A10 A11 A12 A13 A14 A15 A8 A9 A10 A11 A12 A13 A14 A15 13 14 15 17 18 19 20 21 D0 D1 D2 D3 D4 D5 D6 D7 #EMOE 20 10 11 +3.3V #EMOE +3.3V C2 0.1uF 0.1uF 74LVC574 uC18 #EXTMEM #EMWR R1 10K +3.3V CK #EMOE +3.3V C3 1 VCC OE GND C1 0.1uF 74LVC574 74LVC574 A14 A13 A12 A11 A10 A9 A8 A7 A6 A5 A4 A3 A2 A1 A0 AT27LV020A 30 2 3 29 28 4 25 23 26 27 5 6 7 8 9 10 11 12 A17 A16 A15 A14 A13 A12 A11 A10 A09 A08 A7 A6 A5 A4 A3 A2 A1 A0 C4 0.1uF A[16:0] +3.3V uC18 C5 0.1uF +3.3V 47uF 74LVC125 #ABOOT U5 CE2 OE CE1 WE R2 10K 6 32 30 5 C7 P1 R4 49.9 0.1uF #EXTMEM #uC18 #EMWR uC17 uC16 #EMWR 11 R3 49.9 #RESET uC18 #ABOOT +3.3V #EXTMEM R7 49.9 #EMOE R9 49.9 EMAD6 EMAD4 EMAD2 EMAD0 1 3 5 7 9 11 13 15 17 19 2 4 6 8 10 12 14 16 18 20 #uC18 74LVC125 R16 10K EMAD[7:0] R10 49.9 49.9 49.9 49.9 49.9 EMAD[7:0] U7 A16 A15 A14 A13 A12 A11 A10 A9 A8 A7 A6 A5 A4 A3 A2 A1 A0 8 10 7 11 4 12 1 31 2 3 13 14 15 16 17 18 19 20 D7 D6 D5 D4 D3 D2 D1 D0 NC GND 29 28 27 26 25 23 22 21 9 24 VCC A16 A15 A14 A13 A12 A11 A10 A9 A8 A7 A6 A5 A4 A3 A2 A1 A0 D0 D1 D2 D3 D4 D5 D6 D7 D[7:0] D[7:0] CY7C109V33 EMAD7 EMAD6 R11 R12 R13 R14 +3.3V EMAD5 EMAD4 EMAD3 18 17 16 15 14 13 12 11 Y1 Y2 Y3 Y4 Y5 Y6 Y7 Y8 A1 A2 A3 A4 A5 A6 A7 A8 2 3 4 5 6 7 8 9 D7 D6 D5 D4 D3 D2 D1 D0 EMAD1 U6E 74LVC125 EMAD0 DS339PP4 CS49300 Family DSP 9. HARDWARE CONFIGURATION After download or soft reset, and before kickstarting the application (please see the Audio Manager in the Application Messaging Section of any Application Code User's Guide for more information on kickstarting), the host has the option of changing the default hardware configuration. Hardware configuration messages are used to physically reconfigure the hardware of the audio decoder, as in enabling or disabling address checking for the serial communication port. Hardware configuration messages are also used to initialize the data type (i.e., PCM or compressed) and format (e.g., I2S, left justified, etc.) for digital data inputs, as well as the data format and clocking options for the digital output port. In general, the hardware configuration can only be changed immediately after download or after soft reset. However, some applications provide the capability to change the input ports without affecting other hardware configurations after sending a special Application Restart message (please see the Audio Manager in any Application Code User's Guide to determine whether the Application Restart message is supported). Section 11.4 at the end of this chapter will describe how to construct a hardware configuration message. particular mode is desired that is not presented, please contact your sales representative as to its availability. 10.1. Digital Audio Formats This subsection will describe some common audio formats that the CS493XX supports. It should be noted that the input ports use up to 24-bit PCM resolution and 16-bit compressed data word lengths. The output port of the CS493XX provides up to 24-bit PCM resolution. 10.1.1.I2S Figure 43, "I2S Format" on page 68 shows the I2S format. For I2S, data is presented most significant bit first, one SCLK delay after the transition of LRCLK and is valid on the rising edge of SCLK. For the I2S format, the left subframe is presented when LRCLK is low and the right subframe is presented when LRCLK is high. SCLK is required to run at a frequency of 48Fs or greater on the input ports. 10.1.2.Left Justified Figure 44 shows the left justified format with a rising edge SCCLK. Data is presented most significant bit first on the first SCLK after an LRCLK transition and is valid on the rising edge of SCLK. For the left justified format, the left subframe is presented when LRCLK is high and the right subframe is presented when LRCLK is low. The left justified format can also be programmed for data to be valid on the falling edge of SCLK. SCLK is required to run at a frequency of 48Fs or greater on the input ports. 10. DIGITAL INPUT & OUTPUT The CS493XX supports a wide variety of data input and output mechanisms through various input and output ports. Hardware availability is entirely dependent on whether the software application code being used supports the required mode. This data sheet presents most of the modes available with the CS493XX hardware. This does not mean that all of the modes are available with any particular piece of application code. The application code user's guide for the particular code being used should be referenced to determine if a particular mode is supported. In addition if a DS339PP4 10.1.3.Multichannel Figure 45 shows the multichannel format. In this format up to 6 channels of audio are presented on one data line with M bits per channel. Channels 0, 2, and 4 are presented while the LRCLK is high and channels 1, 3, 5 are presented while the LRCLK is low. Data is valid on the rising edge of SCLK and 67 CS49300 Family DSP is presented most significant bit first. It should be noted that in the multichannel modes the SCLK rate must be greater than the number of bits per channel multiplied by the number of channels. In the example SCLK must be greater than M * 6. Because each of the ports is fully configurable (SCLK polarity, LRCLK polarity, Word Width, SCLK Rate) not all modes have been presented. names, mnemonics and pin numbers associated with the DAI. Pin Name SDATAN1 STCCLK2 SCLKN1 LRCLKN1 Pin Description Serial Data In Secondary STC clock Serial Bit Clock Frame Clock Pin Number 22 25 26 Table 13. Digital Audio Input Port 10.2. Digital Audio Input Port The digital audio input port, or DAI, is used for both compressed and PCM digital audio data input. In addition this port supports a special clocking mode in which a clock can be input to directly drive the internal 33 bit counter. Table 13, "Digital Audio Input Port," on page 68 shows the pin The DAI is fully configurable including support for I2S, left justified and multichannel formats. In addition the DAI can be programmed for slave clocks, where LRCLKN1 and SCLKN1 are inputs, or master clocks, where LRCLKN1 and SCLKN1 are outputs. In order for clocks to be master, the internal PLL must be used. STCCLK2 can also be programmed to drive the internal 33 bit counter. This counter would typically be driven by a 90kHz clock. The internal LR C K SCLK SDATA MSB Le ft R ig ht LSB M SB LS B Figure 43. I2S Format LRCK SC LK SDATA M SB Le ft R ig ht LS B MSB LS B MSB Figure 44. Left Justified Format (Rising Edge Valid SCLK) LR C LK S C LK SDATA MSB LSB M SB LS B MSB LS B MSB LS B MSB LS B MSB L SB MSB M C locks P er C hannel M Clocks P er Channel M C lock s P er C h annel M C locks P er C hann el M C lock s P er C hannel M Clocks P er Ch annel Figure 45. Multichannel Format 68 DS339PP4 CS49300 Family DSP counter is used by certain application code for audio/video synchronization purposes. 10.4. Byte Wide Digital Audio Data Input Two types of byte wide parallel delivery are supported by the CS493XX. If using one of the parallel control modes described in Section 6.2, "Parallel Host Communication" on page 41, then the parallel interface can also be used for delivering data. If using I2C or SPI control, then parallel delivery can still be used using CMPCLK and GPIO[7:0]. 10.3. Compressed Data Input Port The compressed data input port, or CDI, can be used for both compressed and PCM data input. Table 14 shows the mnemonic, pin name and pin number of the pins associated with the CDI port on the CS493XX. Pin Name SDATAN2 CMPDATA SCLKN2 CMPCLK LRCLKN2 CMPREQ Pin Description Serial Data In Compressed Data In Serial Bit Clock Frame Clock Data Request Out Pin Number 27 28 29 10.4.1.Parallel Delivery with Parallel Control If using the Intel or Motorola Parallel host interface mode, the system designer can also choose to deliver data through the byte wide parallel port. The delivery mechanism is identical to that discussed in Section 6.2, "Parallel Host Communication" on page 41. The compressed data input register (CMPDAT) receives bytes of data when the host interface writes to address 11b (A1 and A0 are both high). The host should check level of the Compressed Data FIFO before sending data. The CS493XX has two means of indicating the Compressed Data FIFO level. The MFB bit in the Host Control Register is one indicator of the Compressed Data FIFO level. The MFB bit remains low until the FIFO threshold has been reached. The alternative is to use the CMPREQ pin of the CS493XX. The CMPREQ pin also remains low until the FIFO threshold has been reached. The host has the option of using either CMPREQ or the MFB bit. Data should be delivered to the CS493XX in blocks of data. Before each block is delivered, the host should check the MFB bit (or the CMPREQ pin). If the MFB bit (CMPREQ) is low, then the host can deliver a block of data one byte at a time. If the MFB bit (CMPREQ) is high, no more data should be sent to the CS493XX. Once the MFB bit (CMPREQ) has gone low again, the host may send another block of compressed audio data. Table 14. Compressed Data Input Port The CDI is fully configurable including support for I2S, left justified and multichannel formats. The CDI can also be programmed for slave clocks, where LRCLKN2 and SCLKN2 are inputs, or master clocks, where LRCLKN2 and SCLKN2 are outputs. In order for clocks to be mastered, the internal PLL must be used. In addition the CDI can be configured for bursty compressed data input. Bursty audio delivery is a special format in which only clock (CMPCLK) and data (CMPDAT) are used to deliver compressed data to the CS493XX (i.e. no frame clock or LRCLK). A third line, CMPREQ, is used to request more data from the host. It is an indicator that the CS493XX internal FIFO is low on data and can accept another burst. Typically this mode is used for compressed data delivery where asynchronous data transfer occurs in the system, i.e. in a system such as a set-top box or HDTV. PCM data can not be presented in this mode since data is interpreted as a continuous stream with no word boundaries. DS339PP4 69 CS49300 Family DSP During delivery of a block of data the FIFO threshold should not be checked. In other words the FIFO indicators are level sensitive and indicate that a block can be delivered when they are low. They may return high during the data delivery. When this happens there is still room for the remaining bytes of the block. The PCM data input register (PCMDAT) receives bytes of data when the host interface writes to address 10b (A1 high, A0 low). The MFC bit in the Host Control Register is an indicator of the PCM FIFO level. The MFC bit remains low until the FIFO threshold has been reached. The PCMRST bit of the CONTROL register provides absolute software/hardware synchronization by initializing the input channel to uniquely recognize the first write to the byte-wide PCMDATA port. Toggling PCMRST high and low informs the DSP that the next sample read from the PCMDATA port is the first sample of the left channel. In this fashion, the CS493XX can translate successive byte writes into a variable number of channels with a variable PCM sample size. In the most simple case, the CS493XX can receive stereo 8-bit PCM one byte at a time with the internal DSP assigning the first 8-bit write (after PCMRST) to the left channel and the second 8-bit write to the right channel. For 24-bit PCM, it assigns the first three 8-bit writes (after PCMRST) to the left channel and the next three writes to the right channel. Before starting PCM transfer, or to initiate a new PCM transfer, the PCMRST bit must be toggled as described above to insure data integrity. Data must be delivered to the CS493XX in blocks of data. The block size is set through a hardware configuration message. Before each block is delivered, the host should check the MFC bit. If the MFC bit is low, then the host can deliver a block of data one byte at a time. If the MFC bit is high, no more data should be sent to the CS493XX. Once the MFC bit has gone low again, the host may send another block of PCM audio data. The MFC bit is FIFO level sensitive. In other words, it may change during the transfer of a block. The host should complete the block transfer and ignore the MFC bit until the block transfer is complete. 10.4.2.Parallel Delivery with Serial Control When using I2C or SPI control, bytewide delivery of data can still be achieved using SCLKN2(CMPCLK) and GPIO[8:0]. In this mode the bytewide parallel data is clocked into the part on the transition of CMPCLK. In this mode CMPREQ can be used as the FIFO threshold indicator. When CMPREQ is low it means that the CS493XX can receive another block of data. 10.5. Digital Audio Output Port The Digital Audio Output port, or DAO, is the port used for digital output from the DSP. Table 15 shows the signals associated with the DAO. As with the input ports the clocks and data are fully configurable via hardware configuration. Pin Name AUDATA3, XMT958 AUDATA2 AUDATA1 AUDATA0 LRCLK SCLK MCLK Pin Description Serial Data Out IEC60958 Transmitter Serial Data Out Serial Data Out Serial Data Out Frame Clock Serial Bit Clock Master Clock Table 15. Digital Audio Output Port Pin Number 3 39 40 41 42 43 44 MCLK is the master clock and is firmware configurable to be either an input or an output. If MCLK is to be used as an output, the internal PLL must be used. As an output MCLK can be 70 DS339PP4 CS49300 Family DSP configured to provide a 128Fs, 256Fs or 512Fs clock, where Fs is the output sample rate. SCLK is the bit clock used to clock data out on AUDATA0, AUDATA1, AUDATA2 and AUDATA3. LRCLK is the data framing clock whose frequency is typically equal to the sampling frequency. Both LRCLK and SCLK can be configured as either inputs (Slave mode) or outputs (Master mode). When LRCLK and SCLK are configured as inputs, MCLK is a don't care as an input. When LRCLK and SCLK are configured as outputs, they are derived from MCLK. Whether MCLK is configured as an input or an output, an internal divider from the MCLK signal is used to produce LRCLK and SCLK. The ratios shown in Table 16 give the possible SCLK values for different MCLK frequencies (all values in terms of the sampling frequency, Fs). MCLK (Fs) 128 384** 256 512 SCLK (Fs) 32 X X X X X 48 64 X X X X X X X X X 128 256 512 Alternatively AUDATA3 can be used for dual zone support. AUDATA3 is multiplexed with the XMT958 output so only one can be used at any one time. Table 17 shows the mapping of DAO channels to actual outputs when not in a multichannel mode. DAO_Channel 0 1 2 3 4 5 6 7 Subframe Left Right Left Right Left Right Left Right Signal AUDATA0 AUDATA0 AUDATA1 AUDATA1 AUDATA2 AUDATA2 AUDATA3 AUDATA3 Table 17. Output Channel Mapping Please consult the application code user's guides to determine what modes are supported by the application code being used. 10.5.1.IEC60958 Output The XMT958 output is shared with the AUDATA3 output so only one can be used at any one time. The XMT958 output provides a CMOS level bi phase encoded output. The XMT958 function can be internally clocked from the PLL or from an MCLK input if MCLK is 256Fs or 512Fs. All channel status information can be used when using software which supports this functionality. This output can be used for either 2 channel PCM output or compressed data output in accordance with IEC61937. To be fully IEC60958 compliant this output would need to be buffered through an RS422 device or an optocoupler as its outputs are only CMOS. Please consult software user's guide to determine if this pin is supported by the download code being used. ** For MCLK as an input only Table 16. MCLK/SCLK Master Mode Ratios AUDAT0 is configurable to provide six, four, or two channels. AUDATA1, AUDATA2 and AUDATA3 can both output two channels of data. Typically the AUDATA0, AUDATA1, AUDATA2 and AUDATA3 outputs are used in left justified, I2S or right justified modes. AUDATA0, AUDATA1 and AUDATA2 are used for 5.1 output, presenting all six channels of surround sound (Left, Center, Right, Left Surround, Right Surround and Subwoofer). AUDATA3 can be used with AUDATA0, AUDATA1 and AUDATA2 to support 7.1 output. DS339PP4 71 CS49300 Family DSP 11. HARDWARE CONFIGURATION After download or soft reset, and before kickstarting the application (please see the Audio Manager in the Application Messaging Section of any application code user's guide for more information on kickstarting), the host has the option of changing the default hardware configuration. Hardware configuration messages are used to physically reconfigure the hardware of the audio decoder, as in enabling or disabling address checking for the serial communication port. Hardware configuration messages are also used to initialize the data type (i.e., PCM or compressed) and format (e.g., I2S, Left Justified, Parallel, or Serial Bursty) for digital data inputs, as well as the data format and clocking options for the digital output port. In general, the hardware configuration can only be changed immediately after download or after soft reset. However, some applications provide the capability to change the input ports without affecting other hardware configurations after sending a special Application Restart message (please see the Audio Manager in any Application Code User's Guide to determine whether the Application Restart message is supported). Serial digital audio data bit placement and sample alignment is fully configurable in the CS493XX including left justified, right justified, delay bits or no delay bits, variable sample word sizes, variable output channel count, and programmable output channel pin assignments and clock edge polarity to integrate with most digital audio interfaces. If a mode is needed which is not presented, please consult your sales representative as to its availability. to send a 7-bit address along with a read/write bit at the start of any serial transaction. By default, address checking is disabled in the CS493XX. See below for how to enable address checking. The following 4-word hex message configures the address checking circuitry of the CS493XX: It should be noted that this will allow the host to enable address checking and change the address of the device. If address checking disabled is acceptable, then these messages do not need to be sent. 0x800252 0x00FFFF 0x800152 0xHH0000 In the last word the following bits should replace HH: Bits 23:17 - New Address to use for checking (if enabling address checking) Bit 16 1 = Address checking on 0 = Address checking off 11.2. Input Data Hardware Configuration Both data format (I2S, Left Justified, Parallel, or Serial Bursty) and data type (compressed or PCM) are required to fully define the input port's hardware configuration. The DAI and the CDI are configured by the same group of messages since their configurations are interrelated. The naming convention of the input hardware configuration is as follows: INPUT A B C D where A, B, C and D are the parameters used to fully define the input port. The parameters are defined as follows: A - Data Type B - Data Format (This is a don't care for parallel modes of data delivery) 11.1. Address Checking When using one of the serial communication modes, I2C or SPI, as discussed in Section 6.1, "Serial Communication" on page 33, it is necessary 72 DS339PP4 CS49300 Family DSP C - SCLK Polarity D - FIFO Setup (only valid for parallel modes of data delivery) The following tables show the different values for each parameter as well as the hex message that needs to be sent. When creating the hardware configuration message, only one hex message should be sent per parameter. It should be noted that the entire B parameter hex message must be sent, even if one of the input ports has been defined as unused by the A parameter. Hex A Value Data Type Message 0 DAI - PCM 0x800210 (default) CDI - Compressed 0x3FBFC0 0x800110 0x80002C 1 DAI - PCM and Compressed 0x800210 CDI - Unused 0x3FBFC0 0x800110 0xC0002C 2 DAI - Unused 0x800210 CDI - PCM 0x3FBFC0 0x800110 0x800020 0x800210 3 DAI - PCM CDI - Bursty Compressed (for 0x003FC0 0x800110 Broadcast-based Application 0x0E002C Codes Only) 4 DAI - Multichannel PCM 0x800210 (for Post-Processing Codes that can 0x3FBFC0 accept 2, 4 or 6 channels on one line) 0x800110 0x80002C CDI - PCM 5 DAI - PCM 0x800210 0x3FBFC0 CDI - Multichannel PCM 0x800110 (for Post-Processing Codes that can 0x800025 accept 2, 4 or 6 channels on one line) A Value Data Type 7 DAI - Not Used CDI - PCM Parallel Port - Compressed (FIFO B) (for Broadcast-based application codes only) Hex Message 0x800210 0x003FC0 0x800110 0x0E0023 8 DAI - Not Used CDI - Not Used Parallel Port - PCM (FIFO C) and Compressed (FIFO B) with Intel or Motorola Parallel Host Control (for Broadcast-based application codes only) 0x800210 0x003FC0 0x800110 0x0E0013 9 DAI - Not Used CDI - Not Used Parallel Port - Compressed (FIFO B) with I2C or SPI Serial Control DAI - Not Used CDI - Not Used Parallel Port - PCM (FIFO C) with I2C or SPI Serial Control 0x800210 0x003FC0 0x800110 0x0E0002 0x800118 0x000800 0x800210 0x003FC0 0x800110 0x0E0010 0x800118 0x000800 10 Table 18. Input Data Type Configuration (Input Parameter A) (Continued) B Value Data Format 2S 24-bit 0 PCM - I (default) Hex Message 0x800217 0x8080FF 0x80021A 2S 16-bit Compressed - I 0x8080FF (Compressed meaning any type of compressed data such as IEC61937- 0x800117 0x011100 packed AC-3, DTS, MPEG Multichannel, AAC or MP3 elementary 0x80011A stream data from a DVD or IEC60958- 0x011900 6 DAI - PCM CDI - Not Used Parallel Port - Compressed (FIFO B) (for Broadcast-based application codes only) 0x800210 0x003FC0 0x800110 0x0E002B packed elementary stream DTS data from a DTS-CD) Table 19. Input Data Format Configuration (Input Parameter B) Table 18. Input Data Type Configuration (Input Parameter A) DS339PP4 73 CS49300 Family DSP B Value Data Format 1 PCM - Left Justified 24-bit Hex Message 0x800217 0x8080FF Compressed - Left Justified 0x80021A 16-bit 0x8080FF (Compressed meaning any type of 0x800117 compressed data such as IEC61937- 0x001000 packed AC-3, DTS, MPEG 0x80011A Multichannel, AAC or MP3 elementary stream data from a DVD or IEC60958- 0x001800 0x800217 0x8080FF 0x80021A 0x8080FF 0x800117 0x0048C0 0x80011A 0x0119C0 0x800217 0x8080FF 0x80021A 0x8080FF 0x800117 0x0018C0 0x80011A 0x0119C0 0x800217 0x8080FF 0x80021A 0x8080FF 0x800117 0x0030C0 0x80011A 0x0119C0 0x800217 0x8080FF 0x80021A 0x8080FF 0x800117 0x0048C0 0x80011A 0x0018C0 B Value Data Format 32 PCM - Left Justified 24-bit Multichannel PCM (2 Channel) - Left Justified 24-bit (used only by special post-processing application codes) 2 packed elementary stream DTS data from a DTS-CD) PCM - I2S 24-bit 34 PCM - Left Justified 24-bit Multichannel PCM (4 Channel) - Left Justified 24-bit (used only by special post-processing application codes) Multichannel PCM (6 Channel) - Left Justified 24-bit PCM (for Post-Processing Codes that can accept 6 channels on one line like THX Surround EX application code) Hex Message 0x800217 0x8080FF 0x80021A 0x8080FF 0x800117 0x0018C0 0x80011A 0x0018C0 0x800217 0x8080FF 0x80021A 0x8080FF 0x800117 0x0030C0 0x80011A 0x0018C0 0x800217 0x8080FF 0x80021A 0x8080FF 0x800117 0x003CC0 0x80011A 0x0119C0 0x800217 0x8080FF 0x80021A 0x8080FF 0x800117 0x0014C0 0x80011A 0x0119C0 0x800217 0x8080FF 0x80021A 0x8080FF 0x800117 0x0014C0 0x80011A 0x0119C0 22 PCM - I2S 24-bit Multichannel PCM (2 Channel) - Left Justified 24-bit PCM (used only by special post-processing application codes) 4-6 7 Not Used PCM - I2S 24-bit Multichannel PCM (6 Channel) - Left Justified 20-bit (used by standard post-processing application codes like THX Surround EX) 24 PCM - I2S 24-bit Multichannel PCM (4 Channel) - Left Justified 24-bit PCM (used only by special post-processing application codes) 72 PCM - I2S 24-bit Multichannel PCM (2 Channel) - Left Justified 20-bit (used only by special post-processing application codes) 3 PCM - Left Justified 24-bit Multichannel PCM (6 Channel) - Left Justified 24-bit (for Post-Processing Codes that can accept 6 channels on one line like THX Surround EX application code) 74 PCM - I2S 24-bit Multichannel PCM (4 Channel) - Left Justified 20-bit (used only by special post-processing application codes) Table 19. Input Data Format Configuration (Input Parameter B) (Continued) Table 19. Input Data Format Configuration (Input Parameter B) (Continued) 74 DS339PP4 CS49300 Family DSP B Value Data Format 8 PCM - Left Justified 24-bit Multichannel PCM (6 Channel) - Left Justified 20-bit (for Post-Processing Codes that can accept 6 channels on one line like THX Surround EX application code) 82 PCM - Left Justified 24-bit Multichannel PCM (2 Channel) - Left Justified 20-bit (used only by special post-processing application codes) 84 PCM - Left Justified 24-bit Multichannel PCM (4 Channel) - Left Justified 20-bit (used only by special post-processing application codes) Hex Message 0x800217 0x8080FF 0x80021A 0x8080FF 0x800117 0x003CC0 0x80011A 0x0018C0 0x800217 0x8080FF 0x80021A 0x8080FF 0x800117 0x0014C0 0x80011A 0x0018C0 0x800217 0x8080FF 0x80021A 0x8080FF 0x800117 0x0028C0 0x80011A 0x0018C0 FIFO Size & Blocksize (no default - only applicable to D Value parallel delivery modes) 1 Compressed FIFO B Size 6kbyte Blocksize - up to 2kbyte 2 PCM FIFO C Size - 6kbyte Blocksize - up to 2kbyte Hex Message 0x800014 0x280D00 0x800014 0x820300 Table 21. Input FIFO Setup Configuration (Input Parameter D) per sub-frame. The DSP always uses 24-bit resolution for PCM input. Systems having less than 24-bit resolution will not have a problem as the extra bits taken by the DSP will be under the noise floor of the input signal for left justified and I2S formats. For compressed input, data is always taken in 16 bit word lengths. 2) If the clocks to the audio ports are known to be corrupted, such as when a S/PDIF receiver goes out of lock, the DSP should undergo an application restart (if applicable), soft reset or hard reset. All three actions will result in the input FIFO being reset. Failure to do so may result in corrupted data being latched into the input FIFO and may result in corrupted data being heard on the outputs. This is not an issue when compressed data is being delivered, as it has sync words embedded in the stream which the DSP can lock to, but only when PCM data is being delivered. Certain application codes that are capable of processing PCM may now have a special feature called "PCM Robustness" which does alleviate the above problem, however you should still follow the above recommendation. Table 19. Input Data Format Configuration (Input Parameter B) (Continued) SCLK Polarity (Both CDI & Hex C Value DAI Port) Message 0 Data Clocked in on Rising 0x800217 (default) Edge 0xFFFFDF 0x80021A 0xFFFFDF 1 Data Clocked in on Falling 0x800117 Edge 0x000020 0x80011A 0x000020 Table 20. Input SCLK Polarity Configuration (Input Parameter C) 11.2.1. Input Configuration Considerations 1) 24-bit PCM input requires at least 24 SCLKS DS339PP4 75 CS49300 Family DSP 11.3. Output Data Hardware Configuration The naming convention for the DAO configuration is as follows: OUTPUT A B C D E where the parameters are defined as: A - DAO Mode (Master/Slave for LRCLK and SCLK) B - Data Format C - MCLK Frequency D - SCLK Frequency E - SCLK Polarity The following tables show the different values for each parameter as well as the hex message that needs to be sent. When creating the hardware configuration message, only one hex message should be sent per parameter. DAO Modes (LRCLK & A Value SCLK) 0 MCLK - Slave (default) SCLK - Slave LRCLK - Slave 1 MCLK - Slave SCLK - Master LRCLK - Master 2 MCLK - Master SCLK - Master LRCLK - Master Hex Message 0x80017F 0x400000 0x80027F 0xBFFFFF 0x80027F 0xBFDFFF DAO Data Format Of AUDATA0, 1, 2 (or AUDATA0 Hex B Value for Multichannel Modes) Message 0 0x80027F I2S 24-bit (default) (Configuration of AUDATA3 as S/PDIF 0xFC7FFF (IEC60958) or Digital Audio in the 0x80027C format of I2S or Left Justified is 0xF01F00 covered in AN162 and AN163) 0x80027D 0xF01F00 0x80027E 0xF01F00 0x80017F 0x038000 0x80017C 0x000001 0x80017D 0x000001 0x80017E 0x000001 1 Left Justified 24-bit 0x80027F (Configuration of AUDATA3 as S/PDIF 0xFC7FFF (IEC60958) or Digital Audio in the 0x80027C format of I2S or Left Justified is 0xF01F00 covered in AN162 and AN163) 0x80027D 0xF01F00 0x80027E 0xF01F00 0x80017F 0x018000 2 Multichannel (6 channel) 0x80027F 20-bit Left Justified 0xFC7FFF (SCLK must be at least 128Fs 0x80027C for this mode) 0xF00000 (Configuration of AUDATA3 as S/PDIF 0x80017C (IEC60958) or Digital Audio in the 0x001300 format of I2S or Left Justified is 0x80027D covered in AN162 and AN163) 0xF00000 0x80017D 0x001300 0x80027E 0xF00000 0x80017E 0x001300 Table 23. Output Data Format Configuration (Parameter B) Table 22. Output Clock Configuration (Parameter A) 76 DS339PP4 CS49300 Family DSP DAO Data Format Of AUDATA0, 1, 2 (or AUDATA0 B Value for Multichannel Modes) 22 Multichannel (2 channel) 20-bit Left Justified (SCLK must be at least 128Fs for this mode) (Configuration of AUDATA3 as S/PDIF (IEC60958) or Digital Audio in the format of I2S or Left Justified is covered in AN162 and AN163) 24 Multichannel (4 channel) 20-bit Left Justified (SCLK must be at least 128Fs for this mode) (Configuration of AUDATA3 as S/PDIF (IEC60958) or Digital Audio in the format of I2S or Left Justified is covered in AN162 and AN163) 3 Multichannel (6 channel) 24-bit Left Justified (SCLK must be at least 256Fs for this mode) (Configuration of AUDATA3 as S/PDIF (IEC60958) or Digital Audio in the format of I2S or Left Justified is covered in AN162 and AN163) 32 Multichannel (2 channel) 24-bit Left Justified (SCLK must be at least 128Fs for this mode) (Configuration of AUDATA3 as S/PDIF (IEC60958) or Digital Audio in the format of I2S or Left Justified is covered in AN162 and AN163) Hex Message 0x80027F 0xFC7FFF 0x80017F 0x018000 0x80027C 0xF01F00 0x80017C 0x001300 0x80027F 0xFC7FFF 0x80017F 0x010000 0x80027C 0xF01F00 0x80017C 0x001300 0x80027F 0xFC7FFF 0x80027C 0xF01F00 0x80027D 0xF01F00 0x80027E 0xF01F00 0x80027F 0xFC7FFF 0x80027C 0xF01F00 0x80017F 0x018000 C Value MCLK Frequency 0 256Fs (default) 1 512Fs 2 128Fs 3 384Fs (SCLK must be 64Fs in this mode and MCLK must be an input) Hex Message 0x80027F 0xFFE7FF 0x80027F 0xFFE7FF 0x80017F 0x001000 0x80027F 0xFFE7FF 0x80017F 0x001800 0x80027F 0xFFE7FF 0x80017F 0x000800 Table 24. Output MCLK Configuration (Parameter C) D Value SCLK Frequency 0 64Fs (default) Hex Message 0x80027F 0xFFF8FF 0x80017F 0x000100 0x80027F 0xFFF8FF 0x80017F 0x000200 0x80027F 0xFFF8FF 0x80017F 0x000300 1 128Fs 2 256Fs 34 0x80027F 0xFC7FFF 0x80017F 0x010000 (Configuration of AUDATA3 as S/PDIF 0x80027C (IEC60958) or Digital Audio in the 0xF01F00 format of I2S or Left Justified is covered in AN162 and AN163) Multichannel (4 channel) 24-bit Left Justified (SCLK must be at least 128Fs for this mode) Table 25. Output SCLK Configuration (Parameter D) E Value SCLK Polarity 0 Data Valid on Rising Edge (default) (clocked out on falling) 1 Data Valid on Falling Edge (clocked out on rising) Hex Message 0x80027F 0xF7FFFF 0x80017F 0x080000 Table 23. Output Data Format Configuration (Parameter B) (Continued) Table 26. Output SCLK Polarity Configuration (Parameter E) DS339PP4 77 CS49300 Family DSP 11.3.1. Output Configuration Considerations 1) All PCM output is 24-bit resolution 2) An SCLK frequency of at least 128Fs must be selected for the 20-bit multichannel (6 channel) mode. 3) An SCLK frequency of at least 128Fs must be selected for the 24-bit multichannel (4 channel) mode. 4) An SCLK frequency of at least 256Fs must be selected for the 24-bit multichannel (6 channel) mode. 5) If the clocks to the audio ports are known to be corrupted, such as when a S/PDIF receiver goes out of lock, the DSP should undergo an application restart (if applicable), soft reset or hard reset. All three actions will result in the input FIFO being reset. Failure to do so may result in corrupted data being latched into the input FIFO and may result in corrupted data being heard on the outputs. This is not an issue when compressed data is being delivered, as it has sync words embedded in the stream which the DSP can lock to, but only when PCM data is being delivered. Certain application codes that are capable of processing PCM may now have a special feature called "PCM Robustness" which does alleviate the above problem, however you should still follow the above recommendation. is acceptable. This example can be easily expanded to fit other system requirements. For example if the host system has the following configuration: Address Checking: Disabled The above configuration is default so no configuration message is required. DAI: Left Justified PCM and Compressed data CDI: Not used The above configuration corresponds to INPUT A1 B1 which corresponds to a configuration message of: 0x800210 0x3FBFC0 0x800110 0xC0002C 0x800217 0x8080FF 0x80021A 0x8080FF 0x800117 0x001000 0x80011A 0x001800 DAO: Left Justified slave mode (LRCLK, SCLK inputs) MCLK @ 256Fs SCLK @ 64Fs The above configuration corresponds to OUTPUT A0 B1 C0 D0 which has a configuration message of: 0x80027F 0xFC7FFF 0x80027C 0xF01F00 0x80027D 0xF01F00 11.4. Creating Hardware Configuration Messages The single hardware configuration message that must be sent to the CS493XX after download or soft reset should be a concatenation of the messages in the previous sections. The complete hardware configuration message should be created by taking a message for each parameter (where the default is not acceptable) and concatenating the messages together. No messages need to be sent if the default configuration for a particular parameter 78 DS339PP4 CS49300 Family DSP 0x80027E 0xF01F00 0x80017F 0x018000 Concatenating the messages together gives the following hardware configuration message that should be sent after download or soft reset: WORD# 1 2 3 4 5 6 7 8 9 10 11 VALUE 0x800210 0x3FBFC0 0x800110 0xC0002C 0x800217 0x8080FF 0x80021A 0x8080FF 0x800117 0x001000 0x80011A WORD# 12 13 14 15 16 17 18 19 20 21 22 VALUE 0x001800 0x80027F 0xFC7FFF 0x80027C 0xF01F00 0x80027D 0xF01F00 0x80027E 0xF01F00 0x80017F 0x018000 Table 27. Example Values to be Sent to CS493XX After Download or Soft Reset DS339PP4 79 CS49300 Family DSP 12. PIN DESCRIPTIONS VD1 DGND1 AUDATA3, XMT958 WR,DS,EMWR,GPIO10 RD,R/W,EMOE,GPIO11 A1, SCDIN A0, SCCLK DATA7,EMAD7,GPIO7 DATA6,EMAD6,GPIO6 DATA5,EMAD5,GPIO5 DATA4,EMAD4,GPIO4 VD2 DGND2 DATA3,EMAD3,GPIO3 DATA2,EMAD2,GPIO2 DATA1,EMAD1,GPIO1 DATA0,EMAD0,GPIO0 CS SCDIO, SCDOUT,PSEL,GPIO9 ABOOT, INTREQ EXTMEM, GPIO8 SDATAN1 6 5 4 3 2 1 44 43 42 41 40 7 39 8 38 9 37 10 36 11 35 CS493XX-CL 12 34 44-pin PLCC 13 33 14 32 Top View 15 31 16 30 17 29 18 19 20 21 22 23 24 25 26 27 28 MCLK SCLK LRCLK AUDATA0 AUDATA1 AUDATA2 DC DD RESET AGND VA FILT1 FILT2 CLKSEL CLKIN CMPREQ, LRCLKN2 CMPCLK, SCLKN2 CMPDAT, SDATAN2, RCV958 LRCLKN1 SCLKN1, STCCLK2 DGND3 VD3 VA--Analog Positive Supply: Pin 34 Analog positive supply for clock generator. Nominally +2.5 V. AGND--Analog Supply Ground: Pin 35 Analog ground for clock generator PLL. VD1, VD2, VD3--Digital Positive Supply: Pins 1, 12, 23 Digital positive supplies. Nominally +2.5 V. DGND1, DGND2, DGND3--Digital Supply Ground: Pins 2, 13, 24 Digital ground. FILT1--Phase-Locked Loop Filter: Pin 33 Connects to an external filter for the on-chip phase-locked loop. FILT2--Phase Locked Loop Filter: Pin 32 Connects to an external filter for the on-chip phase-locked loop. CLKIN--Master Clock Input: Pin 30 CS493XX clock input. When in internal clock mode (CLKSEL == DGND), this input is connected to the internal PLL from which all internal clocks are derived. When in external clock mode (CLKSEL == VD), this input is connected to the DSP clock. INPUT 80 DS339PP4 CS49300 Family DSP CLKSEL--DSP Clock Select: Pin 31 This pin selects the clock mode of the CS493XX. When CLKSEL is low, CLKIN is connected to the internal PLL from which all internal clocks are derived. When CLKSEL is high CLKIN is connected to the DSP clock. INPUT DATA7, EMAD7, GPIO7--Pin 8 DATA6, EMAD6, GPIO6--Pin 9 DATA5, EMAD5, GPIO5--Pin 10 DATA4, EMAD4, GPIO4--Pin 11 DATA3, EMAD3, GPIO3--Pin 14 DATA2, EMAD2, GPIO2--Pin 15 DATA1, EMAD1, GPIO1--Pin 16 DATA0, EMAD0, GPIO0--Pin 17 In parallel host mode, these pins provide a bidirectional data bus. If a serial host mode is selected, these pins can provide a multiplexed address and data bus for connecting an 8-bit external memory. Otherwise, in serial host mode, these pins can act as general-purpose input or output pins that can be individually configured and controlled by the DSP. BIDIRECTIONAL - Default: INPUT A0, SCCLK--Host Parallel Address Bit Zero or Serial Control Port Clock: Pin 7 In parallel host mode, this pin serves as one of two address input pins used to select one of four parallel registers. In serial host mode, this pin serves as the serial control clock signal, specifically as the SPI clock input or the I2C clock input. INPUT A1, SCDIN--Host Address Bit One or SPI Serial Control Data Input: Pin 6 In parallel host mode, this pin serves as one of two address input pins used to select one of four parallel registers. In SPI serial host mode, this pin serves as the data input. INPUT RD, R/W, EMOE, GPIO11--Host Parallel Output Enable or Host Parallel R/W or External Memory Output Enable or General Purpose Input & Output Number 11: Pin 5 In Intel parallel host mode, this pin serves as the active-low data bus enable input. In Motorola parallel host mode, this pin serves as the read-high/write-low control input signal. In serial host mode, this pin can serve as the external memory active-low data-enable output signal. Also in serial host mode, this pin can serve as a general purpose input or output bit. BIDIRECTIONAL - Default: INPUT WR, DS, EMWR, GPIO10--Host Write Strobe or Host Data Strobe or External Memory Write Enable or General Purpose Input & Output Number 10: Pin 4 In Intel parallel host mode, this pin serves as the active-low data-write-input strobe. In Motorola parallel host mode, this pin serves as the active-low data-strobe-input signal. In serial host mode, this pin can serve as the external-memory active-low write-enable output signal. Also in serial host mode, this pin can serve as a general purpose input or output bit. BIDIRECTIONAL - Default: INPUT DS339PP4 81 CS49300 Family DSP CS--Host Parallel Chip Select, Host Serial SPI Chip Select: Pin 18 In parallel host mode, this pin serves as the active-low chip-select input signal. In serial host SPI mode, this pin is used as the active-low chip-select input signal. INPUT RESET--Master Reset Input: Pin 36 Asynchronous active-low master reset input. Reset should be low at power-up to initialize the CS493XX and to guarantee that the device is not active during initial power-on stabilization periods. At the rising edge of reset the host interface mode is selected contingent on the state of the RD, WR and PSEL pins. Additionally, an autoboot sequence can be initiated if a serial control mode is selected and ABOOT is held low. If reset is low all bidirectional pins are high impedance inputs. INPUT SCDIO, SCDOUT, PSEL, GPIO9--Serial Control Port Data Input and Output, Parallel Port Type Select: Pin 19 In I2C mode, this pin serves as the open-drain bidirectional data pin. In SPI mode this pin serves as the data output pin. In parallel host mode, this pin is sampled at the rising edge of RESET to configure the parallel host mode as an Intel type bus or as a Motorola type bus. In parallel host mode, after the bus mode has been selected, the pin can function as a generalpurpose input or output pin. BIDIRECTIONAL - Default: INPUT In I2C mode this pin is an OPEN DRAIN I/O and requires a 4.7k Pull-Up EXTMEM, GPIO8--External Memory Chip Select or General Purpose Input & Output Number 8: Pin 21 In serial control port mode, this pin can serve as an output to provide the chip-select for an external byte-wide ROM. In parallel and serial host mode, this pin can also function as a general-purpose input or output pin. BIDIRECTIONAL - Default: INPUT INTREQ, ABOOT--Control Port Interrupt Request, Automatic Boot Enable: Pin 20 Open-drain interrupt-request output. This pin is driven low to indicate that the DSP has outgoing control data and should be serviced by the host. Also in serial host mode, this signal initiates an automatic boot cycle from external memory if it is held low through the rising edge of reset. OPEN DRAIN I/O - Requires 4.7k Ohm Pull-Up AUDATA2--Digital Audio Output 2: Pin 39 PCM multi-format digital-audio data output, capable of two-channel 20-bit output. This PCM output defaults to DGND as output until enabled by the DSP software. OUTPUT AUDATA1--Digital Audio Output 1: Pin 40 PCM multi-format digital-audio data output, capable of two-channel 20-bit output. This PCM output defaults to DGND as output until enabled by the DSP software. OUTPUT AUDATA0--Digital Audio Output 0: Pin 41 PCM multi-format digital-audio data output, capable of two-, four-, or six-channel 20-bit output. This PCM output defaults to DGND as output until enabled by the DSP software. OUTPUT 82 DS339PP4 CS49300 Family DSP MCLK--Audio Master Clock: Pin 44 Bidirectional master audio clock. MCLK can be an output from the CS493XX that provides an oversampled audio-output clock at either 128 Fs, 256 Fs, or 512 Fs. MCLK can be an input at 128 Fs, 256 Fs, 384 Fs, or 512 Fs. MCLK is used to derive SCLK and LRCLK when SCLK and LRCLK are driven by the CS493XX. BIDIRECTIONAL - Default: INPUT SCLK--Audio Output Bit Clock: Pin 43 Bidirectional digital-audio output bit clock. SCLK can be an output that is derived from MCLK to provide 32 Fs, 64 Fs, 128 Fs, 256 Fs, or 512 Fs, depending on the MCLK rate and the digital-output configuration. SCLK can also be an input and must be at least 48Fs or greater. As an input, SCLK is independent of MCLK. BIDIRECTIONAL - Default: INPUT LRCLK--Audio Output Sample Rate Clock: Pin 42 Bidirectional digital-audio output-sample-rate clock. LRCLK can be an output that is divided from MCLK to provide the output sample rate depending on the output configuration. LRCLK can also be an input. As an input LRCLK is independent of MCLK. BIDIRECTIONAL - Default: INPUT AUDATA3,XMT958--SPDIF Transmitter Output, Digital Audio Output 3: Pin 3 CMOS level output that contains a biphase-mark encoded (S/PDIF) or I2S or Left Justified digital audio data which is capable of carrying two channels of PCM digital audio or an IEC61937 compressed-data interface. Note: Outputting of IEC61937 is only available for certain broadcast-based application codes which run on the CS4931X family or CS49330 device. This output typically connects to the input of an RS-422 transmitter or to the input of an optical transmitter. OUTPUT SCLKN1, STCCLK2--PCM Audio Input Bit Clock: Pin 25 Bidirectional digital-audio bit clock that is an output in master mode and an input in slave mode. In slave mode, SCLKN1 operates asynchronously from all other CS493XX clocks. In master mode, SCLKN1 is derived from the CS493XX internal clock generator. In either master or slave mode, the active edge of SCLKN1 can be programmed by the DSP. For applications supporting PES layer synchronization this pin can be used as STCCLK2, which provides a path to the internal STC 33 bit counter. BIDIRECTIONAL - Default: INPUT LRCLKN1--PCM Audio Input Sample Rate Clock: Pin 26 Bidirectional digital-audio frame clock that is an output in master mode and an input in slave mode. LRCLKN1 typically is run at the sampling frequency. In slave mode, LRCLKN1 operates asynchronously from all other CS493XX clocks. In master mode, LRCLKN1 is derived from the CS493XX internal clock generator. In either master or slave mode, the polarity of LRCLKN1 for a particular subframe can be programmed by the DSP. BIDIRECTIONAL - Default: INPUT DS339PP4 83 CS49300 Family DSP SDATAN1--PCM Audio Data Input Number One: Pin 22 Digital-audio data input that can accept from one to six channels of compressed or PCM data. SDATAN1 can be sampled with either edge of SCLKN1, depending on how SCLKN1 has been configured. INPUT CMPCLK, SCLKN2--PCM Audio Input Bit Clock: Pin 28 Bidirectional digital-audio bit clock that is an output in master mode and an input in slave mode. In slave mode, SCLKN2 operates asynchronously from all other CS493XX clocks. In master mode, SCLKN2 is derived from the CS493XX internal clock generator. In either master or slave mode, the active edge of SCLKN2 can be programmed by the DSP. If the CDI is configured for bursty delivery, CMPCLK is an input used to sample CMPDAT. BIDIRECTIONAL - Default: INPUT CMPREQ, LRCLKN2--PCM Audio Input Sample Rate Clock: Pin 29 When the CDI is configured as a digital audio input, this pin serves as a bidirectional digitalaudio frame clock that is an output in master mode and an input in slave mode. LRCLKN2 typically is run at the sampling frequency. In slave mode, LRCLKN2 operates asynchronously from all other CS493XX clocks. In master mode, LRCLKN2 is derived from the CS493XX internal clock generator. In either master or slave mode, the polarity of LRCLKN2 for a particular subframe can be programmed by the DSP. When the CDI is configured for bursty delivery, or parallel audio data delivery is being used, CMPREQ is an output which serves as an internal FIFO monitor. CMPREQ is an active low signal that indicates when another block of data can be accepted. BIDIRECTIONAL - Default: INPUT CMPDAT, SDATAN2--PCM Audio Data Input Number Two: Pin 27 Digital-audio data input that can accept from one to six channels of compressed or PCM data. SDATAN2 can be sampled with either edge of SCLKN2, depending on how SCLKN2 has been configured. Similarly CMPDAT is the compressed data input pin when the CDI is configured for bursty delivery. When in this mode, the CS493XX internal PLL is driven by the clock recovered from the incoming data stream. INPUT DC--Reserved: Pin 38 This pin is reserved and should be pulled up with an external 4.7k resistor. DD--Reserved: Pin 37 This pin is reserved and should be pulled up with an external 4.7k resistor. 84 DS339PP4 CS49300 Family DSP 13. ORDERING INFORMATION CS493002-CL CS493102-CL CS493112-CL CS493122-CL CS493253-CL CS493253-IL CS493254-CL CS493254-IL CS493263-CL CS493263-IL CS493264-CL CS493264-IL CS493292-CL CS493302-CL CS493302-IL 44-Pin PLCC 44-Pin PLCC 44-Pin PLCC 44-Pin PLCC 44-Pin PLCC 44-Pin PLCC 44-Pin PLCC 44-Pin PLCC 44-Pin PLCC 44-Pin PLCC 44-Pin PLCC 44-Pin PLCC 44-Pin PLCC 44-Pin PLCC 44-Pin PLCC Temp Range 0-70 C Temp Range 0-70 C Temp Range 0-70 C Temp Range 0-70 C Temp Range 0-70 C Temp Range -40-85 C Temp Range 0-70 C Temp Range -40-85 C Temp Range 0-70 C Temp Range -40-85 C Temp Range 0-70 C Temp Range -40-85 C Temp Range 0-70 C Temp Range 0-70 C Temp Range -40-85 C 14. PACKAGE DIMENSIONS 44L PLCC PACKAGE DRAWING e D2/E2 E1 E B D1 D A A1 INCHES DIM A A1 B D D1 D2 E E1 E2 e MIN 0.165 0.090 0.013 0.685 0.650 0.590 0.685 0.650 0.590 0.040 MAX 0.180 0.120 0.021 0.695 0.656 0.630 0.695 0.656 0.630 0.060 MIN 4.191 2.286 .330 17.399 16.510 14.986 17.399 16.510 14.986 .102 MILLIMETERS MAX 4.572 3.048 0.533 17.653 16.662 16.002 17.653 16.662 16.002 1.524 DS339PP4 85 |
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