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E2U0025-29-82
Semiconductor MSM7575
Semiconductor Multi-Function PCM CODEC
This version: Aug. 1999 MSM7575 Previous version: Jan. 1998
GENERAL DESCRIPTION
The MSM7575, developed for advanced digital cordless telephone systems, is a single channel full duplex CODEC which performs mutual transcoding between the analog voice band signal and the 64 kbps PCM serial data. This device performs DTMF tone and several kinds of tone generation, transmit/receive data mute and gain control, side-tone pass and its gain control, and VOX function. Using advanced circuit technology, this device operates from a single 3 V power supply and provides low power consumption.
FEATURES
VDD: 2.7 V to 3.6 V * Single 3 V Power Supply Operation * Transmit/Receive Full-Duplex Single Channel Operation * Transmit/Receive Synchronous Mode Only A-law/-law/linear (2's complement) Selectable * PCM Interface Data Format : 64 kbps to 2048 kbps * Serial PCM Transmission Data Rate : * Low Power Consumption Operating Mode : 24 mW Typ. (VDD = 3.0 V) Power-Down Mode : 0.03 mW Typ. (VDD = 3.0 V) Externally Gain Adjustable * Two Analog Input Amplifier Stages: * Analog Output Stage Push-pull Drive (direct drive of 350 W + 120 nF) 9.600/19.200 MHz Selectable * Master Clock Frequency : * Transmit/Receive Mute, Transmit/Receive Programmable Gain Control (8-step Level Adjustment) * Side Tone Path with Programmable Attenuation * Built-in DTMF Tone Generator * Built-in Various Ringing Tones Generator * Built-in Various Ring Back Tone Generator * Control by Serial MCU Interface * Built-in VOX Control Transmit side : Voice/Silence Signal Detect Receive side : Background Noise Generation * Built-in Op-amps and Analog Switches for Various Analog Interfaces. * Package: 64-pin plastic QFP (QFP64-P-1414-0.80-BK)(Product name : 7575GS-BK)
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Semiconductor
BLOCK DIAGRAM
SG SGB
V DD DG AG
AIN1+ AIN1GSX1 AIN2 GSX2 AOUT+
+ -
Voice Signal Detect P / S
VOXO VOXI
+ -
Prefilter
A/D
BPF ATT
Compand
PCMSO
XSYNC -1 VREF AOUTPWI VFRO SAO -1 -1
+ + -
ATT
Tone GEN. BCLK ATT Back ground Noise Gen.
RSYNC S / P
Postfilter
D/A
LPF
+
+ ATT
Expand
PCMRI
RINGC REF1 AVIN REF2 AIN3+ AIN3GSX3 AIN4+ AIN4GSX4
+ + + +
To each circuit
TOUT1 TOUT2 TOUT3 DIN DOUT DEN EXCK V DD V DD Clock/ Timing
MCU Interface V DD
MSM7575
SW1
SW2
SW3
SW4
SW5
SW6
SW7
SW8
SW9
PDN/ RESET
MCK
X1
X2
IO1
IO3 IO2
IO5 IO4
IO7 IO6
IO9 IO8
IO10
IO12 IO11
IO13
IO14
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Semiconductor
MSM7575
PIN CONFIGURATION (TOP VIEW)
PDN/RESET
VOXI VOXO DOUT DIN EXCK DEN PCMRI PCMSO RSYNC XSYNC BCLK DG IO1 IO2 IO3 IO4
,
MCK NC NC X2 64 63 62 61
TOUT3
TOUT2
TOUT1
RINGC
REF2
REF1
AVIN 50
VDD
NC
60
59
58
57
56
55
54
53
52
51
1 2 3 4 5 6 7 8 9
49
NC
X1
48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33
AOUT+ AOUTPWI VFRO SAO GSX2 AIN2 GSX1 AIN1AIN1+ GSX4 AIN4AIN4+ GSX3 AIN3AIN3+
10 11 12 13 14 15 16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31 SG
NC
NC
NC
IO5
IO6
IO7
IO8
IO9
IO10
IO11
IO12
IO13
IO14
64-Pin Plastic QFP
NC : No connect pin
SGB
AG
32
3/25
Semiconductor
MSM7575
PIN AND FUNCTIONAL DESCRIPTIONS
AIN1+, AIN1-, AIN2, GSX1, GSX2 Transmit analog input and the output for transmit gain adjustment. The pin AIN1- (AIN2) connects to the inverting input of the internal transmit amplifier, and the pin AIN1+ connects to the non-inverting input of the internal transmit amplifier. The pin GSX1 (GSX2) connects to output of the internal transmit amplifier. Gain adjustment should be referred to Fig. 1. VFRO, AOUT+, AOUT-, PWI, SAO, RINGC Used for the receive analog output and the output for receive gain adjustment. VFRO is an output of the receive filter. AOUT+ and AOUT- are differential analog signal outputs which can directly drive ZL = 350 W + 120 nF or the 1.2 kW load. Gain adjustment should be referred to Fig. 1. The ORed signal with the control register data CR4-B5 and the external pin RINGC determines the output pins (AOUT+ and AOUT- /SAO+ and SAO-) for the speech signal and an acoustic component of the sounder tone, DTMF tone, R tone, F tone, various kinds of tones at either the VFRO pin or the SAO pin.
AIN1- Differential Analog Input Vi C1 R1 R2 AIN1+ C1 10 mF + - C2 R3 R4 Transmit Gain: V GSX2 /Vi = (R2/R1) (R4/R3) Receive Gain: Vo/V VFRO = 2 (R6/R5) GSX2 VFRO R5 PWI R6 AOUT- Z L = 120 nF + 350 W Differential Analog Output R1 R2 GSX1 SG AIN2
- +
V REF
0.1 mF
- + to ENCODER
from DECODER
SELECT
- +
from MCU INT.
VO
AOUT+
-1
TOUT1 TOUT2
SAO Sounder Output Signal +1 RINGC
+ -
from MCU INT. TOUT3
Figure 1 Analog Input/Output Interface 4/25
Semiconductor TOUT1, TOUT2, TOUT3
MSM7575
These are pins for outputs of the NOR gates whose inputs are the comparator output signal between the SAO output level and the SG level, and each register signal stored by the MCU interface. The each output is NOR-gated with the comparator output and the invented signal of CR1-B7 at TOUT3, the inverted signal of CR1-B6 at TOUT2, and the inverted signal of CR1-B5 at TOUT1. AVIN, REF1, REF2 These pins are for inputs of two comparators internal to the device. AVIN is connected to each non-inverting input of comparator1 and comparator2. REF1 is connected to an inverting input of comparator1 and REF2 is connected to an inverting input of comparator2. The output of each comparator is connected to the input of ENOR. The interval analog switch SW1 is ON/OFF controlled by the output which is the logical OR of the ENOR and the CR5-B7 signal. When CR5B7 is at "0", the SW1 is turned to OFF if AVIN is within the voltage range of REF1 and REF2 and the SW1 is turned to ON if AVIN is out of the voltage range of REF1 and REF2. AIN3+, AIN3-, GSX3, AIN4+, AIN4-, GSX4 These pins are for inputs and outputs of the internal op-amps. Refer to BLOCK DIAGRAM for the connection. IO1 to IO14 These pins are for inputs and outputs of the internal analog switch. Refer to BLOCK DIAGRAM and FUNCTIONAL DESCRIPTION for the connection and the control method. X1, X2 Crystal oscillator connection pins. X2 is for the clock output pin. When a conventional external clock is used, X1 should be connected to the ground, X2 should be left open, and the clock should be input to the MCK pin.
For the use of a self-oscilation circut MSM7575 X1 X2 MCK X1 For the use of an external clock MSM7575 X2 MCK
9.6 MHz or 19.2 MHz
9.6 MHz or 19.2 MHz
Figure 2 Connection to a Crystal Oscillator or an External Clock
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Semiconductor SG, SGB
MSM7575
Analog signal ground output. The output voltage is about 1.4 V. The bypass capacitors (10 F in parallel with 0.1 F ceramic type) should be put between this pin and AG to get the specified noise characteristics. This output voltage is 0 V during power-down. AG Analog ground. DG Digital ground. This ground is separated from the analog signal ground(AG) in this device. The DG pin must be kept as close to the AG pin possible on the PCB. VDD +3 V power supply. PDN/RESET Power down and reset control input. "L" level makes the whole chip enter to power down state, and, at the same time, all of control register data are reset to the initial state. Set this pin to "H" level during normal operating mode. The power down state is controlled by a logical OR with CR0-B5 of the control register. When using the pin PDN/RESET for the power down and reset control, CR0-B5 should be set to digital "0". MCK Master clock input. The frequency must be 9.6 MHz or 19.2 MHz. The applied clock frequency is selected by the control register data CR0-B6. The master clock signal is allowed to be asynchronous with BCLK, XSYNC, and RSYNC. PCMSO Transmit PCM data output. This PCM output signal is output from MSB in synchronization with the rising edge of BCLK or XSYNC. A pull-up resistor must be connected to this pin, because this output is configuared as an open drain. During power down, this output is at high impedance state.
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Semiconductor PCMRI Receive PCM data input. This PCM input signal is shifted on the falling edge of BCLK and input from MSB. BCLK Shift clock input for the PCM data (PCMSO, PCMRI). The frequency is set in the range of 64 kHz to 2048 kHz. XSYNC
MSM7575
8 kHz synchronous signal input for Transmit PCM data. This signal should be synchronized with BCLK. XSYNC is used for indicating MSB of the transmit serial PCM. Be sure to input the XSYNC signal because it is also used as the input of the timing circuit and the clock source of the tone generator. RSYNC 8 kHz synchronous signal input for Receive PCM data. This signal should be synchronized with BCLK signal. RSYNC is used for indicating the MSB of the receive serial PCM.
BCLK XSYNC PCMSO RSYNC PCMRI MSB 8kHz (125ms) LSB MSB LSB
Figure 3 PCM Interface Basic Timing Diagram
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Semiconductor VOXO
MSM7575
Transmit VOX function signal output. VOX function is to recognize the presence or absence of the transmit voice signal by detecting the signal energy. "H" and "L" levels set to this pin correspond to the presence and the absence, respectively. This result appears also at the register data CR7-B7. The signal energy detect threshold is set by the control register data CR6-B6, B5. VOXI Signal input for receive VOX function. The "H" level at VOXI indicates the presence of voice signal, the decoder block processes normal receive signal, and the voice signal appears at analog output pins . The "L" level indicates the absence of voice signal, the background noise generated in this device is transferred to the analog output pins. The background noise amplitude is set by the control register CR6. Because this signal is ORed with the register data CR6-B3, the control register data CR6-B3 should be set to digital "0".
Voice Input GSX2 (Absence) VOXO (Presence) TVXON Presence Detect (Presence) TVXOFF Absence Detect (Hang-over time)
(a) Transmit VOX Function Timing Diagram
(Absence) VOXI (Presence) (Presence)
Voice Output VFRO Normal Voice Signal Decoded Time period Background Noise
(b) Receive VOX Function (CR6-B3: digital "0") Timing Diagram Note: VOXO, VOXI function become valid when setting CR6-B7 to digital "1".
Figure 4 VOX Function 8/25
Semiconductor
MSM7575
DEN , EXCK, DIN, DOUT
Serial control ports for MCU interface. Reading and writing data is performed by an external MCU through these pins. Total 8 registers with 8 bits are provided on the devices. DEN is the "Enable" control signal input, EXCK is the data shift clock input, DIN is the address and data input, and DOUT is the data output from which inverted data of the contents of the register is output. Fig.5 shows the input or output timing diagram.
DEN
EXCK DIN
DOUT
DEN
EXCK DIN
DOUT
Register map is shown below.
Address A1 0 0 1 1 0 0 1 1
Name CR0 CR1 CR2 CR3 CR4 CR5 CR6 CR7
, ,
W A2 A1 A0 B7 B6 B5 B4 B3 B2 B1 B0 High Impedance (a) Write Data Timing Diagram R A2 A1 A0 High Impedance B7 B6 B5 B4 B3 B2 B1 B0 (b) Read Data Timing Diagram
Figure 5 MCU Interface Input/Output Timing
Table-1
Control and Detect Data B4 TX -- B3 RX -- PDN PDN
A2 0 0 0 0 1 1 1 1
A0 0 1 0 1 0 1 0 1
B7
B6
B5
B2 --
B1
B0
R/W R/W
A/m
MCK SEL
PDN ALL
SEL
LNR --
PDN
SAO/AOUT
TOUT3 -CONT TX
TOUT2 -CONT TX GAIN2
TOUT1 -CONT TX GAIN1
--
RX PAD R/W RX R/W R/W R/W R/W R/W R
TX
RX
RX
RX
ON/OFF
GAIN0 TONE
ON/OFF TONE GAIN3
GAIN2 TONE
GAIN1 TONE
GAIN0 TONE
Side Tone Side Tone Side Tone GAIN2 DTMF/ OTHERS SEL SW7CONT VOX GAIN1 TONE SEND SW8CONT ON GAIN0 SAO/ VFRO SW9CONT ON
ON/OFF TONE4 SW5&
GAIN2
GAIN1
GAIN0
TONE3 SW4CONT VOX IN --
TONE2 SW3CONT LEVEL SEL --
TONE1 SW2CONT LVL1 --
TONE0 SW1CONT LVL0 --
SW6-CONT OFF TIME --
RX NOISE RX NOISE RX NOISE
ON/OFF LVL1 LVL0 VOX TX NOISE TX NOISE OUT LVL1 LVL0
R/W : Enable to read/write
R : Read only register. 9/25
Semiconductor
MSM7575
ABSOLUTE MAXIMUM RATINGS
Parameter Power Supply Voltage Analog Input Voltage Digital Input Voltage Operating Temperature Storage Temperature Symbol VDD VAIN VDIN Top TSTG Condition -- -- -- -- -- Rating -0.3 to +5 - 0.3 to VDD + 0.3 -0.3 to VDD + 0.3 -30 to +85 -55 to +150 Unit V V V C C
RECOMMENDED OPERATING CONDITIONS
Parameter Power Supply Voltage Operating Temperature Range Input High Voltage Symbol VDD Ta VIH Condition -- -- MCK, XSYNC, RSYNC, PCMRI, RINGC, BCLK, VOXI, PDN/RESET, DEN, EXCK, DIN MCK, XSYNC, RSYNC, PCMRI, Input Low Voltage VIL fMCK1 fMCK2 fBCK fSYNC DC tIr RINGC, BCLK, VOXI, PDN/RESET, DEN, EXCK, DIN Master Clock Frequency Bit Clock Freqency Synchronous Signal Frequncy Clock Duty Ratio Digital Input Rise Time MCK (CR0-B6 = "0") MCK (CR0-B6 = "0") BCLK XSYNC, RSYNC MCK, BCLK, EXCK MCK, XSYNC, RSYNC, PCMRI, RINGC, BCLK, VOXI, PDN/RESET, DEN, EXCK, DIN MCK, XSYNC, RSYNC, PCMRI, Digital Input Fall Time tIf tXS tSX tRS tSR tWS tDS tDH RDL Digital Output Load Bypass Capacitors for SG CDL CSG RINGC, BCLK, VOXI, PDN/RESET, DEN, EXCK, DIN Transmit Sync Signal Setting Time Receive Sync Signal Setting Time Synchronous Signal Width PCM Set-up Time PCM Hold Time BCLK to XSYNC XSYNC to BCLK BCLK to RSYNC RSYNC to BCLK XSYNC, RSYNC -- -- PCMSO (Pull-up Resistor) TOUT1, TOUT2, TOUT3, PCMSO, VOXO, DOUT SG to AG 100 100 100 100 1 BCLK 100 100 500 -- 10 + 0.1 -- -- -- -- -- -- -- -- -- -- -- -- -- -- 100 -- -- -- 100 -- ns ns ns ns ms ns ns W pF mF -- -- 50 ns -- -- 50 ns -0.01% -0.01% 64 -- 30 9.600 19.200 -- 8.0 50 +0.01% +0.01% 2048 -- 70 MHz MHz kHz kHz % 0 -- 0.16 VDD V 0.45 VDD -- VDD V Min. +2.7 -25 Typ. -- +25 Max. +3.6 +70 Unit V C
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Semiconductor
MSM7575
ELECTRICAL CHARACTERISTICS
DC and Digital Interface Characteristics
(VDD = 2.7 V to 3.6 V, Ta = -25C to +70C) Parameter Power Supply Current Input High Voltage Input Low Voltage Input Leakage Current Output High Voltage Output Low Voltage Output Leakage Current Input Capacitance Output Resistance Symbol IDD1 IDD2 VIH VIL IIH IIL VOH VOL IO CIN ROSG SG VI = VDD VI = 0 V IOH = 0.4 mA IOH = 1 mA 1 LSTTL, Pull-up: 500 W PCMSO -- Condition Operating Mode, (VDD = 3.0 V) Power Down Mode, (VDD = 3.0 V) -- -- Min. -- -- 0.45VDD 0.0 -- -- 0.5 VDD 0.8 VDD 0.0 -- -- -- Typ. 8 0.01 -- -- -- -- -- -- 0.2 -- 5 25 Max. 6 0.1 VDD 0.16VDD 2.0 0.5 VDD VDD 0.4 10 -- 50 Unit mA mA V V mA mA V V V mA pF kW
Transmit Analog Interface Characteristics
(VDD = 2.7 V to 3.6 V, Ta = -25C to +70C) Parameter Input Resistance Output Load Resistance Output Load Capacitance Output Amplitude Input Offset Voltage Symbol RINX RLGX CLGX VOGX VOFGX Condition AIN1+ , AIN1- , AIN2 GSX1, GSX2 GSX1, GSX2 GSX1, GSX2, RL = 20 kW Pre-OPAMPs Min. 10 20 -- -- -20 Typ. -- -- -- -- -- Max. -- -- 100 1.30 (*1) 20 Unit MW kW pF VPP mV
*1 -7.7 dBm (600 W) = 0 dBm0, + 3.17 dBm0 = 1.30 VPP (m-law Selected)
11/25
Semiconductor Receive Analog Interface Characteristics
MSM7575
(VDD = 2.7 V to 3.6 V, Ta = -25C to +70C) Parameter Input Resistance Output Load Resistance Output Load Capacitance Symbol RINPW RLVF RLAO CLVF CLAO VOVF Output Voltage Level VOAO VOFVF Offset Voltage Comparator Input Voltage Range Analog Switch "ON" Resistance VOFAO GDB RSW Condition PWI, AIN3+/-, AIN4+/-, REF1, REF2, AVIN VFRO, SAO AOUT+, AOUT-, GSX3, GSX4 VFRO, SAO AOUT+, AOUT-, GSX3, GSX4 VFRO, SAO RL = 20 kW AOUT+, RL = 1.2 kW AOUT-, ZL = 350 kW GSX3, + 120 nF(See Fig.1) GSX4 VFRO, SAO AOUT+, AOUT- (Gain = 0 dB, Power amp only) GSX3, GSX4 AVIN, REF1, REF2 IO1-IO2, IO3-IO4, IO5-IO6, IO7-IO8, IO9-IO10, IO10-IO11, IO12-VDD, IO13-VDD, IO14-VDD 100 -- 400 W Min. 10 20 1.2 -- -- -- -- -- -100 -20 0.85 Typ. -- -- -- -- -- -- -- -- -- -- -- Max. -- -- -- 100 100 1.30 (*1) 1.30 (*1) 1.30 (*1) 100 20 VDD-0.75 Unit MW kW kW pF pF VPP VPP VPP mV mV --
*1 -7.7 dBm (600 W) = 0 dBm0, + 3.17 dBm0 = 1.30 VPP (m-law Selected)
12/25
Semiconductor AC Chracteristics
MSM7575
(VDD = 2.7 V to 3.6 V, Ta = -25C to +70C) Condition Parameter Symbol LOSS T1 Transmit Frequency Response LOSS T3 LOSS T4 LOSS T5 LOSS T6 LOSS R1 Receive Frequency Responce LOSS R2 LOSS R3 LOSS R4 LOSS R5 SD T1 Transmit Signal to Distortion Ratio SD T2 SD T3 SD T4 SD T5 SD R1 Receive Signal to Distortion Ratio SD R2 SD R3 SD R4 SD R5 GT T1 Transmit Gain Tracking GT T2 GT T3 GT T4 GT T5 GT R1 Receive Gain Tracking GT R2 GT R3 GT R4 GT R5 NIDLT Idle Channel Noise NIDLR AVT 1020 AVR 0 VFRO 0.285 -- -- -- 1020 1020 1020 1020 Freq. (Hz) 0 to 60 1020 3300 3400 3968.75 0 to 3000 1020 3300 3400 3968.75 3 0 -30 -40 -45 3 0 -30 -40 -45 3 -10 -40 -50 -55 3 -10 -40 -50 -55 AIN = SG (*2) (*2) (*3) GSX2 -- -0.2 -0.5 -1.2 -- -- 0.285 -- -0.2 -0.5 -1.2 -0.2 (*2) (*2) 0 -- -0.15 0 13 35 35 35 28 23 35 35 35 28 23 -0.2 LOSS T2 300 to 3000 0 -- Level (dBm0)
Others
Min. 25 -0.15 -0.15 0 13 -0.15
Typ. -- -- Reference -- -- -- -- Reference -- -- -- -- -- -- -- -- -- -- -- -- -- -- Reference -- -- -- -- Reference -- -- -- -- -- 0.320 (*4) 0.320 (*4)
Max. -- 0.20 0.80 0.80 -- 0.20 0.80 0.80 -- -- -- -- -- -- -- -- -- -- -- 0.2 0.2 0.5 1.2 0.2 0.2 0.5 1.2 -68
Unit dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB
(-75.7) dBmOp -72 (-79.7) 0.359 0.359 Vrms Vrms (dBmp)
Absolute Signal Amplitude
13/25
Semiconductor AC Characteristics (Continued)
MSM7575
(VDD = 2.7 V to 3.6 V, Ta = -25C to +70C) Condition Parameter Power Supply Noise Rejection Ratio Symbol PSRRT Freq. (Hz) Noise Freq. PSRRR : 0 to 50 kHz tSDX tXD1 -- tXD2 tXD3 tM1 tM2 tM3 tM4 Serial Port Digital Input/Output Setting Time tM5 tM6 tM7 tM8 tM9 tM10 tM11 Shift Clock Frequency FEXCK -- -- EXCK -- CLoad = 100 pF See Fig.7 Level (dBm0) Noise Level : 50 mVPP
Others
Min. 30 30 0 0 0 0 50 50 50 50 100 50 50 0 50 50 0 --
Typ. -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Max. -- -- 200 *5(100) 200 *5(100) 200 *5(100) 200 *5(100) -- -- -- -- -- -- -- 50 -- -- 50 10
Unit dB dB ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns MHz
--
Digital Input/Output Setting Time
1LSTTL + 100 pF pull-up: 500 W
See Fig.4
*2 Use the P-message weighted filter *3 PCMRI input code "11010101"(A-law) "11111111"(m-law) *4 0.320 Vrms = 0 dBm0 = -7.7 dBm *5 Value in ( ) is for CLoad = 10 pF Pull-up 20 kW Note: All ADPCM coder and decoder characteristics comply with ITU-T Recommendation G.721.
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Semiconductor AC Characteristics (DTMF and Other Tones)
MSM7575
(VDD = 2.7 V to 3.6 V, Ta = -25C to +70C) Parameter Frequency Difference Symbol DFT1 DFT2 VTL Original (reference) Tone Signal Level *6 VTH VRL VRH Relative Level of DTMF Tones RDTMF Transmit Tones DTMF Tones Other Tones DTMF (Low) DTMF (High) and Other Tones DTMF (Low) Receive Tones DTMF (High) and Other Tones VTH/VTL, VRH/VRL Condition Min. -7 -7 -18 -16 -4 -2 +1 Typ. -- -- -16 -14 -2 0 +2 Max. +7 +7 -14 -12 0 +2 +3 Unit Hz Hz dBm0 dBm0 dBm0 dBm0 dBm0
*6 Not contain the setting value of the programmable gain AC Characteristics (Programmable Gain Stages)
(VDD = 2.7 V to 3.6 V, Ta = -25C to +70C) Parameter Gain Accuracy Symbol DG Condition All gain stages, to programmed value Min. -1 Typ. 0 Max. +1 Unit dB
AC Characteristics (VOX Function)
(VDD = 2.7 V to 3.6 V, Ta = -25C to +70C) Parameter Transmit VOX Detect Time
(Voice signal ON/OFF detect time)
Symbol tVXON tVXOF DVX OFF AE ON ON AE OFF
Condition VOXO, Fig.4
Min. --
Typ. 5
Max. --
Unit ms ms dB
150/310 160/320 170/330 -2.5 0 +2.5
Transmit VOX Detect Level Accuracy (Threshold Level)
To the setting of detect level by CR6-B6, B5.
15/25
Semiconductor
MSM7575
TIMING DIAGRAM
Transmit Side PCM Data Interface
0 tXS XSYNC PCMSO tSDX 1 tSX tXD1 MSB 2 tWS tXD2 3 4 5 6 7 8 9 10
BCLK
tXD3 LSB
Receive Side PCM Data Interface
BCLK RSYNC tDS PCMRI MSB 0 tRS 1 tSR 2 tWS tDH LSB 3 4 5 6 7 8 9 10
Figure 6 PCM Data Interface
16/25
Semiconductor Serial Port Data Transfer for MCU Interface
DEN tM2 EXCK tM1 1 tM3 2 3 tM6 4 tM7 tM5 5 6 11 12 tM9
MSM7575
tM10
tM4 W/R A2
DIN
A1
A0
B7 tM8
B1
B0 tM11
DOUT
B7
B1
B0
Figure 7 MCU Interface
17/25
Semiconductor
MSM7575
FUNCTIONAL DESCRIPTION
Control Registers (1) CR0 (Basic operating mode)
B7 CR0 Initial Value A/m SEL 0 B6 MCK SEL 0 B5 PDN ALL 0 B4 PDN TX 0 B3 PDN RX 0 B2 -- 0 B1 LNR 0 B0 PDN SAO/AOUT 0
Note) "Initial": Reset state by PDN/RESET B7 ...PCM Companding law select: 0/-law, 1/A-law B6 ...Master clock frequency select: 0/9.600 MHz, 1/19.200 MHz B5 ...Power down (whole system): 0/Power on, 1/Power down When using this data for power down control, pin PDN/RESET should be set at "H"level. The control registers are not reset by this signal. B4 ...Power down (Transmit only): 0/Power on, 1/Power down B3 ...Power down (Receive only including the op-amps of GSX3, GSX4 and comparator): 0/ Power on, 1/Power down B2 ...Not used B1 ...PCM interface linear code select: 0/Companding law selected by CR0-B7 1/14-bit Linear code (2's complement) in spite of the value of CR0-B7 B0 ...Power Down for Sounder output amps: (SAO), or Receiver output amp (AOUT, VFRO ): When this data is set to digital "1", the circut which is not selected by CR4-B5 are at the power down state. When this data is set to digital "0", sounder amplifiers and receiver amplifiers are in the power-on state.
18/25
Semiconductor (2) CR1
B7 CR1 Initial Value TOUT3 -CONT 0 B6 TOUT2 -CONT 0 B5 TOUT1 -CONT 0 B4 -- 0 B3 -- 0 B2 -- 0 B1 -- 0
MSM7575
B0 RX PAD 0
B7 ... TOUT3 control bit : 0/TOUT3 = "0", 1/Enable TOUT3 B6 ... TOUT2 control bit : 0/TOUT2 = "0", 1/Enable TOUT2 B5 ... TOUT1 control bit : 0/TOUT1 = "0", 1/Enable TOUT1 B4 ... Not used B3 ... Not used B2 ... Not used B1 ... Not used B0 ... Receive side PAD : 1/inserted,12 dB loss 0/no PAD
19/25
Semiconductor
MSM7575
(3)CR2 (PCM CODEC operational mode setting and transmit/receive gain adjustment)
B7 CR2 Initial Value 0 B6 0 B5 1 B4 1 B3 0 B2 0 B1 1 B0 1 TX ON/OFF TX GAIN2 TX GAIN1 TX GAIN0 RX ON/OFF RX GAIN2 RX GAIN1 RX GAIN0
B7 ... PCM Coder disable : 0/Enable, 1/Disable (transmit PCM idle pattern) B6, B5, B4 ... Transmit gain adjustment, refer to Table-2. B3 ... PCM Decoder disable : 0/Enable, 1/Disable (receive PCM idle pattern) B2, B1, B0 ... Receive gain setting, refer to Table-2. Table-2 Transmit/Receive Gain Setting table
B6 0 0 0 0 1 1 1 1 B5 0 0 1 1 0 0 1 1 B4 0 1 0 1 0 1 0 1 Transmit Gain -6 dB -4 dB -2 dB 0 dB +2 dB +4 dB +6 dB +8 dB B2 0 0 0 0 1 1 1 1 B1 0 0 1 1 0 0 1 1 B0 0 1 0 1 0 1 0 1 Receive Gain -6 dB -4 dB -2 dB 0 dB +2 dB +4 dB +6 dB +8 dB
This programmable gain table should be assigned, not only for transmit/receive voice signal, but also for the transmitted DTMF and other tones. The transmission of these tone signals are enabled, by the CR4-B6 data described later, The original (reference) signal amplitude of these tones are analogically defined as follows. DTMF low-group-tones .................................... -16 dBm0/Tone DTMF high-group-tones and others............... -14 dBm0/Tone For example, when selecting +8 dB (B6, B5, B4) = (1,1,1) as a transmit gain, each tone signal amplitude with analogical expression on the pin PCMSO becomes as follows . DTMF low-group tones .................................... -8 dBm0 DTMF high-group tones and other tones ...... -6 dBm0 Gain setting of side tone (path to receive side from transmit side) and receive side tone is performed by register CR3.
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Semiconductor (4) CR3 (Side tone and other tone generator gain setting)
B7 CR3 Initial Value GAIN2 0 B6 GAIN1 0 B5 GAIN0 0 B4 TONE ON/OFF 0 B3 TONE GAIN3 0 B2 TONE GAIN2 0 B1 TONE GAIN1 0
MSM7575
B0 TONE GAIN0 0
Side. Tone Side. Tone Side. Tone
B7, B6, B5 ... Side tone path gain setting, refer to Table-3. B4 ... Tone generator enable : 0/Disable, 1/Enable B3, B2, B1, B0 ... Tone generator gain adjustment for receive side, refer to Table-4 Table-3 Side Tone Gain Setting Table
B7 0 0 0 0 1 1 1 1 B6 0 0 1 1 0 0 1 1 B5 0 1 0 1 0 1 0 1 Side Tone Path Gain OFF -21 dB -19 dB -17 dB -15 dB -13 dB -11 dB -9 dB
Table-4 Receive Tone Generator Gain Setting Table
B3 0 0 0 0 0 0 0 0 B2 0 0 0 0 1 1 1 1 B1 0 0 1 1 0 0 1 1 B0 0 1 0 1 0 1 0 1 Tone Generator Gain -36 dB -34 dB -32 dB -30 dB -28 dB -26 dB -24 dB -22 dB B3 1 1 1 1 1 1 1 1 B2 0 0 0 0 1 1 1 1 B1 0 0 1 1 0 0 1 1 B0 0 1 0 1 0 1 0 1 Tone Generator Gain -20 dB -18 dB -16 dB -14 dB -12 dB -10 dB -8 dB -6 dB
The tone generator gain setting table for receive side, shown by Table-4, depends upon the following reference level. DTMF low-group tones ................................ -2 dBm0 DTMF high-group tones and others ............ 0 dBm0 For example, when selecting -6 dB (B3, B2, B1, B0) = (1, 1, 1, 1) as a tone generator gain, each DTMF tone signal amplitude on SAO or VFRO is as follows. DTMF low-group tone .................................. -8 dBm0 DTMF high-group tone or other tones ....... -6 dBm0
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Semiconductor (5) CR4 (Tone genereator operating mode and frequency setting)
B7 CR4 Initial Value DTMF/OTHERS SEL 0 B6 TONE SEND 0 B5 SAO/ VFRO 0 0 0 0 0 B4 TONE4 B3 TONE3 B2 TONE2 B1 TONE1
MSM7575
B0 TONE0 0
B7 ... DTMF or Other tones select : 0/Others, 1/DTMF B6 ... Tone transmit enable (Transmit side) : 0/Voice signal (transmit), 1/Tone transmit B5 ... Tone output pin select (Receive side) : 0/VFRO, 1/SAO B4, B3, B2, B1, B0 ... Tone frequency setting, referred to Table-5-1, -2. (a) B7 = 1 (DTMF tone) Table-5-1
B4 * * * * * * * * B3 0 0 0 0 0 0 0 0 B2 0 0 0 0 1 1 1 1 B1 0 0 1 1 0 0 1 1 B0 0 1 0 1 0 1 0 1 Frequency 697 Hz + 1209 Hz 697 Hz + 1336 Hz 697 Hz + 1477 Hz 697 Hz + 1633 Hz 770 Hz + 1209 Hz 770 Hz + 1336 Hz 770 Hz + 1477 Hz 770 Hz + 1633 Hz B4 * * * * * * * * B3 1 1 1 1 1 1 1 1 B2 0 0 0 0 1 1 1 1 B1 0 0 1 1 0 0 1 1 B0 0 1 0 1 0 1 0 1 Frequency 852 Hz + 1209 Hz 852 Hz + 1336 Hz 852 Hz + 1477 Hz 852 Hz + 1633 Hz 941 Hz + 1209 Hz 941 Hz + 1336 Hz 941 Hz + 1477 Hz 941 Hz + 1633 Hz
*Unrelated (b) B7 = 0 (Other tones) Table-5-2 Tone Generator Frequency Setting
B4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 B3 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 B2 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 B1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 B0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 Frequency 2 k/2.48 kHz, 8 Hz wamble 2 k/2.2 kHz, 8 Hz wamble 2 k/2.48 kHz, 4 Hz wamble 2 k/2.2 kHz, 4 Hz wamble 1 k/1.333 kHz, 8 Hz wamble 2.73 k/2.5 kHz, 8 Hz wamble 1.8 k/2 kHz, 8 Hz wamble 400 Hz,16 Hz wamble 400 Hz,20 Hz wamble 400 Hz 350 Hz + 440 Hz Mix 1.5kHz 1.8kHz 800 Hz 1000 Hz 1300 Hz B4 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 B3 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 B2 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 B1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 B0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 Frequency 2000 Hz 2042 Hz 2514 Hz 500 Hz 667 Hz 1333 Hz 2100 Hz -- -- -- -- -- -- -- -- --
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Semiconductor Wamble Tone Wave
MSM7575
t Repeatative waveform Tf1 Tf2
4Hz wamble... Tf1 = Tf2 = 125 ms 8Hz wamble... Tf1 = Tf2 = 62.5 ms 16Hz wamble...Tf1 = Tf2 = 31.25 ms 20Hz wamble...Tf1 = Tf2 = 25 ms
(6) CR5 (Analog switch control)
B7 CR5 Initial Value SW7_ CONT 0 B6 SW8_ CONT 0 B5 SW9_ CONT 0 B4 SW5&SW6_ CONT 0 B3 SW4_ CONT 0 B2 SW3_ CONT 0 B1 SW2_ CONT 0 B0 SW1_ CONT 0
B7 ... Control Analog switch SW7 between IO12 and VDD : 0/SW7 OFF, 1/SW7 ON B6 ... Control Analog switch SW8 between IO13 and VDD : 0/SW8 OFF, 1/SW8 ON B5 ... Control Analog switch SW9 between IO14 and VDD : 0/SW9 OFF, 1/SW9 ON B4 ... Control Analog switch SW5 between IO9 and IO10, and Analog switch SW6 between IO10 and IO11 : 0/SW5 OFF, SW6 ON, 1/SW5 ON, SW6 OFF B3 ... Control Analog switch SW4 between IO7 and IO8 : 0/SW4 OFF, 1/SW4 ON B2 ... Control Analog switch SW3 between IO5 and IO6 : 0/SW3 OFF, 1/SW3 ON B1 ... Control Analog switch SW2 between IO3 and IO4 : 0/SW2 OFF, 1/SW2 ON B0 ... Control Analog switch SW1 between IO1 and IO2 : 0/SW1 OFF, 1/SW1 ON
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Semiconductor
MSM7575
(7) CR6 (VOX function control)
B7 CR6 Initial Value VOX ON/OFF 0 B6 ON LVL1 0 B5 ON LVL0 0 B4 OFF TIME 0 0 B3 VOX IN B2 LEVEL SEL 0 B1 LVL1 0 B0 LVL0 0 RX NOISE RX NOISE RX NOISE
B7 ... VOX function enable : 0/Disable, 1/Enable B6, B5 ... Transmit signal energy detect (Transmit VOX) threshold (0, 0): -30 dBm0 (0, 1): -35 dBm0 (1, 0): -40 dBm0 (1, 1): -45 dBm0 B4 ... Hang-over time (Fig. 2, TVXOFF) : 0/160 ms, 1/320 ms B3 ... Receive VOX function setting : 0/Background noise transmit, 1/Voice signal detect When using this data for control, the pin VOXI should be set at a "L" level. B2 ... Background noise amplitude setting : 0/Automatic, 1/Programmable by B1 and B0 Automatic : The noise is set at the voice signal amplitude at the time when B3 (or VOXI) changes from "1" to digital "0". B1, B0 ... (0, 0): No noise (0, 1): -55 dBm0 (1, 0): -45 dBm0 (1, 1): -35 dBm0 (8) CR7 (Detect register, read only)
B7 CR7 Initial VOX OUT 0 B6 LVL1 0 B5 LVL0 0 * * * * * B4 -- B3 -- B2 -- B1 -- B0 -- TX NOISE TX NOISE
* For IC test
B7 ... Transmit VOX function result : 0/Absence, 1/Presence B6, B5 ... Transmit voiceless level (indicator) : (0, 0) : below -60 dBm0 Note) These outputs are valid only when VOX (0, 1) : -50 to -60 dBm0 function is enabled by CR6-B7. (1, 0) : -40 to -50 dBm0 (1, 1) : over -40 dBm0 B4 ... Not used B3 ... Not used B2 ... Not used B1 ... Not used B0 ... Not used
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Semiconductor
MSM7575
PACKAGE DIMENSIONS
(Unit : mm)
QFP64-P-1414-0.80-BK
Mirror finish
Package material Lead frame material Pin treatment Solder plate thickness Package weight (g)
Epoxy resin 42 alloy Solder plating 5 mm or more 0.87 TYP.
Notes for Mounting the Surface Mount Type Package The SOP, QFP, TSOP, SOJ, QFJ (PLCC), SHP and BGA are surface mount type packages, which are very susceptible to heat in reflow mounting and humidity absorbed in storage. Therefore, before you perform reflow mounting, contact Oki's responsible sales person for the product name, package name, pin number, package code and desired mounting conditions (reflow method, temperature and times).
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E2Y0002-29-62
NOTICE
1. The information contained herein can change without notice owing to product and/or technical improvements. Before using the product, please make sure that the information being referred to is up-to-date. The outline of action and examples for application circuits described herein have been chosen as an explanation for the standard action and performance of the product. When planning to use the product, please ensure that the external conditions are reflected in the actual circuit, assembly, and program designs. When designing your product, please use our product below the specified maximum ratings and within the specified operating ranges including, but not limited to, operating voltage, power dissipation, and operating temperature. Oki assumes no responsibility or liability whatsoever for any failure or unusual or unexpected operation resulting from misuse, neglect, improper installation, repair, alteration or accident, improper handling, or unusual physical or electrical stress including, but not limited to, exposure to parameters beyond the specified maximum ratings or operation outside the specified operating range. Neither indemnity against nor license of a third party's industrial and intellectual property right, etc. is granted by us in connection with the use of the product and/or the information and drawings contained herein. No responsibility is assumed by us for any infringement of a third party's right which may result from the use thereof. The products listed in this document are intended for use in general electronics equipment for commercial applications (e.g., office automation, communication equipment, measurement equipment, consumer electronics, etc.). These products are not authorized for use in any system or application that requires special or enhanced quality and reliability characteristics nor in any system or application where the failure of such system or application may result in the loss or damage of property, or death or injury to humans. Such applications include, but are not limited to, traffic and automotive equipment, safety devices, aerospace equipment, nuclear power control, medical equipment, and life-support systems. Certain products in this document may need government approval before they can be exported to particular countries. The purchaser assumes the responsibility of determining the legality of export of these products and will take appropriate and necessary steps at their own expense for these. No part of the contents contained herein may be reprinted or reproduced without our prior permission. MS-DOS is a registered trademark of Microsoft Corporation.
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Copyright 1999 Oki Electric Industry Co., Ltd.
Printed in Japan

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