Document
E2U0044-16-X2
¡ Semiconductor MSM7708-02
¡ Semiconductor
This version: Jan. 1998 MSM7708-02 Previous version: Nov. 1996
Serial Register Interface ADPCM CODEC for Telephone Recording
GENERAL DESCRIPTION
The MSM7708-02 is a CMOS IC developed for applying to PHS (Personal Handyphone System). This device provides a CODEC function which performs transcoding between the voice band analog signal and 32 kbps ADPCM data. It also provides a serial register interface function for telephone call recording. Provided with such functions as DTMF tone and several kinds of tone generation, transmit/ receive data mute and gain control, side-tone pass, and voice/silence detection, the MSM770802 is best suited for PHS handsets.
FEATURES
• Single 3 V power supply operation (VDD: 2.7 V to 3.6 V) • Low power consumption When system is operating: 6 mA typ. When powered down: 0.02 mA typ. (ADPCM CODEC) • ADPCM: ITU-T Recommendations G.721 (32 kbps) • Transmit/receive full duplex capability • PCM interface code format: m-law or A-law selectable • Serial ADPCM and PCM transmission rate: 64 kbps to 2,048 kbps • Transmit/receive mute function; transmit/receive programmable gain setting • Side tone generator (8-step level adjustment) • Built-in DTMF tone, ringing tone, and various tone generators • Built-in VOX function (Serial Register Interface) • Interface for a serial register: 1 Mb (MSM63V89C), 4 Mb (MSM6684), 8 Mb (MSM6685) • Interface for a serial voice ROM: 1 Mb (MSM6595A), 2 Mb (MSM6596A), 3 Mb (MSM6597A) • Maximum recording time: 32 s (1 Mb), 128 s (4 Mb), 256 s (8 Mb) • Maximum recording channels: 32 ch • Playback data transmit/receive selectable • Package: 64-pin plastic TQFP (TQFP64-P-1010-0.50-K) (Product name : MSM7708-02TS-K)
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¡ Semiconductor
MSM7708-02
BLOCK DIAGRAM
To various units SGR VREF SGT AIN1– AIN1+ GSX1 AIN2
T T
MCU Interface
EXCK DEN DIN DOUT RESET VOXO
– + – +
Voice Detect RC Filter A/D Converter BPF ATT
Compander
GSX2 AOUT+ AOUT– PWI VFRO SAO 1.2 kW
–1
– +
ADPCM Coder P/S & S/P
ADPCM Decoder
DTMF /Tone Generator
1.2 kW
ATT RC Filter D/A Converter LPF
+ +
ATT
Expander
IS PCMSI PCMSO XSYNC BCLK RSYNC PCMRI PCMRO IR DIO WE SAD SAS TAS RWCK CS1 CS2
To various units
Noise Generator
To receive unit
Power Detect
Serial Register Controller
MLV0 MLV1 MLV2 MUTE
VOXI
VDD DG AG PDN MCK
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NC 17
GSX2 18
AIN2 19
VDD 20
NC 21
MLV2 22
MLV1 23
MLV0 24
MUTE 25
NC 26
VOXI 27
VOXO 28
NC 29
DEN 30
EXCK 31
64-Pin Plastic TQFP
NC : No connect pin
NC 32
¡ Semiconductor
63 DIO 64 NC
MSM7708-02
PIN CONFIGURATION (TOP VIEW)
52 RSYNC
51 XSYNC
57 RWCK
53 BCLK
60 SAD
59 SAS
56 CS1
55 CS2
58 TAS
62 WE
49 DG
61 NC
54 NC
50 NC
AG 1 NC 2 NC 4 NC 5
48 NC 47 PCMSO 46 PCMSI 45 NC 44 IS 43 IR 42 NC 41 PCMRO 40 PCMRI 39 NC 38 MCK 37 PDN 36 RESET 35 DOUT 34 DIN 33 NC
SAO 3
VFRO 6 PWI 7
AOUT– 8 AOUT+ 9
SGR 10 NC 11 SGT 12
AIN1– 13 GSX1 14 AIN+ 15 NC 16
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MSM7708-02
PIN DESCRIPTIONS
Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 Symbol AG NC SAO NC NC VFRO PWI AOUT– AOUT+ SGR NC SGT AIN1– GSX1 AIN1+ NC NC GSX2 AIN2 VDD NC MLV2 MLV1 MLV0 MUTE NC VOXI VOXO NC DEN EXCK NC NC DIN DOUT RESET PDN MCK NC PCMRI Type I — O — — O I O O O — O I O I — — O I I — I I I I — I O — I I — — I O I I I — I Analog ground No connection Receive side sounder amplifier output No connection No connection Receive side voice output Receive side voice amplifier input Receive side voice amplifier output (–) Receive side voice amplifier output (+) Receive side analog signal ground No connection Transmit side analog signal ground Transmit side amplifier 1 inverting input Transmit side amplifier 1 output Transmit side amplifier 1 non-inverting input No connection No connection Transmit side amplifier 2 output Transmit side amplifier 2 inverting input Power supply No connection Receive side voice path mute level set Receive side voice path mute level set Receive side voice path mute level set Receive side voice path mute enable signal input No connection Receive side voice/silence detect function input Transmit side voice/silence detect function output No connection Enable signal input for control register Clock signal input for control register No connection No connection Address and data input for control Data output for control register RESET control input for control register Power down control input Master clock input No connection Receive side PCM signal input Description
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¡ Semiconductor
MSM7708-02
PIN DESCRIPTIONS (Continued)
Pin 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 Symbol PCMRO NC IR IS NC PCMSI PCMSO NC DG NC XSYNC RSYNC BCLK NC CS2 CS1 RWCK TAS SAS SAD NC WE DIO NC Type O — I O — I O — I — I I I — O O O O O O — O I/O — Receive side PCM signal output No connection Receive side ADPCM signal input Transmit side ADPCM signal output No connection Transmit side PCM si.