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ML7202-001 Datasheet Preview

ML7202-001 Datasheet

2-Channel Echo Canceler

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ML7202-001
2-Channel Echo Canceler with Multifunction ADPCM Transcoder
FEDL7202-001-01
Issue Date: Sep. 08, 2004
GENERAL DESCRIPTION
The ML7202-001 is an LSI supporting 2-channel transmit/receive. Each channel of transmit/receive has a built-in
line echo canceler and full-duplex ADPCM transcoder. The ML7202-001, which performs functions such as the
DTMF tone and single tone generation, and tone detection, transmit/receive data mute, gain control, and VOX, is
ideally suited to applications such as basestations of ADPCM-based cordless telephone systems like
Asian-prevailing PHS (Personal Handyphone System).
FEATURES
Single 3.3 V power supply (DVDD1, 2, AVDD: 3.0 to 3.6 V)
ADPCM: ITU-T Recommendation G.726 (32 kbps)
PCM interface code format: ITU-T Recommendation G.711 (64 kbps), -law or A-law selectable
Built-in echo canceler
Echo attenuation: 30 dB typ.white noise
Cancelable echo delay time: 64ms max
Serial ADPCM and PCM transmission rate: 64 to 2048 kbps
Digital interface synchronization mode: Long Frame Sync
Time slot assignment
-law/A-law setting: Supports 32 slots (BCLK setting: 2.048 MHz external input)
Transmit/receive mute function and transmit/receive programmable gain setting
Built-in DTMF tone and single tone generators
Single tone detector
2100 Hz (default) 
Built-in VOX functions
Transmit side : Voice/silence detection
Receive side : Background noise generation during silence
Parallel microcontroller interface
Master clock frequency: 19.2 MHz
Hardware and software power-down mode
Operating temperature range: –40°C to +85°C
Package:
64-pin plastic TQFP (TQFP64-P-1010-0.50-K) (ML7202-001TB)
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ML7202-001 Datasheet Preview

ML7202-001 Datasheet

2-Channel Echo Canceler

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BLOCK DIAGRAM
FEDL7202-001-01
ML7202-001
PCMLNO1
PCMLNI1
SYNCL
BCLKL
PCMLNI2
PCMLNO2
ATTtgrx1
Tone Gen1(DTMF etc.)
ATTtgtx1
RoutL1
Echo Canceller (channel 1)
GainL1 ATTrL1
RinL1
Power Calc
Howling Detector
Double Talk Det.
Line Adaptive
FIR Filter (LAFF)
SinL1
LPADL1
ATTsL1
Center
Clip
SoutL1
GPADL1
SinL2
Echo Canceller (channel 2)
SoutL2
LPADL2
ATTsL2
Center
Clip
GPADL2
Line Adaptive
FIR Filter (LAFF)
RoutL2
Power Calc
Howling Detector
Double Talk Det
RinL2
GainL2 ATTrL2
ATTtgrx2
Tone Gen2(DTMF etc.)
ATTtgtx2
P/S & S/P
I/O Controller
Clock Generator
Noise Gen1
Voice Det.
Tone Det.
Tone Det.
ADPCM Transcoder
(channel 1)
ADPCM
Decoder1
ADPCM
Coder1
AVDD
AGND
DVDD1-2
DGND1-2
VOUT1-2
VBG
VOXI1
VOXO1
IR1
IS1
Tone Det.
Tone Det.
Voice Det.
Noise Gen2
ADPCM Transcoder
(channel 2)
ADPCM
Coder2
ADPCM
Decoder2
I/O Controller
P/S & S/P
VREF
Test I/F
SYNCA
BCLKA
IS2
IR2
VOXO2
VOXI2
MTYPE
CS
RD
WR
5 A4-0
8 D7-0
INT
* Transmit side : Direction from the PCMLNI1-pin (or the PCMLNI2-pin) toward the IS1-pin (or the IS2-pin)
Receive side : Direction from the IR1-pin (or the IR2-pin) toward the PCMLNO1-pin (or the PCMLNO2-pin)
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Part Number ML7202-001
Description 2-Channel Echo Canceler
Maker LAPIS
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