CMX7261 Datasheet, PDF (1/64 Pages) CML Microcircuits – Full-duplex operation

CML Microcircuits
COMMUNICATION SEMICONDUCTORS
CMX7261
Multi-transcoder
D/7261_FI-1.x/9 March 2012
DATASHEET
Advance Information
7261 FI-1.x Multi-transcoder
Features
 Half-duplex operation
 Full-duplex operation
 Multiple codec support:
o PCM (linear, µ-law, A-law), CVSD and
G.729A codecs
 Multiple transcoding support:
o PCM to CVSD and reverse
o PCM to G.729A and reverse
o CVSD to G.729A and reverse
o PCM μ/A/linear to PCM μ/A/linear
transcoder
 No external DSP or codecs required: simply
upload Function Image™ (FI)
 Transcoder routing:
o Choice of input sources – C-BUS transfer
to host, external PCM device/codec,
analogue audio input
o Choice of output sources – C-BUS transfer
to host, external PCM device/codec,
analogue audio output
 Voice activity detection
 C-BUS host serial interface
o SPI-like with register addressing
o Read/Write 128-byte FIFOs and data buffers
to streamline transfers and relax host service
latency
 Auxiliary functions
o Three GPIOs
o Analogue input/output gain adjustment
o Analogue input multiplexer
o Analogue output multiplexer
 Master/Slave PCM serial interface
o For external audio CODEC
 Low power 3.3V operation with powersave
functions
 Small 64-pin VQFN/LQFP package
Applications
 Half duplex digital radio systems
 Full duplex digital radio systems
 Personal area network voice links
 Privacy-type digital voice communications
 Wireless PBX
 VoIP applications
 Digital Software Defined Radio (SDR)
Analogue In
Analogue Out
External ADC /
DAC
GPIOs
ADC
Digital
Filters
DAC
Digital
Filters
PCM Talk-
Through /
PCM
CMX7261
Multi-transcoder
FIFO
Configuration
Transcoder
Function
Image™
3.3V
C-BUS
Host
µC
3.3V
This document contains:
Datasheet
User
Manual
 2012 CML Microsystems Plc