Transcoder CMX7261 CML Microcircuits Multi-transcoder COMMUNICATION SEMICONDUCTORS D/7261 FI-1.x/9 March 2012 DATASHEET Advance Information 7261 FI-1.x Multi-transcoder Features C-BUS host serial interface Half-duplex operation o SPI-like with register addressing Full-duplex operation o Read/Write 128-byte FIFOs and data buffers Multiple codec support: to streamline transfers and relax host service o PCM (linear, -law, A-law), CVSD and latency G.729A codecs Auxiliary functions Multiple transcoding support: o Three GPIOs o PCM to CVSD and reverse o Analogue input/output gain adjustment o PCM to G.729A and reverse o Analogue input multiplexer o CVSD to G.729A and reverse o Analogue output multiplexer o PCM /A/linear to PCM /A/linear Master/Slave PCM serial interface transcoder o For external audio CODEC No external DSP or codecs required: simply Low power 3.3V operation with powersave upload Function Image (FI) functions Transcoder routing: o Choice of input sources C-BUS transfer Small 64-pin VQFN/LQFP package to host, external PCM device/codec, analogue audio input Applications o Choice of output sources C-BUS transfer Half duplex digital radio systems to host, external PCM device/codec, Full duplex digital radio systems analogue audio output Personal area network voice links Voice activity detection Privacy-type digital voice communications Wireless PBX VoIP applications Digital Software Defined Radio (SDR) GPIOs Digital Analogue In ADC FIFO Filters Host C C-BUS Digital Configuration Analogue Out DAC Filters Transcoder PCM Talk- Function External ADC / This document contains: Through / Image DAC PCM User CMX7261 3.3V 3.3V Datasheet Manual Multi-transcoder 2012 CML Microsystems Plc RegistersCMX7261 Voice Multi-transcoder CMX7261 1 Brief Description The CMX7261 Multi-transcoder IC is a device supporting multiple speech codecs in a single chip. The CMX7261 is capable of encoding analogue voice into PCM (linear, -law or A-law), CVSD or G.729A data formats. It is capable of decoding PCM, CVSD and G.729A back to analogue voice. It can also transcode data between PCM, CVSD and G.729A. Input and output signals may be passed through the C-BUS interface, the PCM port or the on-chip convertors (ADC/DAC). The device utilises CMLs proprietary FirmASIC component technology. On-chip sub-systems are configured by a Function Image data file that is uploaded during device initialisation and defines the device s function and feature set. The Function Image can be loaded automatically from a host C over the C-BUS serial interface or from an external memory device. The device s functions and features can be enhanced by subsequent Function Image releases, facilitating in-the-field upgrades. The CMX7261 operates from a 3.3V supply and includes selectable powersaving modes. It is available in a 64-VQFN (Q1) or a 64-LQFP (L9) package. Note that text shown in pale grey indicates features that will be supported in future versions of the device. This Data Sheet is the first part of a two-part document. 2012 CML Microsystems Plc Page 2 D/7261 FI-1.x/9