CMX7262L9 CML Microcircuits

TWELP Vocoder CMX7262 CML Microcircuits TWELP Vocoder COMMUNICATION SEMICONDUCTORS D/7262 FI-1.x/4 August 2013 DATASHEET Advance Information 7262 FI-1.x Professional Radio Vocoder Auxiliary functions Features o GPIOs High-performance, low bit rate vocoder using o Two differential audio outputs TWELP (Tri-wave Excited Linear Prediction) o Single-ended speaker output technology o Analogue input/output gain adjustment Crystal clear voice and excellent performance o Analogue input multiplexer in real-life radio operation o Analogue output multiplexer Excellent performance providing natural- Low power 3.3V operation with powersave sounding speech and high quality non-voiced functions signals such as emergency services sirens Small 64-pin VQFN package Half-duplex operation FEC built in to each vocoder frame Applications Noise Reduction Half duplex digital radio systems Integral voiceband audio codec (No external Personal area network voice links DSP or codecs required) Secure digital voice communications C-BUS host serial interface Secure door access o Streaming input and output registers to Wireless PBX streamline transfers and relax host service VoIP applications latency Digital Software Defined Radio (SDR) Signal routing: o Choice of input sources C-BUS transfer from host, analogue audio input o Choice of output sources C-BUS transfer to host, analogue audio output GPIOs Digital Analogue In ADC FIFO Filters Host C C-BUS Digital Configuration Analogue Out DAC Filters Function Image CMX7262 3.3V 3.3V Professional Radio Vocoder - TWELP 2013 CML Microsystems Plc RegistersTWELP Vocoder CMX7262 1 Brief Description The CMX7262 TWELP Vocoder IC is a device supporting a Tri-Wave Excited Linear Prediction (TWELP) vocoder functionality in a single chip. The CMX7262 is capable of encoding analogue voice into TWELP- encoded frames. It is capable of decoding TWELP-encoded frames back to analogue voice. Input and output signals may be passed through the C-BUS interface, or the on-chip analogue-to-digital and digital-to-analogue converters (ADC/DAC). The CMX7262 is designed to be flexible. However, it interfaces directly to the CMX7141 modem and the two can used together to build a dPMR radio. 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 microcontroller 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 CMX7262 operates from a 3.3V supply and includes selectable power saving modes. It is available in a 64-VQFN (Q1) and 64-LQFP (L9) packages. 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. 2013 CML Microsystems Plc Page 2 D/7262 FI-1.x/4