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PMR/LMR Common Platform Processors

CMX7241 and CMX7341

 

 

Features

  • Common Platform Processors
  • Analogue/Digital PMR/LMR
  • FDMA and 2-slot TDMA
  • Complete voice and data processing
  • Advanced features
    • Embedded Air Interface
    • Tx sequencer
    • Minimal host interaction
    • Autonomous CMX994A/E control
    • Audio codec for vocoder support
  • Multi-standard Function Images
    • dPMR™ + Analogue
    • DMR
  • Auxiliary features
    • 2 x ADCs (4 mux inputs)
    • 4 x DACs
    • GPIO
    • System clocks
  • General features
    • I/Q and LD Rx support 
    • Low power 3.3V operation
    • C-BUS serial interface
    • Small VQFN/LQFP packaging

Applications

  • Multi-mode Analogue/Digital radio
  • FDMA/2-slot TDMA systems
  • Portable radios
  • Mobile radios
  • Base station/repeaters

Supply Requirement:

  • 3.0 to 3.6 V

The CMX7241/CMX7341 provides a common platform to support digital and analogue FDMA and 2-slot TDMA PMR/LMR.

Based on CML’s proprietary FirmASIC® component technology, a Function Image™ (FI)  upload determines the CMX7241/CMX7341 overall function and operating characteristics.  The CMX7241 and CMX7341 provide the same system functionality and can accept the same FI but are targeted at different system implementations:

  • CMX7241 is pin compatible with the CMX7141 enabling a smooth forward evolution
  • CMX7341 has a differential I/Q Rx interface for optimum performance and direct connection to CML’s CMX994A/E DCRx ICs

The combination of CMX7341 and CMX994A/E Direct Conversion Receiver (DCRx) ICs enables a small, low cost, low power consumption multi-standard PMR/LMR system to be realised.

dPMR™ Air Interface + Analogue PMR/LMR - Function Image™ 7241/7341FI-1.x

  • Automatic digital/analogue call detection
  • dPMR™ - ETSI TS 102 490, TS 102 658 Mode 1/2/3 compliant
  • Analogue PMR/LMR - EN 300 08, EN 300 296 and  TIA-603-D compliant
  • Rx I/Q and LD support (CMX7341 includes differential inputs)
  • Direct connection to autonomous control of CMX994A/E DCRx IC
  • Codec support for RALCWI®, AMBE+2™, TWELP® Vocoders

DMR Air Interface + Analogue PMR/LMR - Function Image™  7241/7341FI-2.x

  • DMR ETSI TS 102 631 Tier 1/2/3 compliant
  • Analogue PMR/LMR - EN 300 08, EN 300 296 and  TIA-603-D compliant
  • Rx I/Q and LD support (CMX7341 includes differential inputs)
  • Direct connection to autonomous control of CMX994A/E DCRx IC
  • Codec support for AMBE+2™ vocoder

NXDN + ARIB STD-T98/102 + Analogue PMR - Function Image™  7241/7341FI-3.x

  • Auto detect of Digital/Analogue PMR
  • Analogue PMR
  • Digital PMR:
    • NXDN conventional and class D trunking
    • ARIB STD-T98 (DCR)
    • ARIB STD-T102
  • Tx sequencer

Function Image™ Roadmap includes:

  • PDT Air Interface

Other features include: two auxiliary ADCs with four selectable inputs,  four auxiliary DAC interfaces (with an optional RAMDAC on the first DAC output, to facilitate transmitter power ramping), GPIO and System Clock possibilities.

The devices have flexible powersaving modes and are available in the following packages: VQFN (CMX7241 and CMX7341) and LQFP (CMX7241 only).

994

System Diagram

Design Support Information

 
Analogue PMR voice operation A pair of scripts to realise analogue PMR voice transmission. Requires 2 x PE0403-734x Evaluation kits and 2 x PE0003 Controller kits.
 
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