CML - Wireless Data - CMX7143

The CMX7143 is a unique, highly-flexible single IC product offering wide-ranging wireless data operations in one hardware package.

This unique way of operating means that you can produce an individual end-product platform operable to (currently) three different schemes. A saving in time, cost and materials.

Built on CML’s proprietary FirmASIC technology, this IC can be configured by a Function Image (FI) file to one of three individual functions:

  • GMSK/GFSK Packet Data Modem
  • 4FSK Packet Data Modem
  • FFSK/MSK Modem

Operation, in the host equipment, to alternative data schemes is achieved literally at the ‘press of a button’.
FirmASIC IC function and configuration is achieved by the loading of a compact Function Image file at start-up or when a change of data scheme is required.

Function Image files, which are downloadable from the CML website, can be easily 'swopped' in the field by the host µC to allow the system to operate to an entirely different (data) scheme.

The Function Image (FI)
This device utilises CML’s proprietary FirmASIC component technology.

On-chip sub-systems are configured by a Function Image: this is a 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 an external EEPROM or from a host µController over the built-in C-BUS serial command/data interface.

The following PCB-based Evaluation Kits are available for use with this IC:

PE0402 Evaluation Kit for CMX704x and CMX714x ICs
PE0003 Evaluation Kit Interface Card

Block Diagram


  • 7143FI-1.x:

    • GMSK/GFSK Packet Data Modem
    • Bit Rates: 4k to 20k bps (2k to 20k sym/s)
    • Selectabe BTs: 0.5, 0.3, 0.25, 0.27
  • 7143FI-2.x:
    • 4FSK Packet Data Modem
    • Bit Rates: 4k to 20k bps (2k to 20k sym/s)
  • 7143FI-3.x:
    • FFSK/MSK Packet Data Modem
    • 1200 and 2400 baud Data-rates

Common to all products . .

  • Built on FirmASIC® Technology
  • Half-duplex Operation
  • Automatic Frame Sync. Detection
  • Automatic Preamble and Frame Sync. Insertion
  • Formatted and Raw Data Modes
  • Flexible Bit-rates
  • Two Auxiliary ADCs
  • Four Auxiliary DACs
  • Three Analogue Inputs
  • Carrier Sense
  • Automatic (RAMDAC) Control of Tx Hardware
  • Flexible Tx Interfaces:
    • I/Q Modulation
    • Two-point Modulation
  • C-BUS Serial Command/Data Interface


  • Wireless Data Modems
  • M2M Applications
  • Point-to-Point Telemetry
  • Traffic Control and Vehicle Location Systems

Supply Requirement:

  • 3.0 to 3.6 V Power Supply