CMX7143

Multi-mode Wireless Data Modem
(FI-1.x GMSK / GFSK Packet Data Modem)
 
Features
  • Built on FirmASIC® Technology
  • Configurable by Function ImageTM
  • GMSK / GFSK Packet Data Modem (FI-1.x)
  • Multiple Modulation Modes
  • Automatic Frame Sync Detection
  • Automatic Pre-amble and Frame Sync Insertion
  • 2 x Auxiliary ADCs
  • 4 x Auxiliary DACs
  • 3 x Analogue Inputs
  • Flexible Tx Interface/s: I and Q or Two-Point modulation
  • Flexible Bit Rates
  • Raw Mode, Data Pump, Carrier Sense
  • Auxiliary System Clock Outputs
  • Low Power (3.0 to 3.6 V) Operation with Flexible Powersave Modes
  • C-BUS Serial Interface to Host Controller
Applications
  • Wireless Data Modems
  • Point-to-Point Telemetry Systems
  • M2M Applications
  • Traffic Location Systems
 
Package Styles:
  • CMX7143Q3 - 48-pin VQFN Package
  • CMX7143L4 - 48-pin LQFP Package
Supply Requirement:
3.0 to 3.6 Volts
Description
Designed for use in wireless data modems, the CMX7143 FI-1.x is a half-duplex modem with carrier sense and automatic control of transmit hardware, including RAMDAC for PA ramping. Carrier sense provides a listen-before- talk capability, automatically reverting to receive if activity on channel is detected.

In receive, automatic frame sync detection provides acquisition of the received signal with minimal host intervention.
Two different frame sync patterns may be searched for concurrently, with little need for preamble.

Other features include two Auxiliary ADC channels with four selectable inputs and up to four auxiliary DAC outputs (with an optional RAMDAC on the first DAC output, to facilitate transmitter power ramping).
The device has flexible powersaving modes and is available in both LQFP and VQFN packages.

The 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 interface. The device's functions and features can be enhanced by subsequent Function Image™ releases, facilitating in-the-field upgrades. This document refers specifically to the features provided by Function Image™ 1.x.
A separate Function Image™ 2.x is available which supports 4-FSK modulation.

Evaluation Support: The PE0401 is available for the evaluation of this product.

 

View CMX7143 (FI-1.x) Block Diagram