CML Microcircuits
COMMUNICA
TION SEMICONDUCTORS
D/7031/7041_FI-4.x/5 January 2013
CMX7031/CMX7041
AX.25 Modem
Advance Information
DATASHEET
7031/7041FI-4.x: AX.25 Modem (1200bps AFSK and 9600bps GMSK) with
Auxiliary System Clocks, ADCs and DACs for use in Amateur Packet Radio
Features
1200bps AFSK Modem
9600bps GMSK Modem
Two RF Synthesisers (CMX7031 only)
DTMF Transmit
19.2MHz or 12.4MHz Reference Clock
Available in 64-pin and 48-pin LQFP and
VQFN Packages
C-BUS Serial Interface to Host µController
Three Analogue Inputs
DAC outputs
ADC inputs
NRZI Encoding/Decoding
9600bps Data Scrambler/Descrambler
Transmit pre-emphasis
Two Auxiliary ADCs with Four Mux Inputs
Four Auxiliary DACs
Auxiliary System Clock Outputs
Tx Outputs for Single, Two-Point Modulation
Low-power (3.0V to 3.6V) Operation
Flexible Powersave Modes
3.0V to 3.6V
Modulator
Discriminator
RF
RF Synthesiser 1
RF Synthesiser 2
CMX7031 only
GPIO
System Clock 1
System Clock 2
Reference Clock
CMX7031 / CMX7041
The Two-Way Radio Processor
Built on
FirmASIC
®
Technology
C-BUS
Host
µC
This document contains:
Datasheet
User
Manual
1
Brief Description
The 7031/7041FI-4.x is a full-function, half-duplex, signalling/data processor IC. This makes it a suitable
device for both the Data Radio (M2M) and Amateur Packet Radio markets.
The Function Image™ provides a dual wireless data modem function incorporating a 1200bps AFSK
modem and a 9600bps GMSK modem. In receive, simultaneous detection of 1200bps AFSK or 9600bps
GMSK data is performed and subsequently, demodulation and decoding of the detected format.
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
serial memory 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™ 4.x.
Continued…
2013 CML Microsystems Plc
CMLMICRO [ CML MICROCIRCUITS ]
