TDMA Digital Radio Processor
CMX7161
1
Brief Description
The CMX7161 FI-1.x is a half-duplex digital radio modem intended for use in two-slot TDMA systems such
as the ETSI TS 102 361 standard for Digital Mobile Radio (DMR). It uses root-raised-cosine (=0.2) 4-FSK
modulation in a 12.5kHz channel. Slot timing and synchronisation are handled automatically by the device.
An integrated analogue interface supports direct connection to a device such as CML’s CMX994 Direct
Conversion Receiver and two-point modulation transmitter with few external components; no external
codecs for the I/Q interface are required.
Intelligent auxiliary ADC, DAC and GPIO sub-systems are provided to minimise required host interaction
and host I/O resources. Two synthesised system clock generators develop clock signals for off-chip use.
The C-BUS/SPI master interface expands host C-BUS/SPI ports to control external devices.
The CMX7161 operates from a 3.3V supply and is available in 64-pin VQFN and LQFP packages.
The device uses CML’s proprietary FirmASIC component technology. On-chip sub-systems are
configured by a Function Image™ data file which is uploaded during device initialisation to define the
device's function and feature set. The Function Image™ can be loaded automatically from a host µC 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.
This Data Sheet is the first part of a two-part document. Text shown in pale grey indicates features that will
be supported in future versions.
2013 CML Microsystems Plc
Page 2
D/7161_FI-1.0/4
CMLMICRO [ CML MICROCIRCUITS ]
