CMX7163 QAM Modem
CMX7163
1
Brief Description
The CMX7163 QAM Modem is a half-duplex device supporting multiple channel spacings under host
microcontroller (μC) control. Its *Function Image (FI) is loaded to initialise the device and determine
modulation types.
The7163 FI-4.x supports 4-, 16- and 64-QAM modulations, root raised cosine filtered with
=0.2,
0.35 or a
user programmable filter. The7163 FI-4.x supports up to 96kbps in a 25kHz channel, with channel
estimation and equalization to provide robust performance under realistic channel conditions. Flexible bit
rates support a wide range of applications requiring a selectable bit rate and robustness. The 7163FI-4.x
supports zero IF (I/Q) transmit and receive. QAM data is over-air compatible with the (CMX)7164FI-4.x.
Forward error correction and raw modes are available and support user-defined packet structures to
support a range of applications. For greater flexibility, different rate FEC modes are provided. Receive
signal quality measurement is supported, making a useful assessment of link conditions.
High performance digital IF filters may be reconfigured to support multiple channel spacings via host
command. This feature may eliminate the need to switch between multiple discrete IF filters.
An integrated analogue interface supports ‘direct connection’ to zero IF I/Q radio transceivers with few
external components; no external codecs are required.
Intelligent auxiliary ADC, DAC and GPIO subsystems perform valuable functions and minimise 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
FirmASIC
Function Image™.
The device utilises CML’s proprietary
FirmASIC
component
technology. On-chip sub-systems are configured by a Function Image™ 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 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.
The CMX7163, which is available in 64-pin VQFN and LQFP packages, operates in the range 3.0 to 3.6
volts and embodies selectable powersaving modes.
Note that text shown in
pale grey
indicates features that will be supported in future versions of the device.
This Data Sheet is the first part of a two-part document.
2014 CML Microsystems Plc
Page 2
D/7163_FI-4.x/12
CMLMICRO [ CML MICROCIRCUITS ]
