Download CMX7164 Multi Mode Modem

CMX7164 Multi Mode Modem
CMX7164
RF Rx
ADCs
Aux
4 x ADC
Aux
2 x CLK
Synth
Aux
4 x DAC
Digital
Filters
Registers
Aux
4 x GPIO
FIFO
Modem
RF Tx
DACs
Digital
Filters
Configuration
Host
µC
This document contains:
Modulate
External Serial
Devices
C-BUS
C-BUS/SPI
master
FEC
CMX
ModulationSpecific Function
Image™
4
3.3V
Datasheet
User
Manual
3.3V
Multi Mode Modem
1
Brief Description
The CMX7164 Multi Mode Modem is a half-duplex device currently supporting GMSK/GFSK, QAM, and
2/4-Level FSK modes in multiple channel spacings under host control. Its *Function Image (FI) is loaded to
initialise the device and determine modulation types.
The 7164FI-1.x supports GMSK/GFSK modulation, with BT=0.5, 0.3, 0.27 or 0.25. User-programmable
filters are also possible (contact CML Technical Support for further information). The 7164FI-1.x supports
up to 20kbps. Flexible bit rates support a wide range of applications requiring a selectable bit rate and
robustness. The 7164FI-1.x supports zero IF (I/Q) and two-point modulation (Mod1/2) transmit modes,
with zero IF receive mode. The GMSK/GFSK data is over-air compatible with the FX/MX909B and the
(CMX)7143FI-1.x.
The 7164FI-2.x supports 2FSK and 4FSK modulations, root raised cosine filtered with =0.2 with optional
sinc filtering. User-programmable filters are also possible (contact CML Technical Support for further
information). The 7164FI-2.x supports up to 20kbps in a 25kHz channel. Flexible bit rates support a wide
range of applications requiring a selectable bit rate and robustness. The 7164FI-2.x supports zero IF (I/Q)
and two-point modulation (Mod1/2) transmit modes, with zero IF receive mode. The 4FSK data is over-air
compatible with the FX/MX919B and the (CMX)7143FI-2.x.
The 7164FI-4.x supports 4-, 16- and 64-QAM modulations, root raised cosine filtered with =0.2, 0.35 or a
user programmable filter (contact CML Technical Support for further information). The 7164FI-4.x supports
up to 96kbps in a 25kHz channel, with channel estimation and equalization to provide robust performance
under realistic channel conditions. The 7164FI-4.x supports zero IF (I/Q) transmit and receive. QAM data
is over-air compatible with the (CMX)7163FI-4.x.
Within this Datasheet and the accompanying User Manual any reference to FI1-x, FI-2.x or FI-4.x is
intended to refer to 7164FI1.x, 7164FI-2.x or 7164FI-4.x respectively.
Forward error correction and raw modes are available and support user-defined packet structures to
support a range of applications. For greater flexibility, in FI-4.x only, 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.
 2012 CML Microsystems Plc
Page 2
D/7164_FI-1.x/FI-2.x/FI-4.x/9