Multi-Mode Wireless Data Modem
CML Microcircuits
COMMUNICATION SEMICONDUCTORS
CMX7143
Multi-Mode Wireless
Data Modem
D/7143_FI2.0/10 May 2013
DATASH...
Description
CML Microcircuits
COMMUNICATION SEMICONDUCTORS
CMX7143
Multi-Mode Wireless
Data Modem
D/7143_FI2.0/10 May 2013
DATASHEET
Provisional Issue
7143FI-2.x 4FSK Packet Data Modem
Features Multiple Modulation Types
o 7143 FI-1.0: GMSK/GFSK Modulation o 7143 FI-2.0: 4FSK Modulation - Over-air
compatibility with CMX969 for RD-LAP Tx/Rx o 7143 FI-3.0: FFSK/MSK Modulation Automatic Frame Sync Detection Automatic Preamble, Frame Sync Insertion 2 x Auxiliary ADCs and 4 x Auxiliary DACs 3 x Analogue Inputs (RSSI or Discriminator) C-BUS Serial Interface to Host µController
Flexible Bit Rates Raw Mode, Data Pump, Carrier Sense Auxiliary System Clock Outputs Tx Outputs for 2-point or I/Q Modulation Available in 48-pin LQFP and VQFN Packages Low-power 3.3V Operation Flexible Powersave Modes Formatted or Raw Data Modes Soft Decision Data Bits
Host µC
C-BUS
C-BUS registers
Status Mode/Aux
Data
Config (in Idle)
CMX7143 System Clk
Clock Synthesizers
2 aux ADCs 3 aux DACs
System
1 aux/RAM DAC Tx Trigger Input GPIO
Data Buffer
Tx Sequence Control
Modem
Tx Rx CS
MOD1 gain MOD2 gain
Rx RSSI
Configuration Parameters
Modulator Discriminator
RF
1 Brief Description
Designed for use in wireless data modems, the CMX7143 with 7143FI-2.x is a half-duplex modem with
carrier sense and automatic control of transmit hardware, including a RAMDAC for PA ramping. Carrier
sense provides a listen before talk capability, automatically reverting to receive if acti...
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