CMX8341 Datasheet, PDF (1/70 Pages) CML Microcircuits – RALCWI Vocoder

CML Microcircuits
COMMUNICATION SEMICONDUCTORS
CMX8341
Digital PMR (dPMR)
Baseband Processor
D/8341/7 January 2014
DATASHEET
Advance Information
8341 FI-1.x Dual-mode Analogue PMR and Digital PMR (dPMR) Baseband
Processing
Features
 Digital PMR (dPMR) Baseband Processor
o dPMR (ETSI TS 102 490) Compliant
o Air Interface Physical Layer (Layer 1)
o Air Interface Data Link layer (Layer 2)
o 4FSK Modem
 Soft-decision Decoding
 AFSD (Automatic Frame Sync Detection)
 RALCWI Vocoder
o Fully Embedded Implementation
o No Licensing or Royalty payments
o 3600bps Over Air Data Rate
(2400bps Voice plus 1200bps Robust FEC)
o 4-bit Viterbi Soft-decision Decoding
 Analogue PMR (Legacy mode)
o Full Audio Band Processing
o Sub-audio Filtering
o CTCSS and DCS
o 12.5 and 25kHz Channel Filters
 Built on FirmASIC™ Technology
o Function Image™ 8341FI-1.x Required
o Serial Memory or Host Loading
o Integration Roadmap
 Auxiliary functions
o 2 System Clock Outputs
o Tx PA Ramp DAC
o 3 DACs, 4 inputs Multiplexed to 2 ADCs
o GPIO
o Tx Enable and Rx Enable Outputs
 Half-duplex Operation
 Input from RF Discriminator
 2-point Modulation Drivers
 Audio Output with Volume Control
 Microphone Input
 Low Power Operation
 LQFP packaging
Applications
 Low Cost Digital PMR Radios
 Low Cost Digital PMR with Legacy Analogue
PMR Mode
Modulator
Discriminator
RF
Section
PA Ramp
PLL
Clocks
GPIO
DACs
Mux
ADC
CMX8341 dPMR Baseband Processor
External Sub-audio
RF
Interface
Digital PMR Air Interface:
Physical, Data Link and
Control Layer Support
Audio
Interface
Auxiliary
Operations
Data
Modem
Vocoder
Analogue PMR:
Core Functionality
System
Control
External Ref. Clock
Power Supplies
C-BUS
µC
Interface
Serial
Memory
(Optional)
 2014 CML Microsystems Plc