CML Microcircuits
COMMUNICA
TION SEMICONDUCTORS
D/8341/7 January 2014
CMX8341
Digital PMR (dPMR)
Baseband Processor
Advance Information
DATASHEET
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
CMX8341 dPMR Baseband Processor
Modulator
Discriminator
PA Ramp
External Sub-audio
Digital PMR Air Interface:
RF
Interface
Physical, Data Link and
Control Layer Support
Audio
Interface
External Ref. Clock
RF
Section
PLL
Clocks
GPIO
Data
Modem
Auxiliary
Operations
Power Supplies
Vocoder
System
Control
C-BUS
DACs
µC
Interface
Analogue PMR:
Core Functionality
Serial
Memory
(Optional)
Mux
ADC
2014 CML Microsystems Plc
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