器件名称: CMX838
功能描述: FRS/PMR446/GMRS Family Radio Processor
文件大小: 918.29KB 共71页
简 介:CML Microcircuits
COMMUNICA TION SEMICONDUCTORS
D/838/8 September 2003
CMX838
FRS/PMR446/GMRS Family Radio Processor
Provisional Issue
Features and Applications
Advanced one-of-any CTCSS subaudio 50 tone processor
Fast decode time IRQ on any / all valid tones Fast scan, group calling, auto response tone select and Tone Cloning support Supply Independent output level
Audio processing
Mic amplifier Pre/De-emphasis Limiter with Supply Independent output level Post limiter filtering Mic, Rx, and Tx digital gain controls Single and Dual Tx outputs
RF Synthesizer
FRS, PMR446 and GMRS RF channels Configurable charge pump
Signal source and external function switches Low power, 3V to 5V supply
Powersave and sleep modes
Audio call tone generator
AUX I/O MICOUT MICIN RXIN GENERAL PURPOSE TIMER AND TONE GENERATOR AUDIO PROCESSOR
Serial control interface
RXOUT
PROGRAMMABLE SUBAUDIO PROCESSOR
MODULATION OUTPUT SELECT AND LEVEL CONTROL
TXMOD1 TXMOD2 IRQ RPLY DATA
TIMING GENERATION
C-BUS
CMD DATA SERIAL CLOCK CS
REFIN -RFIN +RFIN ISET CPOUT SVDD SVSS
S A
XTAL XTAL XTAL
RF SYNTHESIZER BIAS
VDD VBIAS VSS
The highly integrated CMX838 Family Radio Processor includes subaudio, audio, and synthesizer functions to serve as the core engine for low cost, high performance FRS, PMR446, and GMRS radio designs. Its flexibility supports both simple and advanced multi-channel radios without cost penalties. Integrated Tx voltage reference and baseband clock generati……
