CMX885 - Consumer Microcircuits Limited

CMX885 Marine VHF Audio and Signalling Processor

The CMX885 is a half-duplex, audio, signalling and data processing IC for use in Marine VHF radio systems. Comprehensive audio processing facilities include complete audio processing, filtering, pre- or deemphasis and frequency inversion scrambling. Signal routing and filtering is included to assist host µC based signal encoding/decoding applications. 1200bp.

Features

 Concurrent Audio/Signalling/Data Operations
 Complete Audio-band Processing: o Selectable Audio Processing Order o Pre and De-emphasis o Selectable 2.55/3.0 kHz Filtering o Limiter
 DSC/ATIS Modem for Marine Applications
 Programmable Voice Scrambler
 Inband Signalling: DTMF, NOAA NWR
 C-BUS Serial Interface to Host µController
 DTMF and Audio Tone Encoder/Decoder
 Small VQFN and LQFP Packages
 Dual Auxiliary ADC, 4 Multiplexed Inputs
 4 x Auxiliary DACs
 Dual Programmable System Clock Outputs
 Tx Outputs for Single, Two-Point Modulation
 3 x Analogue Inputs (Mic or Discriminato.