System-on-chip processor CMX885

systemindustrialvideo

The CMX885 is a half-duplex, audio, signalling and data processing IC for use in Marine VHF radio systems. Complete voice-band processing, filtering, pre- or de-emphasis and frequency inversion scrambling. Signal routing and filtering is included to assist host µC based signal encoding/decoding applications. A 1200bps Digital Selcall (DSC)/Automatic Transmitter Identification System (ATIS) modem with protocol support and National Oceanic and Atmospheric Administration (NOAA) National Weather Radio (NWR) decoding are supported. A DTMF encoder/decoder, a full complement of auxiliary ADCs and DACs and dual synthesised clock outputs are included. The device also has flexible powersaving modes and is available in 48-pin VQFN and LQFP packages. Concurrent Audio, Signalling and Data Operations Complete Audio Band Processing: – Selectable Audio Processing Order – Pre and De-emphasis – Selectable 2.55/3.0 kHz Filtering – Limiter Programmable Voice-band Scrambler In-band Signalling: – DTMF – NOAA NWR DTMF and Audio Tone Encoder Dual Auxiliary ADC with 4 Multiplexed Inputs C-BUS Serial Interface to Host µController Four x Auxiliary DACs Dual Programmable System Clock Outputs Tx Outputs for Single or Two-point Modulation Three x Analogue Inputs Digital Gain Adjustment DSC/ATIS Modem for Marine Applications Default 3.6864MHz Xtal/Clock Low Power Operation with Flexible Powersave Modes Compact VQFN and LQFP Packages Applications Marine VHF Radio and/or Marine Safety Systems Power Supply Requirement 3.3V power supply