CMX7241 datasheet(21/94 Pages) CMLMICRO

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PMR Common Platform Processor

CMX7241/CMX7341

 2015 CML Microsystems Plc

Page 21

D/7241_7341_FI1.x/4

Analogue Features

5.3

The device provides full audio/voice processing to suit the requirements of EN 300 086 and TIA 603D as

well as comprehensive signalling to suit professional radio environments:



Selectable pre-emphasis and de-emphasis



Selectable audio equaliser in mic and speaker paths



Selectable voice compander



Selectable frequency inversion scrambling



Tx limiter and splatter filter



Mic AGC



Selectable sub-audio rejection filter



CTCSS and DCS generator and decoder



Support for external CTCSS/DCS generation and decoding with selectable filters



1200/2400 bps FFSK modem for MPT1327



ADSW and CCSW reporting in MPT1327 mode



16-tone Selcall generator and decoder



DTMF generator and decoder



NOAA WAT and NWR decoder



Tone generator

Auxiliary Functions

5.4



Automatic Tx sequencer simplifies host control



RAMDAC operation



TXENA and RXENA hardware signals



Two-point or I/Q modulation outputs



Hard or soft data output options



Two programmable system clock outputs



Two auxiliary ADCs with four selectable external input paths



Four auxiliary DACs, one with built-in programmable RAMDAC

Interface

5.5



Optimised C-BUS (4-wire, high-speed synchronous serial command/data bus) interface to host for

control and data transfer



Open drain IRQ to host



Auxiliary SPI/C-BUS interface to CMX6x8/CMX7262 or CMX994 with pass-through mode from

host



Auxiliary SPI-Codec bus interface for PCM speech codec to support third-party vocoders, e.g.

AMBE+2



Two GPIO pins



C-BUS (host) boot mode.

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