CS9236-CQ View Datasheet(PDF) - Cirrus Logic

Part Name

Description

MFG CO.

CS9236-CQ

Single-Chip Wavetable Music Synthesizer

Cirrus Logic 

CS9236

System Real Time Messages

ACTIVE SENSING

FEH

MIDI Transmitters which are using active sensing will send the ACTIVE SENSING message (FEH) every 300 ms maximum

(270 recommended) whenever there is no other MIDI data being transmitted. The CS9236 defaults to Active Sensing OFF

mode of operation. When the CS9236 detects an ACTIVE SENSING message, it begins operating in Active Sensing ON

mode. In Active Sensing ON mode, the CS9236 monitors the elapsed time between receipt of MIDI messages. If the elapsed

time exceeds 372 ms., then the CS9236 executes ALL SOUNDS OFF and RESET ALL CONTROLLERS on each MIDI

channel and returns to Active Sensing OFF mode.

SYSTEM RESET

FFH

The SYSTEM RESET message will cause the CS9236 to set Mode 3 (OMNI OFF/POLY) operation for each MIDI channel,

execute ALL SOUNDS OFF and RESET ALL CONTROLLERS on each MIDI channel, return to Active Sensing OFF

mode, and return to initialized power-up status.

DS214PP11

27

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