CS9236-CL datasheet(14/34 Pages) CIRRUS

14 / 34 page

CS9236

DS214PP11

er channel to “Mode 3” operation (OMNI OFF/POLY). This

is the default mode of operation for all receiver channels. In

mode 3, the receiver channel responds to MIDI messages on

it's dedicated MIDI channel polyphonically (it can play mul-

tiple MIDI notes simultaneously).

The MONO ON message sets the receiver channel to “Mode

4” operation (OMNI OFF/MONO). In mode 4, the receiver

channel responds to MIDI messages on it's dedicated MIDI

channel monophonically (it can only play one MIDI note at a

time). In this mode, if a NOTE ON message is received on

the receiver's MIDI channel while a note is already sounding,

the receiver will quickly turn off the note which is already

sounding and play the new note.

System Realtime Messages

MIDI SYSTEM REAL TIME messages may occur at any

point in the MIDI data stream, including between the Status

and Data bytes of another MIDI message. SYSTEM REAL

TIME messages are not interpreted as a new receiver status

and do not affect the operation of Running Status. The MIDI

SYSTEM REAL TIME messages are: TIMING CLOCK

(F8H), START (FAH), CONTINUE (FBH), STOP (FCH),

ACTIVE SENSING (FEH), and SYSTEM RESET (FFH).

The CS9236 processes the ACTIVE SENSING and SYS-

TEM RESET messages only.

The TIMING CLOCK,

START, CONTINUE and STOP messages are ignored.

System Exclusive Messages

The CS9236 supports MIDI System Exclusive Messages for

enabling/disabling receipt of MIDI Channel Pressure and for

enabling/disabling of the CS9236 test tone. The System Ex-

clusive Manufacturer ID assigned for Crystal Semiconductor

Corporation is 0x00, 0x01, 0x02. The Product ID for the

CS9236 is 0x01, and the Version Number is 0x01.

The CS9236 will power-up with Channel Pressure disabled.

To enable Channel Pressure, the ENABLE RECOGNITION

OF MIDI CHANNEL PRESSURE System Exclusive mes-

sage must be sent. Channel Pressure is disabled by sending

the DISABLE RECOGNITION OF MIDI CHANNEL

PRESSURE message. Likewise, for testing purposes, a fea-

ture to enable a test tone is available. To begin playing the

test tone, the ENABLE TEST TONE System Exclusive mes-

sage must be sent. To turn the tone off, the DISABLE TEST

TONE message must be sent.

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