Command Sequences
4-4
4.5
Command Sequences
A command sequence transmits controlling commands that instruct the
MSP53C391 or MSP53C392 to modify its function in some way. Available
commands are:
Set the two general-purpose output pins either high or low
(MSP53C391 only)
Place the MSP53C391 or MSP53C392 into a low-power sleep state
Adjust the output volume
Initiate a test mode in which a 4-kHz or 5-kHz square wave is generated
at the two general-purpose output pins (MSP53C391) or selected data
pins (MSP53C392)
Read the software version programmed into the MSP53C391 or
MSP53C392.
To send a command sequence, the master microprocessor transmits:
The command header
A valid command code. See Section 4.5.1,
Command Codes, for valid
command codes.
Optional parameters
Table 4–3. Command Sequence
Device
Command
Header
Command
Code
Optional
Parameters
MSP53C391
F,F,F,F,F,0,A
X,x,x,x
…
MSP53C392
FF,FF,FF,FF,FF,0A
X,x,x,x
…
Summary of Contents for MSP53C391
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