Custom Audio Electronics PLUS4 - Page 36

For models with parallel TTL interface, the communication signals are: 8 bit DATA BUS, STROBE (indicate the data validity)
and BUSY (indicate that the device is ready to receive data).
Transmission format
DATI VALIDI
DATI VALIDI
D0...D7
STROBE
BUSY
Flow diagram
ERROR
NO
NO
NO
SI
NO
SI
SI
OUT DATA
OUT STROBE=0
OUT STROBE=1
START
RETURN
TIMEOUT
> 1 sec.
TIMEOUT
> 4 sec.
BUSY=1
BUSY=0
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