Fujitsu 600C manual b Asynchronous transler from initiator to target

BSY

SEL

C/D,MSG

I/O

REQ

ACK

DB

Bus settle delay

deskew delay +	deskew delay +
cable skew delay	cable skew delay

(b)Asynchronous transler from initiator to target

If the I/O signal is false (transfer to the target), the target shall request information by asserting the REQ signal. The initiator shall drive the DB (7-0, P) signals to their desired values, delay at least one deskew delay plus a cable skew delay then assert the ACK signal. The initiator shall continue to drive the DB (7-0, P) signals until the REQ signal is false. When the ACK signal becomes true at the target, the target shall read the DB (7-0, P) signals then negate the REQ signal. When the REQ signal becomes false at the Initiator, the initiator may change or release the DB (7-0, P) signals and shall negate the ACK signal. The target may continue the transfer by asserting the REQ signal, as previously described.

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