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Initiator transfers one byte for each REQ pulse received.
1. Drive asserts the REQ signal.
2. After receiving the leading edge of the REQ signal, initiator drives the
DB (0-15, P, & P1) signals to their desired values. The DB (0-15, P, &
P1) signals are held valid for at least one deskew delay plus one cable
skew delay plus one hold time delay after the assertion of the ACK
signal.
3. Initiator delays at least one deskew delay plus a cable skew delay.
4. Initiator asserts the ACK signal for a minimum of one assertion period.
5. Initiator can negate the ACK signal and change or release the DB (0-
15, P, & P1) signals.
6. Drive reads the DB (0-15, P, & P1) signals within one hold time of the
transition of the ACK signal to true.
7. The drive waits at least the greater of these periods before again
asserting the REQ signal:
a) A transfer period from the last transition of the REQ signal to
true, or
b) A negation period from the last transition of the REQ signal to
false.
8. The initiator waits at least the greater of the following periods before
again asserting the ACK signal:
a) A transfer period from the last transition of the ACK signal to
true, or
b) A negation period from the last transition of the ACK signal to
false.