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1. The drive drives the DB (0-15, P, & P1) signals to their desired values.
2. Drive delays at least one deskew delay plus a cable skew delay.
3. Drive asserts the REQ signal.
4. Initiator reads the DB (0-15, P, & P1) signals.
5. Initiator indicates its acceptance of the data by asserting the ACK signal.
6. When ACK is true at the drive, drive can change or release the DB (0-15, P,
& P1) signals.
7. Drive negates the REQ signal.
8. Initiator negates the ACK signal.
9. Drive can continue the transfer by driving the DB (0-15, P, & P1) signals
and asserting the REQ signal (Steps 1 – 3).
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1. Drive asserts the REQ signal.
2. Initiator drives the DB (0-15, P, & P1) signals to their desired values.
3. Initiator delays at least one deskew delay plus a cable skew delay.
4. Initiator asserts the ACK signal.
5. When ACK is true at the drive, drive reads the DB (0-15, P, & P1) signals.
6. Drive negates the REQ signal.
7. Initiator can change or release the DB (0-15, P, & P1) signals.
8. Initiator negates the ACK signal.
9. Drive can continue the transfer by asserting the REQ signal (Step 1).