C156-E097-01EN 7 - 27
3) The INIT must hold the data bus valid for at least 100 ns (Deskew Delay + Cable Skew
Delay + Hold Time) [at least 35 ns (Fast Deskew Delay + Fast Cable Skew Delay +
Fast Hold Time) FAST SCSI mode] in from the leading edge of the ACK pulse. The
INIT sends an ACK signal with a pulse width of at least 90 ns (Assertion Period) [at
least 30 ns (Fast Assertion Period) in FAST SCSI mode].
4) The TARG fetches data from the data bus within 45 ns (Hold Time) [within 10 ns (Fast
Hold Time) in FAST SCSI mode] after the leading edge of the received ACK pulse.
(3) Time monitoring of ACK response wait
When the ODD operates as a TARG, wait time for ACK response to REQ can be monitored.
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