MB86606A Datasheet, PDF (46/64 Pages) Fujitsu Component Limited. – FAST-20 SCSI Protocol Controller

MB86606A
8. SCSI Interface
(1) Initiator asynchronous input timing (target → initiator)
Parameter
Symbol
ACK set Low → REQ set High
REQ set High → ACK set High
ACK set High → REQ set Low
Data bus valid → REQ set Low
REQ set Low → data bus hold time
REQ set Low → ACK set Low
REQ set High → ACK set Low*
tAOLR
tRAOH
tAOHR
tDTSU
tDHLD
tRAOL
tRACY
Value
Unit
Min.
Max.
0
—
ns
—
60
ns
10
—
ns
10
—
ns
20
—
ns
—
40
ns
—
3 tCLF +40
ns
* : tRACY (REQ set High → ACK set Low) is defined as either longer time of (tRAOH + tAOHR +tRAOL) or tRACY itself
Note: Time requirements in this section do not apply in the following cases;
• When data register FULL in data phase
• When last byte transferred
REQ
ACK
DB7 to 0, P
DB15 to 8, P
t DTSU
t AOLR
t RAOH
t RACY
t AOHR
t DHLD
Data
t RAOL
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