MB86606A Datasheet, PDF (51/64 Pages) Fujitsu Component Limited. – FAST-20 SCSI Protocol Controller

MB86606A
(7) Target asynchronous input timing (target → initiator)
Parameter
Symbol
REQ set Low → ACK set Low
ACK set Low → REQ set High
REQ set High → ACK set High
Data bus defined → REQ set Low*
ACK set Low → data bus hold time
ACK set High → REQ set Low
tROLA
tAROH
tROHA
tDVLD
tDIVD
tAROL
Value
Min.
Max.
0
—
—
60
0
—
S•tCLF – 10
—
2 tCLF
—
—
40
Unit
ns
ns
ns
ns
ns
ns
* : The value of S varies with the setting condition of the asynchronous setup time register (address 17h).
Note: The output timing regulations are not applicable when the data register is EMPTY in the data phase.
REQ
t ROLA
t AROH
t RACY*
t ROHA
t AROL
ACK
DB7 to 0, P
DB15 to 8, P
t DVLD
Valid data
t DIVD
t DVLD
Valid data
* : The time (tRACY) of ACK set High → REQ set Low is defined by the longer time either (tAROH + tROHA +tAROL)
or (tDIVD + tDVLD).
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