LSI 53C810A technical manual SCSI-1 Transfers SE, 5.0 Mbytes/s

Table 7.21 SCSI-1 Transfers (SE, 5.0 Mbytes/s)

Symbol	Parameter	Min	Max	Unit
t1	Send SREQ/ or SACK/ assertion pulse width	90	–	ns
t2	Send SREQ/ or SACK/ deassertion pulse width	90	–	ns
t1	Receive SREQ/ or SACK/ assertion pulse width	90	–	ns
t2	Receive SREQ/ or SACK/ deassertion pulse width	90	–	ns
t3	Send data setup to SREQ/ or SACK/ asserted	55	–	ns
t4	Send data hold from SREQ/ or SACK/ asserted	100	–	ns
t5	Receive data setup to SREQ/ or SACK/ asserted	0	–	ns
t6	Receive data hold from SREQ/ or SACK/ asserted	45	–	ns

Table 7.22 SCSI-2 Fast Transfers (10.0 Mbytes/s (8-Bit Transfers), 40 MHz Clock)

Symbol	Parameter	Min	Max	Unit
t1	Send SREQ/ or SACK/ assertion pulse width	35	–	ns
t2	Send SREQ/ or SACK/ deassertion pulse width	35	–	ns
t1	Receive SREQ/ or SACK/ assertion pulse width	20	–	ns
t2	Receive SREQ/ or SACK/deassertion pulse width	20	–	ns
t3	Send data setup to SREQ/ or SACK/ asserted	33	–	ns
t4	Send data hold from SREQ/ or SACK/ asserted	45	–	ns
t5	Receive data setup to SREQ/ or SACK/ asserted	0	–	ns
t6	Receive data hold from SREQ/ or SACK/ asserted	10	–	ns

SCSI Timings 7-31