LSI LSI53C895A, Technical Manual

Page: 320 / 364

6-60 Electrical Specifications
Table 6.45 SCSI-1 Transfers (Differential 4.17 Mbytes)
Symbol Parameter Min Max Unit
t
1
Send SREQ/ or SACK/ assertion pulse width 96 – ns
t
2
Send SREQ/ or SACK/ deassertion pulse width 96 – ns
t
1
Receive SREQ/ or SACK/ assertion pulse width 84 – ns
t
2
Receive SREQ/ or SACK/deassertion pulse width 84 – ns
t
3
Send data setup to SREQ/ or SACK/ asserted 65 – ns
t
4
Send data hold from SREQ/ or SACK/ asserted 110 – ns
t
5
Receive data setup to SREQ/ or SACK/ asserted 0 – ns
t
6
Receive data hold from SREQ/ or SACK/ asserted 45 – ns
Table 6.46 SCSI-2 Fast Transfers 10.0 Mbytes (8-Bit Transfers) or 20.0 Mbytes (16-Bit
Transfers) 40 MHz Clock
Symbol Parameter Min Max Unit
t
1
Send SREQ/ or SACK/ assertion pulse width 30 – ns
t
2
Send SREQ/ or SACK/ deassertion pulse width 30 – ns
t
1
Receive SREQ/ or SACK/ assertion pulse width 22 – ns
t
2
Receive SREQ/ or SACK/ deassertion pulse width 22 – ns
t
3
Send data setup to SREQ/ or SACK/ asserted 24 – ns
t
4
Send data hold from SREQ/ or SACK/ asserted 34 – ns
t
5
Receive data setup to SREQ/ or SACK/ asserted 14 – ns
t
6
Receive data hold from SREQ/ or SACK/ asserted 24 – ns