LSI 53C875A Manual De Usuario
SCSI Timing Diagrams
6-55
Figure 6.36 Target Asynchronous Receive
Table 6.40
Target Asynchronous Receive
Symbol
Parameter
Min
Max
Unit
t
1
SREQ/ deasserted from SACK/ asserted
5
–
ns
t
2
SREQ/ asserted from SACK/ deasserted
5
–
ns
t
3
Data setup to SACK/ asserted
0
–
ns
t
4
Data hold from SREQ/ deasserted
0
–
ns
Table 6.41
SCSI-1 Transfers (5.0 Mbytes)
Symbol
Parameter
Min
Max
Unit
t
1
Send SREQ/ or SACK/ assertion pulse width
80
–
ns
t
2
Send SREQ/ or SACK/ deassertion pulse width
80
–
ns
t
1
Receive SREQ/ or SACK/ assertion pulse width
70
–
ns
t
2
Receive SREQ/ or SACK/ deassertion pulse width
70
–
ns
t
3
Send data setup to SREQ/ or SACK/ asserted
24
–
ns
t
4
Send data hold from SREQ/ or SACK/ asserted
54
–
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
SREQ/
SACK/
SD[15:0]/,
SDP[1:0]/
n
n + 1
t
2
t
1
t
3
t
4
Valid n
Valid n + 1
n + 1
n