Figure 22. Synchronous Write Timing - Seagate MEDALIST 1080SL Product Manual

Medalist 1080sl SCSI Product Manual, August 1995
0
DB(7–0,P)–
1
0
I/O–
1
0
MSG–
1
0
C/D–
1
0
REQ–
1
0
ACK–
1
T1

Figure 22. Synchronous write timing

Description
I/O high to data bus disable
REQ– assertion period
REQ– deassertion period
Data valid to ACK– low
ACK– assertion period
ACK– deassertion period
ACK– low to data hold
ACK– period
REQ– low to ACK– low
Last ACK– pulse high to phase
change
T2 T4
T3
T7
T8
T9 T5 T6
Symbol Min
T1 —
T2 30.0 nsec
T3 30.0 nsec
T4 —
T5 30.0 nsec
T6 30.0 nsec
T7 10 nsec
T8 100 nsec
T9 10 nsec
T10 125 nsec
125
T10
Max
50 nsec
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