Z5380 Datasheet, PDF (31/37 Pages) Zilog, Inc. – SMALL COMPUTER SYSTEM INTERFACE (SCSI)

ZILOG
AC CHARACTERISTICS
DMA Write (Block Mode) Target Send Cycle Table
No Description
Min
1
DRQ Low from /DACK Low
130
2
Write Enable Width ^[1]
100
3
Write Recovery Time
120
4
Data Setup to End of Write Enable ^[1]
50
5
Data Hold Time from End of /IOW
40
6
Width of /EOP Pulse ^[2]
100
7
/ACK Low to /REQ High
25
8
/REQ from End of /IOW (/ACK High)
40
9
/REQ from End of /ACK (/IOW High)
20
10 /ACK Low to READY High
20
11 READY High to /IOW High
70
12 /IOW High to READY Low
20
13 Data Hold from /ACK Low
40
14 Data Setup to /REQ Low
60
Notes:
[1] Write Enable is the occurrence of /IOW and /DACK.
[2] /EOP, /IOW, and /DACK must be concurrently Low for at least T6 for proper recognition of the /EOP pulse.
Z5380 SCSI
Max
Units
ns
ns
ns
ns
ns
ns
125
ns
180
ns
170
ns
140
ns
ns
140
ns
ns
ns
PS97SCC0100
31
PS009101-0201