Z5380 Datasheet, PDF (25/37 Pages) Zilog, Inc. – SMALL COMPUTER SYSTEM INTERFACE (SCSI)

ZILOG
AC CHARACTERISTICS
DMA Write (Non-Block Mode) Initiator Send Cycle Table
No
Description
Min
Max
1
DRQ Low from /DACK Low
130
2
/DACK High to DRQ High
30
3
Write Enable Width ^[1]
100
4
/DACK Hold from End of /IOW
0
5
Data Setup to End of Write Enable ^[1]
6
Data Hold Time from End of /IOW
7
Width of /EOP Pulse ^[2]
8
/REQ Low to /ACK Low
50
40
100
20
160
9
/REQ High to DRQ High
10
/DACK High to /ACK High
11
/IOW High to Valid SCSI Data
12
Data Hold from Write Enable ^[1]
20
110
25
150
100
15
Notes:
[1] Write Enable is the occurrence of /IOW and /DACK.
[2] /EOP, /IOW, and /DACK must be concurrently Low for at least T7 for proper recognition of the /EOP pulse.
Z5380 SCSI
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
PS97SCC0100
PS009101-0201
25