Z5380 Datasheet, PDF (27/37 Pages) Zilog, Inc. – SMALL COMPUTER SYSTEM INTERFACE (SCSI)

ZILOG
AC CHARACTERISTICS
DMA Read (Non-Block Mode) Target Receive Cycle Table
No Description
Min
1
DRQ Low from /DACK Low
130
2
/DACK High to DRQ High
30
3
/DACK Hold Time from End of /IOR
0
4
Data Access Time from Read Enable ^[1]
115
5
Data Hold Time from End of /IOR
20
6
Width of /EOP Pulse ^[2]
100
7
/ACK Low to DRQ High
15
8
/DACK High to /REQ Low (/ACK High)
30
9
/ACK Low to /REQ High
25
10 /ACK High to /REQ Low (/DACK High)
20
11 Data Setup Time to /ACK
20
12 Data Hold Time from /ACK
50
Notes:
[1] Read Enable is the occurrence of /IOR and /DACK.
[2] /EOP, /IOR, 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
110
ns
150
ns
125
ns
150
ns
ns
ns
PS97SCC0100
PS009101-0201
27