Z5380 Datasheet, PDF (33/37 Pages) Zilog, Inc. – SMALL COMPUTER SYSTEM INTERFACE (SCSI)

ZILOG
AC CHARACTERISTICS
DMA Read (Block Mode) Target Receive Cycle Table
No Description
Min
1
DRQ Low from /DACK Low
130
2
/IOR Recovery Time
120
3
Data Access Time from Read Enable ^[1]
110
4
Data Hold Time from End of /IOR
20
5
Width of /EOP Pulse ^[2]
100
6
/IOR High to /REQ Low
30
7
/ACK Low to /REQ High
25
8
/ACK High to /REQ Low (/IOR High)
20
9
/ACK Low to READY High
20
10 READY High to Valid Data
50
11 /IOR High to READY Low
20
12 Data Setup Time to /ACK
20
13 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 T5 for proper recognition of the /EOP pulse.
Z5380 SCSI
Max
Units
ns
ns
ns
ns
ns
190
ns
125
ns
170
ns
140
ns
ns
140
ns
ns
ns
PS97SCC0100
PS009101-0201
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