Z53C80 查看數據表（PDF） - Zilog
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Z53C80 Datasheet PDF : 40 Pages
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ZILOG
AC CHARACTERISTICS
DMA Write (Block Mode) Target Send Table
Name
Description
1
DRQ False from /DACK True
2
Write Enable Width [1]
3
Write Recovery Time
4
Data Setup to End of Write Enable [1]
5
Data Hold Time from End of /IOW
6
Width of /EOP Pulse [2]
7
/ACK True to /REQ False
8
/REQ from End of /IOW (/ACK False)
9
/REQ from End of ACK (/IOW False)
10
/ACK True to READY True
11
READY True to /IOW False
12
/IOW False to READY False
13
DATA Hold from /ACK True
14
Data Setup to /REQ True
Notes:
[1] Read enable is the occurrence of both /IOR and /DACK.
[2] /EOP, /IOW, and /DACK must be concurrently true for at least T6 for
proper recognition of the /EOP pulse.
Z53C80 SCSI
Min
Max
Units
60
ns
50
ns
120
ns
50
ns
25
ns
50
ns
80
ns
90
ns
100
ns
70
ns
70
ns
70
ns
40
ns
55
ns
PS97SCC0200
35
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