31

Z5380 SCSI

PS97SCC0100

AC CHARACTERISTICS

DMA Write (Block Mode) Target Send Cycle Table

No

Description

Min

Max

Units

1

DRQ Low from /DACK Low

130

ns

2

100

ns

3

Write Recovery Time

120

ns

4

50

ns

5

Data Hold Time from End of /IOW

40

ns

6

100

ns

7

/ACK Low to /REQ High

25

125

ns

8

/REQ from End of /IOW (/ACK High)

40

180

ns

9

/REQ from End of /ACK (/IOW High)

20

170

ns

10

/ACK Low to READY High

20

140

ns

11

READY High to /IOW High

70

ns

12

/IOW High to READY Low

20

140

ns

13

Data Hold from /ACK Low

40

ns

14

Data Setup to /REQ Low

60

ns

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.

PS009101-0201