DP5380 Datasheet, PDF (21/32 Pages) National Semiconductor (TI) – Asynchronous SCSI Interface (ASI)

10 0 AC Electrical Characteristics (Continued)
10 6 DMA WRITE (NON-BLOCK MODE) INITIATOR SEND
Symbol
Parameter
dfaf
DACK False to ACK False (Non-Block Initiator Send)
dfdt
DACK False to DRQ True
dhi
SCSI Data Hold from Write Enable Initiator
dhwr
DMA Data Hold Time from End of WR
dkhw
DACK Hold from End of WR
dswd
Data Setup to End of DMA Write Enable
dtdf
DACK True to DRQ False
eop
Width of EOP Pulse (Note 1)
rfdt
REQ False to DRQ True
rtat
REQ True to ACK True (Initiator Send)
wwn
DMA Non-Block Mode Write Enable Width (Note 2)
Note 1 EOP DACK RD WR must all be true for recognition of EOP
Note 2 Write enable (DMA) is DACK and WR active
TL F 9756 – 17
DP5380
Min
Typ
Max
120
30
90
15
30
0
50
100
40
100
100
60
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
21