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DP5380 Datasheet(PDF) 24 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # DP5380
Description  Asynchronous SCSI Interface (ASI)
PDF  32 Pages
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

DP5380 Datasheet(HTML) 24 Page - National Semiconductor (TI)

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100 AC Electrical Characteristics (Continued)
109 DMA WRITE (BLOCK MODE) TARGET SEND
TLF9756 – 20
Symbol
Parameter
DP5380
Units
Min
Typ
Max
afrt
ACK False to REQ True (DACK or WR False)
120
ns
atrf
ACK True to REQ False (Target)
115
ns
atrt
ACK True to READY True (Block Mode Target Send)
110
ns
dhat
SCSI Data Hold from ACK True
40
ns
dhwr
DMA Data Hold Time from End of WR
30
ns
dsrt
SCSI Data Setup to REQ True
50
ns
dswd
Data Setup to End of DMA Write Enable
50
ns
dtdf
DACK True to DRQ False
100
ns
eop
Width of EOP Pulse (Note 1)
40
ns
rtwf
READY true to WR False
60
ns
wfrf
WR False to READY False
100
ns
wfrt
WR False to REQ True (ACK False)
120
ns
wwb
DMA Write Enable Width (Note 2)
60
ns
Note 1
EOP DACK RD WR must all be true for recognition of EOP
Note 2
Write enable (DMA) is DACK and WR active
24



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