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DP5380 Datasheet(PDF) 20 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) 20 Page - National Semiconductor (TI)

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100 AC Electrical Characteristics (Continued)
105 DMA WRITE (NON-BLOCK MODE) TARGET SEND
TLF9756 – 16
Symbol
Parameter
DP5380
Units
Min
Typ
Max
afrt
ACK False to REQ True (DACK or WR False)
120
ns
atdt
ACK True to DRQ True (Target)
90
ns
atrf
ACK True to REQ False (Target)
115
ns
dfdt
DACK False to DRQ True
30
90
ns
dfrt
DACK False to REQ True (ACK False)
110
ns
dhwr
DMA Data Hold Time from End of WR
30
ns
dkhw
DACK Hold from End of WR
0
ns
dsrt
SCSI Data Setup to REQ True (Target Send) (Note 1)
40
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 2)
40
ns
wwn
DMA Non-Block Mode Write Enable Width (Note 3)
60
ns
Note 1
EOP DACK RDWR must all be true for recognition of EOP
Note 2
Write enable (DMA) is DACK and WR active
20



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