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DP8496 Datasheet(PDF) 83 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # DP8496
Description  SCSI-2 Disk Data Controller
PDF  92 Pages
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

DP8496 Datasheet(HTML) 83 Page - National Semiconductor (TI)

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70 AC Specifications (Continued)
725 SCSI ASYNCHRONOUS INFORMATION IN PHASE AS INITIATOR
TLF11212 – 59
ID
Symbol
Parameter
Min
Typ
Max
Units
251
iodz
IO Valid to SCSI Data Released
4 bcp
ns
252
pcreq
Phase Change to REQ
50
ns
253
sds
Data Setup to REQ
0ns
254
reqlackl
REQ Low to ACK Low (Notes 1 and 2)
90
185
ns
255
sdh
Data Hold from ACK
0ns
256
reqhackh
REQ High to ACK High (Note 3)
40
60
ns
257
phack
Phase Hold from ACK High
0
ns
Note 1
bcp is the BCLK period in use
Note 2
Transfer Period (in Synchronous Transfer register) e 0 If Transfer Period e 1 then add an additional bcp
Note 3
This value is not valid for very last transfer ACK will stay asserted
All SCSI signals are active-high on the DP8497
83



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