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DP8496 Datasheet(PDF) 80 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) 80 Page - National Semiconductor (TI)

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70 AC Specifications (Continued)
719 SCSI SELECTION AS INITIATOR
(With Arbitration)
TLF11212 – 53
ID
Symbol
Parameter
Optimal BCLK
Worst Case
Units
Min
Max
Min
Max
191
bobi
BSY Out Released to BSY In Asserted (Note 1)
400
400
ns
192
bisel
BSY In Asserted to SEL Out Deasserted
90
90
ns
193
selid
SEL Out Asserted to Valid SCSI ID Out
12
14
12
21
m
s
194
selbo
Valid SCSI ID Out to BSY Out Deasserted
90
230
90
350
ns
195
seld
SEL Out Deasserted to SCSI ID Out Invalid
b
30
30
b
30
30
ns
196
datn
Valid SCSI ID Out to ATN Out Asserted (If Enabled)
b
30
30
b
30
30
ns
197
bIIDI
BSY In Asserted to SCSI ID Out Invalid
90
90
ns
Note 1
BSY may be asserted sooner but it will not be detected until (bobi) time has passed
All SCSI signals are active-high on the DP8497
620 SCSI RESELECTION AS INITIATOR
TLF11212 – 54
ID
Symbol
Parameter
Optimal BCLK
Worst Case
Units
Min
Max
Min
Max
201
bihbol
BSY In Deasserted to BSY Out Asserted (Note 1)
400
800
400
1300
ns
202
blsh
BSY Out Asserted to SEL In Hold
0
0
ns
203
blih
BSY In Asserted to SCSI ID Hold
0
0
ns
Note 1
This time starts when BSY is deasserted AND SEL is asserted AND IO is asserted AND the logical OR of SCSI ID is valid
All SCSI signals are active-high on the DP8497
80



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