ADSP-2185L
Parameter
IDMA Write, Long Write Cycle
Timing Requirements:
IACK
Low before Start of Write
1
t
IKW
IAD15鈥? Data Setup before
IACK
Low
2, 3, 4
t
IKSU
t
IKH
IAD15鈥? Data Hold after
IACK
Low
2, 3, 4
Switching Characteristics:
Start of Write to
IACK
Low
4
t
IKLW
t
IKHW
Start of Write to
IACK
High
0
0.5t
CK
+ 10
2
1.5t
CK
4
ns
ns
ns
ns
ns
Min
Max
Unit
15
NOTES
1
Start of Write =
IS
Low and
IWR
Low.
2
If Write Pulse ends before
IACK
Low, use specifications t
IDSU
, t
IDH
.
3
If Write Pulse ends after
IACK
Low, use specifications t
IKSU
, t
IKH
.
4
This is the earliest time for
IACK
Low from Start of Write. For IDMA Write cycle relationships, please refer to the
ADSP-2100 Family User鈥檚 Manual, Third Edition.
t
IKW
IACK
t
IKHW
t
IKLW
IS
IWR
t
IKSU
IAD15鈥?
DATA
t
IKH
Figure 27. IDMA Write, Long Write Cycle
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