REV. A
ADSP-2189M
–27–
Parameter Min Max Unit
IDMA Write, Long Write Cycle
Timing Requirements:
t
IKW
IACK Low before Start of Write
1
0ns
t
IKSU
IAD15–0 Data Setup before End of Write
2, 3, 4
0.5t
CK
+ 5 ns
t
IKH
IAD15–0 Data Hold after End of Write
2, 3, 4
0ns
Switching Characteristics:
t
IKLW
Start of Write to IACK Low
4
1.5t
CK
ns
t
IKHW
Start of Write to IACK High 10 ns
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’s Manual, Third Edition.
IAD15–0
DATA
t
IKHW
t
IKW
IACK
IS
IWR
t
IKLW
t
IKH
t
IKSU
Figure 30. IDMA Write, Long Write Cycle
