adsp-21mod870-100 Analog Devices, Inc., adsp-21mod870-100 Datasheet - Page 27
adsp-21mod870-100
Manufacturer Part Number
adsp-21mod870-100
Description
Internet Gateway Processor
Manufacturer
Analog Devices, Inc.
Datasheet
1.ADSP-21MOD870-100.pdf
(32 pages)
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Parameter
IDMA Write, Long Write Cycle
Timing Requirements:
t
t
t
Switching Characteristics:
t
t
NOTES
1
2
3
4
REV. 0
IKW
IKSU
IKH
IKLW
IKHW
Start of Write = IS Low and IWR Low.
If Write Pulse ends before IACK Low, use specifications t
If Write Pulse ends after IACK Low, use specifications t
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.
IACK Low before Start of Write
IAD15–0 Data Setup before IACK Low
IAD15–0 Data Hold after IACK Low
Start of Write to IACK Low
Start of Write to IACK High
IAD15–0
IACK
IWR
IS
Figure 29. IDMA Write, Long Write Cycle
IKSU
4
IDSU
, t
t
IKW
, t
IKH
1
IDH
.
.
2, 3, 4
2, 3, 4
t
IKHW
–27–
t
IKSU
t
IKLW
DATA
Min
0
0.5 t
2
1.5 t
4
CK
CK
+ 10
t
IKH
ADSP-21mod870
Max
15
Unit
ns
ns
ns
ns
ns
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