Analog Devices ADSP-2181 Manual page 28

ADSP-2181/ADSP-2183
ADSP-2181
Parameter
IDMA Write, Long Write Cycle
Timing Requirements:
t IACK Low before Start of Write
IKW
t IAD15–0 Data Setup before IACK Low
IKSU
t IAD15–0 Data Hold after IACK Low
IKH
Switching Characteristics:
t Start of Write to IACK Low
IKLW
t Start of Write to IACK High
IKHW
ADSP-2183
Parameter
IDMA Write, Long Write Cycle
Timing Requirements:
t IACK Low before Start of Write
IKW
t IAD15–0 Data Setup before IACK Low
IKSU
t IAD15–0 Data Hold after IACK Low
IKH
Switching Characteristics:
t Start of Write to IACK Low
IKLW
t Start of Write to IACK High
IKHW
NOTES
1
Start of Write = IS Low and IWR Low.
2
If Write Pulse ends before IACK Low, use specifications t
3
If Write Pulse ends after IACK Low, use specifications t
4
This is the earliest time for IACK Low from Start of Write. For IDMA Write cycle relationships, please refer to the User's Manual.
1
2, 3
2, 3
4
1
2, 3
2, 3
4
, t .
IDSU IDH
, t .
IKSU IKH
t
IKW
IACK
IS
IWR
IAD 15–0
Figure 30. IDMA Write, Long Write Cycle
Min
0
0.5t + 10
CK
2
1.5t
CK
28.8 MHz
Min
0
0.5t + 10
CK
2
1.5t
CK
t
IKHW
t
IKLW
t
IKSU
t
IKH
DATA
–28–
Max Unit
ns
ns
ns
ns
15 ns
Max Unit
ns
ns
ns
ns
17 ns
REV. 0