Analog Devices ADSP-2181 - Manual (Page 28)

ADSP-2181/ADSP-2183
REV. 0 –28–
ADSP-2181
Parameter Min Max Unit
IDMA Write, Long Write Cycle
Timing Requirements:
t
IKW
IACK Low before Start of Write 1 0 ns
t
IKSU
IAD15–0 Data Setup before IACK Low 2, 3 0.5t
CK
+ 10 ns
t
IKH
IAD15–0 Data Hold after IACK Low 2, 3 2 ns
Switching Characteristics:
t
IKLW
Start of Write to IACK Low 4 1.5t
CK
ns
t
IKHW
Start of Write to IACK High 15 ns
ADSP-2183
28.8 MHz
Parameter Min Max Unit
IDMA Write, Long Write Cycle
Timing Requirements:
t
IKW
IACK Low before Start of Write 1 0 ns
t
IKSU
IAD15–0 Data Setup before IACK Low 2, 3 0.5t
CK
+ 10 ns
t
IKH
IAD15–0 Data Hold after IACK Low 2, 3 2 ns
Switching Characteristics:
t
IKLW
Start of Write to IACK Low 4 1.5t
CK
ns
t
IKHW
Start of Write to IACK High 17 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 User’s Manual.
IAD 15–0 DATA
t
IKHW
t
IKW
IACK
IS
IWR
t
IKLW
t
IKH
t
IKSU
Figure 30. IDMA Write, Long Write Cycle