Analog Devices ADSP-2186 - Manual (Page 24)

ADSP-2186
REV. 0 –24–
TIMING PARAMETERS
Parameter Min Max Unit
IDMA Write, Short Write Cycle
Timing Requirements:
t
IKW
IACK Low before Start of Write 1 0 ns
t
IWP
Duration of Write 1, 2 15 ns
t
IDSU
IAD15–0 Data Setup before End of Write 2, 3, 4 5 ns
t
IDH
IAD15–0 Data Hold after End of Write 2, 3, 4 2 ns
Switching Characteristics:
t
IKHW
Start of Write to IACK High 15 ns
NOTES
1 Start of Write = IS Low and IWR Low.
2 End of Write = IS High or IWR High.
3 If Write Pulse ends before IACK Low, use specifications t
IDSU
, t
IDH
.
4 If Write Pulse ends after IACK Low, use specifications t
IKSU
, t
IKH
.
IAD 15–0 DATA
t
IKHW
t
IKW
t
IDSU
IACK
t
IWP
t
IDH
IS
IWR
Figure 21. IDMA Write, Short Write Cycle