Datasheet

ADSP-2184L/ADSP-2185L/ADSP-2186L/ADSP-2187L
Rev. C | Page 31 of 48 | January 2008
IDMA Write, Short Write Cycle
Table 21. IDMA Write, Short Write Cycle
Parameter Min Max Unit
Timing Requirements:
t
IKW
IACK Low Before Start of Write
1
0ns
t
IWP
Duration of Write
1, 2
15 ns
t
IDSU
IAD15–0 Data Setup Before End of Write
2, 3, 4
5ns
t
IDH
IAD15–0 Data Hold After End of Write
2, 3, 4
2ns
Switching Characteristic:
t
IKHW
Start of Write to IACK High
5
17 ns
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
.
5
For the ADSP-2185L, and the ADSP-2187L, this specification is 4 ns min., and 15 ns max.
Figure 23. IDMA Write, Short Write Cycle
IAD15–0
DATA
t
IKHW
t
IKW
t
IDSU
IACK
t
IWP
t
IDH
IS
IWR