ADSP-218XN Datasheet, PDF (35/45 Pages) Analog Devices – DSP Microcomputer

ADSP-218xN Series
IDMA Write, Long Write Cycle
Table 23. IDMA Write, Long Write Cycle
Parameter
Min
Max
Unit
Timing Requirements:
t_IKW
t_IKSU
t_IKH
IACK Low before Start of Write¹
IAD15–0 Data Setup before End of Write^{2, 3, 4}
IAD15–0 Data Hold after End of Write^{2, 3, 4}
Switching Characteristics:
t_IKLW
t_IKHW
Start of Write to IACK Low⁴
Start of Write to IACK High
0
ns
0.5t_CK + 5
ns
0
ns
1.5t_CK
ns
10
ns
1_{Start of Write = IS Low and IWR Low.}
2_{If Write Pulse ends before IACK Low, use specifications tIDSU, tIDH.}
3_{If Write Pulse ends after IACK Low, use specifications tIKSU, tIKH.}
4_{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.}
IACK
IS
t_IKW
t_IKHW
t_IKLW
IWR
IAD15–0
t_IKSU
t_IKH
DATA
Figure 32. IDMA Write, Long Write Cycle
REV. 0
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