ADSP2185 datasheet(25/32 Pages) AD

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ADSP-2185

REV. 0

–25–

Parameter

Min

Max

Unit

IDMA Write, Long Write Cycle

Timing Requirements:

tIKW

IACK Low before Start of Write

0ns

tIKSU

IAD15–0 Data Setup before

IACK Low

2, 3, 4

0.5 tCK + 10

tIKH

IAD15–0 Data Hold after

IACK Low

2, 3, 4

2ns

Switching Characteristics:

tIKLW

Start of Write to

IACK Low

1.5 tCK

tIKHW

Start of Write to

IACK High

NOTES

1Start of Write = IS Low and IWR Low.

2If Write Pulse ends before IACK Low, use specifications t

IDSU, tIDH.

3If Write Pulse ends after IACK Low, use specifications t

IKSU, tIKH.

4This 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.

IAD 15–0

DATA

tIKHW

tIKW

IACK

IWR

tIKLW

tIKH

tIKSU

Figure 22. IDMA Write, Long Write Cycle

ADSP2185 Datasheet(PDF) 25 Page - Analog Devices

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