Analog Devices ADSP-2181 manual Parameter Min Max Unit Idma Write, Short Write Cycle, 28.8 MHz

ADSP-2181/ADSP-2183

ADSP-2181

Parameter					Min	Max	Unit
IDMA Write, Short Write Cycle
Timing Requirements:
tIKW	IACK	Low before Start of Write1			0		ns
tIWP	Duration of Write1, 2				15		ns
tIDSU	IAD15–0 Data Setup before End of Write2, 3, 4				5		ns
tIDH	IAD15–0 Data Hold after End of Write2, 3, 4				2		ns
Switching Characteristics:
tIKHW	Start of Write to		IACK	High		15	ns

ADSP-2183

						28.8 MHz
Parameter					Min	Max
IDMA Write, Short Write Cycle
Timing Requirements:
tIKW	IACK	Low before Start of Write1			0
tIWP	Duration of Write1, 2				15
tIDSU	IAD15–0 Data Setup before End of Write2, 3, 4				5
tIDH	IAD15–0 Data Hold after End of Write2, 3, 4				2
Switching Characteristics:
tIKHW	Start of Write to		IACK	High		17

NOTES

1Start of Write = IS Low and IWR Low.

2End of Write = IS High or IWR High.

3If Write Pulse ends before IACK Low, use specifications tIDSU, tIDH. 4If Write Pulse ends after IACK Low, use specifications tIKSU, tIKH.

	tIKW
IACK
	tIKHW
IS
	tIWP
IWR
	tIDH
	tIDSU
IAD 15–0	DATA

Unit

ns ns ns ns

ns

Figure 29. IDMA Write, Short Write Cycle

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