Analog Devices ADSP-2183, ADSP-2181 manual Parameter Min Max Unit Idma Write, Long Write Cycle

ADSP-2181/ADSP-2183

ADSP-2181

Parameter							Min	Max	Unit
IDMA Write, Long Write Cycle
Timing Requirements:
tIKW	IACK	Low before Start of Write1					0		ns
tIKSU	IAD15–0 Data Setup before				IACK	Low2, 3	0.5tCK + 10		ns
tIKH	IAD15–0 Data Hold after IACK Low2, 3						2		ns
Switching Characteristics:
tIKLW	Start of Write to		IACK	Low4			1.5tCK		ns
tIKHW	Start of Write to IACK High							15	ns

ADSP-2183

									28.8 MHz
Parameter									Min	Max	Unit
IDMA Write, Long Write Cycle
Timing Requirements:
tIKW	IACK	Low before Start of Write1							0		ns
tIKSU	IAD15–0 Data Setup before					IACK		Low2, 3	0.5tCK + 10		ns
tIKH	IAD15–0 Data Hold after				IACK		Low2, 3		2		ns
Switching Characteristics:
tIKLW	Start of Write to		IACK	Low4					1.5tCK		ns
tIKHW	Start of Write to		IACK	High						17	ns

NOTES

1Start of Write = IS Low and IWR Low.

2If Write Pulse ends before IACK Low, use specifications tIDSU, tIDH.

3If Write Pulse ends after IACK Low, use specifications tIKSU, tIKH.

4This is the earliest time for IACK Low from Start of Write. For IDMA Write cycle relationships, please refer to the User’s Manual.

	tIKW
IACK
	tIKHW
	tIKLW
IS
IWR
	tIKSU	tIKH
IAD 15–0		DATA

Figure 30. IDMA Write, Long Write Cycle

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