ADSP-2187L Analog Devices, ADSP-2187L Datasheet - Page 27

• Manufacturer Part Number: ADSP-2187L
• Description: DSP Microcomputer
• Manufacturer: Analog Devices

REV. 0
Parameter
IDMA Write, Long Write Cycle
Timing Requirements:
t
t
t
Switching Characteristics:
t
t
NOTES
1
2
3
4
Start of Write = IS Low and IWR Low.
If Write Pulse ends before IACK Low, use specifications t
If Write Pulse ends after IACK Low, use specifications t
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, Third Edition.
IKW
IKSU
IKH
IKLW
IKHW
IACK Low before Start of Write
IAD15–0 Data Setup before IACK Low
IAD15–0 Data Hold after IACK Low
Start of Write to IACK Low
Start of Write to IACK High
IAD15–0
IACK
IWR
IS
Figure 28. IDMA Write, Long Write Cycle
IKSU
4
IDSU
, t
t
IKW
, t
1
IKH
IDH
.
.
2, 3, 4
2, 3, 4
t
IKHW
–27–
t
IKSU
t
IKLW
DATA
Min
0
0.5t
2
1.5t
4
CK
CK
+ 10
t
IKH
Max
15
ADSP-2187L
Unit
ns
ns
ns
ns
ns