參數(shù)資料
型號(hào): ADSP-2185LBST-115
廠商: ANALOG DEVICES INC
元件分類: 數(shù)字信號(hào)處理
英文描述: DSP Microcomputer
中文描述: 24-BIT, 26.3 MHz, OTHER DSP, PQFP100
封裝: MS-026BED, LQFP-100
文件頁(yè)數(shù): 26/31頁(yè)
文件大小: 223K
代理商: ADSP-2185LBST-115
REV. A
ADSP-2185L
–26–
Parameter
Min
Max
Unit
IDMA Write, Long Write Cycle
Timing Requirements
:
t
IKW
t
IKSU
t
IKH
IACK
Low before Start of Write
1
IAD15–0 Data Setup before
IACK
Low
2, 3, 4
IAD15–0 Data Hold after
IACK
Low
2, 3, 4
0
0.5t
CK
+ 10
2
ns
ns
ns
Switching Characteristics
:
t
IKLW
t
IKHW
Start of Write to
IACK
Low
4
Start of Write to
IACK
High
1.5t
CK
4
ns
ns
15
NOTES
1
Start of Write =
IS
Low and
IWR
Low.
2
If Write Pulse ends before
IACK
Low, use specifications t
IDSU
, t
IDH
.
3
If Write Pulse ends after
IACK
Low, use specifications t
, t
.
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
,
Third Edition
.
IAD15–0
DATA
t
IKHW
t
IKW
IACK
IS
IWR
t
IKLW
t
IKH
t
IKSU
Figure 27. IDMA Write, Long Write Cycle
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