參數(shù)資料
型號: ADSP-21MOD980N
廠商: Analog Devices, Inc.
英文描述: MultiPort Internet Gateway Processor
中文描述: 通寶互聯(lián)網(wǎng)網(wǎng)關(guān)處理器
文件頁數(shù): 31/42頁
文件大?。?/td> 566K
代理商: ADSP-21MOD980N
31
REV. PrB
6/2001
For current information contact Analog Devices at (800) ANALOGD
ADSP-21mod980N
PRELIMINARY TECHNICAL DATA
IDMA Write, Short Write Cycle
Table 13. IDMA Write, Short Write Cycle
Parameter
Description
Min.
Max
Unit
Timing Requirements:
t
IKW
IACK Low before Start of Write
1, 2
0
ns
t
IWP
Duration of Write
1, 2,
3
10
ns
t
IDSU
IAD[15:0] Data Setup before End of Write
2, 3, 4, 5
3
ns
t
IDH
IAD[15:0] Data Hold after End of Write
2, 3, 4, 5
2
ns
Switching Characteristics:
t
IKHW
Start of Write to IACK High
10
ns
1
Start of Write = IS Low and IWR Low.
2
For IDMA, please refer to the
ADSP-2100 Family User
s Manual
.
3
End of Write = IS High or IWR High.
4
If Write Pulse ends before IACK Low, use specifications t
IDSU
, t
IDH
.
5
If Write Pulse ends after IACK Low, use specifications t
IKSU
, t
IKH
.
Figure 23. IDMA Write, Short Write Cycle
IAD 15-0
DATA
t
IKHW
t
IKW
t
IDSU
IACK
t
IW P
t
IDH
IS
IW R
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