參數(shù)資料
型號: ADSP-2141L
廠商: ANALOG DEVICES INC
元件分類: 加密電路
英文描述: Cap-Free, NMOS, 150mA Low Dropout Regulator with Reverse Current Protection
中文描述: TELECOM, DATA ENCRYPTION CIRCUIT, PQFP208
封裝: METRIC, PLASTIC, QFP-208
文件頁數(shù): 23/39頁
文件大?。?/td> 257K
代理商: ADSP-2141L
REV. 0
ADSP-2141L
–23–
Parameter
Min
Max
Unit
External Memory Write: ADSP-2141L DMA Initiated
Switching Characteristics:
t
A
Clock to Address and
DMSx
t
DW
Data Setup Before Write Deasserted
t
DH
Data Hold After Write Deasserted
t
WP
Write Pulsewidth
t
WDE
Write Low to Data Enabled
t
ASW
Address,
DMSx
Setup Before Write Low
t
DDR
Data Disable Before Write/Read Low
t
CWR
Clock High to Write Low
t
AW
Address,
DMSx
Setup Before Write High
t
AH
Address and
DMSx
Hold After Clock
t
WRA
Address,
DMSx
Hold After Write High
t
WWR
Write High to Read/Write Low
5
0.5t
CK
– 2 + w
0.5t
CK
– 8
0.5t
CK
– 5 + w
–5
1
0
6
0.5t
CK
– 2 + w
2
0.5t
CK
– 7
0.5t
CK
– 3
9
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
12
1. If wait-state(s) added, then referenced to last wait-state clock interval.
2. w = DMA wait states
×
t
CK
.
t
AH
25ns (REF @ 40MHz)
t
ASW
t
A
t
AW
t
WRA
t
WWR
t
CWR
t
WP
t
WDE
t
DW
t
DH
t
DDR
DSP CLOCK
OUT
EXT. ADDR
(A25–0)
EXT.
DMSH
EXT.
DMSL
EXT.
WR
EXT. DATA
(D31–0)
Figure 13. External Memory Write: ADSP-2141L DMA Initiated
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