參數(shù)資料
型號(hào): ADSP-2141LKS-E1
廠(chǎng)商: ANALOG DEVICES INC
元件分類(lèi): 加密電路
英文描述: DSP
中文描述: TELECOM, DATA ENCRYPTION CIRCUIT, PQFP208
封裝: METRIC, PLASTIC, QFP-208
文件頁(yè)數(shù): 25/39頁(yè)
文件大小: 257K
代理商: ADSP-2141LKS-E1
REV. 0
ADSP-2141L
–25–
Parameter
Min
Max
Unit
External Memory Write: ADSP-2141L DSP Initiated
Switching Characteristics:
t
A
Clock to Address,
xMS
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,
xMS
Setup Before Write Low
t
DDR
Data Disable Before Write/Read Low
t
CWR
Clock High to Write Low
t
AW
Address,
xMS
Setup Before Write High
t
AH
Address,
xMS
Hold After Clock
t
WRA
Address,
xMS
Hold After Write High
t
WWR
Write High to Read/Write Low
1
0.5t
CK
– 7 + w
0.25t
CK
– 3.5
0.5t
CK
– 5 + w
0
0.25t
CK
– 4
0.25t
CK
– 4
0.25t
CK
0.75t
CK
– 6 + w
1
0.25t
CK
– 4
0.5t
CK
– 5
6
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
0.5t
CK
+ 9
1. If wait-state(s) added, then referenced to last wait-state clock interval.
2. w = DSP wait states
×
t
CK .
t
AW
DSP CLOCK
OUT
EXT. ADDR
(A13–0)
EXT.
WR
EXT. DATA
(D23–0)
t
AH
t
WRA
t
ASW
t
WP
25ns (REF @ 40MHz)
t
A
t
CWR
t
WWR
t
WDE
t
DW
t
DH
t
DDR
PMS
,
DMSx
,
BMS
,
IOMS
,
CMS
Figure 15. External Memory Write: ADSP-2141L DSP Initiated
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