參數(shù)資料
型號(hào): ADSP-2104
廠商: Analog Devices, Inc.
元件分類: 數(shù)字信號(hào)處理
英文描述: low cost DSP microcomputers
中文描述: 低成本DSP單片機(jī)
文件頁數(shù): 25/36頁
文件大小: 333K
代理商: ADSP-2104
ADSP-2104/ADSP-2109
REV. 0
–25–
Frequency Dependency
(CLKIN
20 MHz)
Min
Parameter
Max
Unit
Switching Characteristic:
t
DW
Data Setup before WR High
t
DH
Data Hold after WR High
t
WP
WR Pulse Width
t
WDE
WR Low to Data Enabled
t
ASW
A0–A13, DMS, PMS Setup before WR Low
t
DDR
Data Disable before WR or RD Low
t
CWR
CLKOUT High to WR Low
t
AW
A0–A13, DMS, PMS, Setup before WR
Deasserted
t
WRA
A0–A13, DMS, PMS Hold after WR
Deasserted
t
WWR
WR High to RD or WR Low
0.5t
CK
– 13 + w
0.25t
CK
– 10
0.5t
CK
– 8 + w
0
0.25t
CK
– 10
0.25t
CK
– 10
0.25t
CK
– 5
ns
ns
ns
ns
ns
ns
0.25t
CK
+ 10
0.75t
CK
– 22 + w
ns
0.25t
CK
– 9
0.5t
CK
– 5
ns
ns
TIMNGPARAMETERS (ADSP-2104/ADSP-2109)
ME MORY WRIT E
Min
20 MHz
Parameter
Max
Unit
Switching Characteristic:
t
DW
Data Setup before WR High
t
DH
Data Hold after WR High
t
WP
WR Pulse Width
t
WDE
WR Low to Data Enabled
t
ASW
A0–A13, DMS, PMS Setup before
WR Low
t
DDR
Data Disable before WR or RD Low
t
CWR
CLKOUT High to WR Low
t
AW
A0–A13, DMS, PMS, Setup before WR
Deasserted
t
WRA
A0–A13, DMS, PMS Hold after WR
Deasserted
t
WWR
WR High to RD or WR Low
12
2.5
17
0
2.5
ns
ns
ns
ns
ns
2.5
7.5
15.5
ns
ns
ns
22.5
3.5
ns
20
ns
Figure 23. Memory Write
CLKOUT
A0 – A13
D
WR
DMS, PMS
RD
t
WDE
t
DDR
t
DH
t
WWR
t
WRA
t
WP
t
DW
t
AW
t
CWR
t
ASW
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