參數(shù)資料
型號: ADSP-2105
廠商: Analog Devices, Inc.
英文描述: ADSP-2100 Family DSP Microcomputers
中文描述: 的ADSP - 2100系列DSP的微機(jī)
文件頁數(shù): 33/64頁
文件大小: 666K
代理商: ADSP-2105
ADSP-21xx
REV. B
–33–
Frequency Dependency
(CLKIN
25 MHz)
Min
Parameter
Max
Unit
Timing Requirement:
t
RDD
RD Low to Data Valid
t
AA
A0–A13, PMS, DMS, BMS to Data Valid
t
RDH
Data Hold from RD High
Switching Characteristic:
t
RP
RD Pulse Width
t
CRD
CLKOUT High to RD Low
t
ASR
A0–A13, PMS, DMS, BMS Setup before
RD Low
t
RDA
A0–A13, PMS, DMS, BMS Hold after RD
Deasserted
t
RWR
RD High to RD or WR Low
0.5t
CK
– 13 + w
0.75t
CK
– 18 + w
ns
ns
0
0.5t
CK
– 8 + w
0.25t
CK
– 5
ns
ns
0.25t
CK
+ 10
0.25t
CK
– 10
1
ns
0.25t
CK
– 9
0.5t
CK
– 5
ns
ns
NOT ES
1
For 25 MHz only minimum frequency dependency formula for t
ASR
= (0.25t
CK
– 8.5).
w = wait states
×
t
CK .
TIMNGPARAMETERS (ADSP-2101/2105/2111/2115/2161/2163)
ME MORY RE AD
Figure 32. Memory Read
CLKOUT
A0 – A13
D
t
RDA
RD
WR
DMS, PMS
BMS
t
RWR
t
RP
t
ASR
t
CRD
t
RDD
t
AA
t
RDH
13 MHz
Min
13.824 MHz
Min
16.67 MHz
Min
20 MHz
Min
25 MHz
Min
Parameter
Max
Max
Max
Max
Max
Unit
Timing Requirement:
t
RDD
RD Low to Data Valid
t
AA
A0–A13, PMS, DMS, BMS to Data Valid
t
RDH
Data Hold from RD High
Switching Characteristic:
t
RP
RD Pulse Width
t
CRD
CLKOUT High to RD Low
t
ASR
A0–A13, PMS, DMS, BMS Setup before
RD Low
t
RDA
A0–A13, PMS, DMS, BMS Hold after RD
Deasserted
t
RWR
RD High to RD or WR Low
23.5
37.7
23.2
36.2
17
27
12
19.5
7
12
ns
ns
ns
0
0
0
0
0
33.5
14.2
9.2
28.2
13.1
8.1
22
10
5
17
7.5
2.5
12
5
1.5
1
ns
ns
ns
29.2
28.1
25
22.5
20
10.2
9.1
6
3.5
1
ns
33.5
31.2
25
20
15
ns
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