adsp-2165ks-80 Analog Devices, Inc., adsp-2165ks-80 Datasheet - Page 25

• Manufacturer Part Number: adsp-2165ks-80
• Description: Dsp Microcomputers With Rom
• Manufacturer: Analog Devices, Inc.

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TIMING PARAMETERS (ADSP-2161/ADSP-2163/ADSP-2165)
MEMORY READ
Parameter
Timing Requirements:
t
t
t
Switching Characteristics:
t
t
t
t
t
Parameter
Timing Requirements:
t
t
t
Switching Characteristics:
t
t
t
t
t
NOTES
1
For 25 MHz only, minimum frequency dependency formula for t
RDD
AA
RDH
RP
CRD
ASR
RDA
RWR
RDD
AA
RDH
RP
CRD
ASR
RDA
RWR
w = wait states
RD Low to Data Valid
A0–A13, PMS, DMS, BMS to Data Valid
Data Hold from RD High
RD Pulsewidth
CLKOUT High to RD Low
A0–A13, PMS, DMS, BMS Setup Before RD Low
A0–A13, PMS, DMS, BMS Hold After RD Deasserted
RD High to RD or WR Low
RD Low to Data Valid
A0–A13, PMS, DMS, BMS to Data Valid
Data Hold from RD High
RD Pulsewidth
CLKOUT High to RD Low
A0–A13, PMS, DMS, BMS Setup Before RD Low
A0–A13, PMS, DMS, BMS Hold After RD Deasserted
RD High to RD or WR Low
t
CK.
DMS, PMS,
CLKOUT
A0–A13
BMS
RD
WR
D
Figure 24. Memory Read
ASR
= (0.25t
t
CRD
t
ASR
t
AA
CK
–25–
– 8.5).
t
Min
0
22
10
5
6
25
RDD
16.67 MHz
t
RP
Min
0
0.5t
0.25t
0.25t
0.25t
0.5t
CK
CK
Max
17
27
25
CK
CK
CK
– 8 + w
– 5
– 5
– 10
– 9
t
RDA
Frequency Dependency
1
t
(CLKIN 25 MHz)
RDH
Min
0
17
7.5
2.5
3.5
20
t
RWR
20 MHz
Max
12
19.5
22.5
Max
0.5t
0.75t
0.25t
CK
CK
CK
– 13 + w
Min
0
12
5
1.5
1
15
– 18 + w
+ 10
ADSP-216x
25 MHz
1
Max
7
12
20
Unit
ns
ns
ns
ns
ns
ns
ns
ns
Unit
ns
ns
ns
ns
ns
ns
ns