adsp-2165ks-80 Analog Devices, Inc., adsp-2165ks-80 Datasheet - Page 26

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

ADSP-216x
TIMING PARAMETERS (ADSP-2161/ADSP-2163/ADSP-2165)
MEMORY WRITE
Parameter
Switching Characteristics:
t
t
t
t
t
t
t
t
t
t
Parameter
Switching Characteristics:
t
t
t
t
t
t
t
t
t
t
NOTES
1
w = wait states
For 25 MHz only, the minimum frequency dependency formula for t
DW
DH
WP
WDE
ASW
DDR
CWR
AW
WRA
WWR
DW
DH
WP
WDE
ASW
DDR
CWR
AW
WRA
WWR
Data Setup Before WR High
Data Hold After WR High
WR Pulsewidth
WR Low to Data Enabled
A0–A13, DMS, PMS Setup Before WR Low
Data Disable Before WR or RD Low
CLKOUT High to WR Low
A0–A13, DMS, PMS, Setup Before WR Deasserted
A0–A13, DMS, PMS Hold After WR Deasserted
WR High to RD or WR Low
Data Setup Before WR High
Data Hold After WR High
WR Pulsewidth
WR Low to Data Enabled
A0–A13, DMS, PMS Setup Before WR Low
Data Disable Before WR or RD Low
CLKOUT High to WR Low
A0–A13, DMS, PMS, Setup Before WR Deasserted
A0–A13, DMS, PMS Hold After WR Deasserted
WR High to RD or WR Low
t
CK
.
DMS, PMS,
CLKOUT
A0–A13
BMS
WR
RD
D
Figure 25. Memory Write
t
CWR
ASW
and t
t
ASW
DDR
–26–
= (0.25t
t
WDE
t
AW
Min
17
5
22
0
5
5
10
23
6
25
16.67 MHz
t
WP
CK
Min
0.5t
0.25t
0.5t
0
0.25t
0.25t
0.25t
0.75t
0.25t
0.5t
t
– 8.5).
DW
Max
25
CK
CK
CK
Frequency Dependency
CK
CK
CK
CK
CK
CK
(CLKIN 25 MHz)
– 13 + w
– 8 + w
– 5
– 10
– 10
– 10
– 5
– 22 + w
– 9
t
WRA
t
DH
1
1
Min
12
2.5
17
0
2.5
2.5
7.5
15.5
3.5
20
t
WWR
20 MHz
t
DDR
Max
22.5
Max
0.25t
CK
+ 10
Min
7
0
12
0
1.5
1.5
5
8
1
15
25 MHz
1
1
Max
20
REV. 0
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns