adsp-2109lkp-55 Analog Devices, Inc., adsp-2109lkp-55 Datasheet - Page 25

• Manufacturer Part Number: adsp-2109lkp-55
• Description: Low Cost Dsp Microcomputers
• Manufacturer: Analog Devices, Inc.

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TIMING PARAMETERS (ADSP-2104/ADSP-2109)
MEMORY WRITE
Parameter
Switching Characteristic:
t
t
t
t
t
t
t
t
t
t
Parameter
Switching Characteristic:
t
t
t
t
t
t
t
t
t
t
WRA
DW
DH
WP
WDE
ASW
DDR
CWR
AW
WWR
DW
DH
WP
WDE
ASW
DDR
CWR
AW
WRA
WWR
Data Setup before WR High
Data Hold after WR High
WR Pulse Width
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 Pulse Width
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
DMS, PMS
CLKOUT
A0 – A13
WR
RD
D
Figure 23. Memory Write
t
CWR
t
ASW
–25–
t
WDE
t
AW
0.75t
0.25t
Min
0.5t
0.25t
0.5t
0
0.25t
0.25t
0.25t
0.5t
Min
12
2.5
17
0
2.5
2.5
7.5
15.5
3.5
20
Frequency Dependency
t
WP
(CLKIN 20 MHz)
CK
CK
CK
CK
CK
CK
CK
CK
CK
t
DW
– 13 + w
– 8 + w
– 5
– 10
– 10
– 5
– 22 + w
– 9
– 10
t
20 MHz
WRA
t
DH
ADSP-2104/ADSP-2109
t
WWR
Max
0.25t
t
DDR
CK
Max
22.5
+ 10
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns