ADSP-2171 Analog Devices, ADSP-2171 Datasheet - Page 23

• Manufacturer Part Number: ADSP-2171
• Description: ADSP-2100 Family DSP Microcomputers
• Manufacturer: Analog Devices

REV. A
ADSP-2171/ADSP-2172
Parameter
Memory Write
Switching Characteristic:
t
t
t
t
t
t
t
t
t
t
w = wait states x t
DW
DH
WP
WDE
ASW
DDR
CWR
AW
WRA
WWR
CK
.
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 12. Memory Write
t
CWR
t
AS W
–23–
t
WDE
t
AW
ADSP-2171/ADSP-2172/ADSP-2173
t
WP
t
DW
Min
0.5 t
0.25t
0.5t
0
0.25t
0.25t
0.25t
0.75t
0.25t
0.5t
CK
CK
CK
CK
CK
CK
CK
CK
CK
t
– 5 + w
– 5
– 7 + w
WRA
– 2
– 6
– 5
– 9 + w
– 3
– 7
t
DH
t
WWR
t
DD R
Max
0.25 t
CK
+ 7
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns