Analog Devices ADSP-2181 - Manual (Page 24)

ADSP-2181/ADSP-2183
REV. 0 –24–
ADSP-2181/ADSP-2183
Parameter Min Max Unit
Memory Write
Switching Characteristics:
t
DW
Data Setup before WR High 0.5t
CK
– 7+ w ns
t
DH
Data Hold after WR High 0.25t
CK
– 2 ns
t
WP
WR Pulse Width 0.5t
CK
– 5 + w ns
t
WDE
WR Low to Data Enabled 0 ns
t
ASW
A0-A13, xMS Setup before WR Low 0.25t
CK
– 6 ns
t
DDR
Data Disable before WR or RD Low 0.25t
CK
– 7 ns
t
CWR
CLKOUT High to WR Low 0.25t
CK
– 5 0.25 t
CK
+ 7 ns
t
AW
A0-A13, xMS, Setup before WR Deasserted 0.75t
CK
– 9 + w ns
t
WRA
A0-A13, xMS Hold after WR Deasserted 0.25t
CK
– 3 ns
t
WWR
WR High to RD or WR Low 0.5t
CK
– 5 ns
w = wait states x t
CK
xMS = PMS, DMS, CMS, IOMS, BMS
CLKOUT
A0–A13
D
t
WP
t
AW
t
CWR
t
DH
t
WDE
t
DW
t
ASW
t
WWR
t
WRA
t
DDR
DMS , PMS,
BMS , CMS,
IOMS
RD
WR
Figure 26. Memory Write