REV. D
ADSP-2181
–18–
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 Pulsewidth 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
– 4 ns
t
DDR
Data Disable before WR or RD Low 0.25t
CK
– 4 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 × 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 12. Memory Write
