Figure 21-11 DRAM Bus Timing (Refresh Cycle): Three-State Access
— 2
WE
Mode —
Figure 21-12 DRAM Bus Timing (Self-Refresh Mode)
— 2
WE
Mode —
ø
A
9
to A
1
AS
CS3
(
RAS
)
RD
(
CAS
)
HWR
(
UW
),
LWR
(
LW
)
RFSH
T
1
T
2
T
3
t
ASD
t
CSR
t
ASD
t
RAD2
t
RAD2
t
CSR
t
RAD3
t
SD
t
RAD3
t
SD
ø
CS
(
RAS
)
RD
(
CAS
)
RFSH
t
CSR
t
CSR
3
697
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