Figure 21-13 DRAM Bus Timing (Read/Write): Three-State Access
— 2
CAS
Mode —
)
T
1
T
2
T
3
t
AD
t
AD
t
RAH
t
RAD1
t
AS1
t
ASD
t
AS1
t
AA
t
RAC
t
ASD
t
CAC
t
WDS3
t
RDS
t
WDH
t
RDH
t
SD
t
SD
t
RAD3
t
CRP
t
RP
t
CAS
RFSH
ø
A
9
to A
1
AS
CS
(
RAS
HWR
(
UCAS
),
LWR
(
LCAS
)
RD
(
WE
)
(read)
RD
(
WE
)
(write)
D
15
to D
0
(read)
(write)
D
15
to D
0
3
698
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