399
Tp
Tr
Tc1
Tcw
Tcwp
Tc2
ø
A23 to A0
RAS5
to
RAS2
UCAS
,
LCAS
OE
,
RD
HWR
D15 to D0
UCAS
,
LCAS
OE
,
RD
HWR
t
WTS
t
WTH
t
WTS
t
WTH
D15 to D0
AS
WAIT
Read
Write
Tcw:
Wait cycle inserted by programmable wait function
Tcwp: Wait cycle inserted by pin wait function
DACK0
,
DACK1
EDACK0
to
EDACK3
DACK
and
EDACK
timing: when DDS = 0 and EDDS = 0
RAS
timing: when RAST = 0
Note:
Figure 7.14 DRAM Access Timing: Two-State Access, One Wait
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