160
When DDS = 1 or EDDS = 1: Burst access is performed by determining the address only,
irrespective of the bus master. With the DRAM interface, the
DACK
or
EDACK
output goes low
from the T
c1
state.
Figure 4.40 shows the
DACK
/
EDACK
output timing for the DRAM interface when DDS = 1 or
EDDS = 1.
T
p
ø
RASn
(
CSn
)
Read
Write
UCAS
,
LCAS
WE
(
HWR
)
OE
(
RD
)
Data bus
WE
(
HWR
)
OE
(
RD
)
Data bus
DACK
or
EDACK
Address bus
T
r
T
c1
T
c2
Note: n = 2 to 5
Row address
Column address
High
High
Figure 4.40 Example of
DACK
/
EDACK
Output Timing when DDS = 1 or EDDS = 1 (1)
(RAST = 0, CAST = 0)
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