147
By program wait
T
p
Address bus
ø
WAIT
T
r
T
c1
T
w
T
w
T
c2
By
WAIT
pin
RASn
(
CSn
)
Read
Write
UCAS
,
LCAS
UCAS
,
LCAS
WE
(
HWR
)
OE
(
RD
)
Data bus
WE
(
HWR
)
OE
(
RD
)
Data bus
Row address
Column address
High
High
Note: Downward arrows indicate the timing of
WAIT
pin sampling.
n = 2 to 5
Figure 4.25 Example of Wait State Insertion Timing (1)
(2-State Column Address Output)
Summary of Contents for H8S/2670
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