Datasheet

Section 6 Bus Controller (BSC)
R01UH0309EJ0500 Rev. 5.00 Page 235 of 1408
Sep 24, 2012
H8S/2456, H8S/2456R, H8S/2454 Group
By program wait
T
p
Address bus
φ
WAIT
T
r
T
c1
T
w
T
w
T
c2
T
c3
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 6.39 Example of Wait State Insertion Timing
(3-State Column Address Output)