
R01UH0823EJ0100 Rev.1.00
Page 641 of 1823
Jul 31, 2019
RX23W Group
24. Port Output Enable 2 (POE2a)
Figure 24.1
POE Block Diagram
ICSR3
ICSR1
Input level detection circuit
Falling edge detection
circuit
Low level
sampling circuit
POE3#
POE1#
POE0#
ICSR
2
Input level detection circuit
POE8#
POECR1
POECR2
H
igh-
impe
da
nc
e
requ
est
/in
te
rru
p
t
re
que
st
g
en
er
at
ion
ci
rcui
t
MTIOC3B
MTIOC4A
MTIOC4C
MTIOC4B
MTIOC4D
OC
S
R
1
MTIOC3D
Low level
sampling circuit
ICSR1:
ICSR2:
ICSR3:
OCSR1:
SPOER:
POECR1:
POECR2:
Input level control/status register 1
Input level control/status register 2
Input level control/status register 3
Output level control/status register 1
Software port output enable register
Port output enable control register 1
Port output enable control register 2
Falling edge detection
circuit
OSTST
PCLK
Divider
SPOER
PCLK/8
PCLK/16
PCLK/128
Output level
comparison circuit
Output level
comparison circuit
Output level
comparison circuit
High-impedance request signal
for MTU3 and MTU4 pins
High-impedance request signal
for MTU0 pins
Interrupt request signal OEI1
Interrupt request signal OEI2
Oscillation stop detection signal
from the clock generation circuit
Bus interface
Internal peripheral bus