Datasheet
Section 10 I/O Ports 
R01UH0310EJ0500 Rev. 5.00    Page 517 of 1384 
Sep 25, 2012     
H8S/2426, H8S/2426R, H8S/2424 Group 
Mode 3, 7 
Port  Description  Mode 1  Mode 2  Mode 4 
EXPE = 1  EXPE = 0 
Schmitt-
triggered 
input Pin*
2
Input Pull-
up MOS 
Capability 
Open Drain 
Output 
Capability 
5-V 
Tolerance*
1
Port 4 
General I/O port 
also functioning 
as A/D converter 
analog inputs and 
interrupt inputs 
P47/IRQ7-B/AN7_0 
P46/IRQ6-B/AN6_0 
P45/IRQ5-B/AN5_0 
P44/IRQ4-B/AN4_0 
P43/IRQ3-B/AN3_0 
P42/IRQ2-B/AN2_0 
P41/IRQ1-B/AN1_0 
P40/IRQ0-B/AN0_0 
IRQ7-B 
IRQ6-B 
IRQ5-B 
IRQ4-B 
IRQ3-B 
IRQ2-B 
IRQ1-B 
IRQ0-B 
⎯  ⎯  ⎯ 
P53/IRQ3-A /ADTRG0-A  IRQ3-A 
All output 
pin 
functions 
P52/BACK-B/IRQ2-A /PO4-B/TIOCA4-B/ 
TMO0-B/SCK2 
P52/IRQ2-A/
PO4-B/ 
TIOCA4-B/ 
TMO0-B/ 
SCK2 
IRQ2-A, 
TIOCA4-B 
All output 
pin 
functions 
other than 
BACK-B 
⎯ 
P51/BREQ-B/IRQ1-A/PO2-B/TIOCC3-B/ 
TMCI0-B/RxD2/SCL3 
P51/IRQ1-A/
PO2-B/ 
TIOCC3-B/ 
TMCI0-B/ 
RxD2/SCL3 
IRQ1-A, 
TIOCC3-B, 
TMCI0-B, 
SCL3 
All output 
pin 
functions 
Port 5 
General I/O port 
also functioning 
as interrupt 
inputs, 
A/D converter 
inputs, SCI I/Os, 
PPG outputs, 
TPU I/Os, TMR 
I/Os, 
I
2
C I/Os, and bus 
control signal 
I/Os 
P50/BREQO-B/IRQ0-A/PO0-B/TIOCA3-B/ 
TMRI0-B/TxD2/SDA3 
P50/IRQ0-A/
PO0-B/ 
TIOCA3-B/ 
TMRI0-B/ 
TxD2/SDA3 
IRQ0-A, 
TIOCA3-B, 
TMRI0-B, 
SDA3 
⎯ 
All output 
pin 
functions 
other than 
BREQO-B 
O 
P85/PO5-B/TIOCB4-B/TMO1-B/SCK3 TIOCB4-B  ⎯ 
P83/PO3-B/TIOCD3-B/ TMCI1-B/RxD3 
TIOCD3-B, 
TMCI1-B 
Ο 
Port 8 
General I/O port 
also functioning 
as PPG outputs, 
TPU I/Os, 
TMR I/Os, and 
SCI I/Os 
P81/PO1-B/TIOCB3-B/ TMRI1-B/TxD3 
TIOCB3-B, 
TMRI1-B 
⎯ 
All output 
pin 
functions 
Ο 
Port 9 
Dedicated input 
port also 
functioning as 
A/D converter 
analog inputs and 
D/A converter 
analog outputs 
P95/AN13_1/DA3 
P94/AN12_1/DA2 
⎯  ⎯  ⎯  ⎯ 










