Datasheet
Section 10 I/O Ports 
R01UH0310EJ0500 Rev. 5.00    Page 509 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*
3
Input Pull-
up MOS 
Capability 
Open Drain 
Output 
Capability 
5-V 
Tolerance*
2
P35/OE-B*
2
/CKE-B*
1
/SCK1/SCL0 
P35/SCK1/ 
SCL0 
SCL0 
All output 
pin 
functions 
other than 
OE-B*
2
 and 
CKE-B*
1
P34/SCK0/SCK4-A/SDA0 SDA0 
P33/RxD1/SCL1 SCL1 
P32/RxD0/IrRxD/SDA1 SDA1 
O 
P31/TxD1  ⎯  ⎯ 
Port 3 
General I/O port 
also functioning 
as SCI I/Os, I
2
C 
I/Os, and bus 
control signal 
I/Os 
P30/TxD0/IrTxD  ⎯ 
⎯ 
All output 
pin 
functions 
⎯ 
Port 4 
General I/O port 
also functioning 
as A/D converter 
analog inputs 
P47/AN7_0 
P46/AN6_0 
P45/AN5_0 
P44/AN4_0 
P43/AN3_0 
P42/AN2_0 
P41/AN1_0 
P40/AN0_0 
⎯  ⎯  ⎯  ⎯ 










