Datasheet
Section 10 I/O Ports 
Page 516 of 1384    R01UH0310EJ0500 Rev. 5.00 
 Sep 25, 2012 
H8S/2426, H8S/2426R, H8S/2424 Group
Table 10.2  Port Functions of 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
P17/PO15/TIOCB2/TCLKD/SCS0-A 
P17, 
TIOCB2, 
TCLKD 
P16/PO14/TIOCA2/SSCK0-A 
P16, 
TIOCA2 
P15/DACK1/PO13/TIOCB1/TCLKC/SSI0-A 
P15, 
TIOCB1 
P14/DACK0/PO12/TIOCA1/SSO0-A 
P14, 
TIOCA1 
P13/TEND1/PO11/TIOCD0/TCLKB 
All input pin 
functions 
P12/TEND0/PO10/TIOCC0/TCLKA 
All input pin 
functions 
P11/DREQ1/PO9/TIOCB0 
All input pin 
functions 
Port 1 
General I/O port 
also functioning 
as PPG outputs, 
TPU I/Os, 
DMAC I/Os, and 
SSU I/Os 
P10/DREQ0/PO8/TIOCA0 
All input pin 
functions 
⎯ 
All output 
pin 
functions 
⎯ 
P27/PO7/TIOCB5/SCL2 
All input pin 
functions 
P26/PO6/TIOCA5/SDA2/ADTRG1 
P26, 
TIOCA5, 
SDA2 
P25/WAIT-B/PO5-A/TIOCB4-A/TMO1-A 
P25/PO5-A/ 
TIOCB4-A/ 
TMO1-A 
P25, 
TIOCB4-A 
P24/PO4-A/TIOCA4-A/TMO0-A/RxD4-A 
P24, 
TIOCA4-A 
P23/PO3-A/TIOCD3-A/TMCI1-A/TxD4-A 
P22/PO2-A/TIOCC3-A/TMCI0-A 
P21/PO1-A/TIOCB3-A/TMRI1-A 
Port 2 
General I/O port 
also functioning 
as PPG outputs, 
TPU I/Os, SCI 
I/Os, 
TMR I/Os, I
2
C 
I/Os, 
A/D converter 
inputs, and bus 
control signal 
I/Os 
P20/PO0-A/TIOCA3-A/TMRI0 
All input pin 
functions 
⎯ 
All output 
pin 
functions 
O 
P35/OE-B*
1
/SCK1/SCL0 
P35/SCK1/ 
SCL0 
SCL0 
All output 
pin 
functions 
other than 
OE-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 
⎯ 










