Renesas H8S Series Hardware Manual page 287

• PG5/ExIRQ13/ExSCLA
The pin function is switched as shown below according to the combination of the SCL1AS
and SCL0AS bits in PTCNT1, ICE bit in ICCR of IIC_1 and IIC_0, and the PG5DDR bit.
When the ISS13 bit in ISSR16 is set to 1 and the IRQ13E bit in IER16 of the interrupt
controller is set to 1, this pin can be used as the ExIRQ13 input pin.
SCL1AS
SCL0AS
ICE_1
ICE_0
PG5DDR 0
Pin function PG5
input pin
Note: SCL1AS and SCL0AS, SCL1AS and SCL1BS, and SCL0AS and SCL0BS should not be set
to 1 at the same time. The output format for ExSCLA is NMOS open-drain output, and direct
bus drive is possible.
0
0

0

1 0
PG5 PG5
output pin input pin
1
1

1
PG5 ExSCLA
output pin (SCL1)
input/output
pin
ExIRQ13 input pin
Rev. 3.00 Jul. 14, 2005 Page 239 of 986
Section 8 I/O Ports
0
1

0
0 1
PG5 PG5
input pin output pin
REJ09B0098-0300
1

ExSCLA
(SCL0)
input/output
pin