Renesas H8S Series Hardware Manual page 286

Section 8 I/O Ports
• PG6/ExIRQ14/ExSDAB
The pin function is switched as shown below according to the combination of the SDA1BS
and SDA0BS bits in PTCNT1, ICE bit in ICCR of IIC_1 and IIC_0, and the PG6DDR bit.
When the ISS14 bit in ISSR16 is set to 1 and the IRQ14E bit in IER16 of the interrupt
controller is set to 1, this pin can be used as the ExIRQ14 input pin.
SDA1BS
SDA0BS
ICE_1
ICE_0
PG6DDR 0
Pin function PG6
input pin
Note: SDA1BS and SDA0BS, SDA1BS and SDA1AS, and SDA0BS and SDA0AS should not be
set to 1 at the same time. The output format for ExSDAB is NMOS open-drain output, and
direct bus drive is possible.
Rev. 3.00 Jul. 14, 2005 Page 238 of 986
REJ09B0098-0300
0
0

0

1 0
PG6 PG6
output pin input pin
1
1

1
PG6 ExSDAB
output pin (SDA1)
input/output
pin
ExIRQ14 input pin
0
1

0
0 1
PG6 PG6
input pin output pin
input/output
1

ExSDAB
(SDA0)
pin