HD64F2168 Datasheet, PDF (261/874 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer

• P80/ExIRQ8/SCL0
The pin function is switched as shown below according to the combination of the ICE bit in
ICCR of IIC_0 and the P80DDR bit.
When the ISS8 bit in ISSR16 of the interrupt controller is set to 1, this pin can be used as the
ExIRQ8 input pin. To use this pin as the ExIRQ8 input pin, clear the P80DDR bit to 0.
When this pin is used as the P80 output pin, the output format is NMOS push-pull output. The
output format for SCL0 is NMOS open-drain output, and direct bus drive is possible.
ICE
P80DDR
Pin function
0
0
P80 input pin
ExIRQ8 input pin
1
P80 output pin
1

SCL0 input/output pin
Rev. 3.00, 03/04, page 221 of 830