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ICE
P82DDR
Pin function
• P81/ExIRQ9/SDA0
The pin function is switched as shown below according to the combination of the ICE bit in
ICCR of IIC_0 and the P81DDR bit.
When the ISS9 bit in ISSR16 of the interrupt controller is set to 1, this pin can be used as the
ExIRQ9 input pin. To use this pin as the ExIRQ9 input pin, clear the P81DDR bit to 0.
When this pin is used as the P81 output pin, the output format is NMOS push-pull output. The
output format for SDA0 is NMOS open-drain output, and direct bus drive is possible.
ICE
P81DDR
Pin function
• 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
P82 input pin
0
0
P81 input pin
0
0
P80 input pin
1
P82 output pin
ExIRQ10 input pin
1
P81 output pin
ExIRQ9 input pin
1
P80 output pin
ExIRQ8 input pin
Rev. 3.00 Jan 25, 2006 page 249 of 872
Section 9 I/O Ports
1
—
SCL1 input/output pin
1
—
SDA0 input/output pin
1
—
SCL0 input/output pin
REJ09B0286-0300
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