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• PC4/ETMS
Pin function
PC4 input pin
Note: When the on-chip emulator is used, this pin functions as the ETMS input pin. When no
signal is input, this pin is fixed to 1 by the internal pull-up.
• PC3/SDA3
The pin function is switched as shown below according to the combination of the ICE bit in
ICCRA of the IIC3_3 and the PC3DDR bit. When this pin is used as the PC3 output pin, the
output format is NMOS push-pull output. The output format for SDA3 is NMOS open-drain
output, and direct bus drive is possible.
ICE
PC3DDR
Pin function
PC3 input pin
• PC2/SCL3
The pin function is switched as shown below according to the combination of the ICE bit in
ICCRA of the IIC3_3 and the PC2DDR bit. When this pin is used as the PC2 output pin, the
output format is NMOS push-pull output. The output format for SCL3 is NMOS open-drain
output, and direct bus drive is possible.
ICE
PC2DDR
Pin function
PC2 input pin
• PC1/SDA2
The pin function is switched as shown below according to the combination of the ICE bit in
ICCRA of the IIC3_2 and the PC1DDR bit. When this pin is used as the PC1 output pin, the
output format is NMOS push-pull output. The output format for SDA2 is NMOS open-drain
output, and direct bus drive is possible.
ICE
PC1DDR
Pin function
PC1 input pin
Rev. 1.00, 09/03, page 212 of 704
0
0
PC3 output pin
0
0
PC2 output pin
0
0
PC1 output pin
1
1
1
1
SDA3 I/O pin
1
SCL3 I/O pin
1
SDA2 I/O pin
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