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Section 8 I/O Ports
(5)
PG3/SCLB/ExIRQ11
The pin function is switched as shown below according to the combination of the ICE bit in ICCR
of IIC_2, the IIC2AS bit in IIC2BS of PTCNT1, and the PG3DDR bit. When the ISS11 bit in
ISSR16 is set to 1 and the IRQ11E bit in IER16 of the interrupt controller is set to 1, this pin can
be used as the ExIRQ11 input pin. SCLB_EN in the following table is expressed by the following
logical expression.
SCLB_EN = ICE·IIC2BS·IIC2AS
SCLB_EN
PG3DDR
Pin function
Note: The output format for SCLB is NMOS output only, and direct bus drive is possible. When
this pin is used as the PG3 output pin, the output format is NMOS push-pull.
(6)
PG2/SDAB/ExIRQ10
The pin function is switched as shown below according to the combination of the ICE bit in ICCR
of IIC_2, the IIC2AS bit in IIC2BS of PTCNT1, and the PG2DDR bit. When the ISS10 bit in
ISSR16 is set to 1 and the IRQ10E bit in IER16 of the interrupt controller is set to 1, this pin can
be used as the ExIRQ10 input pin. SDAB_EN in the following table is expressed by the following
logical expression.
SDAB_EN = ICE·IIC2BS·IIC2AS
SDAB_EN
PG2DDR
Pin function
Note: The output format for SDAB is NMOS output only, and direct bus drive is possible. When
this pin is used as the PG2 output pin, the output format is NMOS push-pull.
Rev. 1.00 May 09, 2008 Page 190 of 954
REJ09B0462-0100
0
0
PG3 input pin
0
0
PG2 input pin
1
PG3 output pin
ExIRQ11 input pin
1
PG2 output pin
ExIRQ10 input pin
1
SCLB I/O pin
1
SDAB I/O pin
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