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• P53/IRQ11/RxD1/IrRxD
The pin function is switched as shown below according to the combination of the RE bit in
SCR of SCI_1 and the P53DDR bit.
When the IRQ11E bit in IER16 of the interrupt controller is set to 1 or the ISS11 bit in ISSR16
is cleared to 0, this pin can be used as the IRQ11 input pin. To use this pin as the IRQ11 input
pin, clear the P53DDR bit to 0.
RE
P53DDR
Pin function
• P52/IRQ10/TxD1/IrTxD
The pin function is switched as shown below according to the combination of the TE bit in
SCR of SCI_1 and the P52DDR bit.
When the IRQ10E bit in IER16 of the interrupt controller is set to 1 or the ISS10 bit in ISSR16
is cleared to 0, this pin can be used as the IRQ10 input pin. To use this pin as the IRQ10 input
pin, clear the P52DDR bit to 0.
TE
P52DDR
Pin function
• P51/IRQ9/RxD0
The pin function is switched as shown below according to the combination of the RE bit in
SCR of SCI_0 and the P51DDR bit.
When the IRQ9E bit in IER16 of the interrupt controller is set to 1 or the ISS9 bit in ISSR16 is
cleared to 0, this pin can be used as the IRQ9 input pin. To use this pin as the IRQ9 input pin,
clear the P51DDR bit to 0.
RE
P51DDR
Pin function
0
0
P53 input pin
0
0
P52 input pin
0
0
P51 input pin
1
P53 output pin
IRQ11 input pin
1
P52 output pin
IRQ10 input pin
1
P51 output pin
IRQ9 input pin
Rev. 3.00 Jan 25, 2006 page 231 of 872
Section 9 I/O Ports
1
—
RxD1/IrRxD input pin
1
—
TxD1/IrTxD output pin
1
—
RxD0 input pin
REJ09B0286-0300
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