Datasheet

Rev. 3.00, 03/04, page 202 of 830
• P54/IRQ12/TxD2
The pin function is switched as shown below according to the combination of the TE bit in
SCR of SCI_2 and the P54DDR bit.
When the ISS12 bit in ISSR16 is cleared to 0 and the IRQ12E bit in IER16 of the interrupt
controller is set to 1 this pin can be used as the IRQ12 input pin. To use this pin as the IRQ12
input pin, clear the P54DDR bit to 0.
TE 0 1
P54DDR 0 1 
P54 input pin Pin function
IRQ12 input pin
P54 output pin TxD2 output pin
• 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 ISS11 bit in ISSR16 is cleared to 0 and the IRQ11E bit in IER16 of the interrupt
controller is set to 1, 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 0 1
P53DDR 0 1 
P53 input pin Pin function
IRQ11 input pin
P53 output pin RxD1/IrRxD input pin
• 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 ISS10 bit in ISSR16 is cleared to 0 and the IRQ10E bit in IER16 of the interrupt
controller is set to 1, 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 0 1
P52DDR 0 1 
P52 input pin Pin function
IRQ10 input pin
P52 output pin TxD1/IrTxD output pin