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Rev. 1.00, 05/04, page 124 of 544
• P92/IRQ0
The pin function is switched as shown below according to the state of the P92DDR bit.
P92DDR 0 1
P92 input pin P92 output pin Pin Function
IRQ0 input pin*
Note: * When bit IRQ0E in IER is set to 1, this pin is used as the IRQ0 input pin.
• P91/IRQ1
The pin function is switched as shown below according to the state of the P91DDR bit.
P91DDR 0 1
P91 input pin P91 output pin Pin Function
IRQ1 input pin*
Note: * When bit IRQ1E in IER is set to 1, this pin is used as the IRQ1 input pin.
• P90/IRQ2/ADTRG
The pin function is switched as shown below according to the state of the P90DDR bit.
P90DDR 0 1
P90 input pin P90 output pin Pin Function
IRQ2 input pin, ADTRG input pin*
Note: * When the IRQ2E bit in IER is set to 1, this pin is used as the IRQ2 input pin. When both
bits TRGS1 and TRGS0 in ADCR of the A/D converter are set to 1, this pin is used as
the AGTRG input pin.