EXTIPSEL0=PORTA, EXTIPSEL3=PORTA, EXTIPSEL7=PORTA, EXTIPSEL5=PORTA, EXTIPSEL4=PORTA, EXTIPSEL6=PORTA, EXTIPSEL1=PORTA, EXTIPSEL2=PORTA
External Interrupt Port Select Low
| EXTIPSEL0 | External Interrupt Port Select 0 (PORTA): Port A group selected 1 (PORTB): Port B group selected 2 (PORTC): Port C group selected 3 (PORTD): Port D group selected |
| EXTIPSEL1 | External Interrupt Port Select 0 (PORTA): Port A group selected 1 (PORTB): Port B group selected 2 (PORTC): Port C group selected 3 (PORTD): Port D group selected |
| EXTIPSEL2 | External Interrupt Port Select 0 (PORTA): Port A group selected 1 (PORTB): Port B group selected 2 (PORTC): Port C group selected 3 (PORTD): Port D group selected |
| EXTIPSEL3 | External Interrupt Port Select 0 (PORTA): Port A group selected 1 (PORTB): Port B group selected 2 (PORTC): Port C group selected 3 (PORTD): Port D group selected |
| EXTIPSEL4 | External Interrupt Port Select 0 (PORTA): Port A group selected 1 (PORTB): Port B group selected 2 (PORTC): Port C group selected 3 (PORTD): Port D group selected |
| EXTIPSEL5 | External Interrupt Port Select 0 (PORTA): Port A group selected 1 (PORTB): Port B group selected 2 (PORTC): Port C group selected 3 (PORTD): Port D group selected |
| EXTIPSEL6 | External Interrupt Port Select 0 (PORTA): Port A group selected 1 (PORTB): Port B group selected 2 (PORTC): Port C group selected 3 (PORTD): Port D group selected |
| EXTIPSEL7 | External Interrupt Port Select 0 (PORTA): Port A group selected 1 (PORTB): Port B group selected 2 (PORTC): Port C group selected 3 (PORTD): Port D group selected |