DDRA &= ~(_BV(PA3) | _BV(PA4)); // set as input
PORTA |= _BV(PA3) | _BV(PA4); // enable internal pull-ups
DDRA &= ~(_BV(PA3) | _BV(PA4)); // set as input
PORTA |= _BV(PA3) | _BV(PA4); // enable internal pull-ups
PCMSK0 = _BV(PCINT3) | _BV(PCINT4);
// disable pin-change IRQs on all pins except PA3,PA4
PCMSK0 = _BV(PCINT3) | _BV(PCINT4);
// disable pin-change IRQs on all pins except PA3,PA4