Attiny85 и прерывания

  PCMSK = 0b00000100; //turn on interrupts on pins PB2
  //PCMSK = 0b00101010; //turn on interrupts on pins PB1,PB3,PB5
  GIMSK |= 0b00100000;  // enable PCINT interrupt
  sei();                // enable all interrupts
  ssd1306_init();       // initialise the screen

attachInterrupt(0, yourControl, CHANGE);

// PB0 pin button interrupt
ISR(PCINT0_vect) { // for power down deep sleep
  //if (PINB & (1 << PINB2)) {return;}
  if (keyLock == 0) { 
    keyLock = 6; // Nothing complicated to do here - this is picked up in the handleInput() function
  }
}

void system_sleep() {
  ssd1306_fillscreen(0x00);
  ssd1306_send_command(0xAE);          // display off
  cbi(ADCSRA, ADEN);                   // switch Analog to DigitalconVERTDRAWer OFF
  set_sleep_mode(SLEEP_MODE_PWR_DOWN); // sleep mode is set here
  sleep_enable();
  sleep_mode();                        // System actually sleeps here
  sleep_disable();                     // System continues execution here when watchdog timed out
  sbi(ADCSRA, ADEN);                   // switch Analog to DigitalconVERTDRAWer ON
  ssd1306_send_command(0xAF);          // --turn on oled panel
}