Datasheet

11.8. Clock Output Buffer....................................................................................................................54
11.9. Timer/Counter Oscillator.............................................................................................................55
11.10. System Clock Prescaler............................................................................................................. 55
11.11. Register Description................................................................................................................... 55
12. CFD - Clock Failure Detection mechanism............................................................. 59
12.1. Overview.................................................................................................................................... 59
12.2. Features..................................................................................................................................... 59
12.3. Operations..................................................................................................................................59
12.4. Timing Diagram.......................................................................................................................... 61
12.5. Register Description................................................................................................................... 61
13. Power Management and Sleep Modes................................................................... 63
13.1. Overview.................................................................................................................................... 63
13.2. Sleep Modes.............................................................................................................................. 63
13.3. BOD Disable...............................................................................................................................64
13.4. Idle Mode....................................................................................................................................64
13.5. ADC Noise Reduction Mode...................................................................................................... 64
13.6. Power-Down Mode.....................................................................................................................65
13.7. Power-Save Mode......................................................................................................................65
13.8. Standby Mode............................................................................................................................ 66
13.9. Extended Standby Mode............................................................................................................66
13.10. Power Reduction Registers........................................................................................................66
13.11. Minimizing Power Consumption................................................................................................. 66
13.12. Register Description...................................................................................................................68
14. System Control and Reset.......................................................................................74
14.1. Resetting the AVR...................................................................................................................... 74
14.2. Reset Sources............................................................................................................................74
14.3. Power-on Reset..........................................................................................................................75
14.4. External Reset............................................................................................................................76
14.5. Brown-out Detection...................................................................................................................76
14.6. Watchdog System Reset............................................................................................................77
14.7. Internal Voltage Reference.........................................................................................................77
14.8. Watchdog Timer......................................................................................................................... 78
14.9. Register Description................................................................................................................... 80
15. INT - Interrupts........................................................................................................ 84
15.1. Interrupt Vectors in ATmega328PB............................................................................................ 84
15.2. Register Description................................................................................................................... 85
16. EXTINT - External Interrupts................................................................................... 88
16.1. Pin Change Interrupt Timing.......................................................................................................88
16.2. Register Description................................................................................................................... 89
17. I/O-Ports.................................................................................................................. 99
17.1. Overview.................................................................................................................................... 99
17.2. Ports as General Digital I/O......................................................................................................100
ATmega328PB
© 2018 Microchip Technology Inc.
Datasheet Complete
DS40001906C-page 4