ATmega169P datasheet(387/393 Pages) ATMEL

387 / 393 page

8018M–AVR–07/09

ATmega169P

8.6Low-frequency Crystal Oscillator .............................................................................34

8.7External Clock .........................................................................................................36

8.8Timer/Counter Oscillator ..........................................................................................37

8.9Clock Output Buffer .................................................................................................37

8.10System Clock Prescaler ........................................................................................37

8.11Register Description ..............................................................................................38

Power Management and Sleep Modes ................................................. 40

9.1Sleep Modes ............................................................................................................40

9.2Idle Mode .................................................................................................................41

9.3ADC Noise Reduction Mode ....................................................................................41

9.4Power-down Mode ...................................................................................................41

9.5Power-save Mode ....................................................................................................42

9.6Standby Mode .........................................................................................................42

9.7Power Reduction Register .......................................................................................42

9.8Minimizing Power Consumption ..............................................................................43

9.9Register Description ................................................................................................45

System Control and Reset .................................................................... 47

10.1Resetting the AVR .................................................................................................47

10.2Reset Sources .......................................................................................................47

10.3Internal Voltage Reference ....................................................................................51

10.4Watchdog Timer ....................................................................................................51

10.5Register Description ..............................................................................................54

Interrupts ................................................................................................ 56

11.1Interrupt Vectors in ATmega169P .........................................................................56

11.2Moving Interrupts Between Application and Boot Space .......................................59

External Interrupts ................................................................................. 61

12.1Pin Change Interrupt Timing ..................................................................................61

12.2Register Description ..............................................................................................62

I/O-Ports .................................................................................................. 65

13.1Overview ................................................................................................................65

13.2Ports as General Digital I/O ...................................................................................66

13.3Alternate Port Functions ........................................................................................71

13.4Register Description for I/O-Ports ..........................................................................88

8-bit Timer/Counter0 with PWM ............................................................ 91

ATmega169P Datasheet(PDF) 387 Page - ATMEL Corporation