ATmega328P datasheet(443/448 Pages) ATMEL

443 / 448 page

iii

8161D–AVR–10/09

ATmega48PA/88PA/168PA/328P

12.1Pin Change Interrupt Timing .................................................................................70

12.2Register Description ..............................................................................................71

I/O-Ports .................................................................................................. 75

13.1Overview ...............................................................................................................75

13.2Ports as General Digital I/O ...................................................................................76

13.3Alternate Port Functions ........................................................................................80

13.4Register Description ..............................................................................................92

8-bit Timer/Counter0 with PWM ............................................................ 94

14.1Features ................................................................................................................94

14.2Overview ...............................................................................................................94

14.3Timer/Counter Clock Sources ...............................................................................96

14.4Counter Unit ..........................................................................................................96

14.5Output Compare Unit ............................................................................................97

14.6Compare Match Output Unit ..................................................................................98

14.7Modes of Operation ...............................................................................................99

14.8Timer/Counter Timing Diagrams .........................................................................104

14.9Register Description ............................................................................................106

16-bit Timer/Counter1 with PWM ........................................................ 113

15.1Features ..............................................................................................................113

15.2Overview .............................................................................................................113

15.3Accessing 16-bit Registers ..................................................................................115

15.4Timer/Counter Clock Sources .............................................................................118

15.5Counter Unit ........................................................................................................119

15.6Input Capture Unit ...............................................................................................120

15.7Output Compare Units .........................................................................................122

15.8Compare Match Output Unit ................................................................................124

15.9Modes of Operation .............................................................................................125

15.10Timer/Counter Timing Diagrams .......................................................................132

15.11Register Description ..........................................................................................134

Timer/Counter0 and Timer/Counter1 Prescalers .............................. 141

16.1Internal Clock Source ..........................................................................................141

16.2Prescaler Reset ...................................................................................................141

16.3External Clock Source .........................................................................................141

16.4Register Description ............................................................................................143

ATmega328P Datasheet(PDF) 443 Page - ATMEL Corporation