ATmega644PA datasheet(463/468 Pages) ATMEL

463 / 468 page

iii

8152G–AVR–11/09

ATmega164PA/324PA/644PA/1284P

I/O-Ports .................................................................................................. 74

13.1Overview ...............................................................................................................74

13.2Ports as General Digital I/O ...................................................................................75

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

13.4Register Description ..............................................................................................93

8-bit Timer/Counter0 with PWM ............................................................ 95

14.1Features ................................................................................................................95

14.2Overview ...............................................................................................................95

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

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

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

14.6Compare Match Output Unit ..................................................................................99

14.7Modes of Operation .............................................................................................100

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

8-bit Timer/Counter2 with PWM and Asynchronous Operation ...... 141

16.1Features ..............................................................................................................141

16.2Overview .............................................................................................................141

16.3Timer/Counter Clock Sources .............................................................................142

16.4Counter Unit ........................................................................................................143

16.5Output Compare Unit ..........................................................................................143

16.6Compare Match Output Unit ................................................................................145

16.7Modes of Operation .............................................................................................146

ATmega644PA Datasheet(PDF) 463 Page - ATMEL Corporation