Datasheet

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8025M–AVR–6/11
ATmega48P/88P/168P
13.1Pin Change Interrupt Timing .................................................................................68
13.2Register Description ..............................................................................................69
14 I/O-Ports .................................................................................................. 73
14.1Overview ...............................................................................................................73
14.2Ports as General Digital I/O ...................................................................................74
14.3Alternate Port Functions ........................................................................................78
14.4Register Description ..............................................................................................90
15 8-bit Timer/Counter0 with PWM ............................................................ 92
15.1Features ................................................................................................................92
15.2Overview ...............................................................................................................92
15.3Timer/Counter Clock Sources ...............................................................................94
15.4Counter Unit ..........................................................................................................94
15.5Output Compare Unit ............................................................................................95
15.6Compare Match Output Unit ..................................................................................96
15.7Modes of Operation ...............................................................................................97
15.8Timer/Counter Timing Diagrams .........................................................................102
15.9Register Description ............................................................................................104
16 16-bit Timer/Counter1 with PWM ........................................................ 111
16.1Features ..............................................................................................................111
16.2Overview .............................................................................................................111
16.3Accessing 16-bit Registers ..................................................................................113
16.4Timer/Counter Clock Sources .............................................................................116
16.5Counter Unit ........................................................................................................117
16.6Input Capture Unit ...............................................................................................118
16.7Output Compare Units .........................................................................................120
16.8Compare Match Output Unit ................................................................................122
16.9Modes of Operation .............................................................................................123
16.10Timer/Counter Timing Diagrams .......................................................................130
16.11Register Description ..........................................................................................132
17 Timer/Counter0 and Timer/Counter1 Prescalers .............................. 139
17.1Internal Clock Source ..........................................................................................139
17.2Prescaler Reset ...................................................................................................139
17.3External Clock Source .........................................................................................139
17.4Register Description ............................................................................................141