ATMEGA640 datasheet(431/436 Pages) MICROCHIP

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ATmega640/V-1280/V-1281/V-2560/V-2561/V [DATASHEET]

2549Q–AVR–02/2014

14.2Reset and Interrupt Vector placement .................................................................102

14.3Moving Interrupts Between Application and Boot Section ...................................107

14.4Register Description ............................................................................................108

15 External Interrupts ............................................................................... 109

15.1Pin Change Interrupt Timing ................................................................................109

15.2Register Description ............................................................................................110

16 8-bit Timer/Counter0 with PWM .......................................................... 115

16.1Features ..............................................................................................................115

16.2Overview ..............................................................................................................115

16.3Timer/Counter Clock Sources .............................................................................116

16.4Counter Unit ........................................................................................................116

16.5Output Compare Unit ...........................................................................................117

16.6Compare Match Output Unit ................................................................................119

16.7Modes of Operation .............................................................................................120

16.8Timer/Counter Timing Diagrams .........................................................................124

16.9Register Description ............................................................................................126

17 16-bit Timer/Counter (Timer/Counter 1, 3, 4, and 5) .......................... 133

17.1Features ..............................................................................................................133

17.2Overview ..............................................................................................................133

17.3Accessing 16-bit Registers ..................................................................................135

17.4Timer/Counter Clock Sources .............................................................................138

17.5Counter Unit ........................................................................................................139

17.6Input Capture Unit ...............................................................................................140

17.7Output Compare Units .........................................................................................141

17.8Compare Match Output Unit ................................................................................143

17.9Modes of Operation .............................................................................................144

17.10Timer/Counter Timing Diagrams .......................................................................152

17.11Register Description ..........................................................................................154

18 Timer/Counter 0, 1, 3, 4, and 5 Prescaler ........................................... 164

18.1Internal Clock Source ..........................................................................................164

18.2Prescaler Reset ...................................................................................................164

18.3External Clock Source .........................................................................................164

18.4Register Description ............................................................................................166

19 Output Compare Modulator (OCM1C0A) ............................................ 167

19.1Overview ..............................................................................................................167

ATMEGA640 Datasheet(PDF) 431 Page - Microchip Technology