Rainbow Electronics ATmega3290P_V - Manual (Page 370)

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ATmega329/3290/649/6490
2552H–AVR–11/06
Idle Mode ............................................................................................................ 34
ADC Noise Reduction Mode............................................................................... 34
Power-down Mode.............................................................................................. 34
Power-save Mode............................................................................................... 34
Standby Mode..................................................................................................... 35
Power Reduction Register .................................................................................. 35
Minimizing Power Consumption ......................................................................... 36
Register Description ........................................................................................... 38
System Control and Reset ................................................................ 40
Internal Voltage Reference ................................................................................. 45
Watchdog Timer ................................................................................................. 45
Timed Sequences for Changing the Configuration of the Watchdog Timer ....... 48
Interrupts ............................................................................................ 49
Interrupt Vectors in ATmega329/3290/649/6490................................................ 49
External Interrupts ............................................................................. 54
Pin Change Interrupt Timing............................................................................... 54
I/O-Ports.............................................................................................. 59
Introduction ......................................................................................................... 59
Ports as General Digital I/O ................................................................................ 60
Alternate Port Functions ..................................................................................... 65
Register Description for I/O-Ports....................................................................... 86
8-bit Timer/Counter0 with PWM........................................................ 89
Overview............................................................................................................. 89
Timer/Counter Clock Sources............................................................................. 90
Counter Unit........................................................................................................ 90
Output Compare Unit.......................................................................................... 91
Compare Match Output Unit ............................................................................... 92
Modes of Operation ............................................................................................ 94
Timer/Counter Timing Diagrams......................................................................... 98
8-bit Timer/Counter Register Description ........................................................... 99
Timer/Counter0 and Timer/Counter1 Prescalers .......................... 103
16-bit Timer/Counter1...................................................................... 105
Overview........................................................................................................... 105
Accessing 16-bit Registers ............................................................................... 108
Timer/Counter Clock Sources........................................................................... 111
Counter Unit...................................................................................................... 111
Input Capture Unit............................................................................................. 112
Output Compare Units ...................................................................................... 114
Compare Match Output Unit ............................................................................. 116