Rainbow Electronics ATmega64M1 - Manual (Page 337)

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8209A–AVR–08/09
ATmega16M1/32M1/64M1
9.5 Calibrated Internal RC Oscillator .....................................................................31
9.6 PLL ..................................................................................................................32
9.7 128 kHz Internal Oscillator ..............................................................................33
9.8 External Clock .................................................................................................33
9.9 Clock Output Buffer .........................................................................................34
9.10 System Clock Prescaler ..................................................................................34
9.11 Register Description ........................................................................................35
10 Power Management and Sleep Modes ................................................. 38
10.1 Overview ..........................................................................................................38
10.2 Sleep Modes ....................................................................................................38
10.3 Idle Mode .........................................................................................................38
10.4 ADC Noise Reduction Mode ............................................................................39
10.5 Power-down Mode ...........................................................................................39
10.6 Standby Mode .................................................................................................39
10.7 Power Reduction Register ...............................................................................39
10.8 Minimizing Power Consumption ......................................................................40
10.9 Register Description ........................................................................................41
11 System Control and Reset .................................................................... 43
11.1 Resetting the AVR ...........................................................................................43
11.2 Reset Sources .................................................................................................43
11.3 Internal Voltage Reference ..............................................................................46
11.4 Watchdog Timer ..............................................................................................47
11.5 Register Description ........................................................................................51
12 Interrupts ................................................................................................ 54
12.1 Interrupt Vectors in ATmega16M1/32M1/64M1 ...............................................54
12.2 Register Description ........................................................................................58
13 External Interrupts ................................................................................. 60
13.1 Pin Change Interrupt Timing ............................................................................60
13.2 Register Description ........................................................................................61
14 I/O-Ports .................................................................................................. 65
14.1 Overview ..........................................................................................................65
14.2 Ports as General Digital I/O .............................................................................66
14.3 Alternate Port Functions ..................................................................................70
14.4 Register Description ........................................................................................84