atmega3250v-8auatmega325v-8ai ATMEL Corporation, atmega3250v-8auatmega325v-8ai Datasheet - Page 356

• Manufacturer Part Number: atmega3250v-8auatmega325v-8ai
• Description: Atmega3250 8-bit Microcontroller With In-system Programmable Flash
• Manufacturer: ATMEL Corporation

10 Power Management and Sleep Modes ................................................. 34
11 System Control and Reset .................................................................... 40
12 Interrupts ................................................................................................ 48
13 External Interrupts ................................................................................. 54
14 I/O-Ports .................................................................................................. 59
ii
9.6
9.7
9.8
9.9
9.10
10.1
10.2
10.3
10.4
10.5
10.6
10.7
10.8
10.9
11.1
11.2
11.3
11.4
11.5
11.6
11.7
11.8
11.9
11.10
12.1
12.2
12.3
13.1
13.2
ATmega325/3250/645/6450
External Clock .................................................................................................29
Clock Output Buffer .........................................................................................30
Timer/Counter Oscillator ..................................................................................30
System Clock Prescaler ..................................................................................31
Register Description ........................................................................................31
Sleep Modes ....................................................................................................34
Idle Mode .........................................................................................................34
ADC Noise Reduction Mode ............................................................................35
Power-down Mode ...........................................................................................35
Power-save Mode ............................................................................................35
Standby Mode .................................................................................................36
Power Reduction Register ...............................................................................36
Minimizing Power Consumption ......................................................................36
Register Description ........................................................................................38
Resetting the AVR ...........................................................................................40
Reset Sources .................................................................................................40
Power-on Reset ...............................................................................................41
External Reset .................................................................................................42
Brown-out Detection ........................................................................................42
Watchdog Reset ..............................................................................................43
Internal Voltage Reference ..............................................................................43
Watchdog Timer ..............................................................................................44
Timed Sequences for Changing the Configuration of the Watchdog Timer ....45
Register Description ........................................................................................46
Interrupt Vectors in ATmega325/3250/645/6450 .............................................48
Moving Interrupts Between Application and Boot Space .................................52
Register Description ........................................................................................52
Pin Change Interrupt Timing ............................................................................54
Register Description ........................................................................................55
2570L–AVR–08/07