3.5.1 Interrupt Vectors in ATmega640/1280/1281/2560/2561

A clarification for the source names of the Interrupt vectors has been made to comply with the header file naming convention.

Table 3-3. Reset and Interrupt Vectors in ATmega640/1280/1281/2560/2561
Vector No	Program Address⁽²⁾	Source	Interrupts definition
1	0x0000⁽¹⁾	RESET	External pin, Power-on Reset, Brown-out Reset, Watchdog Reset and JTAG AVR Reset.
2	0x0002	INT0	External Interrupt Request 0
3	0x0004	INT1	External Interrupt Request 1
4	0x0006	INT2	External Interrupt Request 2
5	0x0008	INT3	External Interrupt Request 3
6	0x000A	INT4	External Interrupt Request 4
7	0x000C	INT5	External Interrupt Request 5
8	0x000E	INT6	External Interrupt Request 6
8	0x0010	INT7	External Interrupt Request 7
9	0x0012	PCINT0	Pin Change Interrupt Request 0
10	0x0014	PCINT1	Pin Change Interrupt Request 1
11	0x0016⁽³⁾	PCINT2	Pin Change Interrupt Request 2
12	0x0018	WDT	Watchdog Time-out Interrupt
13	0x001A	TIMER2_COMPA	Timer/Counter2 Compare Match A
14	0x001C	TIMER2_COMPB	Timer/Counter2 Compare Match B
15	0x001E	TIMER2_OVF	Timer/Counter2 Overflow
16	0x0020	TIMER1_CAPT	Timer/Counter1 Capture Event
17	0x0022	TIMER1_COMPA	Timer/Counter1 Compare Match A
18	0x0024	TIMER1_COMPB	Timer/Counter1 Compare Match B
19	0x0026	TIMER1_COMPC	Timer/Counter1 Compare Match C
20	0x0028	TIMER1_OVF	Timer/Counter1 Overflow
21	0x002A	TIMER0_COMPA	Timer/Counter0 Compare Match A
22	0x002C	TIMER0_COMPB	Timer/Counter0 Compare Match B
23	0x002E	TIMER0_OVF	Timer/Counter0 Overflow
24	0x0030	SPI_STC	SPI Serial Transfer Complete
25	0x0032	USART0_RX	USART0 Receive complete
26	0x0034	USART0_UDRE	USART0 Data Register Empty
27	0x0036	USART0_TX	USART0 Transmit complete
28	0x0038	ANALOG_COMP	Analog Comparator
30	0x003A	ADC	ADC Conversion complete
31	0x003C	EE_READY	EEPROM Ready
32	0x003E	TIMER3_CAPT	Timer/Counter3 Capture Event
33	0x0040	TIMER3_COMPA	Timer/Counter3 Compare Match A
34	0x0042	TIMER3_COMPB	Timer/Counter3 Compare Match B
35	0x0044	TIMER3_COMPC	Timer/Counter3 Compare Match C
36	0x0046	TIMER3_OVF	Timer/Counter3 Overflow
37	0x0048	USART1_RX	USART1 Receive complete
38	0x004A	USART1_UDRE	USART1 Data Register Empty
39	0x004C	USART1_TX	USART1 Transmit complete
40	0x004E	TWI	2-Wire Serial Interface
41	0x0050	SPM_READY	Store Program Memory Ready
42	0x0052⁽³⁾	TIMER4_CAPT	Timer/Counter4 Capture Event
43	0x0054	TIMER4_COMPA	Timer/Counter4 Compare Match A
44	0x0056	TIMER4_COMPB	Timer/Counter4 Compare Match B
45	0x0058	TIMER4_COMPC	Timer/Counter4 Compare Match C
46	0x005A	TIMER4_OVF	Timer/Counter4 Overflow
47	0x005C⁽³⁾	TIMER5_CAPT	Timer/Counter5 Capture Event
48	0x005E	TIMER5_COMPA	Timer/Counter5 Compare Match A
49	0x0060	TIMER5_COMPB	Timer/Counter5 Compare Match B
50	0x0062	TIMER5_COMPC	Timer/Counter5 Compare Match C
51	0x0064	TIMER5_OVF	Timer/Counter5 Overflow
52	0x0066⁽³⁾	USART2_RX	USART2 Receive complete
53	0x0068⁽³⁾	USART2_UDRE	USART2 Data Register Empty
54	0x006A⁽³⁾	USART2_TX	USART2 Transmit complete
55	0x006C⁽³⁾	USART3_RX	USART3 Receive complete
56	0x006E⁽³⁾	USART3_UDRE	USART3 Data Register Empty
57	0x0070⁽³⁾	USART3_TX	USART3 Transmit complete

Note:

When the BOOTRST fuse is programmed, the device will jump to the boot loader address at Reset. See “Boot Loader Support – Read-While-Write Self- Programming”.
When setting the IVSEL bit in MCUCR, Interrupt Vectors will be moved to the start of the boot Flash section. The address of each Interrupt Vector will then be the address in this table added to the start address of the boot Flash section.
Only available in ATmega640/1280/2560.