ATmega644PA interrupt vectors

The 31 vectors at the start of flash, two words each (a JMP). A lower number has the higher priority; vector 0 is reset. In avr-gcc a handler is ISR(NAME_vect).

Vector	Program address	Name	Handler	Source
0	`0x0000`	RESET	reset: `main()` after start-up	External Pin,Power-on Reset,Brown-out Reset,Watchdog Reset,and JTAG AVR Reset. See Datasheet.
1	`0x0002`	INT0	`INT0_vect`	External Interrupt Request 0
2	`0x0004`	INT1	`INT1_vect`	External Interrupt Request 1
3	`0x0006`	INT2	`INT2_vect`	External Interrupt Request 2
4	`0x0008`	PCINT0	`PCINT0_vect`	Pin Change Interrupt Request 0
5	`0x000A`	PCINT1	`PCINT1_vect`	Pin Change Interrupt Request 1
6	`0x000C`	PCINT2	`PCINT2_vect`	Pin Change Interrupt Request 2
7	`0x000E`	PCINT3	`PCINT3_vect`	Pin Change Interrupt Request 3
8	`0x0010`	WDT	`WDT_vect`	Watchdog Time-out Interrupt
9	`0x0012`	TIMER2_COMPA	`TIMER2_COMPA_vect`	Timer/Counter2 Compare Match A
10	`0x0014`	TIMER2_COMPB	`TIMER2_COMPB_vect`	Timer/Counter2 Compare Match B
11	`0x0016`	TIMER2_OVF	`TIMER2_OVF_vect`	Timer/Counter2 Overflow
12	`0x0018`	TIMER1_CAPT	`TIMER1_CAPT_vect`	Timer/Counter1 Capture Event
13	`0x001A`	TIMER1_COMPA	`TIMER1_COMPA_vect`	Timer/Counter1 Compare Match A
14	`0x001C`	TIMER1_COMPB	`TIMER1_COMPB_vect`	Timer/Counter1 Compare Match B
15	`0x001E`	TIMER1_OVF	`TIMER1_OVF_vect`	Timer/Counter1 Overflow
16	`0x0020`	TIMER0_COMPA	`TIMER0_COMPA_vect`	Timer/Counter0 Compare Match A
17	`0x0022`	TIMER0_COMPB	`TIMER0_COMPB_vect`	Timer/Counter0 Compare Match B
18	`0x0024`	TIMER0_OVF	`TIMER0_OVF_vect`	Timer/Counter0 Overflow
19	`0x0026`	SPI_STC	`SPI_STC_vect`	SPI Serial Transfer Complete
20	`0x0028`	USART0_RX	`USART0_RX_vect`	USART0, Rx Complete
21	`0x002A`	USART0_UDRE	`USART0_UDRE_vect`	USART0 Data register Empty
22	`0x002C`	USART0_TX	`USART0_TX_vect`	USART0, Tx Complete
23	`0x002E`	ANALOG_COMP	`ANALOG_COMP_vect`	Analog Comparator
24	`0x0030`	ADC	`ADC_vect`	ADC Conversion Complete
25	`0x0032`	EE_READY	`EE_READY_vect`	EEPROM Ready
26	`0x0034`	TWI	`TWI_vect`	2-wire Serial Interface
27	`0x0036`	SPM_READY	`SPM_READY_vect`	Store Program Memory Read
28	`0x0038`	USART1_RX	`USART1_RX_vect`	USART1 RX complete
29	`0x003A`	USART1_UDRE	`USART1_UDRE_vect`	USART1 Data Register Empty
30	`0x003C`	USART1_TX	`USART1_TX_vect`	USART1 TX complete