Datasheet

16. Interrupts
This section describes the specifics of the interrupt handling performed by the ATmega8A. For a general
explanation of the AVR interrupt handling, refer to Reset and Interrupt Handling.
Related Links
Reset and Interrupt Handling
16.1 Interrupt Vectors in ATmega8A
Table 16-1. Reset and Interrupt Vectors
Vector No. Program
Address
(2)
Source Interrupt Definition
1 0x000
(1)
RESET External Pin, Power-on Reset, Brown-out Reset, and
Watchdog Reset
2 0x001 INT0 External Interrupt Request 0
3 0x002 INT1 External Interrupt Request 1
4 0x003 TIMER2 COMP Timer/Counter2 Compare Match
5 0x004 TIMER2 OVF Timer/Counter2 Overflow
6 0x005 TIMER1 CAPT Timer/Counter1 Capture Event
7 0x006 TIMER1 COMPA Timer/Counter1 Compare Match A
8 0x007 TIMER1 COMPB Timer/Counter1 Compare Match B
9 0x008 TIMER1 OVF Timer/Counter1 Overflow
10 0x009 TIMER0 OVF Timer/Counter0 Overflow
11 0x00A SPI, STC Serial Transfer Complete
12 0x00B USART, RXC USART, Rx Complete
13 0x00C USART, UDRE USART Data Register Empty
14 0x00D USART, TXC USART, Tx Complete
15 0x00E ADC ADC Conversion Complete
16 0x00F EE_RDY EEPROM Ready
17 0x010 ANA_COMP Analog Comparator
18 0x011 TWI Two-wire Serial Interface
19 0x012 SPM_RDY Store Program Memory Ready
Note:
1. 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.
AVR 8-Bit Microcontroller
Interrupts
© 2017 Microchip Technology Inc.
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