60
2467S–AVR–07/09
ATmega128
Interrupts This section describes the specifics of the interrupt handling as performed in ATmega128. For a
general explanation of the AVR interrupt handling, refer to “Reset and Interrupt Handling” on
page 15.
Interrupt Vectors
in ATmega128
Table 23. Reset and Interrupt Vectors
Vector
No.
Program
Address
(2)
Source Interrupt Definition
1 $0000
(1)
RESET
External Pin, Power-on Reset, Brown-out Reset,
Watchdog Reset, and JTAG AVR Reset
2 $0002 INT0 External Interrupt Request 0
3 $0004 INT1 External Interrupt Request 1
4 $0006 INT2 External Interrupt Request 2
5 $0008 INT3 External Interrupt Request 3
6 $000A INT4 External Interrupt Request 4
7 $000C INT5 External Interrupt Request 5
8 $000E INT6 External Interrupt Request 6
9 $0010 INT7 External Interrupt Request 7
10 $0012 TIMER2 COMP Timer/Counter2 Compare Match
11 $0014 TIMER2 OVF Timer/Counter2 Overflow
12 $0016 TIMER1 CAPT Timer/Counter1 Capture Event
13 $0018 TIMER1 COMPA Timer/Counter1 Compare Match A
14 $001A TIMER1 COMPB Timer/Counter1 Compare Match B
15 $001C TIMER1 OVF Timer/Counter1 Overflow
16 $001E TIMER0 COMP Timer/Counter0 Compare Match
17 $0020 TIMER0 OVF Timer/Counter0 Overflow
18 $0022 SPI, STC SPI Serial Transfer Complete
19 $0024 USART0, RX USART0, Rx Complete
20 $0026 USART0, UDRE USART0 Data Register Empty
21 $0028 USART0, TX USART0, Tx Complete
22 $002A ADC ADC Conversion Complete
23 $002C EE READY EEPROM Ready
24 $002E ANALOG COMP Analog Comparator
25 $0030
(3)
TIMER1 COMPC Timer/Countre1 Compare Match C
26 $0032
(3)
TIMER3 CAPT Timer/Counter3 Capture Event
27 $0034
(3)
TIMER3 COMPA Timer/Counter3 Compare Match A
28 $0036
(3)
TIMER3 COMPB Timer/Counter3 Compare Match B
29 $0038
(3)
TIMER3 COMPC Timer/Counter3 Compare Match C
30 $003A
(3)
TIMER3 OVF Timer/Counter3 Overflow
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