ATmega48/88/168
0xC1B
0xC1C
out
ldi
SPH,r16
; Set Stack Pointer to top of RAM
r16,low(RAMEND)
SPL,r16
0xC1D
0xC1E
out
sei
; Enable interrupts
0xC1F
<instr> xxx
9.3
Interrupt Vectors in ATmega168
Table 9-4.
Reset and Interrupt Vectors in ATmega168
Program
VectorNo.
Address(2)
0x0000(1)
0x0002
0x0004
0x0006
0x0008
0x000A
0x000C
0x000E
0x0010
0x0012
0x0014
0x0016
0x0018
0x001A
0x001C
0x001E
0x0020
0x0022
0x0024
0x0026
0x0028
0x002A
0x002C
0x002E
0x0030
0x0032
Source
Interrupt Definition
External Pin, Power-on Reset, Brown-out Reset and Watchdog System Reset
External Interrupt Request 0
External Interrupt Request 1
Pin Change Interrupt Request 0
Pin Change Interrupt Request 1
Pin Change Interrupt Request 2
Watchdog Time-out Interrupt
Timer/Counter2 Compare Match A
Timer/Counter2 Compare Match B
Timer/Counter2 Overflow
1
RESET
2
INT0
3
INT1
4
PCINT0
5
PCINT1
6
PCINT2
7
WDT
8
TIMER2 COMPA
TIMER2 COMPB
TIMER2 OVF
TIMER1 CAPT
TIMER1 COMPA
TIMER1 COMPB
TIMER1 OVF
TIMER0 COMPA
TIMER0 COMPB
TIMER0 OVF
SPI, STC
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
Timer/Counter1 Capture Event
Timer/Counter1 Compare Match A
Timer/Coutner1 Compare Match B
Timer/Counter1 Overflow
Timer/Counter0 Compare Match A
Timer/Counter0 Compare Match B
Timer/Counter0 Overflow
SPI Serial Transfer Complete
USART Rx Complete
USART, RX
USART, UDRE
USART, TX
ADC
USART, Data Register Empty
USART, Tx Complete
ADC Conversion Complete
EE READY
ANALOG COMP
TWI
EEPROM Ready
Analog Comparator
2-wire Serial Interface
SPM READY
Store Program Memory Ready
Notes: 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, ATmega88 and
ATmega168” on page 264.
59
2545E–AVR–02/05
MICROCHIP [ MICROCHIP ]
