55
7530J–AVR–03/12
Atmel ATmega48/88/168 Automotive
Notes:
1. When the BOOTRST Fuse is programmed, the device will jump to the Boot Loader address at
2. When the IVSEL bit in MCUCR is set, 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.
Table 9-3 shows reset and Interrupt Vectors placement for the various combinations of
BOOTRST and IVSEL settings. If the program never enables an interrupt source, the Interrupt
Vectors are not used, and regular program code can be placed at these locations. This is also
the case if the Reset Vector is in the Application section while the Interrupt Vectors are in the
Boot section or vice versa.
5
0x004
PCINT1
Pin Change Interrupt Request 1
6
0x005
PCINT2
Pin Change Interrupt Request 2
7
0x006
WDT
Watchdog Time-out Interrupt
80x007
TIMER2
COMPA
Timer/Counter2 Compare Match A
90x008
TIMER2
COMPB
Timer/Counter2 Compare Match B
10
0x009
TIMER2 OVF
Timer/Counter2 Overflow
11
0x00A
TIMER1 CAPT
Timer/Counter1 Capture Event
12
0x00B
TIMER1
COMPA
Timer/Counter1 Compare Match A
13
0x00C
TIMER1
COMPB
Timer/Coutner1 Compare Match B
14
0x00D
TIMER1 OVF
Timer/Counter1 Overflow
15
0x00E
TIMER0
COMPA
Timer/Counter0 Compare Match A
16
0x00F
TIMER0
COMPB
Timer/Counter0 Compare Match B
17
0x010
TIMER0 OVF
Timer/Counter0 Overflow
18
0x011
SPI, STC
SPI Serial Transfer Complete
19
0x012
USART, RX
USART Rx Complete
20
0x013
USART, UDRE
USART, Data Register Empty
21
0x014
USART, TX
USART, Tx Complete
22
0x015
ADC
ADC Conversion Complete
23
0x016
EE READY
EEPROM Ready
24
0x017
ANALOG
COMP
Analog Comparator
25
0x018
TWI
2-wire Serial Interface
26
0x019
SPM READY
Store Program Memory Ready
Table 9-2.
Reset and Interrupt Vectors in ATmega88
Vector
No.
Program
Address(2)
Source
Interrupt Definition