ATmega328P datasheet(59/448 Pages) ATMEL

59 / 448 page

8161D–AVR–10/09

ATmega48PA/88PA/168PA/328P

11.2

Interrupt Vectors in ATmega88PA

Notes:

1. When the BOOTRST Fuse is programmed, the device will jump to the Boot Loader address at reset, see ”Boot Loader Sup-

port – Read-While-Write Self-Programming, ATmega88PA, ATmega168PA and ATmega328P” on page 277.

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 11-3 on page 60 shows reset and Interrupt Vectors placement for the various combina-

tions 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.

Table 11-2.

Reset and Interrupt Vectors in ATmega88PA

Vector No.

Program

Address(2)

Source

Interrupt Definition

0x000(1)

RESET

External Pin, Power-on Reset, Brown-out Reset and Watchdog System Reset

0x001

INT0

External Interrupt Request 0

0x002

INT1

External Interrupt Request 1

0x003

PCINT0

Pin Change Interrupt Request 0

0x004

PCINT1

Pin Change Interrupt Request 1

0x005

PCINT2

Pin Change Interrupt Request 2

0x006

WDT

Watchdog Time-out Interrupt

0x007

TIMER2 COMPA

Timer/Counter2 Compare Match A

0x008

TIMER2 COMPB

Timer/Counter2 Compare Match B

0x009

TIMER2 OVF

Timer/Counter2 Overflow

0x00A

TIMER1 CAPT

Timer/Counter1 Capture Event

0x00B

TIMER1 COMPA

Timer/Counter1 Compare Match A

0x00C

TIMER1 COMPB

Timer/Coutner1 Compare Match B

0x00D

TIMER1 OVF

Timer/Counter1 Overflow

0x00E

TIMER0 COMPA

Timer/Counter0 Compare Match A

0x00F

TIMER0 COMPB

Timer/Counter0 Compare Match B

0x010

TIMER0 OVF

Timer/Counter0 Overflow

0x011

SPI, STC

SPI Serial Transfer Complete

0x012

USART, RX

USART Rx Complete

0x013

USART, UDRE

USART, Data Register Empty

0x014

USART, TX

USART, Tx Complete

0x015

ADC

ADC Conversion Complete

0x016

EE READY

EEPROM Ready

0x017

ANALOG COMP

Analog Comparator

0x018

TWI

2-wire Serial Interface

0x019

SPM READY

Store Program Memory Ready

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