ATtiny44 datasheet(48/236 Pages) ATMEL

48 / 236 page

8006H–AVR–10/09

ATtiny24/44/84

Interrupts

This section describes the specifics of the interrupt handling as performed in ATtiny24/44/84.

For a general explanation of the AVR interrupt handling, see “Reset and Interrupt Handling” on

page 12.

9.1

Interrupt Vectors

The interrupt vectors of ATtiny24/44/84 are described in Table 9-1 below.

If the program never enables an interrupt source, the Interrupt Vectors are not used, and regular

program code can be placed at these locations.

The most typical and general setup for Reset and Interrupt Vector Addresses in ATtiny24/44/84

is shown in the program example below.

Table 9-1.

Reset and Interrupt Vectors

Vector No.

Program Address

Source

Interrupt Definition

0x0000

RESET

External Pin, Power-on Reset,

Brown-out Reset, Watchdog Reset

0x0001

INT0

External Interrupt Request 0

0x0002

PCINT0

Pin Change Interrupt Request 0

0x0003

PCINT1

Pin Change Interrupt Request 1

0x0004

WDT

Watchdog Time-out

0x0005

TIM1_CAPT

Timer/Counter1 Capture Event

0x0006

TIM1_COMPA

Timer/Counter1 Compare Match A

0x0007

TIM1_COMPB

Timer/Counter1 Compare Match B

0x0008

TIM1_OVF

Timer/Counter1 Overflow

0x0009

TIM0_COMPA

Timer/Counter0 Compare Match A

0x000A

TIM0_COMPB

Timer/Counter0 Compare Match B

0x000B

TIM0_OVF

Timer/Counter0 Overflow

0x000C

ANA_COMP

Analog Comparator

0x000D

ADC

ADC Conversion Complete

0x000E

EE_RDY

EEPROM Ready

0x000F

USI_STR

USI START

0x0010

USI_OVF

USI Overflow

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