ATtiny13A datasheet(45/174 Pages) ATMEL

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8126D–AVR–11/09

ATtiny13A

9. Interrupts

This section describes the specifics of the interrupt handling as performed in ATtiny13A. For a

general explanation of the AVR interrupt handling, refer to “Reset and Interrupt Handling” on

page 12.

9.1

Interrupt Vectors

The interrupt vectors of ATtiny13A 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 program setup for the Reset and Interrupt Vector Addresses in

ATtiny13A is:

Address

Labels Code

Comments

0x0000

rjmp

RESET

; Reset Handler

0x0001

rjmp

EXT_INT0

; IRQ0 Handler

0x0002

rjmp

PCINT0

; PCINT0 Handler

0x0003

rjmp

TIM0_OVF

; Timer0 Overflow Handler

0x0004

rjmp

EE_RDY

; EEPROM Ready Handler

0x0005

rjmp

ANA_COMP

; Analog Comparator Handler

0x0006

rjmp

TIM0_COMPA

; Timer0 CompareA Handler

0x0007

rjmp

TIM0_COMPB

; Timer0 CompareB Handler

0x0008

rjmp

WATCHDOG

; Watchdog Interrupt Handler

0x0009

rjmp

ADC

; ADC Conversion Handler

;

0x000A

RESET: ldi

r16, low(RAMEND); Main program start

0x000B

out

SPL,r16

; Set Stack Pointer to top of RAM

0x000C

sei

; Enable interrupts

0x000D

<instr>

xxx

...

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

TIM0_OVF

Timer/Counter Overflow

0x0004

EE_RDY

EEPROM Ready

0x0005

ANA_COMP

Analog Comparator

0x0006

TIM0_COMPA

Timer/Counter Compare Match A

0x0007

TIM0_COMPB

Timer/Counter Compare Match B

0x0008

WDT

Watchdog Time-out

0x0009

ADC

ADC Conversion Complete

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