Datasheet

Adddress Labels Code Comments

$001 RESET: ldi r16,high(RAMEND) ; Main program

start

$002 out SPH,r16 ; Set Stack

Pointer to top of

RAM

$003 ldi r16,low(RAMEND)

$004 out SPL,r16

$005 sei ; Enable

interrupts

$006 <instr> XXX

;

.org $c01

$c01 rjmp EXT_INT0 ; IRQ Handler

$c02 rjmp EXT_INT1 ; IRQ| Handler

:. :. :.

$c12 rjmp SPM_RDY ; Store Program

Memory Ready

Handler

When the BOOTRST Fuse is programmed and the boot section size set to 2K bytes, the most typical and

general program setup for the Reset and Interrupt Vector Addresses is:

Address Labels Code Comments

.org $001

$001 rjmp EXT_INT0 ; IRQ0 Handler

$002 EXT_INT1 ; IRQ1 Handler

:. :. :. ;

$012 rjmp SPM_RDY ; Store Program

Memory Handler

;

.org $c00

$c00 rjmp RESET ; Reset handler

;

$c01 RESET: ldi r16,high(RAMEND) ; Main program

start

$c02 out SPH,r16 ; Set Stack

Pointer to top of

RAM

AVR 8-Bit Microcontroller

Interrupts

Datasheet Complete

40001974A-page 71