ATmega644PA datasheet(65/468 Pages) ATMEL

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8152G–AVR–11/09

ATmega164PA/324PA/644PA/1284P

0x00004

jmp

EXT_INT1

; IRQ1 Handler

...

;

0x00036

jmp

SPM_RDY

; SPM Ready Handler

;

.org 0x1F000

0x1F000

RESET: ldi

r16,high(RAMEND); Main program start

0x1F001

out

SPH,r16

; Set Stack Pointer to top of RAM

0x1F002

ldi

r16,low(RAMEND)

0x1F003

out

SPL,r16

0x1F004

sei

; Enable interrupts

0x1F005

<instr>

xxx

When the BOOTRST Fuse is programmed, the Boot section size set to 8K bytes and the IVSEL

bit in the MCUCR Register is set before any interrupts are enabled, the most typical and general

program setup for the Reset and Interrupt Vector Addresses is:

Address

Labels Code

Comments

;

.org 0x1F000

0x1F000

jmp

RESET

; Reset handler

0x1F002

jmp

EXT_INT0

; IRQ0 Handler

0x1F004

jmp

EXT_INT1

; IRQ1 Handler

...

;

0x1F036

jmp

SPM_RDY

; SPM Ready Handler

;

0x1F03E

RESET: ldi

r16,high(RAMEND); Main program start

0x1F03F

out

SPH,r16

; Set Stack Pointer to top of RAM

0x1F040

ldi

r16,low(RAMEND)

0x1F041

out

SPL,r16

0x1F042

sei

; Enable interrupts

0x1FO43

<instr>

xxx

11.2.1

Moving Interrupts Between Application and Boot Space

The General Interrupt Control Register controls the placement of the Interrupt Vector table.

ATmega644PA 데이터시트(PDF) 65 Page - ATMEL Corporation

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