ATMEGA406_0607 datasheet(53/263 Pages) ATMEL

53 / 263 page

2548E–AVR–07/06

ATmega406

When the BOOTRST Fuse is unprogrammed, the Boot section size set to 2K bytes and the IVSEL bit in the MCUCR Reg-

ister 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

0x0000

RESET:

ldi

r16,high(RAMEND); Main program start

0x0001

out

SPH,r16

; Set Stack Pointer to top of RAM

0x0002

ldi

r16,low(RAMEND)

0x0003

out

SPL,r16

0x0004

sei

; Enable interrupts

0x0005

<instr>

xxx

;

.org 0x4C02

0x4C02

jmp

BPINT

; Battery Protection Interrupt Handler

0x4C04

jmp

EXT_INT0

; External Interrupt Request 0 Handler

...

;

0x4C2C

jmp

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 0x0002

0x0002

jmp

BPINT

; Battery Protection Interrupt Handler

0x0004

jmp

EXT_INT0

; External Interrupt Request 0 Handler

...

;

0x002C

jmp

SPM_RDY

; Store Program Memory Ready Handler

;

.org 0x4C00

0x4C00

RESET:

ldi

r16,high(RAMEND); Main program start

0x4C01

out

SPH,r16

; Set Stack Pointer to top of RAM

0x4C02

ldi

r16,low(RAMEND)

0x4C03

out

SPL,r16

0x4C04

sei

; Enable interrupts

0x4C05

<instr>

xxx

When the BOOTRST Fuse is programmed, the Boot section size set to 2K 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 0x4C00

0x4C00

jmp

RESET

; Reset handler

0x4C02

jmp

BPINT

; Battery Protection Interrupt Handler

0x4C04

jmp

EXT_INT0

; External Interrupt Request 0 Handler

...

;

0x4C2C

jmp

SPM_RDY

; Store Program Memory Ready Handler

;

0x4C2E

RESET:

ldi

r16,high(RAMEND); Main program start

ATMEGA406_0607 Datasheet(PDF) 53 Page - ATMEL Corporation

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