ATmega169P datasheet(58/393 Pages) ATMEL

58 / 393 page

8018N–AVR–08/09

ATmega169P

0x0031

out

SPL,r16

0x0032

sei

; Enable interrupts

0x0033

<instr>

xxx

...

When the BOOTRST Fuse is unprogrammed, 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

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 0x1C02

0x1C02

jmp

EXT_INT0

; IRQ0 Handler

0x1C04

jmp

PCINT0

; PCINT0 Handler

...

;

0x1C2C

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

EXT_INT0

; IRQ0 Handler

0x0004

jmp

PCINT0

; PCINT0 Handler

...

;

0x002C

jmp

SPM_RDY

; Store Program Memory Ready Handler

;

.org 0x1C00

0x1C00

RESET: ldi

r16,high(RAMEND); Main program start

0x1C01

out

SPH,r16

; Set Stack Pointer to top of RAM

0x1C02

ldi

r16,low(RAMEND)

0x1C03

out

SPL,r16

0x1C04

sei

; Enable interrupts

0x1C05

<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 0x1C00

0x1C00

jmp

RESET

; Reset handler

0x1C02

jmp

EXT_INT0

; IRQ0 Handler

0x1C04

jmp

PCINT0

; PCINT0 Handler

...

;

0x1C2C

jmp

SPM_RDY

; Store Program Memory Ready Handler

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