ATmega162 datasheet(59/324 Pages) ATMEL

59 / 324 page

2513K–AVR–07/09

ATmega162/V

Table 26 shows Reset and Interrupt Vectors placement for the various combinations of

BOOTRST and IVSEL settings. If the program never enables an interrupt source, the Interrupt

Vectors are not used, and regular program code can be placed at these locations. This is also

the case if the Reset Vector is in the Application section while the Interrupt Vectors are in the

Boot section or vice versa.

Note:

1. The Boot Reset Address is shown in Table 93 on page 228. For the BOOTRST Fuse “1”

means unprogrammed while “0” means programmed.

The most typical and general program setup for the Reset and Interrupt Vector Addresses in

ATmega162 is:

Address

Labels

Code

Comments

0x000

jmp

RESET

; Reset Handler

0x002

jmp

EXT_INT0

; IRQ0 Handler

0x004

jmp

EXT_INT1

; IRQ1 Handler

0x006

jmp

EXT_INT2

; IRQ2 Handler

0x008

jmp

PCINT0

; PCINT0 Handler

0x00A

jmp

PCINT1

; PCINT1 Handler

0x00C

jmp

TIM3_CAPT

; Timer3 Capture Handler

0x00E

jmp

TIM3_COMPA

; Timer3 CompareA Handler

0x010

jmp

TIM3_COMPB

; Timer3 CompareB Handler

0x012

jmp

TIM3_OVF

; Timer3 Overflow Handler

0x014

jmp

TIM2_COMP

; Timer2 Compare Handler

0x016

jmp

TIM2_OVF

; Timer2 Overflow Handler

0x018

jmp

TIM1_CAPT

; Timer1 Capture Handler

0x01A

jmp

TIM1_COMPA

; Timer1 CompareA Handler

0x01C

jmp

TIM1_COMPB

; Timer1 CompareB Handler

0x01E

jmp

TIM1_OVF

; Timer1 Overflow Handler

0x020

jmp

TIM0_COMP

; Timer0 Compare Handler

0x022

jmp

TIM0_OVF

; Timer0 Overflow Handler

0x024

jmp

SPI_STC

; SPI Transfer Complete Handler

0x026

jmp

USART0_RXC

; USART0 RX Complete Handler

0x028

jmp

USART1_RXC

; USART1 RX Complete Handler

0x02A

jmp

USART0_UDRE

; UDR0 Empty Handler

0x02C

jmp

USART1_UDRE

; UDR1 Empty Handler

0x02E

jmp

USART0_TXC

; USART0 TX Complete Handler

0x030

jmp

USART1_TXC

; USART1 TX Complete Handler

0x032

jmp

EE_RDY

; EEPROM Ready Handler

0x034

jmp

ANA_COMP

; Analog Comparator Handler

0x036

jmp

SPM_RDY

; Store Program Memory Ready Handler

;

0x038 RESET:

ldi

r16,high(RAMEND) ; Main program start

0x039

out

SPH,r16

; Set Stack Pointer to top of RAM

Table 26. Reset and Interrupt Vectors Placement

(1)

BOOTRST

IVSEL

Reset address

Interrupt Vectors Start Address

0x0000

0x0002

0x0000

Boot Reset Address + 0x0002

Boot Reset Address

0x0002

Boot Reset Address

Boot Reset Address + 0x0002

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