Datasheet

2466T–AVR–07/10

ATmega16(L)

Note: 1. The Boot Reset Address is shown in Table 100 on page 257. 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

ATmega16 is:

Address Labels Code Comments

$000 jmp RESET ; Reset Handler

$002 jmp EXT_INT0 ; IRQ0 Handler

$004 jmp EXT_INT1 ; IRQ1 Handler

$006 jmp TIM2_COMP ; Timer2 Compare Handler

$008 jmp TIM2_OVF ; Timer2 Overflow Handler

$00A jmp TIM1_CAPT ; Timer1 Capture Handler

$00C jmp TIM1_COMPA ; Timer1 CompareA Handler

$00E jmp TIM1_COMPB ; Timer1 CompareB Handler

$010 jmp TIM1_OVF ; Timer1 Overflow Handler

$012 jmp TIM0_OVF ; Timer0 Overflow Handler

$014 jmp SPI_STC ; SPI Transfer Complete Handler

$016 jmp USART_RXC ; USART RX Complete Handler

$018 jmp USART_UDRE ; UDR Empty Handler

$01A jmp USART_TXC ; USART TX Complete Handler

$01C jmp ADC ; ADC Conversion Complete Handler

$01E jmp EE_RDY ; EEPROM Ready Handler

$020 jmp ANA_COMP ; Analog Comparator Handler

$022 jmp TWSI ; Two-wire Serial Interface Handler

$024 jmp EXT_INT2 ; IRQ2 Handler

$026 jmp TIM0_COMP ; Timer0 Compare Handler

$028 jmp SPM_RDY ; Store Program Memory Ready Handler

;

$02A RESET: ldi r16,high(RAMEND) ; Main program start

$02B out SPH,r16 ; Set Stack Pointer to top of RAM

$02C ldi r16,low(RAMEND)

$02D out SPL,r16

$02E sei ; Enable interrupts

$02F <instr> xxx

... ... ...

Table 19. Reset and Interrupt Vectors Placement

(1)

BOOTRST IVSEL Reset address Interrupt Vectors Start Address

1 0 $0000 $0002

1 1 $0000 Boot Reset Address + $0002

0 0 Boot Reset Address $0002

0 1 Boot Reset Address Boot Reset Address + $0002