ATmega48PA/88PA/168PA/328P
0x0020
0x0022
0x0024
0x0026
0x0028
0x002A
0x002C
0x002E
0x0030
0x0032
;
jmp
jmp
jmp
jmp
jmp
jmp
jmp
jmp
jmp
jmp
TIM0_OVF
; Timer0 Overflow Handler
SPI_STC
USART_RXC
USART_UDRE
USART_TXC
ADC
; SPI Transfer Complete Handler
; USART, RX Complete Handler
; USART, UDR Empty Handler
; USART, TX Complete Handler
; ADC Conversion Complete Handler
; EEPROM Ready Handler
EE_RDY
ANA_COMP
TWI
; Analog Comparator Handler
; 2-wire Serial Interface Handler
; Store Program Memory Ready Handler
SPM_RDY
0x0033RESET:
0x0034
0x0035
0x0036
0x0037
0x0038
ldi
out
ldi
out
sei
r16, high(RAMEND); Main program start
SPH,r16
; Set Stack Pointer to top of RAM
r16, low(RAMEND)
SPL,r16
; Enable interrupts
<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 in ATmega328P is:
Address Labels Code
0x0000 RESET: ldi
Comments
r16,high(RAMEND); Main program start
0x0001
0x0002
out
ldi
SPH,r16
; Set Stack Pointer to top of RAM
r16,low(RAMEND)
SPL,r16
0x0003
0x0004
out
sei
; Enable interrupts
0x0005
;
<instr> xxx
.org 0x3C02
0x3C02
0x3C04
...
jmp
jmp
...
jmp
EXT_INT0
; IRQ0 Handler
EXT_INT1
...
; IRQ1 Handler
;
0x3C32
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 in
ATmega328P is:
Address Labels Code
.org 0x0002
Comments
0x0002
0x0004
...
jmp
jmp
...
jmp
EXT_INT0
EXT_INT1
...
; IRQ0 Handler
; IRQ1 Handler
;
0x0032
;
SPM_RDY
; Store Program Memory Ready Handler
.org 0x3C00
0x3C00 RESET: ldi
r16,high(RAMEND); Main program start
67
8161D–AVR–10/09
ATMEL [ ATMEL ]
