Data Sheet

68
ATmega48A/PA/88A/PA/168A/PA/328/P [DATASHEET]
Atmel-8271H-AVR- ATmega-Datasheet_08/2014
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 0x3C02
0x3C02 jmp EXT_INT0 ; IRQ0 Handler
0x3C04 jmp EXT_INT1 ; IRQ1 Handler
... ... ... ;
0x3C32 jmp SPM_RDY ; Store Program Memory Ready Handler
When the BOOTRST Fuse is programmed and the Boot section size set to 2Kbytes, the most typical and
general program setup for the Reset and Interrupt Vector Addresses in ATmega328/328P is:
Address Labels Code Comments
.org 0x0002
0x0002 jmp EXT_INT0 ; IRQ0 Handler
0x0004 jmp EXT_INT1 ; IRQ1 Handler
... ... ... ;
0x0032 jmp SPM_RDY ; Store Program Memory Ready Handler
;
.org 0x3C00
0x3C00 RESET: ldi r16,high(RAMEND); Main program start
0x3C01 out SPH,r16 ; Set Stack Pointer to top of RAM
0x3C02 ldi r16,low(RAMEND)
0x3C03 out SPL,r16
0x3C04 sei ; Enable interrupts
0x3C05 <instr> xxx
When the BOOTRST Fuse is programmed, the Boot section size set to 2Kbytes 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 ATmega328/328P is:
Address Labels Code Comments
;
.org 0x3C00
0x3C00 jmp RESET ; Reset handler
0x3C02 jmp EXT_INT0 ; IRQ0 Handler
0x3C04 jmp EXT_INT1 ; IRQ1 Handler
... ... ... ;
0x3C32 jmp SPM_RDY ; Store Program Memory Ready Handler
;
0x3C34 RESET: ldi r16,high(RAMEND); Main program start
0x3C35 out SPH,r16 ; Set Stack Pointer to top of RAM
0x3C36 ldi r16,low(RAMEND)
0x3C37 out SPL,r16
0x3C38 sei ; Enable interrupts
0x3C39 <instr> xxx