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ATmega328P Datasheet(PDF) 61 Page - ATMEL Corporation |
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ATmega328P Datasheet(HTML) 61 Page - ATMEL Corporation |
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61 / 448 page  61 8161D–AVR–10/09 ATmega48PA/88PA/168PA/328P 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 ATmega88PA is: Address Labels Code Comments 0x000 RESET: ldi r16,high(RAMEND); Main program start 0x001 out SPH,r16 ; Set Stack Pointer to top of RAM 0x002 ldi r16,low(RAMEND) 0x003 out SPL,r16 0x004 sei ; Enable interrupts 0x005 <instr> xxx ; .org 0xC01 0xC01 rjmp EXT_INT0 ; IRQ0 Handler 0xC02 rjmp EXT_INT1 ; IRQ1 Handler ... ... ... ; 0xC19 rjmp 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 ATmega88PA is: Address Labels Code Comments .org 0x001 0x001 rjmp EXT_INT0 ; IRQ0 Handler 0x002 rjmp EXT_INT1 ; IRQ1 Handler ... ... ... ; 0x019 rjmp SPM_RDY ; Store Program Memory Ready Handler ; .org 0xC00 0xC00 RESET: ldi r16,high(RAMEND); Main program start 0xC01 out SPH,r16 ; Set Stack Pointer to top of RAM 0xC02 ldi r16,low(RAMEND) 0xC03 out SPL,r16 0xC04 sei ; Enable interrupts 0xC05 <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 in ATmega88PA is: Address Labels Code Comments ; .org 0xC00 0xC00 rjmp RESET ; Reset handler 0xC01 rjmp EXT_INT0 ; IRQ0 Handler 0xC02 rjmp EXT_INT1 ; IRQ1 Handler ... ... ... ; 0xC19 rjmp SPM_RDY ; Store Program Memory Ready Handler ; 0xC1A RESET: ldi r16,high(RAMEND); Main program start |
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