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ATmega128-16AU Fiches technique(PDF) 65 Page - ATMEL Corporation |
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ATmega128-16AU Fiches technique(HTML) 65 Page - ATMEL Corporation |
65 / 386 page 65 2467S–AVR–07/09 ATmega128 • Bit 0 – IVCE: Interrupt Vector Change Enable The IVCE bit must be written to logic one to enable change of the IVSEL bit. IVCE is cleared by hardware four cycles after it is written or when IVSEL is written. Setting the IVCE bit will disable interrupts, as explained in the IVSEL description above. See Code Example below. Assembly Code Example Move_interrupts: ; Enable change of interrupt vectors ldi r16, (1<<IVCE) out MCUCR, r16 ; Move interrupts to boot flash section ldi r16, (1<<IVSEL) out MCUCR, r16 ret C Code Example void Move_interrupts(void) { /* Enable change of interrupt vectors */ MCUCR = (1<<IVCE); /* Move interrupts to boot flash section */ MCUCR = (1<<IVSEL); } |
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