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ATmega162 数据表(PDF) 62 Page - ATMEL Corporation |
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ATmega162 数据表(HTML) 62 Page - ATMEL Corporation |
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62 / 324 page  62 2513K–AVR–07/09 ATmega162/V • 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 Inter?upt Vectors ldi r16, (1<<IVCE) out GICR, r16 ; Move interrupts to Boo? Flash section ldi r16, (1<<IVSEL) out GICR, r16 ret C Code Example void Move_interrupts(void) { /* Enable change of?Interrupt Vectors */ GICR = (1<<IVCE); /* Move interrupts to Bo?t Flash section */ GICR = (1<<IVSEL); } |
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