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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AT90USB646 датащи(PDF) 71 Page - ATMEL Corporation |
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AT90USB646 датащи(HTML) 71 Page - ATMEL Corporation |
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71 / 459 page  71 7593H–AVR–11/08 ATmega32U6/AT90USB64/128 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: ; Get MCUCR in r16, MCUCR mov r17, r16 ; Enable change of Interrupt Vectors ori r16, (1<<IVCE) out MCUCR, r16 ; Move interrupts to Boot Flash section ori r17, (1<<IVSEL) out MCUCR, r17 ret C Code Example void Move_interrupts(void) { unsigned char temp; /* Get MCUCR */ temp = MCUCR; /* Enable change of Interrupt Vectors */ MCUCR = temp | (1<<IVCE); /* Move interrupts to Boot Flash section */ MCUCR = temp | (1<<IVSEL); } |
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