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DOC7707 Fiches technique(PDF) 66 Page - List of Unclassifed Manufacturers

No de pièce DOC7707
Description  Microcontroller with 8/16K Bytes of ISP Flash and USB Controller
PDF  307 Pages
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Fabricant  ETC1 [List of Unclassifed Manufacturers]
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DOC7707 Fiches technique(HTML) 66 Page - List of Unclassifed Manufacturers

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7707F–AVR–11/10
AT90USB82/162
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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