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ATmega128 Scheda tecnica(PDF) 65 Page - ATMEL Corporation

Il numero della parte ATmega128
Spiegazioni elettronici  8-bit Microcontroller with 128K Bytes In-System Programmable Flash
PDF  386 Pages
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Produttore elettronici  ATMEL [ATMEL Corporation]
Homepage  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

ATmega128 Scheda tecnica(HTML) 65 Page - ATMEL Corporation

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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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