ATMEGA128-16AU SL383 Atmel, ATMEGA128-16AU SL383 Datasheet - Page 65

• Manufacturer Part Number: ATMEGA128-16AU SL383
• Manufacturer: Atmel

2467S–AVR–07/09
• 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
C Code Example
Move_interrupts:
void Move_interrupts(void)
{
}
; 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
/* Enable change of interrupt vectors */
MCUCR = (1<<IVCE);
/* Move interrupts to boot flash section */
MCUCR = (1<<IVSEL);
ATmega128
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