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ATmega162 Datasheet(PDF) 62 Page - ATMEL Corporation

Part # ATmega162
Description  8-bit Microcontroller with 16K Bytes In-System Programmable Flash
PDF  324 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

ATmega162 Datasheet(HTML) 62 Page - ATMEL Corporation

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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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