ATMEGA32 View Datasheet(PDF) - Atmel Corporation

Part Name

Description

MFG CO.

ATMEGA32

8-bit Microcontroller with 32K Bytes In-System Programmable Flash

Atmel Corporation 

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ATmega32(L)

The following code example shows one assembly and one C function for turning off the

WDT. The example assumes that interrupts are controlled (for example by disabling

interrupts globally) so that no interrupts will occur during execution of these functions.

Assembly Code Example

WDT_off:

; reset WDT

wdr

; Write logical one to WDTOE and WDE

in r16, WDTCR

ori r16, (1<<WDTOE)|(1<<WDE)

out WDTCR, r16

; Turn off WDT

ldi r16, (0<<WDE)

out WDTCR, r16

ret

C Code Example

void WDT_off(void)

{

/* reset WDT */

_WDR();

/* Write logical one to WDTOE and WDE */

WDTCR |= (1<<WDTOE) | (1<<WDE);

/* Turn off WDT */

WDTCR = 0x00;

}

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2503J–AVR–10/06

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