attiny25v ATMEL Corporation, attiny25v Datasheet - Page 46
attiny25v
Manufacturer Part Number
attiny25v
Description
Microcontroller With 2/4/8k Bytes In-system Programmable Flash
Manufacturer
ATMEL Corporation
Datasheet
1.ATTINY25V.pdf
(231 pages)
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8.4.2
46
ATtiny25/45/85
Code Example
The following code example shows one assembly and one C function for turning off the WDT.
The example assumes that interrupts are controlled (e.g., by disabling interrupts globally) so that
no interrupts will occur during execution of these functions.
Note:
Assembly Code Example
C Code Example
WDT_off:
void WDT_off(void)
{
}
wdr
; Clear WDRF in MCUSR
ldi
out
; Write logical one to WDCE and WDE
; Keep old prescaler setting to prevent unintentional Watchdog Reset
in
ori r16, (1<<WDCE)|(1<<WDE)
out WDTCSR, r16
; Turn off WDT
ldi r16, (0<<WDE)
out WDTCSR, r16
ret
_WDR();
/* Clear WDRF in MCUSR */
MCUSR = 0x00
/* Write logical one to WDCE and WDE */
WDTCSR |= (1<<WDCE) | (1<<WDE);
/* Turn off WDT */
WDTCSR = 0x00;
1. See
r16, WDTCSR
r16, (0<<WDRF)
MCUSR, r16
“Code Examples” on page
(1)
(1)
6.
2586K–AVR–01/08
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