Atmel AVR User Manual

127. WDR – Watchdog Reset
127.1. Description
This instruction resets the Watchdog Timer. This instruction must be executed within a limited time given
by the WD prescaler. See the Watchdog Timer hardware specification.
Operation:
(i) WD timer restart.
Syntax: Operands: Program Counter:
(i) WDR None PC ← PC + 1
16-bit Opcode:
1001 0101 1010 1000
127.2. Status Register (SREG) and Boolean Formula
I T H S V N Z C
– – – – – – – –
Example:
wdr ; Reset watchdog timer
Words 1 (2 bytes)
Cycles 1
Atmel AVR Instruction Set Manual [OTHER]
Atmel-0856L-AVR-Instruction-Set-Manual_Other-11/2016
187

Atmel AVR Specifications

General

Architecture	8-bit RISC
SRAM	Up to 16 KB
Clock Speed	Up to 20 MHz
Operating Voltage	1.8V to 5.5V
ADC	10-bit ADC
Communication Interfaces	SPI, I2C, USB
Packages	DIP, SOIC, QFN
Special Features	Watchdog Timer
Flash Memory	1KB to 256KB
EEPROM	64B to 4KB