watchdog timer


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watchdog timer

[′wäch‚dȯg ‚tīm·ər]
(control systems)
In a flexible manufacturing system, a safety device in the form of a control interface on an automated guided vehicle that shuts down part or all of the system under certain conditions.

watchdog timer

A clock circuit that keeps counting from a set number down to zero. If the event it is monitoring occurs before it reaches zero, it resets to the starting number and starts counting down again. If the timer reaches zero, it performs some action; for example, a diagnostic operation such as rebooting the computer or sending an error message. See watchdog packet.
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References in periodicals archive ?
The common interface API for programmers has been updated to fully support features of this new Watchdog timer board.
The Internal Serial PC Watchdog upgrades now include RoHS - Lead Free assembly, non-volatile memory for user options, faster communications speeds and full program support including the universal DLL to incorporate features available on the company's PCI and USB PC Watchdog timer offerings.
Processor Supervisor--provides a host processor with two basic functions: detection of power supply fault conditions and a watchdog timer to escape a software lockup condition.
Other key features included within the family are an 8-input 10-bit Analog to Digital Converter with integrated touch screen controller, 32KB of on-chip SRAM, a Vectored Interrupt Controller to speed the serving of interrupts, three UARTs, Synchronous Serial Port, three 16-bit Counter/Timers with Capture, Compare and PWM logic, Watchdog Timer and Low Voltage Detector.
All H8/38004 MCUs provide an on-chip LCD controller, asynchronous event counter, 8-bit timer, 16-bit timer, 2-channel 10-bit pulse width modulation (PWM) timer, watchdog timer, 4-channel 10-bit A/D converter, serial communication interface, clock oscillator, 32 kilohertz (KHz) sub-clock oscillator and interrupt controller.
The MCU device integrates a suite of six 8-bit and 16-bit timers including a watchdog timer (WDT) and a special 2-channel 16-bit asynchronous event counter.
These devices integrate a low voltage reset, power-on-reset, watchdog timer and various memory configurations including 16K, 32K, 64K and 128Kbit nonvolatile memory depending on device.