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 Berkshire PC Watchdog timer products have continued to evolve and feature improved functionality, permitting companies to enhance the reliability of their computer system offerings and protect against malfunctions and lock ups.
As the first standalone device to join ST's watchdog timer portfolio, the STWD100 is housed in a 5-pin SC70-5 package with a footprint of 2.
a computer hardware design and manufacturing company, today announced that it is now shipping substantially upgraded versions of their Serial PC Watchdog Timers.
The MCU's watchdog timer can be used to safeguard system operation by automatically resetting the MCU in the event of a program runaway or lock up.
Moreover, the watchdog timer function, which prevents system lock up, can be disabled to facilitate system software debugging.
3af Power over Ethernet, dual MiniPCI slots, one RS-232 port, a watchdog timer, and is available in both commercial and extended temperature versions.
In Blackfin, Innov-X found all the features it was looking for on a single chip: a high-speed parallel peripheral interface (PPI); direct memory access (DMA) controllers to transfer high-speed data to on-chip memory; general purpose I/O (GPIO) pins to communicate with its I(2)C bus (a control bus that provides the communications link between integrated circuits); a universal asynchronous receiver/transmitter (UART) port to interface with peripherals; and several timers, including a watchdog timer.
These voltage supervisors offer a watchdog timer, manual reset, multiple combinations of push-pull or open-drain reset outputs, and factory trip-points from 2.
The recently introduced MAXQ2000 low-power microcontroller includes 64Bytes flash memory, 2kBytes SRAM, a 16-bit single-cycle hardware multiplier with 48-bit accumulate, a watchdog timer, two serial ports, an SPI(TM) master/slave port, three timers, external interrupts, and a 128-segment LCD controller.
Reliable low-power operation with Brownout Reset (BOR), extended Watchdog Timer (WDT), Programmable Low Voltage Detect (PLVD) and nanoWatt power-management modes