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Watchdog control circuit

A control circuit and watchdog technology, applied in the direction of electrical digital data processing, instrumentation, error detection/correction, etc., can solve problems such as the inability to restart the microcontroller system, and achieve the effect of efficient and accurate restart

Pending Publication Date: 2022-05-31
HENRICH ELECTRONICS SUZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present invention solves the technical problem in the prior art that the microcontroller system cannot be restarted due to the failure of the watchdog chip by providing a watchdog control circuit

Method used

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Embodiment Construction

[0028] The embodiment of the present invention solves the technical problem in the prior art that the microcontroller system cannot be restarted due to the failure of the watchdog chip by providing a watchdog control circuit.

[0029] The technical solution of the embodiment of the present invention is to solve the above-mentioned technical problems, and the general idea is as follows:

[0030] The invention provides a watchdog control circuit, the circuit includes: a microcontroller, a watchdog chip, a tri-state gate circuit and a timing circuit; wherein, the microcontroller is connected with the watchdog chip and the The tri-state gate circuit is electrically connected, and the timing circuit is electrically connected to the tri-state gate circuit;

[0031] The timing circuit is used to provide a corresponding enable signal for the tri-state gate circuit;

[0032] The tri-state gate circuit is used to follow the watchdog signal of the microcontroller to output the dog feedi...

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Abstract

The invention discloses a watchdog control circuit. The watchdog control circuit comprises a microcontroller, a watchdog chip, a three-state gate circuit and a timing circuit, wherein the microcontroller is respectively and electrically connected with the watchdog chip and the three-state gate circuit, and the timing circuit is electrically connected with the three-state gate circuit; the timing circuit is used for providing a corresponding enable signal for the three-state gate circuit; the three-state gate circuit is used for outputting a dog feeding signal of the watchdog chip along with a watchdog signal of the microcontroller under the control of the enable signal; and the watchdog chip is used for determining whether to output a reset signal of the microcontroller according to the dog feeding signal so as to reset and restart the microcontroller. By adopting the method and the device, the technical problem that the microcontroller system cannot be restarted due to the failure of the watchdog chip in the prior art is solved.

Description

technical field [0001] The invention relates to the technical field of electronic circuits, in particular to a watchdog control circuit. Background technique [0002] In the process of electronic circuit design, due to its own failure or external interference and other factors, there is a certain probability of running out of the system, causing system downtime and immeasurable losses. At this time, the system needs to be able to automatically correct errors and restart the system. The watchdog chip or circuit is based on this requirement. Especially for products with high reliability requirements, it is necessary to add a hardware watchdog chip to the circuit. [0003] However, it has been found in practice that even if a watchdog chip is added in the prior art, the startup of the watchdog chip requires the enablement of the microcontroller. Under the conditions of the microcontroller system failure due to its own reasons or other external interference, the microprocessor...

Claims

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Application Information

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IPC IPC(8): G06F11/07G06F1/24
CPCG06F11/0757G06F1/24
Inventor 李汝虎贺冬
Owner HENRICH ELECTRONICS SUZHOU
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