Hardware watchdog circuit and single-chip microcomputer control system with task sequence monitoring

Abstract

The invention discloses a hardware watchdog circuit with task timing monitoring, which is used to monitor the gating signals of multi-channel analog switches, including a watchdog circuit, a 7-bit binary counter, a memory, a power-on reset RC circuit and Decimal synchronous up / down counter. Compared with the traditional BIT detection, the hardware watchdog circuit and single-chip microcomputer control system with task timing monitoring of the present invention integrate 7-bit binary counters and memory with the watchdog circuit, and will select and communicate with multi-channel analog switches. The comprehensive design of timing monitoring and hardware watchdog circuit not only solves the problem of real-time detection of time-sharing task monitoring, but also reduces software complexity, reduces circuit complexity, and improves system reliability and security. It can avoid signal misreading caused by the strobe signal not being strobed according to the timing, which will affect the realization of the control function or cause malfunction, and provides a solution for embedded applications that need timing monitoring.

Description

technical field [0001] The invention relates to the technical field of single-chip microcomputer control, in particular to a hardware watchdog circuit with task sequence monitoring. In addition, the present invention also relates to a single-chip microcomputer control system including the above-mentioned hardware watchdog circuit with task sequence monitoring. Background technique [0002] In the current single-chip microcomputer application system, in order to improve the reliability and testability of the system, the acquisition of analog quantity is to use an AD converter to select the signal to be converted by time-sharing gating the channels of multiple analog switches. In order to ensure the correct sampling of the signal, it is necessary to monitor the output multi-channel analog switch strobe signal, so as to avoid signal misreading caused by the switch not being gated according to the timing, affecting the realization of the control function or causing malfunction, ...

AI Technical Summary

Problems solved by technology

[0003] The invention provides a hardware watchdog circuit with task timing monitoring to solve the technical problems of high circuit complexity and high software complexity existing in the existing single-chip microcomputer using BIT test

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