Single chip microcomputer controlled power grid detection and reset circuit

Abstract

The invention relates to a single chip microcomputer controlled power grid detection and reset circuit, which is characterized by comprising a micro-control circuit, a main control circuit and an audion circuit, wherein a PA1 detection port of the micro-control circuit is connected with a 12V power supply through the main control circuit to form a power grid power on / power failure detection structure, a PA4 of the micro-control circuit is used as an output port and is externally connected with an external interruption port of a main control chip of a main control chip circuit through electrical resistance, the micro-control circuit controls an audion to switch on / off, and an output end of the audion circuit forms the reset circuit for the main control circuit; a single chip microcomputer chip PA4 port of the micro-control circuit respectively starts and stops outputting a 200HZ square wave signal according to the power on and power failure of the PA1 port, so that the main control circuit can enter a normal or power-save working mode. The single chip microcomputer controlled power grid detection and reset circuit has the beneficial effects that the circuit is simple in structure, the used components are less, and the economic benefit is increased.

Description

Technical field [0001] The invention relates to a home appliance product controller circuit, in particular to a circuit for detecting and resetting a power grid controlled by a single-chip microcomputer. It belongs to the field of single-chip microcomputer application and household appliance product control technology. Background technique [0002] At present, in many electronic products controlled by a single-chip microcomputer chip, the single-chip microcomputer chip is powered by the power grid and the battery respectively to ensure the operation of the single-chip microcomputer chip when the power grid is powered on and the power is off. Due to the limited power of the battery, in order to prolong the service life of the battery, in the power-down state, the single-chip microcomputer chip must enter the power-saving working mode to ensure the longest use of the battery. Therefore, it is necessary to perform power-on and power-down detection on the power grid and generate a r...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a single-chip microcomputer-controlled power grid detection and reset circuit in order to overcome the defects of complex structure, many components and high production costs in the prior art.

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