Microcomputer system product and single-chip microcomputer reset circuit thereof

Abstract

The invention discloses a microcomputer system product and a single-chip microcomputer reset circuit thereof. The single-chip microcomputer reset circuit comprises a power connector and a low-level reset signal generating circuit unit that is used to generate a low-level reset signal, at the moment when power supply voltage or charging voltage is introduced via the power connector, in order to control a single-chip microcomputer to reset; the low-level reset signal generating circuit unit comprises a first resistor, a second resistor, a third resistor, a first capacitor and a NPN triode; boththe first end of the first resistor and the first end of the first capacitor are connected with the power connector; the second end of the first capacitor is connected with the first end of the thirdresistor and a base of the NPN triode via the second resistor; all the second end of the first resistor, the second end of the third resistor and an emitter of the NPN triode are grounded; a collectorof the NPN triode is connected with a reset pin of a single-chip microcomputer. The difficulty in the structural design of the microcomputer system product is greatly reduced.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to a single-chip microcomputer reset circuit of a microcomputer system product and the microcomputer system product. Background technique [0002] In order to ensure that the circuit of the microcomputer system product can work stably and reliably, the single-chip microcomputer reset circuit is an indispensable part of the microcomputer system product. The first function of the single-chip microcomputer reset circuit is power-on reset. Because the circuit of the microcomputer system product is a sequential digital circuit, and the sequential digital circuit needs a stable clock signal to work stably and reliably, so when the power supply of the microcomputer system product is powered on, it is necessary to wait until the clock signal is stable before the reset of the microcontroller reset circuit. The signal is removed, and the microcomputer system product starts to work normall...

AI Technical Summary

Problems solved by technology

[0003] However, many microcomputer system products (i.e. electronic products) all tend to be miniaturized and portable now, and the above-mentioned reset button will increase the volume of the microcomputer system product, and also need to reserve the position of the reset button on the product structure, thereby increasing The structural design difficulty of microcomputer system products

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