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Low voltage resetting method for microcontroller

A microcontroller, low-voltage technology, applied in the field of microcontroller circuits, can solve the problems of low precision and high power consumption, achieve good reset characteristics, low power consumption, and improve the effect of anti-interference performance

Inactive Publication Date: 2009-05-20
CRM ICBG (WUXI) CO LTD
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0004] The technical problem solved by the present invention is to provide a reset method for low-voltage reset circuits in microcontrollers, which can overcome the problems of high power consumption and low precision existing in some existing low-voltage reset circuits, and realize that microcontroller products can work In the case of low power consumption, it can achieve good high precision and anti-interference reset characteristics

Method used

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0020] Please see figure 1 , the present invention is a low-voltage reset circuit used in microcontrollers, including a high-precision low-voltage detection circuit module controlled by a system sleep signal and an anti-interference management module that uses clock signals in the microcontroller circuit to filter and generate reset signals two parts.

[0021] In order to achieve higher precision, it is necessary to control the power consumption within a certain range. Considering that the working mode of some microcontrollers is realized by timing wake-up, each working time is very short, so that the overall power consumption is controlled. at a very low level. For this type of microcontroller circuit, the present invention uses its sleep control signal to control the low-voltage reset circuit at the same time, so that the low-voltage reset circuit w...

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Abstract

The invention discloses a low-voltage reset method used in a microcontroller. A low-voltage reset circuit of the low-voltage reset method comprises a low-voltage detection circuit which is controlled by a sleep signal of a system, and also comprises an anti-interference management circuit which utilizes a clock signal in a microcontroller circuit for filtering and generates a reset signal, wherein an output signal of the low-voltage detection circuit and the clock signal are input signals of the anti-interference management circuit together. The low-voltage reset method guarantees that the reset circuit has the characteristics of low power consumption, high precision, anti-interference and so on, so that the microcontroller product can be operated in a situation with low power consumption and realize good electrifying property.

Description

technical field [0001] The invention belongs to the field of microcontroller circuits, and in particular relates to a low-voltage reset circuit used in a microcontroller and a reset method thereof. Background technique [0002] The microcontroller circuit system with its own oscillating circuit and clock generation module needs to ensure that the system enters a certain state during the power-on initialization process. Only in this way can the system enter a correct state, otherwise it will cause the program to run away and the system dysfunction. The circuit therefore requires a reset procedure that resets the registers in the system to their correct initial state. However, when the system is in normal operation, it may be subject to various external disturbances that may cause fluctuations in the power supply. At this time, there must be an effective way to control the current situation. If the fluctuations are relatively large, the system must be restarted to avoid crash...

Claims

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Application Information

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IPC IPC(8): G06F1/24
Inventor 赵海赵健邱丹顾宇飞王勇居水荣
Owner CRM ICBG (WUXI) CO LTD
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