Power failure detection and data storage circuit for microcomputer system

Abstract

The invention discloses a power failure detection and data storage circuit for a microcomputer system. The power failure detection and data storage circuit for the microcomputer system comprises a microprocessor (3), a clock circuit (1), a power failure detection circuit (2) and a ferroelectric memory (4), wherein the microprocessor (3) serves as a central processor of the microcomputer system; the clock circuit (1) is used for recording the time at the moment of system power failure; the ferroelectric memory FM22L16-55-TG serves as the ferroelectric memory (4) and is used for storing system data at the moment of system power failure; when the system power failure is detected by the power failure detection circuit (2), the system time and the system data are immediately stored in the memory. The circuit hardware is simple in structure and low in cost. The power failure detection and data storage circuit for the microcomputer system has a certain use value at the aspects, such as, vehicle, traffic control and intelligent parking lot managing systems, and the like.

Description

technical field [0001] The invention relates to a microcomputer system detection and storage circuit, in particular to a microcomputer system power-down detection and data storage circuit. Background technique [0002] In the microcomputer control system, the program to be executed by the CPU, the data to be processed, and the intermediate results of the processing are all stored in the memory. At present, almost all the memory of the microcomputer uses volatile memory. Once the system loses power unexpectedly, these data are often lost. lost. Therefore, when the system unexpectedly loses power, certain detection measures must be taken for power-down protection of the system to avoid system confusion. [0003] Currently commonly used power-down detection and data storage circuits also include: a microprocessor, and also include: a clock circuit, a power-down detection circuit and a ferroelectric memory. When designing the clock circuit, it involves the selection of the bac...

AI Technical Summary

Problems solved by technology

Traditional non-volatile memory technology is derived from ROM technology, which has disadvantages such as not easy to write, and writing requires large power consumption.

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