Microprocessor control system operating state interrupting data protection process and circuit thereof

A technology of operating status and control system, applied in the direction of data processing power supply, etc., can solve the problems of inapplicability of microprocessor control system, high price of uninterruptible power supply equipment, and inapplicability, etc. strong effect

Inactive Publication Date: 2004-03-31
厦门金明达科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The first method, the price of uninterruptible power supply equipment is relatively high, and it is not applicable in general microprocessor control systems
The first method, because of the need to set up complex power switching and battery charging circuits in the microprocessor control system, and the use of the battery itself will bring new problems, it is not applicable to the simpler microprocessor control system

Method used

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  • Microprocessor control system operating state interrupting data protection process and circuit thereof
  • Microprocessor control system operating state interrupting data protection process and circuit thereof
  • Microprocessor control system operating state interrupting data protection process and circuit thereof

Examples

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Embodiment Construction

[0015] Please refer to figure 1 , the DC power supply circuit 1 of the system separates an energy storage power supply circuit 2 to supply power to a microprocessor (MCU) 3 and an electrically erasable read-only memory (EEPROM) 4 . In addition, a power failure detection circuit 5 is connected to the input port of the MCU 3 ; the power failure detection circuit 5 is powered by the DC power supply circuit 1 . The data exchange ports of the MCU 3 and the EEPROM 4 are connected to each other. Run a program in the MCU 3 to monitor the output of the power-off detection circuit on the input port. If the power-off signal is found, the field protection subroutine in the EEPROM 4 is called immediately to save the field data of the system operating status into the EEPROM 4 . The process time for the power supply voltage of the energy storage power supply circuit 2 to drop to the allowable value for the normal operation of the system's MCU 3 and EEPROM 4 is longer than the MCU 3 detects ...

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Abstract

The invention relates to microprocessor control system operating state circuit breaking data protection method and circuit, wherein a power storage energy supply return circuit is arranged from the direct current supply circuit of the system for power supply to the micro computer unit (MCU) and electrical erasable read-only memory (EEPROM), a switching-off detection circuit powered by DC power supply circuit is arranged to be connected to the input port of the MCU, the MCU is interconnected with the data exchange port of the EEPROM, the MCU operates a program to monitor the circuit breaking detection circuit output on the input port.

Description

Technical field [0001] The invention relates to the power-off data protection of a microprocessor system, in particular to a method and a circuit for protecting the power-off data of the running state of a garage door system controlled by a microprocessor. Background technique [0002] During the operation of the microprocessor control system, it is inevitable to encounter power outages. When the power is off, the system status data needs to be protected so that the system can continue to work normally after power on. In the previous solutions, one is to connect the power supply of the microprocessor control system to the uninterruptible power supply device, and the uninterruptible power supply device supplies power when the power is off, and completes the corresponding system state data protection work; the other is to connect the power supply of the microprocessor control system A backup battery is set inside, which is powered by the battery when the power is off, and comp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F1/30
Inventor 吴小明
Owner 厦门金明达科技发展有限公司
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