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Control method and its device for preventing error cut-off machine

A control method and technology of a control device, applied in the direction of measuring devices, error detection/correction, instruments, etc., can solve the problems of complexity and complex structure of button control devices, and achieve the effect of simple control method, simple structure, and prevention of accidental shutdown

Inactive Publication Date: 2008-08-27
FOSHAN PREMIER SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Chinese patent application 03102413.0 discloses a key control device and method, the key control device and method can prevent misoperation or mistriggering of the handheld computer, but the structure of the disclosed key control device is relatively complicated, and the key control method needs many judgments. Secondary output or input state, and block or unblock state, very complicated

Method used

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  • Control method and its device for preventing error cut-off machine
  • Control method and its device for preventing error cut-off machine
  • Control method and its device for preventing error cut-off machine

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Embodiment Construction

[0025] Please refer to figure 2 , the schematic diagram of the control device for preventing accidental shutdown of the present invention, the switching device for preventing false shutdown of the present invention only needs to occupy one CPU pin, and cooperates with the control software to completely prevent the system from shutting down by mistake when starting up. The control device for preventing accidental shutdown includes a CPU with a power control module, and a switch control circuit connected to the CPU power control module,

[0026] The power supply control module includes a switch device, which is used to trigger the power on or off of digital cameras and other equipment; the switch device has a low-pass filter to reduce the peak signal of the key bounce; when the key is pressed, the switch will generate A signal to PWRON and the internal Schmidt's buffer; once there is power supply, the CPU will take over the various functions of the system and power management; ...

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Abstract

This invention discloses a control method for preventing error turning off including: 1, judging if the information is that of the power supply key action based on the generated information, if so, it enters into step 2, 2, judging if there is an pressing action of the key, if so, it enters into step 3, otherwise it enters into step 4, 3, noting 1 at the variable Power Flag and returning to step 1, 4, judging if the variable Power Flag is 1, if so, it enters into step 5, otherwise returning back to step 1, 5, judging if it is the power supply release action, if so it carries out the off instruction, otherwise, it returns back to step 1. The control device includes CPU with a power supply control module and a switch control circuit connected with said CPU power control module.

Description

【Technical field】 [0001] The present invention relates to an operation method and a device of a digital product, in particular to a control method and a device thereof capable of effectively identifying button operations and preventing false shutdown. 【Background technique】 [0002] Please refer to figure 1 , the existing circuit schematic diagram for preventing accidental shutdown, the action of preventing accidental shutdown of these embedded systems is processed by the signals of two pins of the CPU, such as figure 1 As shown, R5 and C4 are connected in parallel to filter, and C3 is a bypass capacitor to filter peak signals. When the power button SW2 is pressed, R4, R6 and R7 form a voltage divider circuit to generate a high-level signal PWR_ON to inform the CPU of the power supply. The control module is turned on; at the same time, the transistor Q1 is turned on, and PWR_OFF is at a low level; after turning on, the system judges whether the user shuts down by detecting ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F1/26G06F11/00
Inventor 管其达
Owner FOSHAN PREMIER SCI & TECH CO LTD
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