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External reset switch and rest circuit

A technology for resetting circuits and resetting switches, applied in electronic switches, electrical components, data reset devices, etc., to save time

Inactive Publication Date: 2006-12-20
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, when the MCU of a computer monitor suddenly crashes, the user may desperately press the power button on the monitor in order to restore the normal use of the monitor

Method used

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  • External reset switch and rest circuit

Examples

Experimental program
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Embodiment Construction

[0013] see figure 2 , is a circuit block diagram of a specific embodiment of the external reset switch and reset circuit of the present invention. The circuit block diagram of this embodiment mainly includes: an external reset switch 20 and a reset circuit 30 . Wherein the external reset switch 20 is connected to a microcontroller (MCU) 40 of an electronic product through a reset circuit 30, so that when the MCU 40 fails to work properly, a reset command is sent to reset each parameter inside the MCU 40 , to restore it to normal working condition. In the circuit block diagram of this specific embodiment, the external reset switch 20 is connected to the reset command input port (S in ) 330, the reset command is input into the reset circuit 30 through the reset command input port 330; an external voltage source (Vcc) 10 is connected to the external voltage input port 300 of the reset circuit 30 to provide the reset circuit 30 Driving voltage; the reset circuit 30 is connecte...

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PUM

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Abstract

The invention discloses an external replacement switch and circuit to restore MCU to normal working condition, which comprises the following parts: external replacement switch to send reset order, replacement circuit with voltage input and MCU with replacement interface to reset inner parameter according to reset signal, wherein the replacement circuit with voltage input consists of time-delaying circuit and switch circuit, wherein the time-delaying circuit receives a time-delaying order, which outputs the replacement order; the switch circuit produces a reset signal according to the output reset signal.

Description

【Technical field】 [0001] The invention relates to a reset switch and a circuit, in particular to an external reset switch and a reset circuit for resetting a microcontroller of an electronic product. 【Background technique】 [0002] Electronic products, such as computer monitors, when the microprocessor (MCU) in it cannot work normally, that is, when the machine is down, the general method is to cut off its power supply, for example, unplug the power plug of the monitor, and then plug it in after a period of time. Put on the plug, turn on the machine again, and use a power-on reset circuit to reset the MCU to make it return to normal working state. [0003] Such as figure 1 Shown is the circuit block diagram of resetting the MCU in the computer monitor in the prior art. The MCU 40 of the display is connected to a power supply 60 and a power-on reset circuit 50 . The power supply 60 passes through its power outlet (P out ) 600 to the power input port of MCU 40 (P in ) 410...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F1/24
CPCH03K17/223
Inventor 谢冠宏王汉哲钟新鸿
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD
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