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Button module

A button and module technology, applied in the direction of virtual button detection/prevention, logic circuit connection/interface layout, etc., can solve problems such as user troubles and button bounce

Inactive Publication Date: 2014-09-17
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

[0002] Mechanical switches will have the problem of button bounce, that is to say, during the process of pressing the button, the system will detect the GPIO (General Purpose Input / Output) fluctuating due to noise problems due to the phenomenon of unstable pressing. The displayed phenomenon will feel that the same button is being pressed continuously, causing great trouble to the user

Method used

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Embodiment Construction

[0012] see figure 1 , an electronic device 900 in a preferred embodiment includes a button module 100 and a processing unit 200 . The button module 100 includes a first output terminal 102 , a second output terminal 104 , a high level generating unit 20 , a first button 21 , a first anti-bounce unit 22 and a low level generating unit 24 . In this embodiment, the first button 21 is a mechanical button.

[0013] Both the first output terminal 102 and the second output terminal 104 are connected to the processing unit 200 .

[0014] The high level generating unit 20 is connected to the first output terminal 102 and the second output terminal 104 .

[0015] The first terminal of the first button 21 is connected to the first output terminal 102 through the first anti-bounce unit 22 , and the second terminal of the first button 21 is connected to the low level generating unit 24 . When the first button 21 is not pressed, the high-level generating unit 20 generates a high-level si...

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Abstract

The invention relates to a button module. The button module comprises a first output end, a first button, a high level generation unit, a low level generation unit and a first anti-bouncing unit, wherein the first output end is connected with a processing unit, a first end of the first button is connected with the first output end through the first anti-bouncing unit, a second end of the first button is connected with the low level generation unit, and the high level generation unit is connected with the first output end. When the first button is not pressed, the high level generation unit generates a high level signal and transmits the high level signal to the first output end, so the processing unit is enabled to detect that the first button is not pressed. When the first button is pressed, the low level generation unit outputs a low level signal through the pressed first button to the first anti-bouncing unit, the first anti-bouncing unit is used for transmitting the low level signal to the first output end when being-pressed duration time of the first button is greater than or equal to first preset time, so the processing unit is enabled to detect that the first button is pressed and corresponding functions are performed.

Description

technical field [0001] The invention relates to a button module. Background technique [0002] Mechanical switches will have the problem of button bounce, that is to say, during the process of pressing the button, the system will detect the GPIO (General Purpose Input / Output) fluctuating due to noise problems due to the phenomenon of unstable pressing. The displayed phenomenon will feel that the same button is being pressed continuously, causing great trouble to the user. Contents of the invention [0003] In view of this, it is necessary to provide a key module that prevents keys from being incorrectly input due to bouncing. [0004] A button module includes a first output terminal, a first button, a high level generating unit, a low level generating unit and a first anti-bounce unit, and the first output terminal is connected to a processing unit. The first end of the first key is connected to the first output end through the first anti-bounce unit, the second end of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03K19/0175
CPCH03M11/003
Inventor 王雅国陈俊卿
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD