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Detection circuit and detection method of plug-and-play device, and terminal

A detection circuit, plug-and-play technology, applied in the field of circuits, can solve problems such as inaccurate detection results

Active Publication Date: 2021-08-06
HONOR DEVICE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The embodiment of the present application provides a plug-and-play device detection circuit, detection method, and terminal to solve the problem of inaccurate detection results existing in existing OTG device detection solutions

Method used

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  • Detection circuit and detection method of plug-and-play device, and terminal
  • Detection circuit and detection method of plug-and-play device, and terminal
  • Detection circuit and detection method of plug-and-play device, and terminal

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Embodiment Construction

[0032] The embodiments of the present application will be further described in detail below in conjunction with the accompanying drawings.

[0033] The present application relates to detecting whether an external device connected to the detection circuit is an OTG device through a detection circuit of the OTG device. Wherein, the detection circuit can be placed in the OTG device as the host, and the OTG device as the host can use the detection circuit to detect whether the external device connected to itself is an OTG device.

[0034] When the OTG device as the host detects whether the external device connected to itself is an OTG device, it usually uses figure 1 scheme shown. exist figure 1 In the scheme shown, the detection chip can generate currents of different magnitudes when used for different purposes, and the currents of different magnitudes are output in a polling switching manner. Taking the detection chip as PMI8952 as an example, PMI8952 can generate four curren...

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Abstract

The invention discloses a detection circuit and a detection method of a plug-and-play device, and a terminal, which are used for solving the problem of inaccurate detection result of the existing OTG equipment detection scheme. The detection circuit comprises a detection unit, a detection end and a detection chip, wherein the detection unit comprises a voltage source and a first resistor which are connected in series, the voltage source is used for generating a first voltage, and the first resistor is used for dividing the first voltage to obtain a second voltage; the detection end is connected with external equipment and the detection unit and is used for providing a connection interface for the detection circuit and the external equipment; and the detection chip is connected with the first resistor and is used for judging that the external equipment is OTG equipment when the second voltage is smaller than the set voltage.

Description

[0001] This application is a divisional case of a Chinese patent application submitted to the China Patent Office on February 27, 2017, with the application number 201780005028.6, and the title of the invention is "a detection circuit, detection method and terminal for plug-and-play equipment"; this application requires The priority of a Chinese patent application filed with the China Patent Office on November 23, 2016, with application number 201611038369.7, and the title of the invention is "a method and device for identifying plug-and-play OTG", the entire contents of which are incorporated by reference in this application in the file. It is only for the sake of concise expression, and its entire content will not be repeated in the original text in this application document. technical field [0002] The present application relates to the field of circuit technology, in particular to a detection circuit, a detection method and a terminal of a plug-and-play device. Backgrou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F13/40
CPCG06F13/4081G06F13/38G06F13/4295G06F1/266Y02D10/00G01R19/16576G01R15/04G01R19/16528G06F1/28
Inventor 张亮王朝徐波
Owner HONOR DEVICE CO LTD
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