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Interface identification circuit, interface identification method and intelligent terminal

A technology for interface identification and intelligent terminals, which is applied in the direction of circuit devices, battery circuit devices, safety/protection circuits, etc., can solve the problem of large space occupation and achieve the effect of saving space

Pending Publication Date: 2022-01-11
SHENZHEN TRANSSION HLDG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above technical problems, this application provides an interface identification circuit, an interface identification method and an intelligent terminal, aiming at solving the technical problem that the existing interface identification chip occupies a large space

Method used

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  • Interface identification circuit, interface identification method and intelligent terminal
  • Interface identification circuit, interface identification method and intelligent terminal
  • Interface identification circuit, interface identification method and intelligent terminal

Examples

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no. 1 example

[0081] An embodiment of the present application discloses an interface identification circuit. The smart terminal includes an interface with identification pins. The smart terminal may be the smart terminal in the above embodiments, or may be a speaker, a game console, or a smart wearable device. Optionally, the smart wearable device may include a smart bracelet, a smart watch, a smart armband, and the like. Optionally, the interface of the above intelligent terminal may be a TYPE-C interface.

[0082] image 3 Shows a schematic diagram of the circuit structure of the interface identification circuit of this embodiment, refer to image 3 As shown, the interface identification circuit includes a pull-up circuit 10 electrically connected to the identification pin of the interface, a control circuit 20 and a clamping circuit 30; the control circuit 30 is used to detect the target of the identification pin when an external device is connected to the interface Voltage, according ...

no. 2 example

[0089] refer to Figure 4 , based on the first embodiment, the present application proposes a second embodiment. In this embodiment, the identification pin includes a CC1 pin and a CC2 pin, and the pull-up circuit 10 includes a first resistor R1, a second resistor R2, a Three resistors R3 and power supply terminals; the first end of the first resistor R1 is connected to the CC1 pin, the first end of the second resistor R2 is connected to the CC2 pin; the second end of the first resistor R1, the second end of the second resistor R2 The two terminals, the second terminal of the third resistor R3 are connected to the control circuit 30 respectively, and the first terminal of the third resistor R3 is connected to the power supply terminal.

[0090] It should be understood that, as can be seen from the content of the first embodiment, the CC pin of the external device is provided with a corresponding pull-down resistor according to the TYPE-C protocol. The CC pins of external devi...

no. 3 example

[0098] refer to Figure 5 , based on the second embodiment, the present application proposes a third embodiment, the interface identification circuit also includes:

[0099] A filter circuit 40, the filter circuit 40 is connected in series in the path between the identification pin and the control circuit 30, the filter circuit 40 is used to filter out the signal sent by the charging device through the interface when the charging device is connected to the interface.

[0100] In this embodiment, when the charging device, especially the PD device is connected, it can be seen from the third embodiment above that the clamping circuit will clamp the voltage of the CC pin of the interface within the preset voltage range and the PD device is turned on start working. When the PD device starts to work, it will continuously output signals through the CC pin on the smart terminal interface. Optionally, the PD device will send a message signal when it is working, and the voltage of the ...

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Abstract

The invention provides an interface identification circuit and method and an intelligent terminal. The interface identification circuit is applied to the intelligent terminal, the intelligent terminal comprises an interface with an identification pin, and the interface identification circuit comprises a pull-up circuit, a control circuit and a clamping circuit, wherein the pull-up circuit is electrically connected with the identification pin; the control circuit is used for detecting a target voltage of the identification pin of an interface when an external device is connected to the interface, and controlling the intelligent terminal to enter a working mode corresponding to the external device according to the target voltage; and the clamping circuit is used for clamping the voltage of the identification pin of the interface within a preset voltage rang. According to the present invention, the technical problem that an existing interface identification chip occupies a large space is solved.

Description

technical field [0001] The present application relates to the technical field of intelligent terminals, in particular to an interface identification circuit, an interface identification method and an intelligent terminal. Background technique [0002] With the development of electronic information technology, smart terminals such as mobile phones and tablet computers have become indispensable production tools and living tools for people. For example, for a smart terminal with a TYPE-C interface, its built-in CC-Logic can not only adapt and activate an externally connected PD charger to achieve fast charging of the smart terminal, but also detect the power of the connected external device. The pull-down resistor of the CC pin determines the current device type, and then the smart terminal enters the corresponding working mode. [0003] In the process of conceiving and implementing this application, the inventors found that there are at least the following problems: the area ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00
CPCH02J7/00034H02J7/00308H02J7/0036H02J7/0045
Inventor 窦永清张建志
Owner SHENZHEN TRANSSION HLDG CO LTD
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