WO2017107147A1

WO2017107147A1 - Usb connector, and detection method

Info

Publication number: WO2017107147A1
Application number: PCT/CN2015/098763
Authority: WO
Inventors: 马雷
Original assignee: 华为技术有限公司
Priority date: 2015-12-24
Filing date: 2015-12-24
Publication date: 2017-06-29
Also published as: CN108432066B; CN108432066A

Abstract

Disclosed is a USB connector (100), and connection of a second identification pin (25) of a second interface (20) included in the USB connector (100) to a second ground pin (23) is via a USB device. When a USB device is inserted in the second interface (20), the second ground pin (23) deforms to enable the second identification pin (25) to be connected to the second ground pin (23); when the USB device is unplugged from the second interface (20), the second ground pin (23) recovers from deformation to disconnect the second identification pin (25) from the second ground pin (23). As can be seen from the above, if a first interface (10) of the USB connector is connected to a micro USB interface of a terminal device and the second interface (20) of the USB connector is not connected to a USB device, the second identification pin (25) of the second interface (20) is floating, and the terminal device does not supply power to the USB device. In addition, the terminal device only supplies power to the USB device and enumerates the USB device if the second interface (20) is connected to the USB device to connect the second identification pin (25) to the second ground pin (23), and the terminal device identifies that an identification pin of the micro USB interface of the terminal device outputs a low level. In this way, power consumption of the terminal device is reduced.

Description

USB connector and detection method

Technical field

The present invention relates to the field of data communication connection technologies, and in particular, to a USB connector and a detection method.

Background technique

The OTG (On-The-Go) line is mainly used for connection between various devices (such as user terminals and USB flash drives, user terminals and digital cameras, etc.) so that data can be exchanged between devices. The OTG line includes a micro USB interface and an OTG interface. The OTG interface includes five lines, of which two data lines (D+ and D-), one power line (VBUS), one ground line (GND), and one identification ID line. . When the micro USB interface of the terminal device is not inserted into the OTG line, the ID pin of the micro USB interface of the terminal device is left floating, and the general purpose input/output port corresponding to the ID pin of the terminal device is placed high. Level, when the micro USB interface of the terminal device is connected to the micro USB interface of the existing OTG line, the terminal device sets the GPIO port corresponding to the ID pin of the terminal device to a low level, and the terminal device supplies power to the USB device. And perform USB enumeration. It can be seen that when the micro USB interface of the terminal device is connected to the micro USB interface of the OTG line, and the USB device is not connected to the OTG line, the terminal device still supplies power to the USB device, and performs USB enumeration to increase the power consumption of the terminal device.

Summary of the invention

The embodiment of the invention provides a USB connector, in order to reduce the power consumption of the terminal device.

A first aspect of the present invention provides a USB connector, including a first interface and a second interface, where the first interface includes a first data pin, a second data pin, a first ground pin, and a first voltage lead And the first identification pin, the second interface includes a third data pin, a fourth data pin, a second ground pin, a second voltage pin, and a second identification pin, where the first data is a second data pin is connected to the third data pin, the second data pin is connected to the fourth data pin, the first ground pin is connected to the second ground pin, and the first voltage pin is connected to the first a second voltage pin, the first identity pin is connected to the second identity pin, and the second identity pin is connected to the second ground pin by a USB device, and the USB device is inserted into the second interface The second ground pin is deformed such that the second identity pin is connected to the second ground pin, and when the USB device is pulled out from the second interface, the second ground pin is deformed to cause the first The second identification pin is disconnected from the second ground pin.

With reference to the first aspect of the present invention, in a first possible implementation manner of the first aspect, when the second interface is in a state in which the USB device is not inserted, the second ground pin is not deformed, and the second identifier is The pin is not connected to the second ground pin, and the second identity pin is in a floating state.

With reference to the first aspect of the present invention or the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, when the second interface is in a USB device state, the second grounding Deformation of the foot, the second ground pin is connected to a ground pin of the interface of the USB device, and the second identity pin is connected to the second ground pin to short the second identity pin to ground .

With reference to the first aspect of the present invention or the first possible implementation manner of the first aspect, in a third possible implementation manner of the first aspect, when the second interface is in a USB device state, the second grounding The foot is deformed, and the second identification pin and the second ground pin are connected to the ground pin of the USB device to short the second identification pin to the ground.

With reference to the first aspect of the present invention, the first to the third possible implementation manner of the first aspect, in a fourth possible implementation manner of the first aspect, the foregoing second identity identifier pin and the foregoing The shape of the two ground pins is U-shaped.

With reference to the first aspect of the present invention, the first to the third possible implementation manner of the first aspect, in a fifth possible implementation manner of the first aspect, the second identity identifier pin and the foregoing The shape of the two ground pins is L-shaped.

With reference to the first aspect of the present invention, any one of the first to fifth possible implementation manners of the first aspect, in a sixth possible implementation manner of the first aspect, the second identity identifier pin and the foregoing The gap between the two ground pins is less than or equal to 1 mm.

With reference to the first aspect of the present invention, the first to sixth possible implementation manners of the first aspect, in the seventh possible implementation manner of the first aspect, the first interface is a micro USB interface, The second interface is a USB interface.

With reference to the seventh possible implementation manner of the first aspect of the present invention, in the eighth possible implementation manner of the first aspect, the first interface is a micro-seat USB interface; or the first interface is a micro-base USB interface.

In a ninth possible implementation manner of the first aspect, the second interface is a public USB interface; or the second interface is a female USB interface. .

A second aspect of the embodiment of the present invention provides a USB connector, a detection method, and the terminal device is connected to the USB connector of any one of the above claims 1 to 10, and the method includes the following steps:

The terminal device detects a status of an identity recognition pin of the micro USB interface of the terminal device;

If the terminal device detects that the level of the identification pin output of the micro USB interface of the terminal device changes from a high level to a low level, the terminal device supplies power to the voltage pin of the micro USB interface of the terminal device. The terminal device is configured to supply power to a USB device connected to the USB connector; the terminal device performs USB enumeration;

If the terminal device detects that the level of the identification pin output of the micro USB interface of the terminal device changes from a low level to a high level, the terminal device stops supplying power to the voltage pin of the micro USB interface of the terminal device. The USB device connected to the USB connector is powered off by disconnecting the above terminal device.

With reference to the second aspect of the present invention, in a first possible implementation manner of the second aspect, after the terminal device performs USB enumeration, the method further includes:

If the number of unsuccessful USB enumerations is greater than or equal to a preset threshold, the terminal device stops supplying power to the voltage pin of the micro USB interface of the terminal device to disconnect the terminal device as a USB device connected to the USB connector. powered by.

With reference to the first possible implementation manner of the second aspect of the present invention, in a second possible implementation manner of the second aspect, after the terminal device stops power supply of the voltage pin of the micro USB interface of the terminal device, the foregoing method Also includes:

The terminal device outputs prompt information, and the prompt information is used to prompt the user to re-plug the USB device connected to the USB connector.

It can be seen that in the USB connector provided by the present invention, the second identification pin of the second interface is connected to the second ground pin through the USB device, and when the USB device is inserted into the second interface, the second ground pin occurs. The deformation causes the second identification pin to be connected to the second ground pin, and when the USB device is pulled out from the second interface, the second ground pin is deformed to be disconnected such that the second identification pin is disconnected from the second ground pin . It can be seen that when the first interface of the USB connector is connected to the micro USB interface of the terminal device, and the second interface of the USB connector is not connected to the USB device, the second identification pin of the second interface is in a floating state, and the terminal device is The GPIO port corresponding to the ID pin is still in a high state, and the terminal device does not supply power to the USB device. Only when the second interface is connected to the USB device, the second identification pin is connected to the second ground pin, and the terminal device will The GPIO port corresponding to the ID pin of the terminal device is placed in a low state, the terminal device recognizes that the identification pin of the micro USB interface of the terminal device outputs a low level, the terminal device supplies power to the USB device, and performs USB enumeration. In turn, the power consumption of the terminal device is reduced.

DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments and the prior art description will be briefly described below. Obviously, the drawings in the following description are only some implementations of the present invention. For example, other drawings may be obtained from those of ordinary skill in the art based on these drawings without any inventive labor.

FIG. 1 is a schematic diagram of a USB connector provided by the present invention.

2 is a schematic view showing the connection of the USB connector of FIG. 1.

FIG. 3 is a schematic diagram of the connection of the USB connector of FIG. 1. FIG.

4 is a schematic view showing the connection of the USB connector of FIG. 1.

FIG. 5 is a schematic flow chart of a detection method provided by the present invention.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is an embodiment of the invention, but not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of the present invention.

The details are described below separately.

The terms "first", "second", "third", and "fourth" and the like in the specification and claims of the present invention are used to distinguish different objects, and are not intended to describe a specific order. .

Referring to FIG. 1 to FIG. 4, the USB connector 100 of the present invention includes a first interface 10 and a second interface 20. The first interface 10 includes a first data pin 11, a second data pin 12, and a first interface. a ground pin 13, a first voltage pin 14 and a first identification pin 15, the second interface 20 includes a third data pin 21, a fourth data pin 22, a second ground pin 23, and a second voltage a pin 24 and a second identification pin 25, wherein the first data pin 11 is connected to the third data pin 21, the second data pin 12 is connected to the fourth data pin 22, and the first ground pin 13 is connected. Connected to the second ground pin 23, the first voltage pin 14 is connected to the second voltage pin 24, and the first identity pin 15 is connected to the second identity pin 25, wherein the second identity pin 25 Connected to the second ground pin 23 through the USB device, when the USB device is inserted into the second interface 20, the second ground pin 23 is deformed such that the second identity pin 25 is connected to the second ground pin 23, when the USB device When the second interface 20 is pulled out, the second ground pin 23 is deformed to disappear so that the second identity pin 25 and the second Ground pin 23 is disconnected.

Optionally, the first interface 10 is a micro USB interface, and the second interface 20 is a USB interface.

Optionally, the first interface 10 is a micro-seat USB interface; or the first interface 10 is a micro-seat USB interface.

Optionally, the second interface 20 is a female USB interface; or the second interface 20 is a public USB interface.

Optionally, when the second interface 20 is in the state of not being inserted into the USB device, the second ground pin 23 is not deformed, the second identity pin 25 is not connected to the second ground pin 23, and the second identity pin is 25 is in a floating state. For example, the first interface 10 is connected to the micro USB interface of the terminal device, the second interface 20 is not connected to the USB device, the second identity identification pin 25 is in a floating state, and the GPIO port corresponding to the ID pin of the terminal device is still in the In the high state, the terminal device recognizes that the identification pin of the micro USB interface of the terminal device outputs a high level, and the terminal device does not supply power to the USB device, and does not perform USB enumeration. Compared with the prior art, the second identity pin 25 of the second interface 20 of the USB connector provided by the present invention is not connected to the second ground pin 23, when the first interface 10 When the second interface 20 is not connected to the USB device, the terminal device recognizes that the ID is pulled high, the terminal device recognizes the slave device, the terminal device does not supply power to the USB device, does not perform USB enumeration, and reduces the terminal. The power consumption of the device.

Optionally, when the second interface 20 is in the state of inserting the USB device, the second ground pin 23 is deformed, and the second ground pin 23 is connected to the ground pin of the interface of the USB device, and the second identifier is The pin 25 and the second ground pin 23 are connected such that the second identity pin 25 is shorted to ground. For example, as shown in FIG. 3 or FIG. 4, when the first interface 10 is connected to the micro USB interface of the terminal device and the second interface 20 is connected to the USB device, the second ground pin 23 is inserted into the second interface 20 by the USB device. When the ground pin of the interface of the USB device presses the second ground pin 23, the second ground pin 23 is deformed, so that the second ground pin 23 is in contact with the second identity pin 25, so that the second identity Pin 25 is shorted to ground. The terminal device sets the GPIO port of the terminal device corresponding to the ID pin to a low level, and the terminal device recognizes that the identification pin of the micro USB interface of the terminal device outputs a low level, and the terminal device supplies power to the USB device, and performs USB enumeration.

Optionally, the shape of the second identity 25 pin and the second ground pin 23 are U-shaped. As shown in Figure 3.

Optionally, the second identity 25 pin and the second ground pin 23 are L-shaped. As shown in Figure 4.

Optionally, when the second interface 20 is in the state of inserting the USB device, the second ground pin 23 is deformed, and the second identity pin 25 and the second ground pin 23 are connected to the ground pin of the interface of the USB device. Connected to short the second identity pin 25 to ground. For example, as shown in FIG. 2, when the first interface 10 is connected to the micro USB interface of the terminal device, and the second interface 20 is connected to the USB device, the second ground pin 23 and the second identity pin 25 are connected by the USB device. When the second interface 20 is inserted, the ground pin of the interface of the USB device is pressed to deform the second ground pin 23 and the second identity pin 23, so that the second ground pin 23 and the second identity pin 25 are The ground pin of the interface of the USB device is in contact such that the second identity pin 25 is shorted to ground. The terminal device sets the GPIO port of the terminal device corresponding to the ID pin to a low level, and the terminal device recognizes that the identification pin of the micro USB interface of the terminal device outputs a low level, and the terminal device supplies power to the USB device, and performs USB enumeration.

Optionally, the gap between the second identity pin 25 and the second ground pin 23 is less than or equal to 1 mm.

It can be seen that in the USB connector provided by the present invention, the second identification pin 25 of the second interface 20 is connected to the second ground pin 23 through the USB device, and when the USB device is inserted into the second interface 20, the second The ground pin 23 is deformed such that the second identity pin 25 is connected to the second ground pin 23. When the USB device is pulled out from the second interface 20, the second ground pin 23 is deformed to disappear so that the second identity pin 25 is disconnected from the second ground pin 23. It can be seen that when the first interface 10 of the USB connector is connected to the micro USB interface of the terminal device, and the second interface 20 of the USB connector is not connected to the USB device, the second identification pin 25 of the second interface 20 is in a floating state. The GPIO port of the terminal device corresponding to the ID pin is still in a high state, and the terminal device does not supply power to the USB device. Only when the second interface 20 is connected to the USB device, the second identification pin 25 and the second grounding pin The pin 23 is connected, and the terminal device sets the GPIO port corresponding to the ID pin of the terminal device to a low level state, and the terminal device recognizes that the identification pin of the micro USB interface of the terminal device outputs a low level, and the terminal device supplies power to the USB device. And perform USB enumeration, which reduces the power consumption of the terminal device.

Referring to FIG. 5, FIG. 5 specifically includes the following steps:

S501. The terminal device detects a status of an identity identifier pin of the micro USB interface of the terminal device.

S502. If the terminal device detects that the level of the identification pin output of the micro USB interface of the terminal device changes from a high level to a low level, the terminal device is a voltage reference of the micro USB interface of the terminal device. The foot is powered to cause the terminal device to supply power to the USB device connected to the USB connector; the terminal device performs USB enumeration.

S503. If the terminal device detects that the level of the identification pin output of the micro USB interface of the terminal device changes from a low level to a high level, the terminal device stops as a micro USB interface of the terminal device. The voltage pin is powered to disconnect the terminal device to power the USB device connected to the USB connector.

It should be noted that the USB connector is a USB connector disclosed in the embodiment of the present invention, and the terminal device is connected to the USB connector. For the structure of the USB connector, reference may be made to the related description of the foregoing embodiment. Narration. It can be understood that the detection method provided by the embodiment of the present invention is not limited to the structure of the USB connector disclosed in FIG. 1-4, and other similar or enabling the terminal device to implement the above. The structure of the USB connector of the detecting method is applicable to the embodiment of the present invention.

Specifically, the terminal device is not connected to the USB connector, and the identification pin of the micro USB interface of the terminal device is in a floating state. At this time, the level of the identification pin output of the micro USB interface of the terminal device is a high level. When the micro USB interface of the terminal device is connected to the first interface of the USB connector, and the second interface of the USB connector is connected to the USB device, the second ground pin of the second interface of the USB connector is deformed such that the second interface The second identification pin is connected to the second ground pin. At this time, the terminal device recognizes that the identification pin of the micro USB interface of the terminal device is short-circuited to the ground, and the terminal device sets the GPIO port of the terminal device corresponding to the ID pin. When placed at a low level, the terminal device recognizes that the level of the identification pin output of the micro USB interface of the terminal device changes from a high level to a low level, and the terminal device supplies power to the USB device so that the terminal device is connected to the USB connection. The USB device is powered, and then the terminal device performs USB enumeration.

When the USB device is unplugged from the second interface of the USB connector, the second ground pin deformation of the second interface of the USB connector disappears such that the second identification pin and the second ground lead of the second interface of the USB connector The foot is disconnected. At this time, the terminal device recognizes that the identification pin of the micro USB interface of the terminal device is suspended, and the terminal device sets the GPIO port of the terminal device corresponding to the ID pin to a high level, and the terminal device recognizes the terminal device. The level of the identification pin output of the micro USB interface changes from a low level to a high level, and the terminal device stops supplying power to the voltage pin of the micro USB interface of the terminal device to disconnect the terminal device to connect to the USB connection. The USB device is powered.

The terminal device may be a mobile phone, a tablet computer, a notebook computer, a palmtop computer, a mobile internet device (MID), a wearable device (such as a smart watch (such as an iwatch), a smart bracelet, a pedometer, etc. ) or other terminal equipment.

Among them, the USB device can be a USB flash drive, a hard disk, a mobile phone, a tablet computer, a notebook computer, a palmtop computer, a mobile internet device (MID), and the like.

It can be seen that since the second identification pin of the second interface of the USB connector is connected to the second ground pin through the USB device, when the first interface of the USB connector is connected to the micro USB interface of the terminal device, and the USB connection When the second interface of the device is not connected to the USB device, the second identification pin of the second interface is in a floating state, and the GPIO port of the terminal device corresponding to the ID pin is still in a high state, and the terminal device does not supply power to the USB device. , do not perform USB enumeration, only connect USB device on the second interface When the second identification pin is connected to the second ground pin, the terminal device sets the GPIO port of the terminal device corresponding to the ID pin to a low state, and the terminal device identifies the identity of the micro USB interface of the terminal device. The pin outputs a low level, and the terminal device supplies power to the USB device and performs USB enumeration, thereby reducing the power consumption of the terminal device.

Optionally, after the terminal device performs USB enumeration, the method further includes:

If the number of times the USB enumeration is unsuccessful is greater than or equal to the preset threshold, the terminal device stops supplying power to the voltage pin of the micro USB interface of the terminal device to disconnect the terminal device to supply power to the USB device connected to the USB connector.

The preset threshold may be 1, 2, 3, 5, 6, 7, or other values, for example.

For example, since the second ground pin is deformed such that the second identity pin is connected to the second ground pin, the terminal device sets the GPIO port of the terminal device corresponding to the ID pin to a low state, and the terminal device The identification pin of the micro USB interface that identifies the terminal device outputs a low level, and the terminal device supplies power to the USB device and performs USB enumeration. If the USB device connected to the USB device is a problematic USB device, the USB device enumeration in the terminal device cannot be enumerated successfully. In this case, if the terminal device has been enumerated by USB, the power consumption of the terminal device will increase. . Therefore, in order to reduce the power consumption of the terminal device, if the number of unsuccessful USB enumeration is greater than or equal to the preset threshold, the terminal device stops supplying power to the voltage pin of the micro USB interface of the terminal device.

Optionally, after the terminal device stops supplying power to the voltage pin of the micro USB interface of the terminal device, the terminal device further includes:

The terminal device outputs a prompt message for prompting the user to re-plug the USB device connected to the USB connector.

The manner in which the terminal device outputs the prompt information may be a short message reminder, a voice reminder or a breathing light reminder; and the like.

The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that The technical solutions described in the embodiments are modified, or some of the technical features are replaced by equivalents; and the modifications or substitutions do not deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

A USB connector, comprising: a first interface and a second interface, the first interface comprising a first data pin, a second data pin, a first ground pin, a first voltage pin, and a An identification pin, the second interface includes a third data pin, a fourth data pin, a second ground pin, a second voltage pin, and a second identification pin, the first data pin Connected to the third data pin, the second data pin is connected to the fourth data pin, the first ground pin is connected to the second ground pin, the first voltage lead a pin connected to the second voltage pin, the first identity pin being connected to the second identity pin, the second identity pin being connected to the second ground pin by a USB device Demolition of the second ground pin when the USB device is inserted into the second interface, such that the second identity pin is connected to the second ground pin, when the USB device is pulled from the second interface When the second ground pin is deformed, the second identity disappears Identifying a second pin is disconnected from the ground pin.
The USB connector according to claim 1, wherein when the second interface is in a state in which the USB device is not inserted, the second ground pin is not deformed, and the second identity pin is not The second ground pin is connected, and the second identity pin is in a floating state.
The USB connector according to claim 1 or 2, wherein when the second interface is in a state of being inserted into a USB device, the second ground pin is deformed, the second ground pin is A ground pin of the interface of the USB device is connected, and the second identity pin is coupled to the second ground pin to short the second identity pin to ground.
The USB connector according to claim 1 or 2, wherein when the second interface is in a state of being inserted into a USB device, the second ground pin is deformed, and the second identity pin and the device are The second ground pin is connected to the ground pin of the USB device to short the second identity pin to ground.
The USB connector according to any one of claims 1 to 4, wherein the shape of the second identity pin and the second ground pin are U-shaped.
The USB connector according to any one of claims 1 to 4, wherein the second identity pin and the second ground pin are L-shaped.
The USB connector according to any one of claims 1 to 6, wherein the second The gap between the identification pin and the second ground pin is less than or equal to 1 mm.
The USB connector according to any one of claims 1 to 7, wherein the first interface is a micro USB interface, and the second interface is a USB interface.
The USB connector according to claim 8, wherein the first interface is a micro-seat USB interface; or the first interface is a micro-master USB interface.
The USB connector according to claim 8, wherein the second interface is a male USB interface; or the second interface is a female USB interface.
The invention is characterized in that: the terminal device is connected to the USB connector according to any one of claims 1 to 10, characterized in that it comprises:

The terminal device detects a status of an identity recognition pin of the micro USB interface of the terminal device;

If the terminal device detects that the level of the identification pin output of the micro USB interface of the terminal device changes from a high level to a low level, the terminal device is a voltage reference of the micro USB interface of the terminal device. Powering the foot to enable the terminal device to supply power to a USB device connected to the USB connector; the terminal device performs USB enumeration;

If the terminal device detects that the level of the identification pin output of the micro USB interface of the terminal device changes from a low level to a high level, the terminal device stops the voltage of the micro USB interface of the terminal device. The pin is powered to disconnect the terminal device to power a USB device connected to the USB connector.
The method according to claim 11, wherein after the terminal device performs USB enumeration, the method further includes:

If the number of times the USB enumeration is unsuccessful is greater than or equal to a preset threshold, the terminal device stops supplying power to the voltage pin of the micro USB interface of the terminal device to disconnect the terminal device from being connected to the USB The connector's USB device is powered.
The method according to claim 12, wherein after the terminal device stops supplying power to the voltage pin of the micro USB interface of the terminal device, the method further includes:

The terminal device outputs prompt information, where the prompt information is used to prompt the user to re-plug the USB device connected to the USB connector.