CN106502939B - USB adapter and data transmission equipment - Google Patents

The utility model discloses a USB adapter and data transmission equipment belongs to data transmission technical field. This USB adapter includes: the adapter comprises an adapter body, a USB circuit module formed in the adapter body and a control module formed in the adapter body. This is disclosed to be connected through control module and USB circuit module electricity, control module is used for detecting and judging whether the equipment that the second port passes through the data cable and connects is master equipment or slave unit, and the mode of operation according to judgement result control USB circuit module is the charge mode, non-OTG data transmission mode or OTG data transmission mode, make the USB adapter that this disclosed embodiment provided can realize charging for mobile device or carrying out non-OTG data transmission between master equipment and mobile device through the master equipment with the data line cooperation, also can realize carrying out OTG data transmission between mobile device and slave unit with the cooperation of OTG line.

USB adapter and data transmission equipment

Technical Field

The present disclosure relates to the field of data transmission devices, and in particular, to a USB (Universal Serial Bus) adapter and a data transmission device.

Background

The USB interface at the bottom of the smart phone is used for charging the smart phone or transmitting data, and along with the development trend of smart phone lightness and thinness, the Type-C interface comes up and comes up, and the USB interface is adopted by newly developed smart phones of various brands by virtue of the advantage that the USB interface supports the front and back sides of a data line to be insertable and thinner. However, the product needs a certain time for complete update and update, the USB interface of the smart phone sold in the market at present is mainly the Micro USB interface, the popularization of the Type-C interface is not enough, in order to avoid that the smart phone cannot be charged or data transmission cannot be carried out when a data line of the Type-C interface is forgotten to be carried, a user often uses the Type-C adapter to connect the smart phone and the data line of the Micro USB interface, and the charging or non-OTG data transmission of the smart phone adopting the Type-C interface is realized by matching the data line of the Micro USB interface with the Type-C adapter.

Current USB Type-C adapter includes the adapter body and forms the USB circuit module in the adapter body inside, the adapter body includes Micro USB socket end and Type-C plug end, USB circuit module's pin forms at Micro USB socket end and Type-C plug end, Micro USB socket end is used for being connected with the data line that adopts the Micro USB interface, main equipment such as power or computer is connected through the data line that adopts the Micro USB interface, connect the smart mobile phone that adopts the Type-C interface through Type-C plug end, make main equipment such as power or computer charge to smart mobile phone through USB circuit module, or carry out non-OTG data transmission between main equipment such as computer and smart mobile phone.

Disclosure of Invention

In order to overcome the problems in the related art, the present disclosure provides a USB adapter and a data transmission device.

In a first aspect, an embodiment of the present disclosure provides a USB adapter, where the USB adapter includes: the USB adapter comprises an adapter body, a USB circuit module formed in the adapter body and a control module formed in the adapter body;

the adapter body comprises a first port and a second port, the first port is used for connecting mobile equipment, and the second port is used for connecting master equipment or slave equipment through a data cable;

pins of the USB circuit module are formed at the first port and the second port;

the control module is electrically connected with the USB circuit module and is used for detecting and judging whether the equipment connected with the second port through the data cable is the master equipment or the slave equipment;

when the control module judges that the equipment connected with the second port through the data cable is the main equipment, the control module controls the working mode of the USB circuit module to be a charging mode or a non-OTG data transmission mode;

when the control module judges that the device connected with the second port through the data cable is a slave device, the control module controls the working mode of the USB circuit module to be an OTG data transmission mode.

Optionally, the control module includes a detection unit and a switch switching unit;

the detection unit is electrically connected with the USB circuit module and is used for detecting and judging whether the equipment connected with the second port through the data cable is main equipment or slave equipment;

the switch switching unit is electrically connected with the detection unit and the USB circuit module and is used for controlling the working mode of the USB circuit module according to the detection result of the detection unit.

Optionally, the USB circuit module includes a power line, a ground line, a positive voltage data line, a negative voltage data line, a configuration channel, an ID line, and an ID control circuit;

pins are formed at the first port and the second port at two ends of the power line, the grounding line, the positive voltage data line and the negative voltage data line respectively;

one end of the configuration channel forms a configuration channel pin at the first port, and the other end of the configuration channel is electrically connected with the switch switching unit;

one end of the ID wire forms an ID pin at the second port, the ID pin is electrically connected with the detection unit, the other end of the ID wire is electrically connected with the grounding wire through the ID control circuit, the ID control circuit is used for controlling the connection disconnection between the ID wire and the grounding wire when the equipment connected with the second port through the data cable is the main equipment, and controlling the connection between the ID wire and the grounding wire when the equipment connected with the second port through the data cable is the slave equipment.

Optionally, the detection unit comprises a detection component and a judgment subunit;

the detection component is electrically connected with the ID pin and is used for detecting the impedance to the ground of the ID pin;

the judging subunit is electrically connected to the detecting component and the switch switching unit, and is configured to judge, according to the impedance to ground of the ID pin, whether the device to which the second port is connected through the data cable is a master device or a slave device.

Preferably, when the impedance to ground of the ID pin is greater than a first preset resistance value, the determining subunit determines that the device connected to the second port through the data cable is a master device;

and when the impedance to ground of the ID pin is smaller than the second preset resistance value, the judging subunit judges that the equipment connected with the second port through the data cable is slave equipment.

Preferably, the first preset resistance value is 100 kilo ohms, and the second preset resistance value is 10 ohms.

Optionally, the switch switching unit includes a switch switching circuit, a pull-up resistor, and a pull-down resistor;

the switch switching circuit is respectively and electrically connected with the detection unit and the configuration channel, the pull-up resistor is electrically connected with the power line, the pull-down resistor is electrically connected with the grounding line, the pull-up resistor and the pull-down resistor are respectively and electrically connected with the switch switching circuit, and one of the pull-up resistor and the pull-down resistor is controlled to be connected with the configuration channel through the switch switching circuit;

when the detection unit judges that the device connected with the second port through the data cable is a main device, the switch switching circuit controls the pull-up resistor to be connected with the configuration channel, and pulls up the voltage of the pin of the configuration channel, so that the working mode of the USB circuit module is a charging mode or a non-OTG data transmission mode;

when the detection unit judges that the device connected with the second port through the data cable is a slave device, the switch switching circuit controls the pull-down resistor to be connected with the configuration channel, and pulls down the voltage of the pin of the configuration channel, so that the working mode of the USB circuit module is an OTG data transmission mode.

Preferably, the resistance value of the pull-up resistor is 56 +/-11.2 kilo-ohms, and the resistance value of the pull-down resistor is 5.1 +/-1.02 kilo-ohms.

Preferably, the control module is integrated on a chip inside the adapter body.

Preferably, the first port is a Type-C plug, and the second port is a Micro USB socket.

In a second aspect, a further embodiment of the present disclosure provides a data transmission device, where the data transmission device includes the USB adapter.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:

this is disclosed to be connected through control module and USB circuit module electricity, control module is used for detecting and judging whether the equipment that the second port passes through the data cable and connects is master equipment or slave unit, and the mode of operation according to judgement result control USB circuit module is the charge mode, non-OTG data transmission mode or OTG data transmission mode, make the USB adapter that this disclosed embodiment provided can realize charging for mobile device or carrying out non-OTG data transmission between master equipment and mobile device through the master equipment with the data line cooperation, also can realize carrying out OTG data transmission between mobile device and slave unit with the cooperation of OTG line.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

Fig. 1 is a schematic circuit diagram of a USB adapter according to an exemplary embodiment;

fig. 2 is a schematic diagram illustrating a usage state of the USB adapter according to an exemplary embodiment.

Wherein:

1, a connector body is connected with the connector body,

11 a first port of the first type of the valve,

12 of the second end of the first port,

2, controlling the module to be controlled,

21 detection unit, 211 detection unit, 212 judgment subunit,

22 switch switching unit, 221 circuit switching module, 222 pull-up resistor, 223 pull-down resistor,

3 USB circuit module, 31 power line, 32 grounding line, 33 positive voltage data line, 34 negative voltage data line, 35 configuration channel, 36 ID line, 37 ID control circuit,

4, moving the equipment to the mobile equipment,

5 a data cable for the data cable,

6 the second port is connected with the equipment through a data cable.

Detailed Description

To make the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

The USB circuit module of current Type-C adapter includes the power cord, the earth connection, the malleation data line, negative pressure data line and configuration passageway, the power cord, the earth connection, malleation data line and negative pressure data line correspond at Type-C plug end and Micro USB socket end and form power pin, ground connection pin, malleation data pin and negative pressure data pin, the configuration passageway forms the configuration passageway pin at Type-C plug end, the configuration passageway is connected with the power cord electricity through pull-up circuit, through Type-C plug end and the Type-C interface connection on the smart mobile phone. When the existing Type-C adapter is connected with a data line of a Micro USB interface through a Micro USB socket of the existing Type-C adapter, the smart phone serves as a slave device, a power supply or a host device such as a computer supplies power to the Type-C adapter through a power line, so that a configuration channel pulls up the voltage of a configuration channel pin, and a voltage difference exists between the configuration channel pin on the adapter and the configuration channel pin on the smart phone, so that the smart phone is charged through the power supply or non-OTG data transmission is performed between the computer and the smart phone, wherein the non-OTG data transmission refers to data transmission performed between the host and a mobile device when a host such as a computer exists between two devices for data transmission.

When using current Type-C adapter and the cooperation of OTG line, the unable voltage that changes configuration channel pin of OTG line leads to the voltage on the configuration channel pin to be in the pull-up state all the time and can't realize OTG data transmission function, and wherein, OTG data transmission indicates when there is not the host computer such as computer between two equipment that carry out data transmission, and one of two mobile device acts as the host computer, the data transmission who carries out between two mobile device.

Those skilled in the art can understand that, in any exemplary embodiment of the present disclosure, the master device includes a device that serves as a host by default, such as a computer, a charger, or a mobile power supply, the slave device includes a device that serves as a slave by default, such as a mouse, a keyboard, a USB disk, or a mobile hard disk, and the mobile device includes a mobile terminal device that serves as a slave by default, such as a smart phone, a digital camera, an MP3, an MP4, an MP5, or a tablet computer, and the like, which can serve as both a host and a slave device, a data interface on the mobile device has an OTG data transmission function and a non-OTG data transmission function, and a data interface on the mobile device can be a USB port, a Micro USB port, or a USB port, a Type-C port, and the like, in the exemplary embodiment of the present disclosure, the mobile device is taken as an example, and when the data interface on the mobile device is a Type-C interface, in the exemplary embodiment of the present disclosure, the first port of the USB adapter is a Type-C plug, and the second port is a Micro USB socket.

the detection part 211 is electrically connected to the ID pin for detecting impedance to ground of the ID pin;

In the exemplary embodiment of the present disclosure, the other end of the ID line 36 is electrically connected to the ground line 32 through the ID control circuit 37, the default ID pin is grounded, when the device 6 to which the second port 12 is connected through the data cable 5 is a master device, the master device inputs a rising edge signal to the ID control circuit 37 through the data cable 5, the ID control circuit 37 controls the ID line 36 to be disconnected from the ground line 32, the ID pin is floated so that the resistance to ground of the ID pin is increased, when the second port 12 is disconnected from the data cable 5, the master device inputs a falling edge signal to the ID control circuit 37 through the data cable 5, the ID control circuit 37 controls the ID line 36 to be connected to the ground line 32, and the ID pin is grounded; on the other hand, when the device 6 connected to the second port 12 via the data cable 5 is a slave device, since the slave device cannot supply power to the USB adaptor provided in the exemplary embodiment of the present disclosure via the data cable, the ID control circuit 37 does not operate, the ID line 36 is always connected to the ground line 32, the ID pin is grounded, and the impedance to ground of the ID pin is small, it is possible to determine whether the device 6 connected to the second port 12 via the data cable 5 is a master device or a slave device by detecting the impedance to ground of the ID pin.

Of course, as can be known by those skilled in the art, when a voltage supply source is set inside the USB adapter provided in the exemplary embodiment of the present disclosure, the switch switching circuit 221 is electrically connected to both the determining subunit 212 and the voltage supply source, and at this time, it may be default that the pull-up resistor 222 and the pull-down resistor 223 are both disconnected from the configuration channel 35, and when the determining subunit 212 determines that the device 6 connected to the second port 12 through the data cable 5 is a master device, the switch switching circuit 221 controls the pull-up resistor 222 to be connected to the configuration channel 35, and the pull-down resistor 223 does not operate, so that the voltage of the configuration channel pin is pulled up through the master device and the data cable 5, and the master device is connected to the mobile device 4; when the determining subunit 212 determines that the device 6 connected to the second port 12 via the data cable 5 is a slave device, the switch switching circuit 221 controls the pull-down resistor 223 to be connected to the configuration channel 35, and the pull-up resistor 222 does not operate, so that the voltage of the configuration channel pin is pulled down, and the mobile device 4 is connected to the slave device.

Example two

A further embodiment of the present disclosure provides a data transmission device, where a structural schematic diagram of the USB adapter in the first embodiment of the data transmission device is shown in fig. 1, and can be described with reference to fig. 2.

EXAMPLE III

Another embodiment of the present disclosure provides a USB adapter, including an adapter body and a USB circuit module, where the adapter body includes a first port, a second port, and a third port;

the pin of USB circuit module forms in first port, second port and third port department, and first port is used for connecting the mobile device, and for Type-C plug, second port and third port are Micro USB socket, and the second port is used for connecting main equipment such as computer, charger and portable power source through the data cable, and the third port is used for connecting slave units such as mouse, keyboard, USB flash disk and portable hard drive through the data cable.

The USB circuit module comprises a power line, a grounding line, a positive voltage data line, a negative voltage data line and a configuration channel, pins are formed on the power line, the grounding line, the positive voltage data line and the negative voltage data line at a first port, a second port and a third port, the configuration channel forms a configuration channel pin at the first port, a pull-up circuit of the configuration channel is electrically connected with the power line pin of the second port, and a pull-down circuit is electrically connected with the grounding line pin of the third port.

When the second port is connected with the master device, the master device pulls up the voltage of the configuration channel pin of the first port through the pull-up circuit, and when the third port is connected with the slave device, the slave device pulls down the voltage of the configuration channel pin of the second port through the pull-down circuit. Wherein the second port and the third port cannot operate simultaneously, as will be appreciated by those skilled in the art.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.