CN217085744U

CN217085744U - USB data switching circuit and PCB circuit board

Info

Publication number: CN217085744U
Application number: CN202220875045.3U
Authority: CN
Inventors: 杨志豪; 杨坤; 陈晴
Original assignee: Guangdong Takstar Electronic Co ltd
Current assignee: Guangdong Takstar Electronic Co ltd
Priority date: 2022-04-08
Filing date: 2022-04-08
Publication date: 2022-07-29
Anticipated expiration: 2032-04-08

Abstract

The utility model relates to a technical field that USB data was used especially relates to a USB data switching circuit and PCB circuit board. The USB data switching device comprises a USB data switching module and a control circuit; the USB data switching module comprises an input end, two output ports and a control enabling end, and can switch the output ports according to an input signal of the control enabling end; the control circuit comprises an input power supply, a first divider resistor, a second divider resistor and a switch control module, wherein the first divider resistor and the second divider resistor are connected in series, and the input power supply is grounded after passing through the first divider resistor and the second divider resistor; and a node between the first voltage-dividing resistor and the second voltage-dividing resistor is connected with the control enabling end of the USB data switching module and is grounded through the switch control module. The utility model discloses circuit structure is simple, and is with low costs, guarantees that chip upgrading can not occupy main communication mouth, improves the availability factor of USB interface.

Description

USB data switching circuit and PCB circuit board

Technical Field

The utility model relates to a technical field that USB data was used especially relates to a USB data switching circuit and PCB circuit board.

Background

With the social development, the updating speed of the electronic equipment is also fast. At present, a plurality of chips generally exist in electronic equipment, when the chips are upgraded, data upgrading needs to be carried out through a USB interface, the chips are generally upgraded through corresponding USB interfaces at present, one USB interface can only transmit one group of data, a main communication port possibly needs to be occupied when a plurality of chips are upgraded, and application efficiency is low. At present, USB data switching equipment or circuits are lacked, and the upgrading requirements of the current electronic equipment cannot be met.

Disclosure of Invention

The utility model discloses a solve current USB interface and only correspond a set of data, use the technical problem that the efficiency is low, provide a USB data switching circuit and PCB circuit board.

In order to solve the technical problem, the technical scheme of the utility model as follows:

a USB data switching circuit comprises a USB data switching module and a control circuit; the USB data switching module comprises an input end, two output ports and a control enabling end, and can switch the output ports according to an input signal of the control enabling end; the control circuit comprises an input power supply, a first voltage-dividing resistor, a second voltage-dividing resistor and a switch control module, wherein the first voltage-dividing resistor and the second voltage-dividing resistor are connected in series, and the input power supply is grounded after passing through the first voltage-dividing resistor and the second voltage-dividing resistor; the node between the first voltage-dividing resistor and the second voltage-dividing resistor is connected with the control enabling end of the USB data switching module and is grounded through the switch control module, and the switch control module controls the switching of the output port of the USB data switching module by controlling the on-off state between the node between the first voltage-dividing resistor and the second voltage-dividing resistor and the ground wire.

Further, the switch control module comprises an electronic switch and a first triode; two ends of the electronic switch are respectively connected with the input power supply and the base electrode of the first triode; and the collector of the first triode is connected with a node between the first divider resistor and the second divider resistor, and the emitter of the first triode is grounded.

Furthermore, a filtering module is connected between the electronic switch and the first triode in parallel, the filtering module comprises a first capacitor and a first resistor, one end of the first capacitor and one end of the first resistor are respectively connected with the base electrode of the first triode, and the other end of the first capacitor and the other end of the first resistor are grounded.

Furthermore, the input end of the USB data switching module is provided with two input terminal pins, and the two input terminal pins are respectively connected in parallel with a capacitor and then grounded.

Further, the USB data switching module includes a USB switching chip, the USB switching chip includes two output ports, and the USB switching chip switches the output ports according to the level of the control enable terminal.

Further, the USB switching chip adopts a WAS7227 chip.

Furthermore, the power supply end of the USB switching chip is connected with the 3.3V power supply through the second filtering module.

Further, the input power supply voltage of the control circuit is 5V.

The utility model also provides a PCB circuit board, including foretell USB data switching circuit.

Furthermore, the PCB circuit board comprises two access chips, and the access chips are connected with the USB interface through a USB data switching circuit.

The utility model discloses a switch accomplishes the USB data and switches, can realize the switching between two USB output ports through this circuit, make a port can correspond two chips of upgrading, its circuit structure is simple, and is with low costs, the switching of USB port output data is accomplished through the flat switching of the enable end that USB switched the chip, the reliability is high, realize freely switching of two sets of data, the upgrading cost of the inside chip of product has been reduced, guarantee that its upgrading can not occupy main communication port, improve the availability factor of USB interface.

Drawings

Fig. 1 is a circuit structure diagram of the USB data switching circuit according to an embodiment of the present invention.

Fig. 2 is a circuit structure diagram of a control circuit according to an embodiment of the present invention.

Fig. 3 is a circuit block diagram of the USB data switching circuit according to an embodiment of the present invention.

The USB data switching module is 10, and the control circuit is 20.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention will be combined to clearly and completely describe the technical solutions of the embodiments of the present invention. The described embodiments are some, but not all embodiments of the invention.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example one

Fig. 1 shows a circuit configuration diagram of a USB data switching circuit in the present embodiment; FIG. 2 is a circuit diagram of the control circuit in the present embodiment; fig. 3 is a circuit block diagram of the USB data switching circuit according to the present embodiment.

As shown in fig. 1-3, in view of the current USB interface and product data generally adopting a mode that a group of interfaces corresponds to one output, in the multi-chip product upgrading process, there are problems such as the main communication port being occupied, and the USB interface is low in utilization rate and not practical and reliable enough. The present embodiment provides a USB data switching circuit, which is mainly used for implementing switching of USB data output ports, so that USB data output to two output ports can be completed by using one USB input port, for example, when a chip is upgraded, if there are two chips in a product, data upgrade to two chips by one USB interface can be implemented by using the USB data switching circuit.

Specifically, the USB data switching circuit in this embodiment includes a USB data switching module 10 and a control circuit 20, where the USB data switching module 10 is mainly used to implement switching of output ports of USB data, and the control circuit 20 is used to implement controlling switching of the USB data output ports according to user requirements. Specifically, the control circuit 20 controls the level of the enable terminal to be high or low by controlling the USB data switching module 10, so as to implement the output port of the USB switching chip U1 in the USB data switching module 10, thereby achieving the purpose of switching the output of the USB data.

More specifically, in terms of the USB data switching module 10, it specifically includes an input end, two output ports, and a control enable end, and the USB data switching module 10 can switch the output ports according to an input signal of the control enable end. The input end can be connected with an external USB interface and used for accessing external USB data, and the output end is used for outputting the USB data accessed from the input end. Of course, both USB interfaces are not capable of outputting USB data, but determine which output port to output through the control enable terminal of the USB data switching module 10. For example, in this embodiment, the USB data switching module 10 includes a first output port and a second output port, and after being powered on, the first output port is output by default, and at this time, the USB data signal enters from the input port of the USB data switching module 10 and is output from the first output port; when the level of the control enable terminal is switched, the USB data signal is input from the input port of the USB data switching module 10 and output from the second output port, so that the data output at the output port can be switched.

In terms of the control circuit 20, the control circuit 20 in this embodiment includes an input power supply, a first voltage-dividing resistor R1, a second voltage-dividing resistor R2, and a switch control module, where the first voltage-dividing resistor R1 and the second voltage-dividing resistor R2 are connected in series, and the input power supply is grounded through the first voltage-dividing resistor R1 and the second voltage-dividing resistor R2; the node between the first voltage-dividing resistor R1 and the second voltage-dividing resistor R2 is connected to the control enable terminal of the USB data switching module 10. After power-on, the control enable terminal of the USB data switching module 10 can receive the voltage divided by the first voltage dividing resistor R1 and the second voltage dividing resistor R2, and is at a high level at this time. And the node between the first voltage-dividing resistor R1 and the second voltage-dividing resistor R2 is also grounded through the switch control module, when the switch is pressed down, the switch control module pulls the control enable end of the USB data switching module 10 low, so that the control enable end is at a high level, and the USB data switching module 10 switches its output port according to the level of the control enable end. That is, the switch control module in the control circuit 20 controls the switching of the output port of the USB data switching module 10 by controlling the on-off state between the node between the first voltage-dividing resistor R1 and the second voltage-dividing resistor R2 and the ground.

The benefit of this embodiment lies in, this circuit adjusts the level height that USB data switches module 10 control enable end through the on-off control module, and then accomplish the switching of USB data on two output ports, make an input port can export to two required output ports as required on, and then reach the switching of USB data, this circuit structure is simple, low cost, switch the switching of USB port output data through the control enable end level switching of USB switching chip U1, high reliability, realize the free switching of two sets of data, the upgrading cost of the chip inside the product has been reduced, guarantee that its upgrading can not occupy the main communication mouth, improve the availability factor of USB interface.

Example two

The present embodiment also provides a USB data switching circuit, which includes a USB data switching module 10 and a control circuit 20; the USB data switching module 10 includes an input port, two output ports, and a control enable port, and the USB data switching module 10 can switch the output ports according to an input signal of the control enable port; the control circuit 20 comprises an input power supply, a first voltage-dividing resistor R1, a second voltage-dividing resistor R2 and a switch control module, wherein the first voltage-dividing resistor R1 and the second voltage-dividing resistor R2 are connected in series, and the input power supply is grounded through the first voltage-dividing resistor R1 and the second voltage-dividing resistor R2; the node between the first voltage-dividing resistor R1 and the second voltage-dividing resistor R2 is connected to the control enable end of the USB data switching module 10, and is grounded through the switch control module, and the switch control module controls the switching of the output port of the USB data switching module 10 by controlling the on-off state between the node between the first voltage-dividing resistor R1 and the second voltage-dividing resistor R2 and the ground line.

Specifically, the present embodiment is different from the first embodiment in that the present embodiment further provides the following detailed description, which is made with reference to fig. 1 to 3.

As an implementation manner of this embodiment, in terms of the switch control module, specifically, the switch control module includes an electronic switch SW1 and a first transistor Q1, wherein, in terms of connection, two ends of the electronic switch SW1 are respectively connected to an input power source and a base of the first transistor Q1; the collector of the first triode Q1 is connected to the node between the first voltage-dividing resistor R1 and the second voltage-dividing resistor R2, and the emitter is grounded. Also preferably, a filtering module is connected in parallel between the electronic switch SW1 and the first transistor Q1, and the filtering module includes a first capacitor and a first resistor, one end of the first capacitor and one end of the first resistor are respectively connected to the base of the first transistor Q1, and the other end of the first capacitor and one end of the first resistor are grounded. Also preferably, the input end of the USB data switching module 10 is provided with two input pins, and the two input pins are respectively connected in parallel with a capacitor and then grounded. Preferably, the input power supply voltage of the control circuit 20 is 5V.

When the switch control module is not actuated, that is, when the electronic switch SW1 is not pressed to be triggered, the control enable end of the USB data switching module 10 is driven by the voltage dividing resistor to be at a high level, and at this time, the output port is at the default output port or the first output port; when the switch control module is activated, i.e. the electronic switch SW1 is pressed and triggered, the control enable terminal of the USB data switching module 10 is driven by the voltage dividing resistor to be at a low level, and at this time, the output port is at the second output port.

Preferably, the USB data switching module 10 includes a USB switching chip U1, wherein the USB switching chip U1 includes two output ports, and the USB switching chip U1 switches the output ports according to the level of the control enable terminal. For a better operational experience, in an embodiment, the USB switch chip U1 employs a WAS7227 chip. Of course, any other suitable switching chip may be adopted for the USB switching chip U1 of the present embodiment. Preferably, the power supply terminal of the USB switching chip U1 is connected to the 3.3V power supply through the second filtering module.

The benefit of this embodiment lies in, this circuit utilizes USB to switch the USB data output port of the USB interface that the chip U1 and the electronic switch SW1 in the control circuit 20 switched the input, make an input port export to two required output ports as required on, and then reach the switching of USB data, this circuit structure is simple, low cost, switch the switching that the control of chip U1 was switched to the control enable end level through USB and accomplish USB port output data, high reliability, realize the free switching of two sets of data, the upgrading cost of the chip inside the product has been reduced, guarantee that its upgrading can not occupy the main communication mouth, improve the availability factor of USB interface.

EXAMPLE III

The embodiment provides a PCB circuit board, which includes a USB data switching circuit, the PCB circuit board includes two access chips, the access chips are connected with a USB interface through the USB data switching circuit, the two access chips are respectively connected with the USB interface by using the USB data switching circuit, so that the USB data of the two chips can be upgraded by using one USB interface.

Specifically, the USB data switching circuit includes a USB data switching module 10 and a control circuit 20; the USB data switching module 10 includes an input port, two output ports, and a control enable port, and the USB data switching module 10 can switch the output ports according to an input signal of the control enable port; the control circuit 20 comprises an input power supply, a first voltage-dividing resistor R1, a second voltage-dividing resistor R2 and a switch control module, wherein the first voltage-dividing resistor R1 and the second voltage-dividing resistor R2 are connected in series, and the input power supply is grounded through the first voltage-dividing resistor R1 and the second voltage-dividing resistor R2; the node between the first voltage-dividing resistor R1 and the second voltage-dividing resistor R2 is connected to the control enable end of the USB data switching module 10, and is grounded through the switch control module, and the switch control module controls the switching of the output port of the USB data switching module 10 by controlling the on-off state between the node between the first voltage-dividing resistor R1 and the second voltage-dividing resistor R2 and the ground line.

More specifically, the PCB of the present embodiment employs the USB data switching circuit in the first embodiment or the second embodiment.

In the description of the present invention, it is to be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the equipment or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the present disclosure, unless otherwise expressly stated or limited, the first feature may comprise both the first and second features directly contacting each other, and also may comprise the first and second features not being directly contacting each other but being in contact with each other by means of further features between them. Also, the first feature being above, on or above the second feature includes the first feature being directly above and obliquely above the second feature, or merely means that the first feature is at a higher level than the second feature. A first feature that underlies, and underlies a second feature includes a first feature that is directly under and obliquely under a second feature, or simply means that the first feature is at a lesser level than the second feature.

While the invention has been described in conjunction with the specific embodiments set forth above, it is evident that many alternatives, modifications, and variations will be apparent to those skilled in the art in light of the foregoing description. Accordingly, it is intended to embrace all such alternatives, modifications, and variations that fall within the spirit and scope of the appended claims.

Claims

1. A USB data switching circuit is characterized by comprising a USB data switching module and a control circuit; the USB data switching module comprises an input end, two output ports and a control enabling end, and can switch the output ports according to an input signal of the control enabling end; the control circuit comprises an input power supply, a first voltage-dividing resistor, a second voltage-dividing resistor and a switch control module, wherein the first voltage-dividing resistor and the second voltage-dividing resistor are connected in series, and the input power supply is grounded after passing through the first voltage-dividing resistor and the second voltage-dividing resistor; the node between the first voltage-dividing resistor and the second voltage-dividing resistor is connected with the control enabling end of the USB data switching module and is grounded through the switch control module, and the switch control module controls the switching of the output port of the USB data switching module by controlling the on-off state between the node between the first voltage-dividing resistor and the second voltage-dividing resistor and the ground wire.

2. The USB data switching circuit of claim 1, wherein the switch control module comprises an electronic switch and a first transistor; two ends of the electronic switch are respectively connected with the input power supply and the base electrode of the first triode; and the collector of the first triode is connected with a node between the first divider resistor and the second divider resistor, and the emitter of the first triode is grounded.

3. The USB data switching circuit of claim 2, wherein a filter module is connected between the electronic switch and the first transistor in parallel, the filter module includes a first capacitor and a first resistor, one end of the first capacitor and one end of the first resistor are connected to the base of the first transistor, and the other end of the first capacitor and one end of the first resistor are connected to ground.

4. The USB data switching circuit according to claim 1, wherein the input terminal of the USB data switching module has two input terminal pins, and the two input terminal pins are respectively connected in parallel with a capacitor and then grounded.

5. The USB data switching circuit of claim 1, wherein the USB data switching module comprises a USB switching chip, the USB switching chip comprises two output ports, and the USB switching chip switches the output ports according to the level of the control enable terminal.

6. The USB data switching circuit of claim 5, wherein the USB switching chip is a WAS7227 chip.

7. The USB data switching circuit of claim 5, wherein the power source terminal of the USB switching chip is connected to a 3.3V power source through the second filtering module.

8. The USB data switching circuit of claim 1, wherein the input power voltage of the control circuit is 5V.

9. A PCB circuit board comprising the USB data switching circuit of any one of claims 1-8.

10. The PCB circuit board of claim 9, wherein the PCB circuit board comprises two access chips, and the access chips are connected to the USB interface through a USB data switching circuit.