TWI866704B - Shared circuit layout for universal serial bus - Google Patents

Abstract

A shared circuit layout for universal serial bus arranged on a circuit board is disclosed. The shared circuit layout includes two sets of USB Type-A contacts for connecting with a USB Type-A connector and multiple USB Type-C contacts for connecting with a USB Type-C connector. Multiple first power pads of the two sets of USB Type-A contacts are connected with multiple second power pads of the multiple USB Type-C contacts, multiple first high-speed signal pads of the two sets of USB Type-A contacts are connected with multiple second high-speed signal pads of the multiple USB Type-C contacts, multiple first low-speed signal pads of the two sets of USB Type-A contacts are connected with multiple second low-speed signal pads of the multiple USB Type-C contacts, and the two sets of USB Type-A contacts are electrically connected with a CPU through the circuit board.

Description

Universal serial bus shared circuit layout

The present invention relates to a universal serial bus, and more particularly to a common circuit layout for setting up different types of universal serial bus connectors.

The circuit boards of electronic devices are usually provided with multiple connector contacts so as to provide multiple connectors. In order for the electronic devices to be able to connect to external devices and communicate with external devices through these connectors, these circuit boards also need to pre-set circuits to electrically connect the connector contacts to the central processing unit.

Furthermore, if a specific connector is to be used (such as a USB Type-C connector, an HDMI connector, or a DisplayPort connector, etc.), a corresponding control IC must be set on the circuit board of the electronic device, and the control IC must be connected to the corresponding connector contact through a line.

When manufacturing circuit boards, some manufacturers cannot know what types of connectors will be set on the circuit boards, so they will pre-set multiple types of connector contacts on the circuit boards to meet customers' future usage needs. However, pre-setting more connector contacts means that more circuits need to be pre-set on the circuit boards (because each set of connector contacts needs to be connected to the central processor), and corresponding control ICs also need to be set. In this way, not only will the wiring on the circuit board be too crowded and the size of the circuit board cannot be reduced, but it will also increase the complexity of the circuit board and the manufacturing cost.

The main purpose of the present invention is to provide a universal serial bus shared circuit layout, which allows USB Type-A contacts and USB Type-C contacts to share the circuits on the circuit board, thereby simplifying the complexity of the circuits on the circuit board.

In order to achieve the above-mentioned purpose, the universal serial bus shared circuit layout of the present invention is arranged on a circuit board and includes: Two groups of USB Type-A contacts, including at least two first power pins, four first low-speed signal pins, and eight first high-speed signal pins, wherein each group of USB Type-A contacts includes one first power pin, two first low-speed signal pins, and four first high-speed signal pins, and the two groups of USB Type-A contacts are electrically connected to a central processing unit through the circuit board; and Multiple USB Type-C contacts, including at least four second power pins, two second low-speed signal pins, and eight second high-speed signal pins; Wherein, the two first power pins in the two groups of USB Type-A contacts are electrically connected to the multiple USB The four second power pins in the Type-C contacts, the eight first high-speed signal pins in the two sets of USB Type-A contacts are electrically connected to the eight second high-speed signal pins in the multiple USB Type-C contacts, and the two first low-speed signal pins in one of the two sets of USB Type-A contacts are electrically connected to the two second low-speed signal pins in the multiple USB Type-C contacts.

As described above, the plurality of USB Type-C contacts further include a first configuration channel (CC) pin and a first sideband use (SBU) pin belonging to a first set of Type-C signals, and a second configuration channel pin and a second sideband use pin belonging to a second set of Type-C signals.

As described above, the first configuration channel pin and the second sideband use pin are connected in series with a first resistor, and the second configuration channel pin and the first sideband use pin are connected in series with a second resistor.

As mentioned above, the resistance value of the first resistor and the second resistor is 22K ohms.

As described above, the two sets of USB Type-A contacts further include two first ground pins, the multiple USB Type-C contacts further include four second ground pins, and the two first ground pins are electrically connected to the four second ground pins.

As described above, the two sets of USB Type-A contacts further include two third ground pins, the multiple USB Type-C contacts have four second ground pins belonging to the second set of USB Type-C signals, and two of the second ground pins belonging to the second set of USB Type-C signals are electrically connected to the two third ground pins.

As described above, the plurality of USB Type-C contacts have four second ground pins belonging to the first group of USB Type-C signals, and two of the second ground pins belonging to the first group of USB Type-C signals are grounded through the circuit board.

As described above, the two second low-speed signal pins belong to the first set of Type-C signals, and the multiple USB Type-C contacts do not include the two second low-speed signal pins belonging to the second set of Type-C signals.

As described above, the multiple USB Type-C contacts are used to connect a USB Type-C connector, and the two low-speed signal terminals belonging to the first group of Type-C signals on the USB Type-C connector are connected to the two second low-speed signal pins, and the two low-speed signal terminals are connected to the other two low-speed signal terminals belonging to the second group of Type-C signals on the USB Type-C connector.

As described above, the two sets of USB Type-A contacts and the multiple USB Type-C contacts are mounted on the circuit board using surface mount technology (SMT).

1: Circuit board

11: Central processing unit

2: Shared circuit layout

23: Default line

24: Shared line

21: USB Type-A connector contacts

22: USB Type-C connector contacts

221: First resistor

222: Second resistor

3: Double-layer USB Type-A connector

4: USB Type-C connector

5: USB Type-A connector

A1~A9: The first set of USB Type-A pins

B1~B9: The second set of USB Type-A pins

C1~C12: Pins belonging to the first set of USB Type-C signals

D1-D5, D8-D12: Pins belonging to the second set of USB Type-C signals

Figure 1 is a schematic diagram of the shared circuit layout of the present invention.

Figure 2A is a schematic diagram of the contact of the present invention.

Figure 2B is a schematic diagram of a double-layer USB Type-A connector.

Figure 2C is a schematic diagram of a USB Type-C connector.

Figure 2D is a schematic diagram of a USB Type-A connector.

Figure 3 is a first specific embodiment of a schematic diagram of the shared circuit layout of the present invention.

FIG4 is a second specific embodiment of a schematic diagram of a shared circuit layout of the present invention.

FIG5 is a third specific embodiment of a schematic diagram of a shared circuit layout of the present invention.

In order to understand the features and technical contents of the present invention in more detail, please refer to the following description and attached figures. However, the attached figures are for reference only and are not intended to be limiting.

First, please refer to Figure 1, which is a schematic diagram of the shared circuit layout of the present invention. The present invention provides a universal serial bus (USB) shared circuit layout (hereinafter referred to as shared circuit layout 2), and the shared circuit layout 2 includes a USB Type-A contact 21 and a USB Type-C contact 22.

Specifically, the shared circuit layout 2 of the present invention includes two sets of USB Type-A contacts 21 for connecting two USB Type-A connectors and multiple USB Type-C contacts 22 for connecting a USB Type-C connector, wherein the two sets of USB Type-A contacts 21 include a first set of USB Type-A pins A1 to A9 and a second set of USB Type-A pins B1 to B9, and the multiple USB Type-C contacts 22 include pins C1 to C12 belonging to the first set of USB Type-C signals and pins D1-D5, D8-D12 belonging to the second set of USB Type-C signals (see Figures 3, 4 and 5).

As shown in FIG. 1 , the shared circuit layout 2 of the present invention is arranged on a circuit board 1 , and a plurality of USB Type-C contacts 22 are electrically connected to two sets of USB Type-A contacts 21 through a preset line 23 on the circuit board 1 , and the two sets of USB Type-A contacts 21 are electrically connected to the central processing unit 11 through a shared line 24 on the circuit board 1 .

The technical effect of the present invention is that multiple USB Type-C contacts 22 are connected to the central processing unit 11 through the USB Type-A contacts 21, rather than connecting to the central processing unit 11 alone, so that the required line configuration on the circuit board 1 can be effectively simplified. Moreover, based on the layout of the present invention, the circuit board 1 does not need to be provided with a control IC for controlling and communicating with the USB Type-C connector, so the manufacturing cost of the circuit board 1 can also be reduced.

Please refer to Figures 2A, 2B, 2C and 2D simultaneously, wherein Figure 2A is a schematic diagram of the connector of the present invention, Figure 2B is a schematic diagram of a double-layer USB Type-A connector, Figure 2C is a schematic diagram of a USB Type-C connector, and Figure 2D is a schematic diagram of a USB Type-A connector.

As shown in FIG. 2A , the shared circuit layout 2 includes two sets of USB Type-A contacts 21 and multiple USB Type-C contacts 22, wherein the two sets of USB Type-A contacts 21 include multiple pins (including multiple pins corresponding to the first set of USB Type-A and multiple pins corresponding to the second set of USB Type-A), and the multiple USB Type-C contacts 22 include multiple pins that do not overlap with the two sets of USB Type-A contacts 21 (including multiple pins belonging to the first set of USB Type-C signals and multiple pins belonging to the second set of USB Type-C signals), and the two sets of USB Type-A contacts 21 and the multiple USB Type-C contacts 22 are disposed on the circuit board 1 by surface mount technology (SMT).

The two sets of USB Type-A contacts 21 of the present invention are used to connect two sets of USB Type-A connectors. In the embodiment shown in FIG. 2B , the two sets of USB Type-A contacts 21 are used to connect a double-layer USB Type-A connector 3, so that the two USB Type-A connectors on the double-layer USB Type-A connector 3 can be electrically connected to the central processing unit 11 through the two sets of USB Type-A contacts 21 and the common line 24 on the circuit board 1.

It is worth mentioning that the two sets of USB Type-A contacts 21 and the multiple USB Type-C contacts 22 of the present invention share the lines on the circuit board 1. Therefore, when the two sets of USB Type-A contacts 21 are provided with the double-layer USB Type-A connector 3, the multiple USB Type-C contacts 22 will be idle and cannot be used to provide other connectors.

As shown in FIG. 2C , the multiple USB Type-C contacts 22 of the present invention are used to connect the USB Type-C connector 4. In this embodiment, the USB Type-C connector 4 can be electrically connected to the central processing unit 11 through the multiple USB Type-C contacts 22, the default lines 23 between the multiple USB Type-C contacts 22 and the two sets of USB Type-A contacts 21, and the common line 24.

Similarly, since the multiple USB Type-C contacts 22 of the present invention share the lines on the circuit board 1 with the two sets of USB Type-A contacts 21, when the USB Type-C connector 4 is set on the USB Type-C contacts 22, the two sets of USB Type-A contacts 21 will be idle and cannot be used to set other connectors.

As mentioned above, the two sets of USB Type-A contacts 21 of the present invention are used to connect two sets of USB Type-A connectors (a composite double-layer USB Type-A connector 3 is used as an example in FIG. 2B ), so as shown in FIG. 2D , one of the two sets of USB Type-A contacts 21 can also be used to connect a traditional USB Type-A connector 5. When the USB Type-A connector 5 is set and connected to one of the two sets of USB Type-A contacts 21, it can be electrically connected to the central processing unit 11 through the connected set of USB Type-A contacts 21 and the common line 24 on the circuit board 1. In this embodiment, the other set of the two sets of USB Type-A contacts 21 that is not connected will be idle. Furthermore, multiple USB Type-C contacts 22 will be idle because they can no longer be equipped with USB Type-C connectors 4.

Please refer to FIG. 3 for a first specific embodiment of the schematic diagram of the shared circuit layout of the present invention. In the embodiment of FIG. 3 , two sets of USB Type-A contacts 21 include at least two first power pins A1 and B1, four first low-speed signal pins A2, A3, B2, and B3, and eight first high-speed signal pins A5, A6, A8, A9, B5, B6, B8, and B9.

Specifically, each set of USB Type-A contacts 21 includes a first power pin, two first low-speed signal pins, and four first high-speed signal pins. More specifically, the first set of USB Type-A contacts includes a first power pin A1, two first low-speed signal pins A2 and A3, and four first high-speed signal pins A5, A6, A8, and A9, and the second set of USB Type-A contacts includes a first power pin B1, two first low-speed signal pins B2 and B3, and four first high-speed signal pins B5, B6, B8, and B9. In one embodiment, the above pins of the two sets of USB Type-A contacts 21 are connected to the central processing unit 11 through the common line 24 on the circuit board 1.

In the embodiment of FIG. 3 , the plurality of USB Type-C contacts 22 include at least four second power pins C4, C9, D4, and D9, two second low-speed signal pins C6 and C7, and eight second high-speed signal pins C2, C3, C10, C11, D2, D3, D10, and D11.

In the present invention, multiple USB Type-C contacts 22 include multiple pins C1-C12 belonging to a first group of USB Type-C signals (e.g., corresponding to the upper terminals of the USB Type-C connector) and multiple pins D1-D5, D8-D12 belonging to a second group of USB Type-C signals (e.g., corresponding to the lower terminals of the USB Type-C connector). In the embodiment of FIG. 3 , the plurality of USB Type-C contacts 22 at least include two second power pins C4 and C9, two second low-speed signal pins C6 and C7, and four second high-speed signal pins C2, C3, C10, and C11 belonging to the first group of USB Type-C signals, and include two second power pins D4 and D9 and four second high-speed signal pins D2, D3, D10, and D11 belonging to the second group of USB Type-C signals. In one embodiment, the plurality of USB Type-C contacts 22 do not include the second low-speed signal pins (referred to as D6 and D7) belonging to the second USB Type-C signal.

As described above, in the present invention, multiple USB Type-C contacts 22 are electrically connected to two sets of USB Type-A contacts 21 through a preset line 23 on the circuit board 1. As shown in FIG. 3, two first power pins A1 and B1 in the two sets of USB Type-A contacts 21 are electrically connected to four second power pins C4, C9, D4, and D9 in the multiple USB Type-C contacts 22 through the preset line 23, respectively. In one embodiment, the first power pin A1 of the first set of USB Type-A contacts is electrically connected to two second power pins C9 and D4 in the multiple USB Type-C contacts 22, and the first power pin B1 of the second set of USB Type-A contacts is electrically connected to the other two second power pins C4 and D9 in the multiple USB Type-C contacts 22.

As shown in FIG. 3 , the eight first high-speed signal pins A5, A6, A8, A9, B5, B6, B8, and B9 in the two sets of USB Type-A contacts 21 are electrically connected to the eight second high-speed signal pins C2, C3, C10, C11, D2, D3, D10, and D11 in the plurality of USB Type-C contacts 22 through the preset lines 23 . In one embodiment, the four first high-speed signal pins A5, A6, A8, and A9 of the first set of USB Type-A contacts are respectively electrically connected to the four second high-speed signal pins C10, C11, D2, and D3 of the multiple USB Type-C contacts 22, and the four first high-speed signal pins B5, B6, B8, and B9 of the second set of USB Type-A contacts are respectively electrically connected to the other four second high-speed signal pins C2, C3, D10, and D11 of the multiple USB Type-C contacts 22.

In the present invention, the two first low-speed signal pins of one of the two groups of USB Type-A contacts 21 are electrically connected to the two second low-speed signal pins of the multiple USB Type-C contacts 22. In the embodiment of FIG. 3, the two first low-speed signal pins A2 and A3 of the first group of USB Type-A contacts are electrically connected to the two second low-speed signal pins C6 and C7 of the first group of USB Type-C signals of the multiple USB Type-C contacts 22. Among them, the two first low-speed signal pins B2 and B3 of the second group of USB Type-A contacts do not establish any electrical connection relationship with the multiple USB Type-C contacts 22, and the shared circuit layout 2 does not include the low-speed signal pins (called D6 and D7) belonging to the second group of USB Type-C signals.

In another embodiment, the two first low-speed signal pins B2 and B3 of the second set of USB Type-A contacts can also be electrically connected to the two second low-speed signal pins C6 and C7 of the first set of USB Type-C signals in the multiple USB Type-C contacts 22. In this embodiment, the two first low-speed signal pins A2 and A3 of the first set of USB Type-A contacts will not establish any electrical connection relationship with the multiple USB Type-C contacts 22, and are not limited to the embodiment shown in FIG. 3.

In another embodiment, the two first low-speed signal pins A2 and A3 of the first set of USB Type-A contacts may be electrically connected to the two second low-speed signal pins (for example, D6 and D7, not marked in the figure) of the second set of USB Type-C contacts 22 belonging to the second set of USB Type-C signals. In this embodiment, the two first low-speed signal pins B2 and B3 of the second set of USB Type-A contacts will not establish any electrical connection relationship with the multiple USB Type-C contacts 22, and the shared circuit layout 2 may not include the two low-speed signal pins C6 and C7 belonging to the first set of USB Type-C signals, and is not limited to the embodiment shown in FIG. 3.

In another embodiment, the two first low-speed signal pins B2 and B3 of the second group of USB Type-A contacts can also be electrically connected to the two second low-speed signal pins (for example, D6 and D7, not marked in the figure) belonging to the second group of USB Type-C signals in the multiple USB Type-C contacts 22. In this embodiment, the two first low-speed signal pins A2 and A3 of the first group of USB Type-A contacts will not establish any electrical connection relationship with the multiple USB Type-C contacts 22, and the shared circuit layout 2 may not include the two low-speed signal pins C6 and C7 belonging to the first group of USB Type-C signals, and is not limited to the embodiment shown in Figure 3.

It is worth mentioning that the shared circuit layout 2 of the present invention only connects one set of the first low-speed signal pins A2, A3 or B2, B3 of the two sets of USB Type-A contacts 21 to one set of the second low-speed signal pins C6, C7 or D6, D7 of the plurality of USB Type-C contacts 22, so only one set of the second low-speed signal pins C6, C7 or D6, D7 needs to be set on the circuit board 1. Therefore, the USB Type-C connector used to be set on multiple USB Type-C contacts 22 must include two low-speed signal terminals belonging to the first group of Type-C signals and two low-speed signal terminals belonging to the second group of Type-C signals, and the two low-speed signal terminals belonging to the first group of Type-C signals must be directly connected to the other two low-speed signal terminals belonging to the second group of Type-C signals in the USB Type-C connector, thereby sharing the second low-speed signal pins C6, C7 or D6, D7 in the multiple USB Type-C contacts 22 set on the circuit board 1.

However, the above are only different specific implementation examples of the present invention, but are not limited to them.

Through the above-described line configuration, when a USB Type-C connector (such as the USB Type-C connector 4 shown in FIG. 2C ) is provided on multiple USB Type-C contacts 22, the external device connected to the USB Type-C connector can be connected to the central processing unit 11 through multiple USB Type-C contacts 22, the preset lines 23 between multiple USB Type-C contacts 22 and two sets of USB Type-A contacts 21, the two sets of USB Type-A contacts 21, and the common line 24, and can thus operate.

As shown in FIG. 3 , the plurality of USB Type-C contacts 22 further include a first configuration channel (CC) pin C5 and a first sideband use (SBU) pin C8 belonging to the first group of Type-C signals, and a second configuration channel pin D5 and a second sideband use pin D8 belonging to the second group of Type-C signals. In the present invention, the first configuration channel pin C5 and the second sideband use pin D8 are connected in series with a first resistor 221, and the second configuration channel pin D5 and the first sideband use pin C8 are connected in series with a second resistor 222.

By setting the above resistors, the circuit board 1 does not need to be provided with a control IC corresponding to the USB Type-C protocol. Specifically, when a USB Type-C connector (e.g., a female connector) provided on a plurality of USB Type-C contacts 22 is plugged into a corresponding USB Type-C connector (e.g., a male connector), depending on the plugging direction of the male USB Type-C connector, one of the combination of the first configuration channel pin C5 and the second sideband pin D8 and the combination of the second configuration channel pin D5 and the first sideband pin C8 will be triggered. At this time, only the triggered USB Type-C signal group will be activated, and the other USB Type-C signal group will have no effect. Since it is not necessary to determine whether the USB Type-C connector is inserted forward or backward, the corresponding control IC does not need to be configured on the circuit board 1, which can save the configuration space on the circuit board 1, the complexity of the line and the manufacturing cost.

In one embodiment, the resistance value of the first resistor and the second resistor may be 22K ohms, but is not limited thereto.

Please refer to FIG. 4 for a second specific embodiment of the schematic diagram of the shared circuit layout of the present invention. As shown in FIG. 4, the two groups of USB Type-A contacts 21 in the shared circuit layout 2 of the present invention further include two first ground pins A4 and B4, wherein the first group of USB Type-A contacts includes one first ground pin A4, and the second group of USB Type-A contacts includes another first ground pin B4.

The multiple USB Type-C contacts 22 in the shared circuit layout 2 also include four second ground pins C1, C12, D1, and D12. More specifically, the multiple USB Type-C contacts 22 include two second ground pins C1 and C12 belonging to the first set of USB Type-C signals and two second ground pins D1 and D12 belonging to the second set of USB Type-C signals. In the embodiment of FIG. 4 , the two first ground pins A4 and B4 are electrically connected to the four second ground pins C1, C12, D1, and D12 through the preset line 23, respectively.

Through the circuit configuration described above, when a USB Type-C connector (such as the USB Type-C connector 4 shown in FIG. 2C ) is disposed on multiple USB Type-C contacts 22 , grounding can be performed through the two first grounding pins A4 and B4 on the two sets of USB Type-A contacts 21 .

Please refer to FIG. 5 for a third specific embodiment of the schematic diagram of the shared circuit layout of the present invention. As shown in FIG. 5, the two groups of USB Type-A contacts 21 in the shared circuit layout 2 of the present invention further include two third ground pins A7 and B7, wherein the first group of USB Type-A contacts includes one third ground pin A7, and the second group of USB Type-A contacts includes another third ground pin B7.

The multiple USB Type-C contacts 22 in the shared circuit layout 2 may include six second ground pins C1, C12, D1, D1, D12, D12, including two second ground pins C1, C12 belonging to the first set of USB Type-C signals and four second ground pins D1, D1, D12, D12 belonging to the second set of USB Type-C signals. In one embodiment, two of the second ground pins D1, D12 belonging to the second set of USB Type-C signals in the multiple USB Type-C contacts 22 are electrically connected to two third ground pins A7, B7 on the two sets of USB Type-A contacts 21 through the preset line 23.

Through the above-mentioned line configuration, the USB Type-C connector set on multiple USB Type-C contacts 22 can be further grounded through the two third ground pins A7 and B7 on the two sets of USB Type-A contacts 21.

In one embodiment, the plurality of USB Type-C contacts 22 in the shared circuit layout 2 may include a total of eight second ground pins C1, C1, C12, C12, D1, D1, D12, D12, including four second ground pins C1, C1, C12, C12 belonging to the first group of USB Type-C signals and four second ground pins D1, D1, D12, D12 belonging to the second group of USB Type-C signals.

In this embodiment, two of the second ground pins C1 and C12 belonging to the first group of USB Type-C signals in the multiple USB Type-C contacts 22 are directly grounded through the circuit board 1. In this way, the grounding function of the USB Type-C connector provided on the multiple USB Type-C contacts 22 can be further enhanced.

In the present invention, the first power pins (Vbus) A1, B1, the first low-speed signal pins (D+, D-) A2, A3, B2, B3, the first high-speed signal pins (SSRX+, SSRX-, SSTX+, SSTX-) A5, A6, A8, A9, B5, B6, B8, B9, two first ground pins (GND) A4, B4 and two third ground pins (GND) A7, B7 are the pins generally used by the standard protocol of the USB Type-A connector and have no special definition in the present invention.

In the present invention, the four second power pins (Vbus) C4, C9, D4, D9, the four second low-speed signal pins (Dp1, Dn1, Dp2, Dn2) C6, C7, D6, D7, the eight second high-speed signal pins (SSTXp1, SSTXn1, SSRXn2, SSRXp2, SSRXp1, SSRXn1, SSTXn2, SSTXp2) C2, C3, C10, C11, D2, D3, D10, D11, the eight second ground pins (GND) C1, C1, C12, C12, D1, D1, D12, D12, the two configuration communication pins (CC) A5, B5 and the two sideband use pins (SBU) A8, B8 are USB The pins commonly used in the standard protocol of the Type-C connector do not have a special definition in the present invention, but the multiple USB Type-C contacts 22 of the present invention only have two second low-speed signal pins C6, C7 or D6, D7.

Through the shared circuit layout of the present invention, the circuit board can be used for double-layer USB Type-A connector or USB Type-C connector connection based on minimal wiring, thereby effectively reducing the circuit complexity and manufacturing cost of the circuit board.

The above is only a specific description of a preferred embodiment of the present invention and is not intended to limit the patent scope of the present invention. Any other equivalent changes shall fall within the scope of the patent application described below.

2: Shared circuit layout

21: USB Type-A connector contacts

22: USB Type-C connector contacts

221: First resistor

222: Second resistor

23: Default line

A1~A9: The first set of USB Type-A pins

B1~B9: The second set of USB Type-A pins

C1~C12: Pins belonging to the first set of USB Type-C signals

D1-D5, D8-D12: Pins belonging to the second set of USB Type-C signals

Claims (10)

A universal serial bus shared circuit layout is arranged on a circuit board, comprising: two groups of USB Type-A contacts, including at least two first power pins, four first low-speed signal pins, and eight first high-speed signal pins, wherein each group of USB Type-A contacts includes one first power pin, two first low-speed signal pins, and four first high-speed signal pins, and the two groups of USB Type-A contacts are electrically connected to a central processing unit through the circuit board; and a plurality of USB Type-C contacts, including at least four second power pins, two second low-speed signal pins, and eight second high-speed signal pins; wherein the two first power pins in the two groups of USB Type-A contacts are electrically connected to the plurality of USB The four second power pins in the Type-C contacts, the eight first high-speed signal pins in the two sets of USB Type-A contacts are electrically connected to the eight second high-speed signal pins in the multiple USB Type-C contacts, and the two first low-speed signal pins in one of the two sets of USB Type-A contacts are electrically connected to the two second low-speed signal pins in the multiple USB Type-C contacts. The common circuit layout of the USB as described in claim 1, wherein the plurality of USB Type-C contacts further include a first configuration channel (CC) pin and a first sideband use (SBU) pin belonging to a first set of Type-C signals, and a second configuration channel pin and a second sideband use pin belonging to a second set of Type-C signals. A common circuit layout of a universal serial bus as described in claim 2, wherein the first configuration channel pin and the second sideband use pin are connected in series with a first resistor, and the second configuration channel pin and the first sideband use pin are connected in series with a second resistor. The universal serial bus shared circuit layout as described in claim 3, wherein the resistance value of the first resistor and the second resistor is 22K ohms. The USB shared circuit layout as described in claim 3, wherein the two sets of USB Type-A contacts further include two first ground pins, the multiple USB Type-C contacts further include four second ground pins, and the two first ground pins are electrically connected to the four second ground pins. The universal serial bus shared circuit layout as described in claim 5, wherein the two groups of USB Type-A contacts further include two third ground pins, the multiple USB Type-C contacts have two second ground pins belonging to a first group of USB Type-C signals and four second ground pins belonging to a second group of USB Type-C signals, wherein two of the second ground pins belonging to the second group of USB Type-C signals are electrically connected to the two third ground pins. A common circuit layout of the USB bus as described in claim 5, wherein the plurality of USB Type-C contacts have four second ground pins belonging to a first group of USB Type-C signals and four second ground pins belonging to a second group of USB Type-C signals, wherein two of the second ground pins belonging to the first group of USB Type-C signals are grounded through the circuit board. A USB shared circuit layout as described in claim 5, wherein the two second low-speed signal pins are pins belonging to a first group of Type-C signals, and the plurality of USB Type-C contacts do not include second low-speed signal pins belonging to a second group of Type-C signals. A universal serial bus shared circuit layout as described in claim 8, wherein the plurality of USB Type-C contacts are used to connect a USB Type-C connector, the two low-speed signal terminals belonging to the first set of Type-C signals on the USB Type-C connector are connected to the two second low-speed signal pins, and the two low-speed signal terminals are connected to the other two low-speed signal terminals belonging to the second set of Type-C signals in the USB Type-C connector. The USB shared circuit layout as described in claim 9, wherein the two sets of USB Type-A contacts and the multiple USB Type-C contacts are mounted on the circuit board using surface mount technology (SMT).

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