Universal serial bus common circuit layout

Abstract

A universal serial bus shared circuit layout is arranged on a circuit board and comprises two sets of USB Type-A contacts used for being connected with a USB Type-A connector and a plurality of USB Type-C contacts used for being connected with a USB Type-C connector, a plurality of first power supply pins in the two sets of USB Type-A contacts are connected with a plurality of second power supply pins in the plurality of USB Type-C contacts, and a plurality of second power supply pins in the plurality of USB Type-C contacts are connected with a plurality of second power supply pins in the plurality of USB Type-C connectors. A plurality of first high-speed signal pins in the two groups of USB Type-A contacts are connected with a plurality of second high-speed signal pins in the plurality of USB Type-C contacts, a plurality of first low-speed signal pins of one of the two groups of USB Type-A contacts are connected with a plurality of second low-speed signal pins in the plurality of USB Type-C contacts, and the two groups of USB Type-A contacts are electrically connected with the central processing unit through the circuit board. The USB Type-A contact and the USB Type-C contact can share the circuit on the circuit board, so that the circuit complexity on the circuit board is simplified.

Description

Technical Field

[0001] The present invention relates to a Universal Serial Bus (USB), and more particularly to a common circuit layout for setting different types of USB connectors. Background Art

[0002] Multiple connector contacts are usually provided on a circuit board of an electronic device to set multiple connectors. In order for the electronic device to connect to an external device through these connectors and communicate with the external device, lines also need to be pre-set on these circuit boards to electrically connect the connector contacts to a central processing unit.

[0003] Moreover, if a specific connector (such as a USB Type-C connector, an HDMI connector, or a DisplayPort connector, etc.) is to be used, a corresponding control IC also needs to be provided on the circuit board of the electronic device, and the control IC is connected to the corresponding connector contact through a line.

[0004] When some manufacturers manufacture circuit boards, they do not know which types of connectors will be provided on this circuit board. Therefore, multiple types of connector contacts are pre-set on the circuit board to meet the future usage needs of customers. However, presetting more connector contacts means that more lines need to be pre-set on the circuit board (because each group of connector contacts needs to be connected to the central processor), and corresponding control ICs also need to be provided. In this way, not only will the wiring on the circuit board be too crowded to reduce the volume of the circuit board, but also the circuit complexity and manufacturing cost of the circuit board will increase. Summary of the Invention

[0005] The main objective of the present invention is to provide a common circuit layout for a Universal Serial Bus, which can make the USB Type-A contacts share the lines on the circuit board with the USB Type-C contacts, thereby simplifying the circuit complexity on the circuit board.

[0006] To achieve the above objective, the common circuit layout for a Universal Serial Bus of the present invention is provided 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. Each group of USB Type-A pins includes one of the first power pins, two of the first low-speed signal pins, and four of the 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; Among them, the two first power pins in the two groups of USB Type-A contacts are electrically connected to the four second power pins in the plurality of USB Type-C contacts, the eight first high-speed signal pins in the two groups of USB Type-A contacts are electrically connected to the eight second high-speed signal pins in the plurality of USB Type-C contacts, and the two first low-speed signal pins in one of the two groups of USB Type-A contacts are electrically connected to the two second low-speed signal pins in the plurality of USB Type-C contacts.

[0007] 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 the first group of Type-C signals, and a second configuration channel pin and a second sideband use pin belonging to the second group of Type-C signals.

[0008] 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.

[0009] As described above, the resistance values of the first resistor and the second resistor are 22 K ohms.

[0010] As described above, the two groups of USB Type-A contacts further include two first ground pins, the plurality of 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.

[0011] As described above, the two groups of USB Type-A pins further include two third ground pins, the plurality of USB Type-C pins have four second ground pins belonging to the second group of USB Type-C signals, and two second ground pins belonging to the second group of USB Type-C signals are electrically connected to the two third ground pins.

[0012] 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 second ground pins belonging to the first group of USB Type-C signals are grounded through the circuit board.

[0013] As described above, the two second low-speed signal pins belong to the first group of Type-C signals, and the plurality of USB Type-C contacts do not include two second low-speed signal pins belonging to the second group of Type-C signals.

[0014] As described above, the plurality of USB Type-C contacts are used to connect to a USB Type-C connector, and 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 branched on the USB Type-C connector to connect to another two low-speed signal terminals belonging to the second group of Type-C signals.

[0015] As described above, the two groups of USB Type-A contacts and the plurality of USB Type-C contacts are arranged on the circuit board by Surface Mount Technology (SMT). BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the shared circuit layout of the present invention.

[0017] Figure 2A It is a schematic diagram of the contacts of the present invention.

[0018] Figure 2B It is a schematic diagram of a double-layer USB Type-A connector.

[0019] Figure 2C It is a schematic diagram of a USB Type-C connector.

[0020] Figure 2D It is a schematic diagram of a USB Type-A connector.

[0021] Figure 3 It is a first specific embodiment of the schematic diagram of the shared circuit layout of the present invention.

[0022] Figure 4 It is a second specific embodiment of the schematic diagram of the shared circuit layout of the present invention.

[0023] Figure 5 It is a third specific embodiment of the schematic diagram of the shared circuit layout of the present invention.

[0024] In the figure: 1: Circuit board 11: Central processing unit 2: Shared circuit layout 23: Preset line 24: Shared line 21: USB Type-A connector contact 22: USB Type-C connector contact 221: First resistor 222: Second resistor 3: Dual-layer USB Type-A connector 4: USB Type-C connector 5: USB Type-A connector A1~A9: The first group of USB Type-A pins B1~B9: The second group of USB Type-A pins C1~C12: Pins belonging to the first group of USB Type-C signals D1-D5, D8-D12: Pins belonging to the second group of USB Type-C signals. Detailed implementation manners

[0025] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and be able to implement it, but the embodiments cited do not limit the present invention.

[0026] First, please refer to Figure 1 , which is a schematic diagram of the common circuit layout of the present invention. The present invention provides a Universal Serial Bus (USB) common circuit layout (hereinafter simply referred to as the common circuit layout 2), and this common circuit layout 2 includes a USB Type-A contact 21 and a USB Type-C contact 22.

[0027] Specifically, the common circuit layout 2 of the present invention includes two groups of USB Type-A contacts 21 for connecting two USB Type-A connectors and a plurality of USB Type-C contacts 22 for connecting a USB Type-C connector, wherein the two groups of USB Type-A contacts 21 include the first group of USB Type-A pins A1~A9 and the second group of USB Type-A pins B1~B9, and the plurality of USB Type-C contacts 22 include the pins C1~C12 belonging to the first group of USB Type-C signals and the pins D1-D5, D8-D12 belonging to the second group of USB Type-C signals (refer to Figure 3 , Figure 4 and Figure 5 ).

[0028] As shown in Figure 1 , the common circuit layout 2 of the present invention is arranged on the circuit board 1, and the plurality of USB Type-C contacts 22 are electrically connected to the two groups of USB Type-A contacts 21 through a preset line 23 on the circuit board 1, and the two groups of USB Type-A contacts 21 are electrically connected to the central processing unit 11 through a common line 24 on the circuit board 1.

[0029] 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 instead of being separately connected to the central processing unit 11, so that the circuit configuration required on the circuit board 1 can be effectively simplified. Moreover, based on the layout of the present invention, a control IC for controlling and communicating with the USB Type-C connector does not need to be provided on the circuit board 1, so the manufacturing cost of the circuit board 1 can also be reduced.

[0030] Please also refer to Figure 2A , Figure 2B , Figure 2C and Figure 2D , where Figure 2A is a schematic diagram of the contacts 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.

[0031] As Figure 2A shown, the common circuit layout 2 includes two sets of USB Type-A contacts 21 and multiple USB Type-C contacts 22, where 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 arranged on the circuit board 1 by means of Surface Mount Technology (SMT).

[0032] The two sets of USB Type-A contacts 21 of the present invention are respectively used to connect two sets of USB Type-A connectors. In the Figure 2B shown embodiment, 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 respectively electrically connected to the central processing unit 11 through the two sets of USB Type-A contacts 21 and the common circuit 24 on the circuit board 1.

[0033] It is worth mentioning that the two sets of USB Type-A contacts 21 of the present invention share the circuits on the circuit board 1 with the multiple USB Type-C contacts 22. Therefore, after the double-layer USB Type-A connectors 3 are provided on the two sets of USB Type-A contacts 21, the multiple USB Type-C contacts 22 will be idle and cannot be used to provide other connectors.

[0034] For another example Figure 2C As shown, the multiple USB Type-C contacts 22 of the present invention are used to connect to 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 preset circuit 23 between the multiple USB Type-C contacts 22 and the two sets of USB Type-A contacts 21, and the shared circuit 24.

[0035] Similarly, since the multiple USB Type-C contacts 22 of the present invention share the circuits on the circuit board 1 with the two sets of USB Type-A contacts 21, after the USB Type-C connector 4 is provided on the USB Type-C contacts 22, the two sets of USB Type-A contacts 21 will be idle and cannot be used to provide other connectors.

[0036] As described above, the two sets of USB Type-A contacts 21 of the present invention are respectively used to connect two sets of USB Type-A connectors ( Figure 2B taking the composite double-layer USB Type-A connector 3 as an example). Therefore, as Figure 2D shown, one of the two sets of USB Type-A contacts 21 can of course also be used to connect a traditional USB Type-A connector 5. After the USB Type-A connector 5 is provided 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 shared circuit 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. Moreover, the multiple USB Type-C contacts 22 will also be idle because they can no longer be provided with the USB Type-C connector 4.

[0037] Continuing to refer to Figure 3 , which is the first specific embodiment of the schematic diagram of the shared circuit layout of the present invention. In Figure 3In an embodiment, the two sets of USB Type-A contacts 21 include at least two first power pins A1, B1, four first low-speed signal pins A2, A3, B2, B3, and eight first high-speed signal pins A5, A6, A8, A9, B5, B6, B8, B9.

[0038] Specifically, each set of USB Type-A contacts 21 respectively includes one 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 one first power pin A1, two first low-speed signal pins A2, A3, and four first high-speed signal pins A5, A6, A8, A9, while the second set of USB Type-A contacts includes one first power pin B1, two first low-speed signal pins B2, B3, and four first high-speed signal pins B5, B6, B8, B9. In an embodiment, the above-mentioned pins of the two sets of USB Type-A contacts 21 are respectively connected to the central processing unit 11 through the common line 24 on the circuit board 1.

[0039] In Figure 3 In an embodiment, the multiple USB Type-C contacts 22 include at least four second power pins C4, C9, D4, D9, two second low-speed signal pins C6, C7, and eight second high-speed signal pins C2, C3, C10, C11, D2, D3, D10, D11.

[0040] In the present invention, the multiple USB Type-C contacts 22 include multiple pins C1-C12 belonging to the first set of USB Type-C signals (for example, corresponding to the upper terminals of the USB Type-C connector) and multiple pins D1-D5, D8-D12 belonging to the second set of USB Type-C signals (for example, corresponding to the lower terminals of the USB Type-C connector). In Figure 3 In an embodiment, the multiple USB Type-C contacts 22 include at least two second power pins C4, C9 belonging to the first set of USB Type-C signals, two second low-speed signal pins C6, C7, and four second high-speed signal pins C2, C3, C10, C11, and include two second power pins D4, D9 belonging to the second set of USB Type-C signals and four second high-speed signal pins D2, D3, D10, D11. In an embodiment, the multiple USB Type-C contacts 22 do not include the second low-speed signal pins (referred to as D6, D7) belonging to the second USB Type-C signals.

[0041] 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 circuit 23 on the circuit board 1. As Figure 3 shown, 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 circuit 23. 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, while 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.

[0042] As Figure 3 shown, 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 eight second high-speed signal pins C2, C3, C10, C11, D2, D3, D10, and D11 in the multiple USB Type-C contacts 22 through the preset circuit 23. In one embodiment, four first high-speed signal pins A5, A6, A8, and A9 of the first set of USB Type-A contacts are electrically connected to four second high-speed signal pins C10, C11, D2, and D3 in the multiple USB Type-C contacts 22, while the four first high-speed signal pins B5, B6, B8, and B9 of the second set of USB Type-A contacts are electrically connected to the other four second high-speed signal pins C2, C3, D10, and D11 in the multiple USB Type-C contacts 22.

[0043] In the present invention, two first low-speed signal pins of one of the two sets of USB Type-A contacts 21 are electrically connected to two second low-speed signal pins in the multiple USB Type-C contacts 22. In Figure 3 an embodiment, the two first low-speed signal pins A2 and A3 of the first set of USB Type-A contacts are electrically connected to two second low-speed signal pins C6 and C7 belonging to the first set of USB Type-C signals in the multiple USB Type-C contacts 22. Among them, the two first low-speed signal pins B2 and B3 of the second set of USB Type-A contacts do not establish any electrical connection relationship with the multiple USB Type-C contacts 22, and the common circuit layout 2 does not include low-speed signal pins (referred to as D6 and D7) belonging to the second set of USB Type-C signals.

[0044] In another embodiment, two first low-speed signal pins B2 and B3 of the second set of USB Type-A contacts can also be electrically connected to two second low-speed signal pins C6 and C7 belonging to the first set of USB Type-C signals among the plurality of USB Type-C contacts 22. In this embodiment, 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 plurality of USB Type-C contacts 22, and it is not limited to the Figure 3 embodiment shown.

[0045] In another embodiment, two first low-speed signal pins A2 and A3 of the first set of USB Type-A contacts can also be electrically connected to two second low-speed signal pins (such as D6 and D7, not marked in the figure) belonging to the second set of USB Type-C signals among the plurality of USB Type-C contacts 22. In this embodiment, 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 plurality of USB Type-C contacts 22, and the shared circuit layout 2 may not include two low-speed signal pins C6 and C7 belonging to the first set of USB Type-C signals, and it is not limited to the Figure 3 embodiment shown.

[0046] In another embodiment, two first low-speed signal pins B2 and B3 of the second set of USB Type-A contacts can also be electrically connected to two second low-speed signal pins (such as D6 and D7, not marked in the figure) belonging to the second set of USB Type-C signals among the plurality of USB Type-C contacts 22. In this embodiment, 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 plurality of USB Type-C contacts 22, and the shared circuit layout 2 may not include two low-speed signal pins C6 and C7 belonging to the first set of USB Type-C signals, and it is not limited to the Figure 3 embodiment shown.

[0047] It is worth mentioning that the shared circuit layout 2 of the present invention only connects one of the first low-speed signal pins A2, A3 or B2, B3 in two groups of USB Type-A contacts 21 to one of the second low-speed signal pins C6, C7 or D6, D7 in multiple USB Type-C contacts 22. Therefore, only one set of the second low-speed signal pins C6, C7 or D6, D7 needs to be provided 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 branched 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 multiple USB Type-C contacts 22 provided on the circuit board 1.

[0048] However, the above are only different specific implementation examples of the present invention, but are not limited thereto.

[0049] With the circuit configuration described above, when a USB Type-C connector (such as Figure 2C the shown USB Type-C connector 4) is set on multiple USB Type-C contacts 22, the external device connected to this USB Type-C connector can be connected to the central processing unit 11 through multiple USB Type-C contacts 22, the preset circuit 23 between multiple USB Type-C contacts 22 and two groups of USB Type-A contacts 21, two groups of USB Type-A contacts 21, and the shared circuit 24, and then can operate.

[0050] As Figure 3 shown, multiple USB Type-C contacts 22 further include a first configuration channel (CC) pin C5 belonging to the first group of Type-C signals and a first sideband use (SBU) pin C8, 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.

[0051] With the above resistance settings, the control IC corresponding to the USB Type-C protocol does not need to be provided on the circuit board 1. Specifically, when the USB Type-C connectors (such as female connectors) provided on the plurality of USB Type-C contacts 22 are plugged by the corresponding USB Type-C connectors (such as male connectors), depending on the plugging direction of the USB Type-C male connector, one of the combination of the first configuration channel pin C5 and the second sideband usage pin D8 and the combination of the second configuration channel pin D5 and the first sideband usage pin C8 will be triggered. At this time, only the triggered group of USB Type-C signals will be activated, and the other group of USB Type-C signals will have no effect. Since it is not necessary to determine whether the USB Type-C connector is plugged in the correct or reverse direction, the corresponding control IC does not need to be configured on the circuit board 1, and the configuration space, circuit complexity, and manufacturing cost on the circuit board 1 can be saved.

[0052] In one embodiment, the resistance values of the first resistor and the second resistor can be 22K ohms, but not limited thereto.

[0053] Please continue to refer to Figure 4 , which is the second specific embodiment of the schematic diagram of the shared circuit layout of the present invention. As Figure 4 shown, the two sets of USB Type-A contacts 21 in the shared circuit layout 2 of the present invention further include two first ground pins A4, B4, wherein the first set of USB Type-A contacts includes one first ground pin A4, and the second set of USB Type-A contacts includes the other first ground pin B4.

[0054] The plurality of USB Type-C contacts 22 in the shared circuit layout 2 further include four second ground pins C1, C12, D1, D12. More specifically, the plurality of USB Type-C contacts 22 include two second ground pins C1, C12 belonging to the first group of USB Type-C signals and two second ground pins D1, D12 belonging to the second group of USB Type-C signals. In Figure 4 the embodiment, the two first ground pins A4, B4 are electrically connected to the four second ground pins C1, C12, D1, D12 through a preset line 23.

[0055] Through the above-described line configuration, when a USB Type-C connector (such as Figure 2C the USB Type-C connector 4 shown) is provided on the plurality of USB Type-C contacts 22, grounding can be performed through the two first ground pins A4, B4 on the two sets of USB Type-A contacts 21.

[0056] Please continue to refer toFigure 5 , which is the third specific embodiment of the schematic diagram of the shared circuit layout of the present invention. As Figure 5 shown, the two sets 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. The first set of USB Type-A contacts includes a third ground pin A7, and the second set of USB Type-A contacts includes another third ground pin B7.

[0057] 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 an embodiment, two of the second ground pins D1, D12 belonging to the second set of USB Type-C signals among the multiple USB Type-C pins 22 are electrically connected to the two third ground pins A7, B7 on the two sets of USB Type-A contacts 21 through a preset line 23 respectively.

[0058] Through the above-mentioned line configuration, the USB Type-C connectors provided on the multiple USB Type-C contacts 22 can be further grounded through the two third ground pins A7, B7 on the two sets of USB Type-A contacts 21.

[0059] In an embodiment, the multiple USB Type-C contacts 22 in the shared circuit layout 2 may altogether include 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 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.

[0060] In this embodiment, two of the second ground pins C1, C12 belonging to the first set of USB Type-C signals among the multiple USB Type-C pins 22 are directly grounded through the circuit board 1. Thereby, the grounding function of the USB Type-C connectors provided on the multiple USB Type-C contacts 22 can be further strengthened.

[0061] In the present invention, the first power supply 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, the two first ground pins (GND) A4, B4, and the two third ground pins (GND) A7, B7 are pins generally used in the standard agreement of the USB Type-A connector and have no special definition in the present invention.

[0062] In the present invention, the four second power supply 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 pins generally used in the standard agreement of the USB Type-C connector and have no special definition in the present invention. However, among the multiple USB Type-C contacts 22 of the present invention, only two second low-speed signal pins C6, C7 or D6, D7 are provided.

[0063] Through the shared circuit layout of the present invention, the circuit board can be used for connecting a double-layer USB Type-A connector or a USB Type-C connector based on the least amount of wiring, thereby effectively reducing the circuit complexity and manufacturing cost of the circuit board.

[0064] The above-described embodiments are merely preferred embodiments given to fully illustrate the present invention, and the protection scope of the present invention is not limited thereto. Equivalent substitutions or transformations made by those skilled in the art on the basis of the present invention are all within the protection scope of the present invention. The protection scope of the present invention shall be subject to the claims.

Claims

1. A universal serial bus sharing circuit layout is disposed on a circuit board, and is characterized in that, 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. Each group of USB Type-A pins includes one of the first power pins, two of the first low-speed signal pins, and four of the 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 four second power pins in the multiple USB Type-C contacts, the eight first high-speed signal pins in the two groups of USB Type-A contacts are electrically connected to the eight second high-speed signal pins in the multiple USB Type-C contacts, and two of the first low-speed signal pins in one of the two groups of USB Type-A contacts are electrically connected to the two second low-speed signal pins in the multiple USB Type-C contacts.

2. The universal serial bus sharing circuit layout according to claim 1, wherein The multiple USB Type-C contacts further include a first configuration channel pin and a first sideband use pin belonging to a first group of Type-C signals, and a second configuration channel pin and a second sideband use pin belonging to a second group of Type-C signals.

3. The universal serial bus sharing circuit layout according to 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.

4. The universal serial bus sharing circuit layout according to claim 3, wherein, The resistance values of the first resistor and the second resistor are 22K ohms.

5. The universal serial bus sharing circuit layout according to claim 3, wherein The two groups 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.

6. The universal serial bus sharing circuit layout according to claim 5, wherein The two groups of USB Type-A pins further include two third ground pins. The multiple USB Type-C pins have two of the second ground pins belonging to a first group of USB Type-C signals and four of the second ground pins belonging to a second group of USB Type-C signals. 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.

7. The universal serial bus sharing circuit layout according to claim 5, wherein The multiple USB Type-C contacts have four of the second ground pins belonging to a first group of USB Type-C signals and four of the second ground pins belonging to a second group of USB Type-C signals. Two of the second ground pins belonging to the first group of USB Type-C signals are grounded through the circuit board.

8. The universal serial bus sharing circuit layout according to claim 5, characterized in that, The two second low-speed signal pins are pins belonging to a first group of Type-C signals, and the multiple USB Type-C contacts do not include second low-speed signal pins belonging to a second group of Type-C signals.

9. The universal serial bus sharing circuit layout according to claim 8, wherein The multiple USB Type-C contacts are used to connect a USB Type-C connector. 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 branched in the USB Type-C connector to connect to another two low-speed signal terminals belonging to the second group of Type-C signals.

10. The universal serial bus sharing circuit layout according to claim 9, characterized in that, The two groups of USB Type-A contacts and the multiple USB Type-C contacts are arranged on the circuit board by surface mount technology.

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