USB interface expansion circuit and terminal

Abstract

The utility model relates to the field of interface expansion, in particular to a USB interface expansion circuit and a terminal. The USB interface expansion circuit comprises an interface expansion module, a first interface branch, a second interface branch and a third interface branch, the interface expansion module is connected with main control equipment and expands one USB interface into a plurality of USB interfaces, and the first interface branch is connected with the interface expansion module and used for being connected with USB interface equipment; the second interface branch is connected with the interface expansion module and is used for being connected with SATA interface equipment; and the third interface branch is connected with the interface expansion module and is used for being connected with M.2 interface equipment, so that one USB interface is expanded into a plurality of different types of interfaces for use.

Description

Technical Field

[0001] The utility model relates to the field of interface expansion, in particular to a USB interface expansion circuit and a terminal. Background Art

[0002] The USB interface is the most common high-speed bus interface for computers and computer peripherals, so more and more devices use the USB interface as an interface for power supply and data communication. In some special cases, such as mass production testing, it is necessary to use the USB interface, SATA interface and M.2 interface to connect the device to the test host in the same time period. The common method is to use a USB converter to convert the USB interface to adapt to the interface of the current device. However, this method requires frequent plugging and unplugging of the USB converter, which is not only inefficient but also easy to damage the test host and / or USB converter. Utility Model Content

[0003] In order to solve the problem in the prior art that the USB converter needs to be repeatedly plugged in and out and replaced when using the USB interface, SATA interface and M.2 interface in the same time period, the utility model provides a USB interface expansion circuit and a terminal.

[0004] In a first aspect, an embodiment of the utility model provides a USB interface expansion circuit, comprising:

[0005] An interface expansion module connected to a main control device;

[0006] A first interface branch, connected to the interface expansion module, for connecting a USB interface device;

[0007] A second interface branch, connected to the interface expansion module, for connecting to a SATA interface device;

[0008] The third interface branch is connected to the interface expansion module and is used to connect to an M.2 interface device.

[0009] In some embodiments, the interface expansion module includes a USB hub controller provided with at least three downstream ports;

[0010] The upstream port of the USB hub controller is connected to the main control device; the first port of the downstream port of the USB hub controller is connected to the first interface branch; the second port of the downstream port of the USB hub controller is connected to the second interface branch; the third port of the downstream port of the USB hub controller is connected to the third interface branch.

[0011] In some embodiments, the first interface branch includes a TYPE-A standard interface socket;

[0012] The TYPE-A standard interface socket is connected to the interface expansion module, and the USB interface device is connected to the USB interface expansion circuit via the TYPE-A standard interface socket.

[0013] In some embodiments, the second interface branch includes a USB-SATA bridge module and a SATA interface socket;

[0014] The USB-SATA bridge module is connected to the interface expansion module, the SATA interface socket is connected to the USB-SATA bridge module, and the SATA interface device is connected to the USB interface expansion circuit via the SATA interface socket.

[0015] In some embodiments, the third interface branch includes a USB-M.2 bridge module and an M.2 interface socket;

[0016] The USB-M.2 bridge module is connected to the interface expansion module, the M.2 interface socket is connected to the USB-M.2 bridge module, and the M.2 interface device is connected to the USB interface expansion circuit via the M.2 interface socket.

[0017] In some embodiments, it further includes a TYPE-A input interface, the TYPE-A input interface is connected to the interface expansion module, and the main control device is connected to the interface expansion module through the TYPE-A input interface.

[0018] In some embodiments, a power module is further included, wherein the power module includes a power input module and a power conversion module;

[0019] The power input module is connected to the power input;

[0020] The power conversion module is connected to the power input module and is used to convert the 12V voltage into a 5V voltage.

[0021] In some embodiments, a power control module is also included, which is connected to the first interface branch, the second interface branch and the third interface branch, and is used to control the power on of the first interface branch, the second interface branch and the third interface branch.

[0022] In a second aspect, an embodiment of the utility model further provides a terminal, wherein the terminal has the USB interface expansion circuit as described in any of the above embodiments.

[0023] One or more technical solutions provided in the embodiments of the present utility model have at least the following technical effects or advantages:

[0024] A USB interface expansion circuit proposed in an embodiment of the utility model expands a USB interface into multiple USB interfaces by setting an interface expansion module; by setting a first interface branch connected to the interface expansion module for connecting a USB interface device; by setting a second interface branch connected to the interface expansion module for connecting a SATA interface device; by setting a third interface branch connected to the interface expansion module for connecting an M.2 interface device, thereby expanding a USB interface into multiple different types of interfaces for easy use.

[0025] In addition, a power control module is provided to control the power-on of the first interface branch, the second interface branch and the third interface branch, so as to make the use convenient and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0027] Figure 1 This is a functional framework diagram of a USB interface expansion circuit in one embodiment of the utility model;

[0028] Figure 2 This is a circuit structure diagram of an interface expansion module in a USB interface expansion circuit in one embodiment of the utility model;

[0029] Figure 3 This is a schematic diagram of the circuit structure of a first interface branch in a USB interface expansion circuit in one embodiment of the utility model;

[0030] Figure 4 This is a schematic diagram of the circuit structure of a USB-SATA bridge module in a USB interface expansion circuit in one embodiment of the utility model;

[0031] Figure 5 This is a schematic diagram of the circuit structure of a SATA interface socket in a USB interface expansion circuit in one embodiment of the utility model;

[0032] Figure 6 It is a circuit structure diagram of a USB-M.2 bridge module in a USB interface expansion circuit in one embodiment of the utility model;

[0033] Figure 7 This is a schematic diagram of the circuit structure of an M.2 interface socket in a USB interface expansion circuit in one embodiment of the utility model;

[0034] Figure 8 It is a circuit structure diagram of a TYPE-A input interface in a USB interface expansion circuit in one embodiment of the utility model;

[0035] Fig. 9This is a schematic diagram of the circuit structure of a power input module in a USB interface expansion circuit in one embodiment of the utility model;

[0036] Fig.10 This is a schematic diagram of the circuit structure of a power conversion module in a USB interface expansion circuit in one embodiment of the utility model;

[0037] Fig.11 The utility model is a circuit structure diagram of a power control module in a USB interface expansion circuit in one embodiment. DETAILED DESCRIPTION

[0038] The following will clearly and completely describe the concept, specific structure and technical effects of the utility model in combination with the embodiments and drawings, so as to fully understand the purpose, characteristics and effects of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, other embodiments obtained by technicians in this field without creative work are all within the scope of protection of the utility model. In addition, all the connection / connection relationships involved in the patent do not refer to the direct connection of components, but refer to the formation of a better connection structure by adding or reducing connection accessories according to the specific implementation situation. The various technical features in the creation of the utility model can be combined interchangeably without conflicting with each other.

[0039] The USB interface is the most common high-speed bus interface for computers and computer peripherals, so more and more devices use the USB interface as an interface for power supply and data communication. In some special cases, such as mass production testing, it is necessary to repeatedly use the USB interface, M.2 interface, and SATA interface to connect the device to the test host in the same period of time. The common method is to use different USB converters to convert the USB interface to an M.2 interface or a SATA interface to adapt to the current device interface according to the needs. However, this method requires repeated plugging and unplugging of the USB converter, which is not only inefficient, but also easy to cause damage to the test host and / or the USB converter.

[0040] In order to solve the above problems, an embodiment of the utility model proposes a USB interface expansion circuit.

[0041] See also Figure 1 The USB interface expansion circuit proposed in the embodiment of the utility model includes an interface expansion module, a first interface circuit, a second interface circuit and a third interface circuit. The interface expansion module is connected to the main control device; the first interface branch is connected to the interface expansion module, which is used to connect the USB interface device; the second interface branch is connected to the interface expansion module, which is used to connect the SATA interface device; the third interface branch is connected to the interface expansion module, which is used to connect the M.2 interface device.

[0042] Its working principle is: the interface expansion module expands a USB master interface of the main control device into multiple USB slave interfaces, the first interface branch is connected to one of the USB slave interfaces to connect the USB interface device, so that the USB interface device can transmit data with the main control device; the second interface branch is connected to one of the USB slave interfaces, converting the USB slave interface into a SATA interface to connect the SATA interface device, so that the SATA interface device can transmit data with the main control device; the third interface branch is connected to one of the USB slave interfaces, converting the USB slave interface into an M.2 interface to connect the M.2 interface device, so that the M.2 interface device can transmit data with the main control device, thereby realizing the expansion of one USB master interface into multiple different types of interfaces to adapt to devices with different types of interfaces.

[0043] The interface expansion module includes a USB hub controller provided with at least three downstream ports. The USB hub controller can expand one USB port into multiple USB ports and control and manage the data transmission of the multiple USB ports.

[0044] The upstream port of the USB hub controller is connected to the main control device, the first port of the downstream port of the USB hub controller is connected to the first interface branch, the second port of the downstream port of the USB hub controller is connected to the second interface branch, and the third port of the downstream port of the USB hub controller is connected to the third interface branch. In a USB interface expansion circuit proposed in an embodiment of the utility model, a TYPE-A input interface is also included, and the TYPE-A input interface is connected to the interface expansion module. Specifically, the TYPE-A input interface is connected to the upstream port of the USB hub controller, and the main control device is connected to the upstream port of the USB hub controller through the TYPE-A input interface to achieve connection with the interface expansion module.

[0045] See also Figure 2 In the embodiment of the utility model, the chip model used by the USB hub controller is RTS5420, which is a USB3.2 Gne2x1 hub controller with four downstream ports, complies with USB3.2 Gen2x1 and USB2.0 specifications and is backward compatible with USB3.2 Gen1 (USB3.0), USB1.1 and USB1.0 specifications.

[0046] Among them, the upstream ports of the USB hub controller are the ports USP_D+, USP_D-, USP_TX+, USP_TX-, USP_RX+ and USP_RX- of RTS5420. USP_D+ and USP_D- are a pair of USB2.0 differential signal terminals for data exchange; USP_TX+ and USP_TX- are used for differential output of 5Gbps ultra-high-speed USB signals; USP_RX+ and USP_RX- are used for differential input of 5Gbps ultra-high-speed USB signals.

[0047] The first port of the downstream port of the USB hub controller is the port DSP1_D+, DSP1_D-, DSP1_TX+, DSP1+_TX-, DSP1_RX+ and DSP1_RX- of RTS5420. DSP1_D+ and DSP1_D- are a pair of USB2.0 differential signal terminals for data exchange; DSP1_TX+ and DSP1_TX- are used for differential output of 5Gbps ultra-high-speed USB signals; DSP1_RX+ and DSP1_RX- are used for differential input of 5Gbps ultra-high-speed USB signals.

[0048] The second port of the downstream port of the USB hub controller is the ports DSP2_D+, DSP2_D-, DSP2_TX+, DSP2_TX-, DSP2_RX+ and DSP2_RX- of RTS5420. DSP2_D+ and DSP2_D- are a pair of USB2.0 differential signal terminals for data exchange; DSP2_TX+ and DSP2_TX- are used for differential output of 5Gbps ultra-high-speed USB signals; DSP2_RX+ and DSP2_RX- are used for differential input of 5Gbps ultra-high-speed USB signals.

[0049] The third port of the downstream port of the USB hub controller is the ports DSP3_D+, DSP3_D-, DSP3_TX+, DSP3_TX-, DSP3_RX+ and DSP3_RX- of RTS5420. DSP3_D+ and DSP3_D- are a pair of USB2.0 differential signal terminals for data exchange; DSP3_TX+ and DSP3_TX- are used for differential output of 5Gbps ultra-high-speed USB signals; DSP3_RX+ and DSP3_RX- are used for differential input of 5Gbps ultra-high-speed USB signals.

[0050] See also Figure 8The ports D-, D+, RX-, RX+, TX_, and TX+ of the TYPE-A input interface CON4 are respectively connected to the upstream ports USP_D-, USP_D+, USP_RX-, USP_RX+, USP_TX, and USP_TX+ of the USB hub controller RST5420. The master control device can be connected to the USB hub controller RST5420 through the TYPE-A input interface CON4 and exchange data.

[0051] The first interface branch includes a TYPE-A standard interface socket, which is connected to the interface expansion module. Specifically, the TYPE-A standard interface socket is connected to the first port of the downstream port of the USB hub controller, and the USB interface device is connected to the interface expansion circuit through the TYPE-A standard interface socket to realize data transmission with the main control device.

[0052] See also Figure 3 The ports D-, D+, RX-, RX+, TX_, and TX+ of the TYPE-A standard interface socket CON1 correspond to DSP1_D+, DSP1_D-, DSP1_TX+, DSP1+_TX-, DSP1_RX+, and DSP1_RX- of the first port of the downstream port of the USB hub controller RST5420 respectively. The USB interface device can be connected to the USB hub controller RST5420 through the TYPE-A standard interface socket CON1, and then connected to the main control device and exchange data.

[0053] The second interface branch includes a USB-SATA bridge module and a SATA interface socket. The USB-SATA bridge module is connected to the interface expansion module. The SATA interface device is connected to the interface expansion circuit through the SATA interface socket to realize data transmission with the main control device.

[0054] Among them, the SATA interface device is connected to the USB-SATA bridge module through the SATA interface socket. After being converted by the USB-SATA bridge module, the SATA interface device can be connected to the second port of the downstream port of the USB hub controller as a standard USB interface device and be recognized and used by the main control device.

[0055] See also Figure 4 and Figure 5The USB-SATA bridge module includes a USB-SATA bridge ASM235C. The ports UDP, UDM, URXP1, URXN1, UTXP1, and UTXN1 of the USB-SATA bridge ASM235C are respectively connected to the second port DSP2_D+, DSP2_D-, DSP2_TX+, DSP2_TX-, DSP2_RX+, and DSP2_RX- of the downstream port of the USB hub controller. The ports STXP, STXN, SRXN, and SRXP of the USB-SATA bridge ASM235C are respectively connected to the ports TXP, TXN, RXN, and RXP of the SATA interface socket J60. The SATA interface device can be connected to the USB-SATA bridge module through the SATA interface socket J60. After conversion by the USB-SATA bridge module, the SATA interface device can be connected to the USB hub controller RTS5420 as a standard USB3.1 device and be identified and used.

[0056] The third interface branch includes a USB-M.2 bridge module and an M.2 interface socket. The USB-M.2 bridge module is connected to the interface expansion module. The M.2 interface device is connected to the interface expansion circuit through the M.2 interface socket to realize data transmission with the main control device.

[0057] Among them, the M.2 interface device is connected to the USB-M.2 bridge module through the M.2 interface socket. After being converted by the USB-M.2 bridge module, the M.2 interface device can be connected to the third port of the downstream port of the USB hub controller as a standard USB interface device and recognized and used by the main control device.

[0058] See also Figure 6 and Figure 7The USB-M.2 bridge module includes a USB bridge RTL9210. The USB bridge RTL9210 is used to combine a USB device with a PCI Express (PCIe) controller and / or a SATA controller. Through the M.2 interface, the USB bridge RTL9210 can automatically switch between USB to PCIe mode or USB to SATA mode. The ports HSDM, HSDP, USB_TXP1, USB_TXN1, USB_RXP1, and USB_RXN1 of the USB bridge RTL9210 correspond respectively to DSP3_D+, DSP3_D-, DSP3_RX+, DSP3_RX-, DSP3_TX+, and DSP3_TX- of the third port connected to the downstream port of the USB hub controller RST5420, and the ports PCIE_TXOP_0, PCIE_TXON_0, PCIE_TXON_1, and PCIE_TXOP_1 of the USB bridge RTL9210 correspond respectively to PCIE_TXOP_0, PCIE_TXON_0, PCIE_TXON_1, and PCIE_TXOP_1 of the port connected to the M.2 interface socket J59. The M.2 interface device can be connected to the USB-M.2 bridge module through the M.2 interface socket J59. After conversion by the USB-M.2 bridge module, the M.2 interface device can be connected to the USB hub controller RTS5420 as a standard USB3.1 device and be identified and used.

[0059] An interface expansion circuit provided in an embodiment of the utility model further includes a power module, and the power module includes a power input module and a power conversion module.

[0060] See also Fig. 9 The power input module uses the 15+7-pin standard SATA terminal block J49 to connect to the power input and output three different voltages of 3.3V, 5V, and 12V to meet the power supply requirements of different electronic devices in the interface expansion circuit.

[0061] See also Fig.10 The power conversion module is connected to the 12V output voltage of the power input module and converts the 12V voltage into 5V voltage. Since the main power supply requirement of the USB interface device is 5V voltage, the power conversion module is used to convert the 12V voltage output by the power input module into 5V voltage to ensure the power supply requirement of 5V voltage.

[0062] In the embodiment of the utility model, the power conversion module includes a power conversion chip NB679, which is used to convert 12V voltage into 5V voltage, and can provide a maximum 8A 5V current output to ensure power supply needs.

[0063] An interface expansion circuit proposed in an embodiment of the utility model also includes a power control module, which is connected to the first interface branch, the second interface branch and the third interface branch, and is used to control the power on of the first interface branch, the second interface branch and the third interface branch.

[0064] The power supply control module is used to control the power supply of the first interface branch, the second interface branch and the third interface branch, which can achieve the effect of automatic power-on, and can also control power-on manually or through other external control devices.

[0065] For details, see Fig.11 The first end DSP1_PWR of the power control module is connected to the interface expansion module, the second end USB_SW of the power control module is connected to the external control device, the third end DSP1_PWR1 of the power control module is connected to the first interface branch through a PMOS tube, the fourth end SATA_SW of the power control module is connected to the external control device and connected to the second interface branch through a PMOS tube, and the fifth end NVME_SW of the power control module is connected to the external control device and connected to the third interface branch through a PMOS tube.

[0066] The first end DSP1_PWR of the power control module serves as a port for the USB hub controller to detect the power-on status of the USB interface device. When the USB interface device is powered on normally, the first end DSP1_PWR of the power control module outputs a low level; when the USB interface device is short-circuited and overloaded, the first end DSP1_PWR of the power control module outputs a high level.

[0067] The first terminal DSP1_PWR of the power control module and the second terminal USB_SW of the power control module form an OR gate circuit to control the power on and power off of the first interface branch. When the first terminal DSP1_PWR of the power control module and the second terminal USB_SW of the power control module both output a low level, the third terminal DSP1_PWR1 of the power control module outputs a low level, and the first interface branch is powered on normally; in other cases, the third terminal DSP1_PWR1 of the power control module outputs a high level, and the first interface branch is powered off.

[0068] The fourth terminal SATA_SW of the power control module is connected to the external control device and is connected to the second interface branch through a PMOS tube. When the external control device outputs a low level through the fourth terminal SATA_SW of the power control module, the PMOS tube controls the second interface branch to power on normally; in other cases, the second interface branch is powered off.

[0069] Similarly, the fifth terminal NVME_SW of the power control module is connected to the external control device and is connected to the third interface branch through a PMOS tube. When the external control device outputs a low level through the fifth terminal NVME_SW of the power control module, the PMOS tube controls the third interface branch to power on normally; in other cases, the third interface branch is powered off.

[0070] In addition, the embodiment of the utility model also provides a terminal, which has the USB interface expansion circuit as described in any of the above embodiments. The terminal includes but is not limited to various types of terminals such as laptop computers, desktop computers or test instruments.

[0071] A USB interface expansion circuit proposed in an embodiment of the utility model expands a USB interface into multiple USB interfaces by setting an interface expansion module; by setting a first interface branch connected to the interface expansion module for connecting a USB interface device; by setting a second interface branch connected to the interface expansion module for connecting a SATA interface device; by setting a third interface branch connected to the interface expansion module for connecting an M.2 interface device, thereby expanding a USB interface into multiple different types of interfaces for easy use.

[0072] In addition, a power control module is provided to control the power-on of the first interface branch, the second interface branch and the third interface branch, so as to make the use convenient and quick.

[0073] The above is a specific description of the preferred implementation of the utility model, but the invention of the utility model is not limited to the described embodiments. Technical personnel familiar with the field can also make various equivalent deformations or substitutions without violating the spirit of the utility model. These equivalent deformations or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A USB interface expansion circuit, characterized in that: include: An interface expansion module connected to a main control device; A first interface branch, connected to the interface expansion module, for connecting a USB interface device; A second interface branch, connected to the interface expansion module, for connecting to a SATA interface device; A third interface branch, connected to the interface expansion module, for connecting to an M.2 interface device; A power control module is connected to the first interface branch, the second interface branch and the third interface branch, and is used to control the first interface branch, the second interface branch and the third interface branch to be powered on.

2. The USB interface expansion circuit according to claim 1, characterized in that: The interface expansion module includes a USB hub controller provided with at least three downstream ports; The upstream port of the USB hub controller is connected to the main control device; the first port of the downstream port of the USB hub controller is connected to the first interface branch; the second port of the downstream port of the USB hub controller is connected to the second interface branch; the third port of the downstream port of the USB hub controller is connected to the third interface branch.

3. The USB interface expansion circuit according to claim 1, characterized in that: The first interface branch includes a TYPE-A standard interface socket; The TYPE-A standard interface socket is connected to the interface expansion module, and the USB interface device is connected to the USB interface expansion circuit via the TYPE-A standard interface socket.

4. The USB interface expansion circuit according to claim 1, characterized in that: The second interface branch includes a USB-SATA bridge module and a SATA interface socket; The USB-SATA bridge module is connected to the interface expansion module, the SATA interface socket is connected to the USB-SATA bridge module, and the SATA interface device is connected to the USB interface expansion circuit via the SATA interface socket.

5. The USB interface expansion circuit according to claim 1, characterized in that: The third interface branch includes a USB-M.2 bridge module and an M.2 interface socket; The USB-M.2 bridge module is connected to the interface expansion module, the M.2 interface socket is connected to the USB-M.2 bridge module, and the M.2 interface device is connected to the USB interface expansion circuit via the M.2 interface socket.

6. The USB interface expansion circuit according to claim 1, characterized in that: It also includes a TYPE-A input interface, which is connected to the interface expansion module, and the main control device is connected to the interface expansion module through the TYPE-A input interface.

7. The USB interface expansion circuit according to claim 1, characterized in that: It also includes a power module, which includes a power input module and a power conversion module; The power input module is connected to the power input; The power conversion module is connected to the power input module and is used to convert the 12V voltage into a 5V voltage.

8. A terminal, characterized in that The terminal has the USB interface expansion circuit as claimed in claims 1 to 7.

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