CN220526326U

CN220526326U - Self-checking USB changes network device

Info

Publication number: CN220526326U
Application number: CN202321885643.XU
Authority: CN
Inventors: 李�浩; 姚海望; 李志成; 刘舰; 袁斌
Original assignee: Shenzhen Weibu Information Co Ltd
Current assignee: Shenzhen Weibu Information Co Ltd
Priority date: 2023-07-18
Filing date: 2023-07-18
Publication date: 2024-02-23
Anticipated expiration: 2033-07-18

Abstract

The embodiment of the utility model discloses a self-checking USB (universal serial bus) network conversion device, which comprises a shell, wherein a USB interface, an RJ45 interface, a transformer, a USB network conversion circuit and a luminous self-checking circuit are arranged on a main board in the shell; the USB interface acquires power supply voltage from the connected terminal equipment to supply power, network signals transmitted by the RJ45 interface are transmitted to the USB network conversion circuit to perform format conversion after interference is removed through the transformer, and the USB network conversion circuit outputs corresponding USB signals and transmits the corresponding USB signals to the terminal equipment through the USB interface; the USB-to-network circuit converts USB signals transmitted by the USB interface into corresponding network signals and outputs the corresponding network signals to the RJ45 interface through the transformer; the luminous self-checking circuit detects the working state of the USB-to-network circuit and performs corresponding luminous indication. The kilomega network switching between the USB interface and the RJ45 interface can be realized, so that the terminal equipment without the RJ45 interface can realize wired network communication.

Description

Self-checking USB changes network device

Technical Field

The utility model relates to the technical field of electronics, in particular to a self-checking USB (universal serial bus) network conversion device.

Background

When a computer (PC) is used in daily life, a host cannot access the internet due to aging of a network card interface of the computer or damage of equipment. If there is a network demand, a wired network can be used to meet the network demand, and the application range is very wide.

Because of the weight requirement of some portable computers, the function of the network port is abandoned and replaced by using a wireless network card. The wireless network card has certain requirements on the use scene to meet the stability of the network, and is inconvenient to network in some specific places without covering the wireless network, but the wired network can be used and has good stability.

In addition, if network defects exist in the design and debugging stage of the mainboard, a Local Area Network (LAN) is required under certain conditions, and the Internet surfing requirement can be met through a wired network

The existing wired network is usually a network cable, an RJ45 interface is required to be arranged on a computer to insert a crystal head of the network cable, the volume of the RJ45 interface is large, a portable computer with a miniaturization requirement adopts a wireless network card without the RJ45 interface, and therefore the wired network cannot be connected when the wireless network card fails.

Disclosure of Invention

Aiming at the technical problems, the embodiment of the utility model provides a self-checking USB network conversion device, which aims to solve the problem that the conventional miniature computer cannot be connected with a wired network without an RJ45 interface.

The embodiment of the utility model provides a self-checking type USB-to-network device, which is connected with terminal equipment and a network cable, and comprises a shell, wherein a main board is arranged in the shell, and a USB interface, an RJ45 interface, a transformer, a USB-to-network circuit and a luminous self-checking circuit are arranged on the main board; the USB-to-network circuit is connected with the luminous self-checking circuit, the USB interface CN and the transformer; the transformer is connected with an RJ45 interface; the USB interface CN is connected with terminal equipment, and the RJ45 interface is inserted into a network cable;

the USB interface acquires power supply voltage from the connected terminal equipment to supply power;

the network signals transmitted by the RJ45 interface are transmitted to a USB-to-network circuit for format conversion after interference is removed through a transformer, and the USB-to-network circuit outputs corresponding USB signals and transmits the corresponding USB signals to terminal equipment through a USB interface;

the USB-to-network circuit converts USB signals transmitted by the USB interface into corresponding network signals and outputs the corresponding network signals to the RJ45 interface through a transformer;

the luminous self-checking circuit detects the working state of the USB-to-network circuit and performs corresponding luminous indication.

Optionally, in the self-checking USB network device, the RJ45 interface and the USB interface are respectively located at two ends of the housing; the male portion of the USB interface is exposed to the housing.

Optionally, in the self-checking USB network device, the stda_sstx+ pin, stda_sstx-pin, stda_ssrx+ pin, stda_ssrx-pin, d+ pin and D-pin of the USB interface are all connected to a USB network circuit; the VBUS pin of the USB interface is a power supply pin and outputs power supply voltage +5VSB; the GND_DRAIN pin, the GND pin, the G1 pin and the G2 pin of the USB interface are all grounded.

Optionally, in the self-checking USB network device, the USB network circuit includes a conversion chip, a crystal oscillator, a first capacitor, a second capacitor, and a first resistor;

the VDD33 pin, GPIO pin, vdddg_1 (NC) pin, vdddg_2 (NC) pin, and XTALDET pin of the conversion chip all input a second voltage; the MDIP0 pin, the MDIN0 pin, the MDIP1 pin, the MDIN1 pin, the MDIP2 (NC) pin, the MDIN2 (NC) pin, the MDIP3 (NC) pin and the MDIN3 (NC) pin of the conversion chip are all connected with a transformer; the VDD10 pin and the REGOUT (NC) pin of the conversion chip input a third voltage; the U3SSRXP pin, the U3SSRXN pin, the U3SSTXP pin, the U3SSTXN pin, the U2DM pin and the U2DP pin of the conversion chip are connected with the STDA_SSRX+ pin, the STDA_SSRX-pin, the STDA_SSTX+ pin, the STDA_SSTX-pin, the D-pin and the D+ pin of the USB interface one to one; the VDD5 pin of the conversion chip inputs a fourth voltage, the CKXTAL1 pin of the conversion chip is connected with the 1 st pin of the crystal oscillator and one end of the first capacitor, and the CKXTAL2 pin of the conversion chip is connected with the 3 rd pin of the crystal oscillator and one end of the second capacitor; the 2 nd foot and the 4 th foot of crystal oscillator are all grounded, and the other end of first electric capacity and the other end of second electric capacity are all grounded, and the one end and the luminous self-checking circuit of first resistance are connected to the RSET foot of conversion chip, and the other end ground connection of first resistance, the GND foot ground connection of conversion chip.

Optionally, in the self-checking USB network device, the type of the conversion chip is RTL8153-VB-CG, which is used for converting and transmitting gigabit network signals.

Optionally, in the self-checking USB network device, the USB network circuit further includes a second resistor, a third resistor, and a fourth resistor;

one end of the second resistor is connected with the GPIO pin of the conversion chip, the other end of the second resistor is input with a second voltage, one end of the third resistor is connected with the ENSWREG (CN) pin of the conversion chip, the other end of the third resistor is grounded, one end of the fourth resistor is connected with the XTALDET pin of the conversion chip, and the other end of the fourth resistor is input with the second voltage.

Optionally, in the self-checking USB network device, the USB network circuit further includes a fifth resistor and a sixth resistor;

one end of the fifth resistor is connected with the VDDG_1 (NC) pin and the VDDG_2 (NC) pin of the conversion chip, the other end of the fifth resistor is input with a second voltage, one end of the sixth resistor is connected with the REGOUT (NC) pin of the conversion chip, and the other end of the sixth resistor is input with a third voltage.

Optionally, in the self-checking USB network device, the light-emitting self-checking circuit includes a switching tube, a light-emitting diode, and a seventh resistor;

the grid electrode of the switching tube is connected with the RSET pin of the conversion chip, the drain electrode of the switching tube is connected with the anode of the light emitting diode and one end of the seventh resistor, the source electrode of the switching tube and the cathode of the light emitting diode are grounded, and the other end of the seventh resistor is input with power supply voltage.

Optionally, in the self-checking USB-to-network device, the switching tube is a PNP transistor.

Optionally, in the self-checking USB network device, the USB interface is a USB3.0 interface or a USB4.0 interface.

In the technical scheme provided by the embodiment of the utility model, the self-checking USB-to-network device comprises a shell, wherein a main board is arranged in the shell, and a USB interface, an RJ45 interface, a transformer, a USB-to-network circuit and a luminous self-checking circuit are arranged on the main board; the USB-to-network circuit is connected with the luminous self-checking circuit, the USB interface CN and the transformer; the transformer is connected with an RJ45 interface; the USB interface CN is connected with terminal equipment, and the RJ45 interface is inserted into a network cable; the USB interface acquires power supply voltage from the connected terminal equipment to supply power, network signals transmitted by the RJ45 interface are transmitted to the USB network conversion circuit to perform format conversion after interference is removed through the transformer, and the USB network conversion circuit outputs corresponding USB signals and transmits the corresponding USB signals to the terminal equipment through the USB interface; the USB-to-network circuit converts USB signals transmitted by the USB interface into corresponding network signals and outputs the corresponding network signals to the RJ45 interface through a transformer; the luminous self-checking circuit detects the working state of the USB-to-network circuit and performs corresponding luminous indication. The self-checking USB network transferring device can realize gigabit network transfer between the USB interface and the RJ45 interface, so that terminal equipment without the RJ45 interface can realize wired network communication.

Drawings

Fig. 1 is a block diagram of a self-checking USB network device according to an embodiment of the present utility model.

Fig. 2 is a schematic circuit diagram of a USB interface according to an embodiment of the present utility model.

FIG. 3 is a circuit diagram of a USB to network circuit according to an embodiment of the present utility model.

Fig. 4 is a schematic circuit diagram of a light emitting self-test circuit according to an embodiment of the utility model.

Fig. 5 is a schematic circuit diagram of a transformer according to an embodiment of the utility model.

Fig. 6 is a schematic circuit layout of a motherboard according to an embodiment of the utility model.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. Embodiments of the present utility model are intended to be within the scope of the present utility model as defined by the appended claims.

Referring to fig. 1, a self-checking type USB-to-network device connection terminal provided by an embodiment of the present utility model includes a housing, a main board is disposed in the housing, and a USB interface CN, an RJ45 interface, a transformer, a USB-to-network circuit 10, and a light emitting self-checking circuit 20 are disposed on the main board. The RJ45 interface and the USB interface can be respectively positioned at two ends of the shell; the male part of the USB interface is exposed out of the shell, or the USB interface is arranged outside the shell and is electrically connected with the main board through a data line. The USB-to-network circuit 10 is connected with a luminous self-checking circuit 20, a USB interface CN and a transformer; the transformer is connected with an RJ45 interface; the USB interface CN is connected with terminal equipment, and the RJ45 interface is inserted into a network of the gigabit network. The USB interface CN obtains a power supply voltage from the connected terminal device to supply power. The network signal transmitted by the RJ45 interface is transmitted to the USB network conversion circuit 10 for format conversion after interference is removed by the transformer, and the USB network conversion circuit 10 outputs a corresponding USB signal (carrying corresponding network data) and transmits the corresponding USB signal to the terminal equipment through the USB interface; the USB-to-network circuit 10 converts the USB signal transmitted by the USB interface into a corresponding network signal, outputs the network signal to the RJ45 interface through the transformer, and finally transmits the network signal to the network cable. The luminescence self-checking circuit 20 detects the working state of the USB to network circuit 10 and performs a corresponding luminescence indication.

The network switching between the USB interface and the RJ45 interface is realized by inserting a self-checking USB network switching device into the miniaturized terminal equipment without the RJ45 interface, and the terminal equipment without the RJ45 interface realizes wired network communication when the wireless network card fails.

It should be understood that the motherboard is further provided with a voltage conversion circuit for converting the power supply voltage +5vsb into a first voltage +3.3vsb, a second voltage 3p3v_lan4, a third voltage VDD12_lan4, and a fourth voltage VDD5; the voltage conversion circuit and the circuit of the transformer T (and its peripheral circuits) (shown in fig. 5) are conventional and will not be described in detail here.

Referring to fig. 2, the USB interface CN is preferably a USB3.0 or more (e.g. USB 4.0) interface, so that the gigabit network can be transmitted. The STDA_SSTX+ pin, the STDA_SSTX pin, the STDA_SSRX+ pin, the STDA_SSRX pin, the D+ pin and the D-pin of the USB interface CN are all connected with the USB network conversion circuit 10; the VBUS pin of the USB interface CN is a power supply pin and outputs power supply voltage +5VSB; the gnd_draw pin, GND pin, G1 pin and G2 pin of the USB interface CN are all grounded.

After the male connector of the USB interface CN is connected with the female connector of the external terminal device, the terminal device provides a power supply voltage +5vsb, and forms a loop with the grounding pin (i.e., any pin of G1, G2, 4 or 7) of the USB interface CN, so as to supply power to the self-checking USB network conversion device.

The USB signals include three sets of signals, the USB2_p2_dn signal and the USB2_p2_dp signal being USB2.0 data signal lines, following the USB2.0 protocol. The signal channels where the SSTX-3 signal and the SSTX+3 signal are located are data transmission channels, and the signal channels where the SSRX-3 signal and the SSRX+3 signal are located are data receiving channels. The three signals are transmitted with the USB to network circuit 10.

In the implementation, the power supply voltage +5VSB can be supplied after being stabilized by 60Ohm magnetic beads and then through the capacitive filtering of a plurality of 10uF for preventing crosstalk; namely, the VBUS pin is connected with one ends of a plurality of capacitors through a magnetic bead, and the other ends of the plurality of capacitors are grounded.

Referring to fig. 3, the USB-to-network circuit 10 includes a conversion chip U1, a crystal oscillator Y1, a first capacitor C1 (preferably having a capacitance of 27 pF), a second capacitor C2 (preferably having a capacitance of 27 pF), and a first resistor R1 (preferably having a resistance of 2.49kΩ); the VDD33 pin (including avdd33_1 pin, avdd33_2 pin, avdd33_3 pin, avdd33_4 pin, dvdd33_1 pin, and dvdd33_2 pin), GPIO pin, vdddg_1 (NC) pin, vdddg_2 (NC) pin, and XTALDET pin of the conversion chip U1 all input the second voltage 3p3v_lan4; the MDIP0 pin, the MDIN0 pin, the MDIP1 pin, the MDIN1 pin, the MDIP2 (NC) pin, the MDIN2 (NC) pin, the MDIP3 (NC) pin and the MDIN3 (NC) pin of the conversion chip U1 are all connected with a transformer; the VDD10 pin (including avdd10_1 (NC) pin, avdd10_2 (NC) pin, avdd10_3 pin, u3vdd10_1 pin, u3vdd10_2 pin, u2vdd10 pin and dvdd10_1 pin, dvdd10_2 pin) and REGOUT (NC) pin of the conversion chip U1 inputs the third voltage vddc12_lans 4; the U3SSRXP pin, the U3SSRXN pin, the U3SSTXP pin, the U3SSTXN pin, the U2DM pin and the U2DP pin of the conversion chip U1 are connected with the STDA_SSRX+ pin, the STDA_SSRX-pin, the STDA_SSTX+ pin, the STDA_SSTX-pin, the D-pin and the D+ pin of the USB interface CN in a one-to-one manner; the VDD5 pin of the conversion chip U1 inputs a fourth voltage, the CKXTAL1 pin of the conversion chip U1 is connected with the 1 st pin of the crystal oscillator Y1 and one end of the first capacitor C1, and the CKXTAL2 pin of the conversion chip U1 is connected with the 3 rd pin of the crystal oscillator Y1 and one end of the second capacitor C2; the 2 nd pin and the 4 th pin of the crystal oscillator Y1 are grounded, the other end of the first capacitor C1 and the other end of the second capacitor C2 are grounded, the RSET pin of the conversion chip U1 is connected with one end of the first resistor R1 and the luminous self-checking circuit 20, the other end of the first resistor R1 is grounded, and the GND pin (including U3GND_1 pin, U3GND_2 pin, U2GND pin and GND pin) of the conversion chip U1 is grounded.

The type of the conversion chip U1 is preferably RTL8153-VB-CG, which supports the conversion and transmission of gigabit network signals, and three sets of USB signals (USB 2_p2_dn signal, USB2_p2_dp signal, SSTX-3 signal, sstx+3 signal, SSRX-3 signal and ssrx+3 signal) are transmitted between the conversion chip U1 and the USB interface CN. The transfer chip U1 transmits the LASO4_MDd0+ -signal, LASO4_Md1+ -signal, LASO4_Md2+ -signal and LASO4_Md3+ -signal between the transformer. Network signals (LAN 4D 0+ signal, LAN 4D 1+ signal, LAN 4D 2+ signal and LAN 4D 3+ signal) are transmitted between the transformer and the RJ45 interface.

The 25.000MHz crystal Y1 will provide clock signals (XTAL 1_3 signal and XTAL2_3 signal) to the conversion chip U1 by vibration. The conversion chip U1 outputs a reset signal RSET_PWR corresponding to the high level and the low level according to the working state; that is, the reset signal rset_pwr becomes low level when the switching chip U1 is not operating, becomes high level when it is operating, and is also output high level when it is operating normally (the clock signal output from the crystal oscillator is received, and the respective voltages are input). The light-emitting self-checking circuit 20 performs a corresponding on/off instruction according to the reset signal rset_pwr.

Preferably, the USB to network circuit 10 further includes a second resistor R2, a third resistor R3, and a fourth resistor R4; one end of the second resistor R2 is connected to the GPIO pin of the conversion chip U1, the other end of the second resistor R2 is input with the second voltage 3p3v_lan4, one end of the third resistor R3 is connected to the ENSWREG (CN) pin of the conversion chip U1, the other end of the third resistor R3 is grounded, one end of the fourth resistor R4 is connected to the XTALDET pin of the conversion chip U1, and the other end of the fourth resistor R4 is input with the second voltage 3p3v_lan4.

R2 is a pull-up resistor, and the resistance value is preferably 10KΩ; the third resistor R3 is a pull-down resistor with a resistance value of preferably 0 omega; r4 is a pull-up resistor, and the resistance value is preferably 10KΩ. The operating parameters of the conversion chip U1 are configured by corresponding pull-ups and pull-downs.

Preferably, the USB-to-network circuit 10 further includes a fifth resistor R5 and a sixth resistor R6, where one end of the fifth resistor R5 is connected to the vddreg_1 (NC) pin and the vddreg_2 (NC) pin of the conversion chip U1, the other end of the fifth resistor R5 inputs the second voltage 3p3v_lan4, one end of the sixth resistor R6 is connected to the REGOUT (NC) pin of the conversion chip U1, and the other end of the sixth resistor R6 inputs the third voltage VDD 12_lans 4. R5 and R6 are pull-up resistors.

Preferably, pins (except pins 29, 33-36) for inputting respective voltages are respectively connected with a 0.1uf capacitor to be grounded, so as to filter the input voltages and provide stable crosstalk-free power for the conversion chip U1.

Referring to fig. 4, the light-emitting self-checking circuit 20 includes a switching tube Q1, a light-emitting diode D1, and a seventh resistor R7; the grid electrode of the switch tube Q1 is connected with the RSET pin of the conversion chip U1, the drain electrode of the switch tube Q1 is connected with the anode of the light emitting diode D1 and one end of the seventh resistor R7, the source electrode of the switch tube Q1 and the cathode of the light emitting diode D1 are grounded, and the other end of the seventh resistor R7 is input with a power supply voltage +5VSB.

Wherein, the switch tube Q1 is PNP triode, and the LED D1 emits green light. When the conversion chip U1 is not in operation, the reset signal rset_pwr is low, and Q1 is turned on to ground the positive electrode of the light emitting diode D1, so that the light emitting diode D1 does not emit light. When the conversion chip U1 works or works normally, the reset signal RSET_PWR is high level, the Q1 is cut off and is not conducted, the power voltage +5VSB is output through R7, and a loop is formed between the light emitting diode D1 and the ground to enable the light emitting diode lamp to light up, so that the conversion chip U1 can be judged to work normally.

When the conversion chip U1 is operating normally (i.e. after the light emitting diode is lit), the LANs 4_d0+ (transmit data+) signal, the LANs 4_d0- (transmit data-) signal, the LANs 4_d1+ (receive data+) signal, the LANs 4_d1- (receive data-) signal, the LANs 4_d2+ (bi-directional data+) signal, the LANs 4_d2- (bi-directional data-) signal, the LANs 4_d3+ (bi-directional data+) signal, the LANs 4_d3- (bi-directional data-) signal are connected to an RJ45 interface (in particular an RJ45-4 network interface) through a transformer. The transformer is used for ensuring the safety of a chip (integrated circuit chip) on a network card, reducing error codes caused by external electromagnetic interference (EMI), and inhibiting the energy emitted by internal electromagnetic noise to the air, so that transmitted data signals are smooth, and the mutual propagation of low-frequency ground voltage and high-frequency EMI can be blocked. Preferably, two ESD chips can be further arranged near the RJ45 interface to perform electrostatic protection on the RJ45 interface, so as to ensure the stability of network use.

Fig. 6 shows only the positions of some of the important elements on the motherboard, which are relevant to the present embodiment, and this is only an example. When the circuit layout is performed, the PCB wiring width of the power supply voltage +5VSB on the VBUS pin of the USB interface is larger than 80mil, and the circuit layout can be performed according to the requirements when the circuit layout is implemented; other existing components on the motherboard are not described in detail herein.

In summary, the self-checking type USB network-to-network device provided by the present utility model has a function of converting USB into gigabit network, and is suitable for miniaturized terminal equipment without RJ45 interface, when the wireless network card fails, the terminal equipment can insert the self-checking type USB network-to-network device through the self-checking type USB female connector, and is connected to the network cable of gigabit network, and the receiving-transmitting conversion of USB signals and network information is realized; even if the wireless network is faulty or unstable, a stable wired gigabit network can be obtained through USB conversion, and the network requirement of the miniaturized terminal equipment is met.

The above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. The self-checking USB-to-network device is connected with terminal equipment and a network cable and is characterized by comprising a shell, wherein a main board is arranged in the shell, and a USB interface, an RJ45 interface, a transformer, a USB-to-network circuit and a luminous self-checking circuit are arranged on the main board; the USB-to-network circuit is connected with the luminous self-checking circuit, the USB interface CN and the transformer; the transformer is connected with an RJ45 interface; the USB interface CN is connected with terminal equipment, and the RJ45 interface is inserted into a network cable;

2. The self-test USB network device of claim 1, wherein the RJ45 interface and the USB interface are respectively located at two ends of the housing; the male portion of the USB interface is exposed to the housing.

3. The self-test USB network device of claim 1, wherein the USB interface stda_sstx+ pin, stda_sstx-pin, stda_ssrx+ pin, stda_ssrx-pin, d+ pin, and D-pin are all connected to a USB network circuit; the VBUS pin of the USB interface is a power supply pin and outputs power supply voltage +5VSB; the GND_DRAIN pin, the GND pin, the G1 pin and the G2 pin of the USB interface are all grounded.

4. The self-test USB network device of claim 3, wherein the USB network circuit includes a conversion chip, a crystal oscillator, a first capacitor, a second capacitor, and a first resistor;

5. The self-test USB network device of claim 4, wherein the conversion chip is of a type RTL8153-VB-CG for converting and transmitting gigabit network signals.

6. The self-test USB network device of claim 4, wherein the USB network circuit further comprises a second resistor, a third resistor, and a fourth resistor;

7. The self-test USB network device of claim 4, wherein the USB network circuit further comprises a fifth resistor and a sixth resistor;

8. The self-test USB network device of claim 4, wherein the light-emitting self-test circuit includes a switching tube, a light-emitting diode, and a seventh resistor;

9. The self-test USB network device of claim 8, wherein the switching tube is a PNP transistor.

10. The self-test USB network device of claim 1, wherein the USB interface is a USB3.0 interface or a USB4.0 interface.