Transponder circuit based on 2Mbps and 422 serial port data

Abstract

The utility model discloses a repeater circuit based on 2Mbps and 422 serial port data. The repeater circuit comprises a data forwarding chip and circuit, a level conversion chip and circuit, a serial port transceiver chip and circuit and an interface circuit, after a USB signal accesses the data forwarding circuit, the data forwarding circuit is connected with a serial port through the serial port transceiver circuit, an RO port of the serial port transceiver chip is connected with an RXD port of the data forwarding chip, a DI port of the serial port transceiver chip is connected with a TXD port of the data forwarding chip, access data is output through the serial port connected with the serial port transceiver circuit, and the serial port is connected with the serial port transceiver circuit. Data are converted into serial port signals and then output.

Description

Technical Field

[0001] The utility model relates to a repeater circuit based on 2Mbps and 422 serial port data, belonging to the technical field of communication testing. Background Art

[0002] Serial ports are mostly used in industrial control, test equipment, and some communication equipment. Currently, the USB-to-serial method is widely used for communication between computers and serial devices. However, most existing USB-to-serial devices can only achieve one-to-one point-to-point data forwarding and cannot conveniently achieve the function of one-way to multiple-way data forwarding. In addition, the common circuits of existing USB-to-serial devices are relatively complex, require many circuit components, and have high implementation costs. FPGAs are often used to implement data forwarding functions, which is technically complex. Utility Model Content

[0003] The technical problem solved by the present invention is: in view of the problems in the current prior art such as the complexity of the data forwarding circuit, the high implementation cost and the difficulty in conveniently realizing the function of one-way to multiple-way data forwarding, a data forwarder circuit based on a data forwarding chip is proposed.

[0004] The utility model solves the above technical problems by the following technical solutions:

[0005] A repeater circuit based on 2Mbps and 422 serial port data includes a data forwarding circuit, a level conversion circuit, a serial port transceiver circuit and an interface circuit, wherein:

[0006] The output end of the level conversion circuit is respectively connected to the input end of the data forwarding circuit and the input end of the serial port transceiver circuit, and the input end of the level conversion circuit is connected to the output end of the interface circuit; the output end of the interface circuit is also connected to the input end of the data forwarding circuit, and the input end of the interface circuit is connected to the output end of the serial port transceiver circuit; the output end of the data forwarding circuit and the input end of the serial port transceiver circuit, as well as the input end of the data forwarding circuit and the output end of the serial port transceiver circuit are interconnected through corresponding ports.

[0007] The interface circuit includes a first interface circuit and a second interface circuit;

[0008] The output end of the first interface circuit is connected to the input end of the level conversion circuit and the input end of the data forwarding circuit at the same time;

[0009] The input end of the second interface circuit is connected to the output end of the serial port transceiver circuit.

[0010] The data forwarding circuit is implemented using a data forwarding chip, the chip model is CH9344, and is connected to the output end of the first interface circuit through UD+, UD- and miniUSB interfaces as input ends; and is connected to the output end of the level conversion circuit through a 3V3 voltage port as input end.

[0011] The level conversion circuit is implemented by a level conversion chip, the chip model is AMS1117-3.3, the input DC voltage 5V is connected through the VDD5 port, and the 3V3 voltage port is used as the output end to connect to the input end of the data forwarding circuit.

[0012] The serial transceiver is implemented by a serial transceiver chip, the chip model is AT3490AE, the RXD and TXD ports are connected as input ends to the output end of the data forwarding circuit, and are connected to the input end of the second interface circuit through the output serial port.

[0013] The first interface circuit is connected to the input end of the level conversion circuit via the VBUS port as a DC voltage output end using a miniUSB connector, and is connected to the input end of the data forwarding circuit via the UD+ and UD- ports as DC voltage output ends.

[0014] The second interface circuit uses a DB9 connector as an input terminal to connect to the output terminal of the serial port transceiver circuit via a serial port interface.

[0015] The data forwarding circuit output end and the serial port transceiver circuit input end are interconnected through the data forwarding circuit, and the data forwarding circuit input end and the serial port transceiver circuit output end are interconnected using TXD and RXD communication lines.

[0016] The advantages of this utility model compared with the prior art are:

[0017] The utility model provides a data forwarder circuit of a data forwarding chip, which realizes data forwarding by using a data forwarding chip. The circuit structure is streamlined, and a maximum of one-to-four-way data forwarding function can be realized at a low cost, which facilitates communication between one device and multiple devices. The data forwarder circuit components mainly use mature integrated circuit components, with a small number of component types and quantities. The parameters of mature functional devices are highly consistent, and the hardware cost can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a functional block diagram of the data forwarder provided by the utility model;

[0019] Figure 2 This is a block diagram of the data forwarding circuit provided by the utility model;

[0020] Figure 3 This is a functional block diagram of the level conversion circuit provided by the utility model;

[0021] Figure 4 This is a block diagram of the serial port transceiver circuit provided by the utility model;

[0022] Figure 5This is a functional block diagram of the interface circuit provided by the utility model. DETAILED DESCRIPTION

[0023] A transponder circuit based on 2Mbps and 422 serial port data includes a data forwarding chip and circuit, a level conversion chip and circuit, a serial port transceiver chip and circuit, and an interface circuit. After a USB signal is connected to the data forwarding circuit, the data forwarding circuit is connected to the serial port through the serial port transceiver circuit: the RO port of the serial port transceiver chip is connected to the RXD port of the data forwarding chip, and the DI port of the serial port transceiver chip is connected to the TXD port of the data forwarding chip. The input data is output through the serial port connected to the serial port transceiver circuit, thereby converting the data into a serial port signal before output.

[0024] A repeater circuit based on 2Mbps and 422 serial port data includes a data forwarding circuit, a level conversion circuit, a serial port transceiver circuit, and an interface circuit, wherein:

[0025] The output end of the level conversion circuit is respectively connected to the input end of the data forwarding circuit and the input end of the serial port transceiver circuit, and the input end of the level conversion circuit is connected to the output end of the interface circuit; the output end of the interface circuit is also connected to the input end of the data forwarding circuit, and the input end of the interface circuit is connected to the output end of the serial port transceiver circuit; the output end of the data forwarding circuit and the input end of the serial port transceiver circuit, as well as the input end of the data forwarding circuit and the output end of the serial port transceiver circuit are interconnected through corresponding ports.

[0026] The interface circuit includes a first interface circuit and a second interface circuit;

[0027] The output end of the first interface circuit is connected to the input end of the level conversion circuit and the input end of the data forwarding circuit at the same time;

[0028] The input end of the second interface circuit is connected to the output end of the serial port transceiver circuit.

[0029] The data forwarding circuit is implemented using a data forwarding chip, the chip model is CH9344, and is connected to the output end of the first interface circuit through UD+, UD- and miniUSB interfaces as input ends; and is connected to the output end of the level conversion circuit through a 3V3 voltage port as input end.

[0030] The level conversion circuit is implemented using a level conversion chip, the chip model is AMS1117-3.3, which is connected to the input DC voltage 5V through the VDD5 port and connected to the input end of the data forwarding circuit through the 3V3 voltage port as the output end.

[0031] The serial transceiver is implemented using a serial transceiver chip, the chip model is AT3490AE, the RXD and TXD ports are connected to the output end of the data forwarding circuit as input ends, and are connected to the input end of the second interface circuit through the output serial port.

[0032] The first interface circuit uses a miniUSB connector as a DC voltage output terminal connected to the input terminal of the level conversion circuit via the VBUS port, and is simultaneously connected to the input terminal of the data forwarding circuit via the UD+ and UD- ports.

[0033] The second interface circuit uses a DB9 connector as an input terminal to connect to the output terminal of the serial port transceiver circuit via a serial port interface.

[0034] The data forwarding circuit output end and the serial port transceiver circuit input end are interconnected through the data forwarding circuit, and the data forwarding circuit input end and the serial port transceiver circuit output end are interconnected through TXD and RXD communication lines.

[0035] The following is further described in conjunction with the accompanying drawings and preferred embodiments:

[0036] In the current embodiment, the working process of the circuit system is as follows:

[0037] The input voltage is connected to the data forwarding circuit and serial transceiver circuit through a level conversion circuit to provide power. The input signal is connected to the data forwarding circuit through an interface circuit, converted into a serial signal, and then output through the serial transceiver circuit and the connected serial port. The data forwarding circuit components primarily use mature integrated circuit components, with a limited number of components. The mature functional devices have high parameter consistency and can reduce hardware costs.

[0038] like Figure 1 The figure shows the system principle block diagram, which includes: data forwarding circuit, level conversion circuit, serial port transceiver circuit, and interface circuit;

[0039] The principle block diagram of the data forwarding circuit is as follows: Figure 2 As shown, the data forwarding chip model is CH9344, which receives input data signals through the UD+ and UD- pins connected to the miniUSB interface. TXD and RXD are TTL communication lines between the data forwarding chip and the serial transceiver chip. 3V3 is the DC 3.3V voltage port that the level conversion circuit uses to power the data forwarding chip.

[0040] The principle block diagram of the level conversion circuit is as follows Figure 3 As shown, the level conversion chip in the present invention is AMS1117-3.3, which inputs a DC voltage of 5V via VDD5 and the miniUSB interface, converts it into a DC voltage of 3.3V through the level conversion chip, and then outputs it to the data forwarding chip and the serial transceiver chip through 3V3 to provide power supply voltage;

[0041] The principle block diagram of the serial port transceiver circuit is as follows Figure 4As shown in the figure, the serial transceiver chip model is AT3490AE. After receiving the TTL signal sent by the data forwarding circuit through RXD and TXD, the serial transceiver chip converts it into a serial signal and then outputs it to the subsequent interface circuit through A, B, Z, and Y.

[0042] Interface circuit principle block diagram as shown Figure 5 As shown, it includes both a USB interface and a serial port. The USB interface in the interface circuit uses a miniUSB connector. VBUS is a DC 5V input port, and the miniUSB connector connects to the level conversion chip via VBUS. UD+ and UD- are USB communication lines between the miniUSB connector and the data forwarding chip. The serial port uses a DB9 connector and connects to the serial transceiver chip via the A, B, Z, and Y pins.

[0043] By adopting the utility model, a one-to-four-way data forwarding function can be realized at a low cost, which facilitates communication between one device and multiple devices, and is both convenient and cost-effective.

[0044] Although the present invention has been disclosed above in terms of preferred embodiments, this is not intended to limit the present invention. Any person skilled in the art may, without departing from the spirit and scope of the present invention, make possible changes and modifications to the technical solutions of the present invention by utilizing the methods and technical contents disclosed above. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solutions of the present invention shall fall within the scope of protection of the technical solutions of the present invention.

[0045] The contents not described in detail in the specification of the present utility model belong to the common knowledge of those skilled in the art.

Claims

1. A repeater circuit based on 2Mbps and 422 serial port data, characterized by: It includes data forwarding circuit, level conversion circuit, serial port transceiver circuit and interface circuit, among which: The output end of the level conversion circuit is respectively connected to the input end of the data forwarding circuit and the input end of the serial port transceiver circuit, and the input end of the level conversion circuit is connected to the output end of the interface circuit; the output end of the interface circuit is also connected to the input end of the data forwarding circuit, and the input end of the interface circuit is connected to the output end of the serial port transceiver circuit; the output end of the data forwarding circuit and the input end of the serial port transceiver circuit, as well as the input end of the data forwarding circuit and the output end of the serial port transceiver circuit are interconnected through corresponding ports.

2. The repeater circuit based on 2Mbps and 422 serial port data according to claim 1, characterized in that: The interface circuit includes a first interface circuit and a second interface circuit; The output end of the first interface circuit is connected to the input end of the level conversion circuit and the input end of the data forwarding circuit at the same time; The input end of the second interface circuit is connected to the output end of the serial port transceiver circuit.

3. The repeater circuit based on 2Mbps and 422 serial port data according to claim 2, characterized in that: The data forwarding circuit is implemented using a data forwarding chip, the chip model is CH9344, and is connected to the output end of the first interface circuit through UD+, UD- and miniUSB interfaces as input ends; and is connected to the output end of the level conversion circuit through a 3V3 voltage port as input end.

4. The repeater circuit based on 2Mbps and 422 serial port data according to claim 1, characterized in that: The level conversion circuit is implemented by a level conversion chip, the chip model is AMS1117-3.3, the input DC voltage 5V is connected through the VDD5 port, and the 3V3 voltage port is used as the output end to connect to the input end of the data forwarding circuit.

5. The repeater circuit based on 2Mbps and 422 serial port data according to claim 2, characterized in that: The serial transceiver is implemented by a serial transceiver chip, the chip model is AT3490AE, the RXD and TXD ports are connected as input ends to the output end of the data forwarding circuit, and are connected to the input end of the second interface circuit through the output serial port.

6. The repeater circuit based on 2Mbps and 422 serial port data according to claim 2, characterized in that: The first interface circuit is connected to the input end of the level conversion circuit via the VBUS port as a DC voltage output end using a miniUSB connector, and is connected to the input end of the data forwarding circuit via the UD+ and UD- ports as DC voltage output ends.

7. The repeater circuit based on 2Mbps and 422 serial port data according to claim 6, characterized in that: The second interface circuit uses a DB9 connector as an input terminal to connect to the output terminal of the serial port transceiver circuit via a serial port interface.

8. The repeater circuit based on 2Mbps and 422 serial port data according to claim 1, characterized in that: The data forwarding circuit output end and the serial port transceiver circuit input end are interconnected through the data forwarding circuit, and the data forwarding circuit input end and the serial port transceiver circuit output end are interconnected using TXD and RXD communication lines.

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