CN218383841U

CN218383841U - Serial port expansion device

Info

Publication number: CN218383841U
Application number: CN202222762039.XU
Authority: CN
Inventors: 王世鹏
Original assignee: Ziguang Computer Technology Co Ltd
Current assignee: Ziguang Computer Technology Co Ltd
Priority date: 2022-10-17
Filing date: 2022-10-17
Publication date: 2023-01-24
Anticipated expiration: 2032-10-17

Abstract

The utility model discloses a serial ports extension device, include: the system comprises a mainboard, a DB9 connector and a serial port expansion card; the system comprises a mainboard, a megacore CPU, a serial port expansion card and a Peripheral Component Interface (PCI) interface, wherein the megacore CPU on the mainboard is in communication connection with an M.2 connector on the mainboard, and the serial port expansion card is inserted into the M.2 connector on the mainboard, so that the serial port expansion card converts a Peripheral Component Interface Express (PCIE) signal sent by the megacore CPU through the M.2 connector into a serial port signal; the DB9 connector is connected with the serial port expansion card to output serial port signals. The utility model provides a technical scheme has realized the extension serial ports under the condition that does not carry out the reprint to the mainboard.

Description

Serial port expansion device

Technical Field

The utility model relates to a computer hardware field, concretely relates to serial ports extension device.

Background

At present, the desktop computer of the mega-core CPU platform is widely applied to the industries of finance, electric power and the like, and most of serial ports on the desktop computer based on the mega-core CPU platform are led out from an embedded controller on a mainboard, and the number of the serial ports is one. Some users in the financial industry need more native serial ports of the chassis to support more serial peripheral devices. If the mainboard is subjected to the plate-changing design, a large amount of labor, material resources, financial resources and time cost are increased, great uncertainty is brought to material supply, and the design is not flexible.

Therefore, how to expand the number of serial ports without changing the motherboard is a considerable problem.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model discloses the embodiment provides a serial ports extension device to the extension serial ports has been realized under the condition of not carrying out the reprint to the mainboard.

The embodiment of the utility model provides a serial ports extension device, include: the system comprises a mainboard, a DB9 connector and a serial port expansion card; the megacore CPU on the mainboard is in communication connection with the M.2 connector on the mainboard, and the serial port expansion card is inserted into the M.2 connector on the mainboard, so that the serial port expansion card converts a PCIE signal sent by the megacore CPU through the M.2 connector into a serial port signal; and the DB9 connector is connected with the serial port expansion card to output the serial port signal.

Optionally, the serial port expansion card comprises a card body, a gold finger, a serial port signal conversion chip, a protocol conversion chip and a 9-pin connector; the golden finger is a golden finger with an M.2 interface specification, is positioned at one end of the card main body and is used for inserting the card main body into an M.2 connector of a computer mainboard; the serial port signal conversion chip is positioned on the card main body, is in communication connection with the golden finger and is used for converting PCIE signals into serial port signals; the protocol conversion chip is positioned on the card body, is in communication connection with the serial port signal conversion chip and is used for converting the serial port signal into a specified protocol type; the 9-pin connector is positioned at one end of the card body except the position of the golden finger, is connected with the protocol conversion chip and is used for being connected with the DB9 connector.

Optionally, the serial port signal conversion chip is Qinchun micro CH384L in model number.

Optionally, the model of the protocol conversion chip is MAX3243.

Optionally, the serial port expansion card further comprises a housing, the housing comprises an exposure slot of the 9-pin connector, and the card body is mounted in the housing so as to isolate the parts of the card body except the 9-pin connector from the outside through the housing.

Optionally, the apparatus further includes a clock chip, and the clock chip is in communication connection with the mega-core CPU and the m.2 connector on the motherboard, respectively.

Optionally, the model of the clock chip is Renesas 5P49V6965.

Optionally, the m.2 connector on the motherboard is a wifim.2 connector.

Optionally, the mega-core CPU and the wifim.2 connector are further connected through a USB signal.

Optionally, the device further comprises a patch cord and a case with a reserved serial port slot, the serial port slot on the case is used for being clamped with the DB9 connector, and the patch cord is used for switching the 9-pin connector and a corresponding pin of the DB9 connector.

The technical scheme provided by the application has the following advantages:

the technical scheme provided by the application is that the serial port expansion card with the M.2 interface specification is manufactured based on the serial port signal conversion chip, and the serial port expansion card is small in size, light in weight and convenient to install. The CPU of the megacore on the mainboard is in communication connection with the M.2 connector on the mainboard, and the serial port expansion card is inserted into the M.2 connector on the mainboard, so that the PCIE signals sent by the CPU of the megacore through the M.2 connector are converted into serial port signals by the serial port expansion card; the DB9 connector is connected with the serial port expansion card to output serial port signals. Therefore, the expansion is carried out by utilizing the existing M.2 connector in the mainboard, and if a user needs to use the M.2 connector to connect other equipment, the serial port expansion card can be pulled out, so that the flexibility is very strong, the problem of supplying goods is solved, and meanwhile, the problem that a large amount of resources and time are consumed by re-edition design of the mainboard is also solved.

In addition, the card body of the serial port expansion card is provided with an M.2 golden finger and a 9-pin connector. The PCIE signal of the mega-core CPU only needs to be connected to an M.2 connector arranged on the mainboard, when the computer mainboard is used, the M.2 serial port expansion card is inserted into the M.2 connector on the mainboard, the PCIE signal of the mega-core CPU reaches the serial port expansion card through the M.2 connector, the PCIE signal continues to reach a serial port signal conversion chip through PCB wiring of the serial port expansion card, the serial port signal conversion chip performs signal conversion, the converted signal reaches a 9-pin connector, a user only needs to connect the 9-pin connector to an external DB9 connector (for example, a DB9 connector preset on a computer case) through an external connecting line, serial port expansion can be achieved, and the position of each element on the computer mainboard does not need to be changed.

Drawings

The features and advantages of the invention will be more clearly understood by reference to the accompanying drawings, which are schematic and should not be understood as imposing any limitation on the invention, in which:

fig. 1 is a schematic structural diagram of a serial port expansion card according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a serial port expansion device according to an embodiment of the present invention;

fig. 3 is another schematic structural diagram of a serial port expansion device according to an embodiment of the present invention;

the label in the figure comprises a 1-card body, a 2-golden finger, a 3-serial port signal conversion chip, a 4-9 pin connector, a 5-mainboard, a 6-DB9 connector, a 7-clock chip, an 8-serial port expansion card and a 9-protocol conversion chip.

Detailed Description

To make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the attached drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments of the present invention, and obviously, the described embodiments are part of the embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1, in an embodiment, a serial expansion card 8 specifically includes a card body 1, a gold finger 2, a serial signal conversion chip 3, a protocol conversion chip 9, and a 9-pin connector 4. The golden finger 2 is a golden finger 2 with an M.2 interface specification, the golden finger 2 is a golden conductive contact piece which is arranged on computer hardware such as a memory bank and a memory slot and a display card slot, and the surface of the golden finger 2 is plated with gold and the conductive contact pieces are arranged like fingers, and the golden finger is positioned at one end of the card main body 1 and used for inserting the card main body 1 into an M.2 connector of a computer mainboard 5; the serial port signal conversion chip 3 is positioned on the card body 1, is in communication connection with the golden finger 2, and is used for converting PCIE signals into serial port signals; the protocol conversion chip 9 is connected with the serial port signal conversion chip 3, the types of the serial port signals are various, such as RS232, RS485, RS422 and TTL, and the protocol conversion chip 9 is used for converting the serial port signals output by the serial port signal conversion chip 3 into the serial port signals of the protocol type specified by the user for the user to use. The 9-pin connector 4 is positioned at one end of the card body 1 except the position of the gold finger 2, is connected with the protocol conversion chip 9 and is used for being externally connected with a connector of an extended serial port.

Specifically, in order to solve the less problem of serial ports quantity that provides on the domestic desktop mainboard, the embodiment of the utility model provides a serial ports expansion card 8, this expansion card is small, light, easy to assemble, based on the preparation of M.2 interface specification. Considering that the USB interface and the serial port on the motherboard 5 have higher use frequency and are not convenient to occupy, the other memory interfaces and the video card interfaces have separate use approaches. Therefore, the embodiment of the utility model provides a make the less M.2 interface card of volume, card main part 1's one end has set up the golden finger 2 of M.2 standard pattern to make card main part 1 can insert the M.2 connector in the mainboard 5. Then, the serial port signal conversion chip 3 and the protocol conversion chip 9 are soldered on the card body 1 through PCB traces, the input pin of the serial port signal conversion chip 3 is connected with the gold finger 2, and the output pin is connected with the input pin of the protocol conversion chip 9. In addition, a 9-pin connector 4 is formed at the other end of the card body 1, and is connected to an output pin of the protocol conversion chip 9 through a PCB trace. When a user needs to expand a serial port of a computer, the user only needs to insert the card body 1 into the M.2 connector of the mainboard 5 through the golden finger 2, PCIE signals of the mega-core CPU reach the M.2 connector, the PCIE signals reach the serial port signal conversion chip 3 through the inserted golden finger 2 to be converted into serial port signals, then the serial port signals are converted into an appointed protocol type through the protocol conversion chip 9, finally the converted serial port signals are output through the 9-pin connector 4, the user connects the serial port signals output by the 9-pin connector 4 to an external serial port connector through an external cable, and serial port expansion can be achieved, so that the user can use equipment connected with serial ports such as a projector.

Specifically, in the embodiment of the utility model provides an in, serial ports signal conversion chip 3 adopts homemade secret little CH384L chip, and CH384L is four serial ports and the serial ports chip of PCIE bus, contains four asynchronous serial ports and the two-way serial ports of EPP ECP enhancement mode of compatible 16C550 or 16C 750.

Support

5, 6, 7 or 8 data bits and 1 or 2 stop bit, driver supports Windows98/ME/NT4.0/2000/XP/Vista/Win7/Server2003 and the vast majority of operating systems of Linux, support types such as MODEM MODEM signal CTS, DSR, RI, DCD, DTR, RTS, can turn into RS232 level, support external CH438 chip extension 8 to 24 asynchronous serial ports in addition, realize PCIE eight serial ports, PCIE twenty eight serial ports, thereby make the serial port expansion card 8 that the embodiment of the utility model provides can adapt multiple use scene, further improved the flexibility of serial port expansion scheme.

Specifically, in the embodiment of the utility model provides an in, for the internal circuit of further protection serial ports expansion card 8, serial ports expansion card 8 still includes the casing, and card main part 1 is installed in the casing, keeps apart the internal circuit of serial ports expansion card 8 and external world through the casing, avoids being infected with of dust, water stain. The housing is provided with an exposing slot of the 9-pin connector 4, so that only the 9-pin connector 4 is exposed to facilitate the connection of the patch cable to the 9-pin connector 4.

Please refer to fig. 2 and fig. 3, which are serial port expansion devices using the serial port expansion card 8 according to an embodiment of the present invention, specifically including a motherboard 5, a DB9 connector 6 and the serial port expansion card 8 according to the embodiment.

Wherein, M.2 connector communication connection on million core CPU on the mainboard 5 and the mainboard 5 for on being connected to M.2 connector with the PCIE signal of the million core CPU on the mainboard 5, serial ports expansion card 8 inserts the M.2 connector on the mainboard 5, thereby the M.2 connector communication connection is passed through to the million core CPU on serial ports expansion card 8 and the mainboard 5, the PCIE signal of million core CPU output passes through the golden finger 2 input serial ports signal conversion chip 3 of serial ports expansion card 8. The DB9 connector 6 is connected to the 9-pin connector 4 in the serial expansion card 8, so that the DB9 connector 6 is exposed, and a user can insert a device using a serial port into the DB9 connector 6 according to actual requirements, thereby achieving the purpose of expanding the serial port, and the detailed process of signal circulation can refer to the description of the above-mentioned serial expansion card 8 related embodiments, and is not described herein again.

Specifically, the embodiment of the utility model provides a serial ports extension device still includes clock chip 7, this clock chip 7 respectively with million core CPU and mainboard 5 on M.2 connector communication connection. Specifically, in order to synchronize the operations of the controller, the register, and other elements in the mega-core CPU, the mega-core CPU is usually connected to a clock chip 7, so as to ensure the signal synchronization of the mega-core CPU. Because the embodiment of the utility model provides a 8 operation of M.2 serial ports expansion card of preparation also need clock signal to guarantee the reliability of signal conversion work, thereby be connected clock chip 7 additionally with the M.2 connector on mainboard 5, when serial ports expansion card 8 inserts the M.2 connector, clock chip 7 can provide clock signal for serial ports expansion card 8 through the M.2 connector equally, maintain serial ports expansion card 8's work synchronization, and need not additionally to add other clocks, mainboard 5's design need not to change the version, hardware resources and design time cost have been saved, the flexibility of serial ports extension scheme has further been improved.

Specifically, in an embodiment, the embodiment of the present invention provides that the mega-core CPU and the wifim.2 connector are connected through a PCIE X1 signal (PCIE signal for extending the sound card and the network card). In particular, the m.2 interface of current homemade desktop computers generally includes an m.2 solid state disk interface and a wifim.2 connector, and the wifim.2 connector is used far less frequently than the m.2 solid state disk connector. Therefore, the embodiment of the utility model provides a realize serial ports extension scheme based on WIFIM.2 connector, when the user does not need external wireless network card, can insert WIFIM.2 connector with serial ports expansion card 8, increase the native serial ports quantity that quick-witted case can support, if the user needs external wireless network card, can use the wiFi function again, have very high flexibility.

Specifically, in an embodiment, the embodiment of the utility model provides a still establish USB signal connection between mega-core CPU and WIFIM.2 connector to reserve USB type-A interface and be convenient for follow-up further extension and connect equipment such as USB flash disk.

Specifically, in an embodiment, the embodiment of the utility model provides an adopt million core CPU and mainboard platform, be applied to domestic computer platform with this scheme, when reducing hardware use cost, solve the less problem of the native serial ports quantity of domestic computer.

Specifically, in an embodiment, the embodiment of the utility model provides a serial ports extension device still includes the patch cord and reserves the quick-witted case of serial ports trench, machine case is used for holding desktop computer's all kinds of hardware components, the serial ports trench that presets on the quick-witted case is used for joint DB9 connector 6 to through the patch cord with 9 needle connector 4 and DB9 connector 6's the stitch switching that corresponds, be convenient for with the output connection of serial ports extension card 8 on quick-witted case, make the user use the extension serial ports more conveniently, improve serial ports extension scheme's flexibility.

Specifically, the above steps are described below as a practical embodiment.

On the M.2 connector of board-mounted was all received to million core CPU's PCIE signal and USB signal on the computer motherboard 5, clock chip 7 provided 100M PCIE CLK for million core CPU and M.2 connector, in the embodiment of the utility model, clock chip 7 can select Renesas 5P49V6965, can adapt the use scene under 1.5V, 2.8V and the three kinds of voltage conditions of 3.3V, high performance, low phase noise improve the clock signal quality, only use this example, do not use this as the limit. The M.2 serial port expansion card 8 is welded with a Qinming CH384L chip, a PCIE X1 signal transferred out by the mega-core CPU is received through the CH384L chip, a serial port UART signal is transferred out to the protocol conversion chip MAX3243, the UART signal is converted into an RS232 protocol form by the protocol conversion chip MAX3243, and then the signal is transmitted to the 9-pin connector 4. And manufacturing an RS232 switching cable for switching the 9-pin connector 4 to the DB9 connector 6, and then supplying the RS232 switching cable to the rear window of the case to connect the DB9 connector 6, so that the function of externally connecting a serial port peripheral is realized.

Through the steps, the technical scheme provided by the application manufactures the serial port expansion card 8 with the M.2 interface standard based on the serial port signal conversion chip, and is small in size, light in weight and convenient to install. The card body of the serial port expansion card 8 is provided with an M.2 golden finger and a 9-pin connector. The computer mainboard only needs to connect PCIE signals of the mega-core CPU to the self-contained M.2 connector on the mainboard, when the computer mainboard is used, the serial port expansion card 8 of the M.2 is inserted into the M.2 connector on the mainboard, the PCIE signals of the mega-core CPU reach the serial port expansion card 8 through the M.2 connector, the PCIE signals continue to reach the serial port signal conversion chip through the PCB wiring of the serial port expansion card 8, the serial port signal conversion chip performs signal conversion, the converted signals reach the 9-pin connector, and a user only needs to connect the 9-pin connector to an external DB9 connector (for example, a DB9 connector preset on a computer case) through an external connection line, so that serial port expansion can be realized.

The embodiment of the utility model provides a serial ports expansion card 8 and serial ports extension device need not to make the position of each component change on the computer motherboard, utilize the M.2 connector that has existed in the mainboard to expand, also can extract serial ports expansion card 8 if the user need use the M.2 connector to connect other equipment, have very strong flexibility, when having solved the supply of material problem, still solved the problem that needs re-versioning design to the mainboard consumed a large amount of resources and time.

Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations are within the scope defined by the appended claims.

Claims

1. A serial port expansion device is characterized by comprising: the system comprises a mainboard, a DB9 connector and a serial port expansion card;

the megacore CPU on the mainboard is in communication connection with the M.2 connector on the mainboard, and the serial port expansion card is inserted into the M.2 connector on the mainboard, so that the serial port expansion card converts a PCIE signal sent by the megacore CPU through the M.2 connector into a serial port signal;

and the DB9 connector is connected with the serial port expansion card to output the serial port signal.

2. The serial port expansion device according to claim 1, wherein the serial port expansion card comprises a card body, a gold finger, a serial port signal conversion chip, a protocol conversion chip and a 9-pin connector;

the golden finger is a golden finger with an M.2 interface specification, is positioned at one end of the card main body and is used for inserting the card main body into an M.2 connector of a computer mainboard;

the serial port signal conversion chip is positioned on the card main body, is in communication connection with the golden finger and is used for converting PCIE signals into serial port signals;

the protocol conversion chip is positioned on the card body, is in communication connection with the serial port signal conversion chip and is used for converting the serial port signal into a specified protocol type;

the 9-pin connector is located at one end of the card body except the position of the golden finger, is connected with the protocol conversion chip and is used for being connected with the DB9 connector.

3. The serial port expansion device according to claim 2, wherein the serial port signal conversion chip is Qinmui CH384L.

4. The serial port expansion device according to claim 3, wherein the model of the protocol conversion chip is MAX3243.

5. The serial port expansion device according to claim 2, wherein the serial port expansion card further comprises a housing, the housing comprises an exposure slot of the 9-pin connector, and the card body is mounted in the housing so as to isolate the part of the card body except the 9-pin connector from the outside through the housing.

6. The serial port expansion device according to claim 1, further comprising a clock chip, wherein the clock chip is in communication connection with the mega-core CPU and the m.2 connector on the motherboard respectively.

7. The serial port expansion device according to claim 6, wherein the model of the clock chip is Renesas 5P49V 696.

8. The serial port expansion device of claim 1, wherein the m.2 connector on the motherboard is a wifim.2 connector.

9. The serial port expansion device according to claim 8, wherein the mega-core CPU and the wifim.2 connector are further connected through USB signals.

10. The serial port expansion device according to claim 2, further comprising a patch cord and a chassis with a reserved serial port slot, wherein the serial port slot on the chassis is used for clamping the DB9 connector, and the patch cord is used for switching corresponding pins of the 9-pin connector and the DB9 connector.