CN117851324A - PCIe communication module based on DP interface - Google Patents

Abstract

The invention provides a PCIe communication module based on a DP interface, wherein a first power pin of a first PCIe interface is electrically connected with a first data pin of the first DP interface through a switch circuit; the second power supply pin of the first PCIe interface is electrically connected with the second data pin of the first DP interface; the control end of the switch circuit is electrically connected with the third data pin of the first DP interface; the data communication pin of the first PCIe interface is electrically connected with the unoccupied data pin of the first DP interface; the first DP interface is connected with the second DP interface through a DP data line; the first data pin and the second data pin of the second DP interface are respectively and electrically connected with the first power pin and the second power pin of the second PCIe interface; the second data pin and the third data pin of the second DP interface are electrically connected; the unoccupied data pins of the second DP interface are electrically connected with the data communication pins of the second PCIe interface, so that the PCIe communication technical scheme based on the DP interface with the power supply protection function is realized.

Description

PCIe communication module based on DP interface

Technical Field

The invention relates to the technical field of PCIe communication modules, in particular to a PCIe communication module based on a DP interface.

Background

Currently, with the continuous development of electronic technology, data interfaces for data transmission are also continuously developed, and various data transmission interfaces are various, so that when data transmission is performed, a corresponding data transmission interface can be selected according to actual needs. In the field of data acquisition, a PCIe interface is usually integrated on a data acquisition card, data acquired by the data acquisition card is transmitted to a PCIe interface of a computer host through a high-speed data line, and the computer host realizes centralized management of the acquired data. Based on the continuous improvement of the data transmission speed requirement, at present, a technical scheme for combining and applying PCIe interfaces and DP interfaces is adopted in part of application scenes, one PCIe interface is switched to one DP interface, data transmission is carried out through a DP data line, and the other PCIe interface is switched to the other DP interface, so that the improvement of the data transmission speed between the PCIe interfaces is realized by means of the DP data line. However, in a normal application scenario, the DP data line is generally used for connection between the host and the display, when the PCIe interface and the DP interface are used in combination, after one end of the DP data line is connected to the DP interface of the PCIe interface transfer at the host, the other end of the DP data line is likely to be connected to the display by mistake, which easily results in damage to the display due to the influence of the 12V voltage in the PCIe interface.

Therefore, it is necessary to provide a PCIe communication technical solution based on a DP interface with a power supply protection function.

Disclosure of Invention

In order to solve the technical problems, the invention provides a PCIe communication module based on a DP interface, which is characterized in that a switch circuit is connected between a first PCIe interface and the first DP interface, and the switch circuit can normally communicate a first power pin of the first PCIe interface to the first DP interface only when a DP data line is connected to a second DP interface, so that the PCIe communication technical scheme based on the DP interface with a power supply protection function is realized.

The invention provides a PCIe communication module based on a DP interface, which comprises a first PCIe interface, a switch circuit, a first DP interface, a second DP interface and a second PCIe interface;

the first power supply pin of the first PCIe interface is electrically connected with the input end of the switch circuit;

the output end of the switch circuit is electrically connected with a first data pin of the first DP interface;

the second power supply pin of the first PCIe interface is electrically connected with the second data pin of the first DP interface;

the control end of the switch circuit is electrically connected with the third data pin of the first DP interface;

the data communication pin of the first PCIe interface is electrically connected with the unoccupied data pin of the first DP interface;

the first DP interface is connected with the second DP interface through a DP data line so as to enable corresponding pins between the first DP interface and the second DP interface to be communicated;

the first data pin of the second DP interface is electrically connected with the first power pin of the second PCIe interface;

the second data pin of the second DP interface is electrically connected with the second power pin of the second PCIe interface;

the second data pin and the third data pin of the second DP interface are electrically connected;

the unoccupied data pins of the second DP interface are electrically connected with the data communication pins of the second PCIe interface;

the first PCIe interface is used for connecting with a PCIe interface of a host;

the second PCIe interface is used for connecting with a PCIe version of the function board card.

Further, the working voltage of the first power supply pin of the first PCIe interface is higher than the working voltage of the second power supply pin of the first PCIe interface.

Further, the first power supply pin of the first PCIe interface is a 12V pin, and the second power supply pin of the first PCIe interface is a 3.3V pin.

Further, the ground wire of the first PCIe interface is electrically connected to the ground wire of the first DP interface.

Further, the ground wire of the second PCIe interface is electrically connected to the ground wire of the second DP interface.

Further, the first PCIe interface, the switch circuit, and the first DP interface are disposed on a first PCB.

Further, the second DP interface and the second PCIe interface are disposed on the second PCB.

Further, the switching circuit is constructed based on a triode.

Further, the switch circuit comprises a first NPN triode, a first resistor and a second resistor;

the collector of the NPN triode is electrically connected with the first power supply pin of the first PCIe interface through the first resistor, the emitter of the NPN triode is electrically connected with the first data pin of the first DP interface, and the base of the NPN triode is electrically connected with the third data pin of the first DP interface through the second resistor.

Further, the switch circuit comprises a PNP triode, a second NPN triode, a third resistor, a fourth resistor and a fifth resistor;

the emitter of the PNP triode is respectively and electrically connected with the first power supply pin of the first PCIe interface and the first end of the third resistor, the collector of the PNP triode is electrically connected with the first data pin of the first DP interface, and the base of the PNP triode is electrically connected with the second end of the third resistor and is electrically connected with the collector of the second NPN triode through the fourth resistor;

and the emitter of the second NPN triode is electrically grounded, and the base of the second NPN triode is electrically connected with the third data pin of the first DP interface through the fifth resistor.

The technical scheme provided by the invention has at least the following beneficial effects:

through connecting a switch circuit between first PCIe interface and first DP interface, only when the DP data line is connected to the second DP interface, switch circuit just can normally communicate the first power pin of first PCIe interface to first DP interface, can prevent behind the one end of DP data line is connected to first DP interface, the other end misconnection of DP data line leads to the emergence of display damage condition to the display, has effectively improved the safety in utilization, has realized power supply protect function.

Drawings

FIG. 1 is a schematic circuit diagram of a PCIe communication module based on a DP interface according to the present invention;

FIG. 2 is a schematic circuit diagram of a PCIe communication module based on a DP interface including a switch circuit according to the present invention;

FIG. 3 is a schematic diagram of a portion of a circuit including a switching circuit provided by the present invention;

fig. 4 is a schematic circuit diagram of a DP data line misconnection to a display according to the present invention.

Detailed Description

The present invention will be further described in detail with reference to the drawings and examples, which are only for the purpose of illustrating the invention and are not to be construed as limiting the scope of the invention.

Referring to fig. 1, the present invention provides a PCIe communication module based on a DP interface, including a first PCIe interface, a switch circuit, a first DP interface, a second DP interface, and a second PCIe interface;

the first power pin V11 of the first PCIe interface is electrically connected with the input end of the switch circuit;

the output end of the switch circuit is electrically connected with a first data pin D11' of the first DP interface;

the second power pin V12 of the first PCIe interface is electrically connected to the second data pin D12' of the first DP interface;

the control end of the switch circuit is electrically connected with a third data pin D13' of the first DP interface;

the data communication pins [ Dp11, …, dp1n ] of the first PCIe interface are electrically connected with the unoccupied data pins [ Dd11, …, dd1n ] of the first DP interface;

the first DP interface is connected with the second DP interface through a DP data line so as to enable corresponding pins between the first DP interface and the second DP interface to be communicated;

the first data pin D21' of the second DP interface is electrically connected with the first power pin V21 of the second PCIe interface;

the second data pin D22' of the second DP interface is electrically connected to the second power pin V22 of the second PCIe interface;

the second data pin D22 'and the third data pin D23' of the second DP interface are electrically connected;

the unoccupied data pins [ Dd21, …, dd2n ] of the second DP interface are electrically connected to the data communication pins [ DP21, …, DP2n ] of the second PCIe interface;

the first PCIe interface is used for connecting with a PCIe interface of a host;

the second PCIe interface is used for connecting with a PCIe version of the function board card.

In this embodiment, the first PCIe interface and the second PCIe interface are standard interfaces applicable to PCIe protocols. The first PCIe interface needs to be adapted to the PCIe interface of the host, and the second PCIe interface needs to be adapted to the PCIe interface of the PCIe version of the function board card. Such as: if the PCIe interface of the host is a female, the first PCIe interface is a male; if the PCIe interface of the host is a male head, the first PCIe interface is a female head; if the PCIe interface of the function board card is a female head, the second PCIe interface is a male head; if the PCIe interface of the function board card is a male head, the second PCIe interface is a female head. The first DP interface and the second DP interface are standard DP interfaces, and the first DP interface and the second DP interface can be connected through a conventional DP data line. The first data pin D11', the second data pin D12', the unoccupied data pins [ Dd11, …, dd1n ] of the first DP interface and the first data pin D21', the second data pin D22', the unoccupied data pins [ Dd21, …, dd2n ] of the second DP interface are all preferably differential signal pins in the DP interface. The switching circuit realizes a switching function, and controls the on and off states between the input end and the output end through the voltage of the control end. Such as: if the control end of the switching circuit receives a high-level signal (such as 3.3V voltage), the input end and the output end of the switching circuit are conducted; if the control terminal of the switching circuit receives a low level signal (e.g., 0V voltage), the switching circuit is turned off between its input terminal and its output terminal. In a specific implementation, the first PCIe interface is connected to a PCIe interface of the host. The host computer may be understood as a computer. The PCIe interface of the host computer is a standard PCIe interface which is conventionally used for plugging display cards, sound cards, network cards, acquisition cards and the like. The PCIe interface of the host is used for receiving data provided by the function board card, and the host centrally processes the data. The functional board card here may be a board card for data acquisition, such as a current acquisition board card, a voltage acquisition board card, or the like. The function board card is a function board card integrating PCIe versions of a standard PCIe interface. In fig. 1, n is a positive integer, which is used to represent the number of data lines required by the PCIe communication module to implement data transmission. The second data pin D22 'and the third data pin D23' of the second DP interface may be electrically connected by directly printing a circuit on the PCB, or may be electrically connected by soldering a wire. The data communication pins [ Dp11, …, dp1n ] of the first PCIe interface are pins for data transmission, such as pins correspondingly connected to the differential line number lines, and may specifically be selected according to the data transmission requirement. The first power supply pin V11 and the second power supply pin V12 of the first PCIe interface are pins for providing voltage, such as: the first power supply pin V11 is a 12V voltage pin, and the second power supply pin V12 is a 3.3V voltage pin. In a specific implementation process, when the DP data line normally connects the first DP interface and the second DP interface, the second power pin V12 of the first PCIe interface, the second data pin D12 'of the first DP interface, the second data pin D22' of the second DP interface, and the second power pin V22 of the second PCIe interface are communicated, and the second power pin V12 of the first PCIe interface, the second data pin D12 'of the first DP interface, the second data pin D22' of the second DP interface, the third data pin D23 'of the second DP interface, and the third data pin D13' of the first DP interface are communicated with each other; when the second power supply pin V12 of the first PCIe interface provides a high-level signal, the input end and the output end of the switch circuit are turned on, at this time, the first power supply pin V11 of the first PCIe interface, the first data pin D11 'of the first DP interface, the first data pin D21' of the second DP interface, and the first power supply pin V21 of the second PCIe interface are communicated, and a voltage provided by the first power supply pin V11 of the first PCIe interface may be provided to the first power supply pin V21 of the second PCIe interface. As shown in fig. 4, when one end of the DP data line is connected to the first DP interface and the other end is connected to the DP interface of the display, since the second data pin D2' and the third data pin D3' in the DP interface of the display are not electrically connected, the control end of the switching circuit cannot acquire the high-level signal, and the voltage provided by the first power pin V11 of the first PCIe interface cannot be provided to the first data pin D1' of the DP interface of the display, so that the display can be protected from damage caused by the erroneous connection of the DP data line to the DP interface of the display.

Further, the working voltage of the first power supply pin V11 of the first PCIe interface is higher than the working voltage of the second power supply pin V12 thereof.

Further, the first power supply pin V11 of the first PCIe interface is a 12V pin, and the second power supply pin V12 of the first PCIe interface is a 3.3V pin.

In this embodiment, when the first PCIe interface is normally connected to the PCIe interface of the host, the PCIe interface of the main body normally provides power, the first power supply pin V11 of the first PCIe interface may output 12V voltage, and the second power supply pin V12 of the first PCIe interface may output 3.3V voltage. When the DP data line is normally connected to the first DP interface and the second DP interface, the 3.3V voltage output from the second power supply pin V12 of the first PCIe interface may be transmitted to the control end of the switch circuit, and the switch circuit is driven by the 3.3V high-level voltage signal at the control end of the switch circuit, and the input end and the output end of the switch circuit are turned on, at this time, the 12V voltage provided by the first power supply pin V11 of the first PCIe interface may be provided to the first power supply pin V21 of the second PCIe interface.

Further, the ground wire of the first PCIe interface is electrically connected to the ground wire of the first DP interface.

Further, the ground wire of the second PCIe interface is electrically connected to the ground wire of the second DP interface.

In this embodiment, the ground wire in the first PCIe interface is electrically connected to the ground wire of the first DP interface, and the ground wire of the second PCIe interface is electrically connected to the ground wire of the second DP interface. It should be noted that in this embodiment, the first PCIe interface and the second PCIe interface are both used for transmitting data provided by the functional board card, and are not used for video transmission, so the first PCIe interface does not have to connect all pins with the first DP interface, the second PCIe interface does not have to connect all pins with the second DP interface, and the connection between the first PCIe interface and the first DP interface and the connection between the second PCIe interface and the second DP interface only need to meet the minimum data transmission requirement according to a conventional design. In a specific embodiment, assuming that the first PCIe interface is an X1 PCIe interface, the first power pin V11 of the first PCIe interface is a 12V pin, and the second power pin V12 is a 3.3V pin, the first power pin V11 of the first PCIe interface may be connected to one pin of the lanes 0 in the first DP interface, the second power pin V12 of the first PCIe interface may be connected to another pin of the lanes 0 in the first DP interface, the transmit data differential pin of the first PCIe interface may be connected to a pin of the lanes 1 in the first DP interface, and the receive data differential pin of the first PCIe interface may be connected to a pin of the lanes 2 in the first DP interface. For other pins of the first PCIe interface, corresponding pin connections or nulls in the first DP interface may be selected according to actual needs. The transmitting data differential pin and the receiving data differential pin of the first PCIe interface both belong to data communication pins [ Dp11, …, dp1n ] of the first PCIe interface, and the pin of the channel 1 and the pin of the channel 2 in the first Dp interface both belong to unoccupied data pins [ Dd11, …, dd1n ] of the first Dp interface. When the second PCIe interface and the second DP interface are connected, the connection relationship refers to the connection relationship between the first PCIe interface and the first DP interface. It should be noted that, when the present application is specifically implemented, it may be implemented according to a technical scheme conventional in the art or implemented after being adaptively adjusted based on logical simple reasoning, where the embodiments are not specifically described.

Further, the first PCIe interface, the switch circuit, and the first DP interface are disposed on a first PCB.

Further, the second DP interface and the second PCIe interface are disposed on the second PCB.

In this embodiment, with first PCIe interface, switch circuit, first DP interface integration in first PCB board, set up second DP interface and second PCIe interface in the second PCB board, can effectively improve the convenience of operation, simultaneously, also help preventing that each subassembly from appearing the condition of misconnection in the connection process.

Further, the switching circuit is constructed based on a triode.

In this embodiment, the switching circuit is implemented based on the on-off characteristics between the collector and the emitter of the transistor, and may be implemented by a single transistor or a combination of a plurality of transistors.

Further, referring to fig. 2 and 4, the switching circuit includes a first NPN triode QN1, a first resistor R1, and a second resistor R2;

the collector of the first NPN triode QN1 is electrically connected to the first power supply pin V11 of the first PCIe interface through the first resistor R1, the emitter of the first NPN triode is electrically connected to the first data pin D11 'of the first DP interface, and the base of the first NPN triode is electrically connected to the third data pin D13' of the first DP interface through the second resistor R2.

In this embodiment, the first NPN transistor QN1 is a conventional NPN transistor. The first resistor R1 and the second resistor R2 are resistors of conventional types, and specific resistance values can be selected according to actual needs. In a specific embodiment, the first power pin V11 of the first PCIe interface provides a 12V voltage and the second power pin V12 provides a 3.3V voltage. As shown in fig. 2, when the DP data line connects the first DP interface and the second DP interface, a path is formed between the second power supply pin V12 of the first PCIe interface, the second data pin D12 'of the first DP interface, the second data pin D22' of the second DP interface, the third data pin D23 'of the second DP interface, and the third data pin D13' of the first DP interface, the second power supply pin V12 of the first PCIe interface may provide a 3.3V high level signal for the base of the first NPN transistor QN1, and the collector and the emitter of the first NPN transistor QN1 are turned on, so that the first power supply pin V11 of the first PCIe interface, the first data pin D11 'of the first DP interface, the first data pin D21' of the second DP interface, and the first power supply pin V11 of the first PCIe interface may provide a 12V voltage for the first power supply pin V21 of the second PCIe interface. As shown in fig. 4, when the first DP interface is connected to the DP interface of the display by mistake through the DP data line, the collector and the emitter of the first NPN triode QN1 are in an off state, and the first data pin D1' of the DP interface of the display cannot obtain the 12V voltage, which will not damage the display.

Further, referring to fig. 3, the switching circuit includes a PNP transistor QP, a second NPN transistor QN2, a third resistor R3, a fourth resistor R4, and a fifth resistor R5;

the emitter of the PNP triode QP is electrically connected to the first power supply pin V11 of the first PCIe interface and the first end of the third resistor R3, the collector of the PNP triode QP is electrically connected to the first data pin D11' of the first DP interface, and the base of the PNP triode QP is electrically connected to the second end of the third resistor R3 and is electrically connected to the collector of the second NPN triode QN2 through the fourth resistor R4;

the emitter of the second NPN triode QN2 is electrically connected to ground, and the base thereof is electrically connected to the third data pin D13' of the first DP interface through the fifth resistor R5.

In this embodiment, the PNP transistor QP is a conventional PNP transistor, and the second NPN transistor QN2 is a conventional NPN transistor. The third resistor R3, the fourth resistor R4 and the fifth resistor R5 are resistors of conventional types, and specific resistance values can be selected according to actual needs. In a specific implementation, the first power pin V11 of the first PCIe interface provides a voltage of 12V, the second power pin V12 provides a voltage of 3.3V, the third resistor R3 and the fifth resistor R5 may take resistances of 10K, and the fourth resistor R4 may take resistances of 1K. When the base electrode of the second NPN triode QN2 receives the 3.3V high level signal, the collector electrode and the emitter electrode thereof are turned on, the voltage of the connection point between the third resistor R3 and the fourth resistor R4 is pulled down, that is, the base electrode voltage of the PNP triode QP is pulled down, the collector electrode and the emitter electrode of the PNP triode QP are turned on, and the first power supply pin V11 of the first PCIe interface can provide 12V voltage for the first power supply pin V21 of the second PCIe interface.

The above embodiments should not limit the present invention in any way, and all technical solutions obtained by equivalent substitution or equivalent conversion fall within the protection scope of the present invention.

Claims (10)

1. The PCIe communication module based on the DP interface is characterized by comprising a first PCIe interface, a switch circuit, a first DP interface, a second DP interface and a second PCIe interface;

the first power supply pin of the first PCIe interface is electrically connected with the input end of the switch circuit;

the output end of the switch circuit is electrically connected with a first data pin of the first DP interface;

the second power supply pin of the first PCIe interface is electrically connected with the second data pin of the first DP interface;

the control end of the switch circuit is electrically connected with the third data pin of the first DP interface;

the data communication pin of the first PCIe interface is electrically connected with the unoccupied data pin of the first DP interface;

the first DP interface is connected with the second DP interface through a DP data line so as to enable corresponding pins between the first DP interface and the second DP interface to be communicated;

the first data pin of the second DP interface is electrically connected with the first power pin of the second PCIe interface;

the second data pin of the second DP interface is electrically connected with the second power pin of the second PCIe interface;

the second data pin and the third data pin of the second DP interface are electrically connected;

the unoccupied data pins of the second DP interface are electrically connected with the data communication pins of the second PCIe interface;

the first PCIe interface is used for connecting with a PCIe interface of a host;

the second PCIe interface is used for connecting with a PCIe version of the function board card.

2. The PCIe communication module of claim 1 wherein the first power pin of the first PCIe interface operates at a higher voltage than the second power pin thereof.

3. The PCIe communication module as defined in claim 2 wherein the first power pin of the first PCIe interface is a 12V pin and the second power pin is a 3.3V pin.

4. The PCIe communication module as defined in claim 1 wherein the ground line of the first PCIe interface is electrically connected to the ground line of the first DP interface.

5. The PCIe communication module as defined in claim 1 wherein a ground line of the second PCIe interface is electrically connected to a ground line of the second DP interface.

6. The PCIe communication module as defined in claim 1 wherein the first PCIe interface, the switch circuit, and the first DP interface are disposed on a first PCB.

7. The PCIe communication module as defined in claim 1 wherein the second DP interface and the second PCIe interface are disposed on a second PCB board.

8. The PCIe communication module as defined in claim 1 wherein the switching circuit is constructed based on a triode.

9. The PCIe communication module as defined in claim 8 wherein the switch circuit comprises a first NPN transistor, a first resistor, a second resistor;

the collector of the first NPN triode is electrically connected with the first power supply pin of the first PCIe interface through the first resistor, the emitter of the first NPN triode is electrically connected with the first data pin of the first DP interface, and the base of the first NPN triode is electrically connected with the third data pin of the first DP interface through the second resistor.

10. The PCIe communication module as defined in claim 8 wherein the switch circuit comprises a PNP transistor, a second NPN transistor, a third resistor, a fourth resistor, a fifth resistor;

the emitter of the PNP triode is respectively and electrically connected with the first power supply pin of the first PCIe interface and the first end of the third resistor, the collector of the PNP triode is electrically connected with the first data pin of the first DP interface, and the base of the PNP triode is electrically connected with the second end of the third resistor and is electrically connected with the collector of the second NPN triode through the fourth resistor;

and the emitter of the second NPN triode is electrically grounded, and the base of the second NPN triode is electrically connected with the third data pin of the first DP interface through the fifth resistor.