A functional test circuit board and device for Type-C interface

Abstract

The present invention relates to the field of interface function testing technology, and in particular to a functional test circuit board and device for a Type-C interface, wherein the functional test circuit board comprises: a test circuit, a first interface and a second interface, wherein the first interface is a Type-C interface for connecting a product to be tested having a Type-C interface; wherein the test circuit comprises: a logic conversion module, an autonomous negotiation module and a control module, wherein the logic conversion module is connected to the Type-C interface, the autonomous negotiation module is connected to the logic conversion module, the control module is connected to the autonomous negotiation module, and according to the first control instruction and the third control instruction or the second control instruction and the third control instruction sent by the control module, the autonomous negotiation module controls the logic conversion module to switch different types of data transmission modes. The present invention improves the test efficiency and reliability of products with Type-C functions, and also reduces possible failures and maintenance costs during the test process.

Description

Technical Field

[0001] The present invention relates to the technical field of interface function testing, and in particular to a Type-C interface function testing circuit board and device. Background Art

[0002] With the rapid evolution of Type-C interface technology, this interface has been widely used in various electronic consumer products and has become a standard feature. The functional scope of the Type-C interface far exceeds the traditional charging function. It integrates advanced screen projection technology (including DisplayPort input and output functions), which greatly enriches the interconnection and display capabilities of devices. However, this technological leap has also correspondingly increased the complexity and technical requirements for Type-C interface testing.

[0003] Currently, the testing method for Type-C interface still mainly relies on manual plugging and unplugging operations. For example, the mobile phone needs to be repeatedly plugged and unplugged to verify the charging function, and the USB flash drive reading and writing test involves the plugging and unplugging of the USB flash drive. The test of the screen projection function is inseparable from the physical connection with the display. It is particularly worth noting that the reversible pluggable feature of the Type-C interface has brought great convenience to users, but it has also added challenges to the testing process, requiring testers to perform forward and reverse bidirectional plug-in tests to ensure the full compatibility of the interface.

[0004] This testing method is not only cumbersome and inefficient, but also difficult to avoid detection omissions due to the presence of human factors. Once negligence occurs in the testing process, defective products may enter the market, causing adverse effects on brand image and user experience.

[0005] Therefore, exploring and implementing more efficient and accurate Type-C interface testing solutions has become an industry consensus, aiming to improve testing efficiency and accuracy through technological innovation and to safeguard product quality. Summary of the invention

[0006] In order to solve the problem of time waste caused by multiple plugging and unplugging during the functional test of the Type-C interface and the risk of defective products missed due to surface replacement errors, the present invention provides a functional test circuit board for the Type-C interface, which performs functional tests of charging, USB flash drive data reading and writing, and video data input on a product to be tested with a Type-C interface. The circuit board includes:

[0007] A test circuit, a first interface and a second interface, wherein the first interface is a Type-C interface, used to connect a product to be tested having a Type-C interface;

[0008] Wherein, the test circuit comprises:

[0009] A logic conversion module, wherein the logic conversion module is connected to the Type-C interface;

[0010] An autonomous negotiation module, the autonomous negotiation module is connected to the logic conversion module;

[0011] A control module, the control module is connected to the autonomous negotiation module, and according to the first control instruction and the third control instruction or the second control instruction and the third control instruction sent by the control module, the autonomous negotiation module controls the logic conversion module to switch different types of data transmission modes;

[0012] The first control instruction is used to indicate that the product under test is plugged into the A side of the Type-C interface, the second control instruction is used to indicate that the product under test is plugged into the B side of the Type-C interface, and the third control instruction is used to switch different types of data transmission modes;

[0013] The second interface is connected to the logic conversion module. In different types of data transmission modes, the logic conversion module outputs a test signal through the second interface. Whether the product to be tested is qualified can be determined based on the test signal.

[0014] In one embodiment of the present invention, the control module includes an optocoupler relay, a power control pin, and a first control pin, a second control pin, and a third control pin all connected to the power control pin, the first control pin or the second control pin is connected to the input end of the optocoupler relay, and the output end of the optocoupler relay is connected to the U disk data transmission control pin and the video data control pin of the autonomous negotiation module to switch the U disk data transmission mode or the video data transmission mode;

[0015] Among them, the autonomous negotiation module controls the on and off of the first control pin or the second control pin according to identifying the CC1 pin on the A surface or the CC2 pin on the B surface. The connection of the first control pin indicates that the product to be tested is plugged into the A surface, and the connection of the second control pin indicates that the product to be tested is plugged into the B surface.

[0016] In one embodiment of the present invention, the logic conversion module is provided with a U disk data transmission channel and a video data transmission channel, and the U disk data transmission control pin and the video data control pin control the on and off of the U disk data transmission channel and the video data transmission channel;

[0017] When the logic conversion module switches to the U disk data transmission mode, the video data transmission channel is disconnected and the U disk data transmission channel is turned on; when the logic conversion module switches to the video data transmission mode, the U disk data transmission mode is turned off and the video data transmission channel is turned on.

[0018] In one embodiment of the present invention, the USB flash drive data transmission control pin is connected to a pull-down resistor.

[0019] In one embodiment of the present invention, the test circuit further includes a power module, which is connected to at least one VBUS pin of the Type-C interface and charges the product to be tested according to the maximum charging power of the product to be tested obtained by the autonomous negotiation module.

[0020] In one embodiment of the present invention, the logic conversion module and the autonomous negotiation module are both provided with interconnected flip pins. When the autonomous negotiation module detects that the product under test meets the USB3.0 transmission protocol, the autonomous negotiation module controls the logic conversion module to flip the data transmission pin of the Type-C interface opposite to its current plug-in surface, and works in conjunction with the currently existing data transmission pin to perform data transmission.

[0021] In one embodiment of the present invention, the selection of the logic conversion module is determined based on the type of the product to be tested. When the product to be tested is a display device with only a Type-C interface, the logic conversion module is a first logic conversion module. When the product to be tested is an external device with a Type-C interface and carrying a standard video source, the logic conversion module is a second logic conversion module.

[0022] In one embodiment of the present invention, when the product to be tested is a display device having only a Type-C interface, the second interface is a DP interface, one end of which is connected to the first logic conversion module, and the other end is connected to an external device carrying a standard video source, and the product to be tested to which the first logic conversion module is connected through the Type-C interface is a display device having a Type-C interface;

[0023] Among them, the first logic conversion module converts the video data provided by the external device into a level signal that can be recognized by the Type-C interface, and sends the level signal to the display device, and determines whether it is qualified according to the display device's projection result.

[0024] In one embodiment of the present invention, when the product to be tested is an external device having a Type-C interface and carrying a standard video source, the second interface is a DP interface, one end of which is connected to the second logic conversion module, and the other end is connected to an external display, and the product to be tested to which the second logic conversion module is connected through the Type-C interface is an external device having a Type-C interface and carrying a standard video source;

[0025] Among them, the second logic conversion module converts the Type-C interface level signal provided by the product to be tested into video data, projects the video data to the external display, and determines whether the product to be tested is qualified according to the projection result of the external display.

[0026] The present invention also provides a functional testing device for a Type-C interface, comprising at least one functional testing circuit board for the Type-C interface, and utilizing the functional testing circuit board to perform functional tests on charging, USB flash drive data reading and writing, and video data input and output on a product to be tested having a Type-C interface.

[0027] The above technical solution of the present invention has the following advantages compared with the prior art:

[0028] First, multi-functional testing capability: The functional test circuit board of the Type-C interface provided by the present invention supports multiple test modes, including USB flash drive data transmission and video data input or output mode. This versatility enables the same circuit board to cope with different types of test requirements, thereby improving the flexibility and utilization of the test equipment.

[0029] Second, intelligent automatic negotiation and switching: Through the cooperation of the autonomous negotiation module and the control module, the test circuit board can automatically identify whether the product to be tested is plugged into the A side or B side of the Type-C interface, and automatically switch to the corresponding USB data transmission test mode or video data input and output test mode according to the control instructions. This intelligent automation reduces manual intervention, improves test efficiency and accuracy, and also reduces possible failures and maintenance costs during the test process.

[0030] Third, bidirectional data transmission support: In certain cases (such as when the USB3.0 transmission protocol is met), the test circuit board can use the pin flipping function to make the two data transmission pins of the Type-C interface work together for more efficient USB flash drive data or video data transmission. This function enhances the data processing capability of the test circuit board and meets higher-level test requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below according to specific embodiments of the present invention in conjunction with the accompanying drawings, wherein

[0032] Figure 1 It is a structural schematic diagram of a functional test circuit board of a Type-C interface provided in an embodiment of the present invention;

[0033] Figure 2 It is the pin diagram of the Type-C interface (i.e. the first interface);

[0034] Figure 3is the circuit diagram of the control module;

[0035] Figure 4 This is the chip pin diagram of the TPS69587D chip (i.e., the autonomous negotiation module);

[0036] Figure 5 It is the chip pin diagram of TUSB1146 chip (i.e., the first logic conversion module) when testing the video data input function;

[0037] Figure 6 It is the chip pin diagram of TUSB1064 chip (i.e., the second logic conversion module) when testing the video data output function;

[0038] Description of the Figures in the Specification:

[0039] 1. Test circuit; 11. Logic conversion module; 12. Autonomous negotiation module; 13. Control module; 2. First interface; 3. Second interface. DETAILED DESCRIPTION

[0040] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0041] Embodiment 1

[0042] Reference Figures 1 to 6 As shown, the present invention provides a functional test circuit board of a Type-C interface, which performs functional tests of charging, USB flash drive data reading and writing, and video data transmission on a product to be tested having a Type-C interface. The circuit board includes the following parts:

[0043] A test circuit 1, a first interface 2 and a second interface 3, wherein the first interface 1 is a Type-C interface, used to connect a product to be tested having a Type-C interface;

[0044] Wherein, the test circuit 1 comprises:

[0045] A logic conversion module 11, wherein the logic conversion module 11 is connected to the Type-C interface;

[0046] An autonomous negotiation module 12, the autonomous negotiation module 12 being connected to the logic conversion module;

[0047] A control module 13, the control module is connected to the autonomous negotiation module 12, and according to the first control instruction Y1 and the third control instruction Y3 or the second control instruction Y2 and the third control instruction Y3 sent by the control module 13, the autonomous negotiation module 12 controls the logic conversion module to switch different types of data transmission modes, that is, the corresponding U disk data transmission or video data transmission mode under the A side or B side of the Type-C interface;

[0048] The first control instruction Y1 is used to indicate that the product under test is plugged into the A side of the Type-C interface, the second control instruction Y2 is used to indicate that the product under test is plugged into the B side of the Type-C interface, and the third control instruction Y3 is used to switch the U disk data transmission mode or the video data transmission mode;

[0049] The second interface 3 is connected to the logic conversion module. In the U disk data or video data transmission mode, the logic conversion module outputs a test signal through the second interface 3. Whether the product to be tested is qualified can be determined based on the test signal.

[0050] In this embodiment, the control module 13 includes an optocoupler relay, a power control pin P24, and a first control pin, a second control pin, and a third control pin all connected to the power control pin P24. The first control pin is used to send the first control instruction Y1, the second control pin is used to send the second control instruction Y2, and the third control pin is used to send the third control instruction Y3.

[0051] The first control pin or the second control pin is connected to the input end of the optocoupler relay, and the output end of the optocoupler relay is connected to the U disk data transmission control pin (CC1_Udisk pin, CC2_Udisk pin) and the video data control pin (CC1_PD pin, CC2_PD pin) of the autonomous negotiation module 12 to switch the U disk data transmission or video data transmission mode of the logic conversion module.

[0052] Specifically, Figure 3 As shown, the control module 13 includes a Y1 CC1 switching circuit and a Y2 CC2 switching circuit. When the Y1CC1 switching circuit corresponds to the product to be tested being plugged into the A side of the Type-C interface, it switches different types of data transmission modes. When the Y2CC2 switching circuit corresponds to the product to be tested being plugged into the B side of the Type-C interface, it switches different types of data transmission modes.

[0053] The Y1 CC1 switching circuit includes three optical coupler relays (a first optical coupler relay AQW212EH, a second optical coupler relay AQW612EH and a third optical coupler relay AQW212EH), a plurality of resistors, a plurality of LED lamps and a voltage meter. The first terminal of the first optical coupler relay AQW212EH is connected to the power control pin P24 through a resistor R63, and the second terminal thereof is connected to the power control pin P24 through a resistor R64 and an LED lamp D7; the sixth terminal and the seventh terminal of the second optical coupler relay AQW612EH are connected to the power control pin P24 through a resistor R64 and an LED lamp D7. Both are connected to the CC1 pin of the Type-C interface, the CC1 pin is connected to a voltage measuring meter, and the 8th terminal of the second optocoupler relay AQW612EH is connected to the 3rd terminal of the first optocoupler relay AQW212EH; the third optocoupler relay AQW212EH remains in the open (NO) state, its 2nd terminal receives the signal Y1, and its 4th terminal is connected to the 5th terminal of the second optocoupler relay AQW612EH through the pull-down resistor R70, and the 5th terminal is connected to the CC1_Udisk pin of the autonomous negotiation module 12.

[0054] The Y2 CC2 switching circuit includes three photocoupler relays (a fourth photocoupler relay AQW212EH, a fifth photocoupler relay AQW612EH and a sixth photocoupler relay AQW212EH), a plurality of resistors, a plurality of LED lamps and a voltage meter. The first terminal of the fourth photocoupler relay AQW212EH is connected to the power control pin P24 through a resistor R71, and the second terminal thereof is connected to the power control pin P24 through a resistor R72 and an LED lamp D10; the sixth terminal and the seventh terminal of the fifth photocoupler relay AQW612EH are connected to the power control pin P24 through a resistor R72 and an LED lamp D10. The CC2 pin of the Type-C interface is connected to the CC2 pin, the CC2 pin is connected to a voltage meter, and the 8th terminal of the fifth optical coupler relay AQW612EH is connected to the 3rd terminal of the fourth optical coupler relay AQW212EH; the sixth optical coupler relay AQW212EH remains in the open (NO) state, its 2nd terminal receives the signal Y2, and its 4th terminal is connected to the 5th terminal of the fifth optical coupler relay AQW612EH through the pull-down resistor R70, and the 5th terminal is connected to the CC2_Udisk pin of the autonomous negotiation module 12. Since the U disk is different from other products to be tested with a PD chip, the product to be tested with a PD chip can interact and communicate with the autonomous negotiation module 12 in the circuit board provided by the present invention according to its own PD chip, so as to determine whether the product to be tested is plugged into the A side or the B side of the Type-C interface.

[0055] Specifically, the autonomous negotiation module 12 is a TPS69587D chip, the product under test is connected to the CC1 pin of the Type-C interface, and interacts and communicates with the autonomous negotiation module 12 through its own PD chip, at which point the autonomous negotiation module 12 recognizes that the product under test is plugged into the A side of the Type-C interface. The product under test is connected to the CC2 pin of the Type-C interface, and interacts and communicates with the autonomous negotiation module 12 through its own PD chip, at which point the autonomous negotiation module 12 recognizes that the product under test is plugged into the B side of the Type-C interface.

[0056] The autonomous negotiation module 12 controls the on / off of the first control pin or the second control pin according to the identification result. The on-state of the first control pin indicates that the product under test is plugged into the A surface, and the on-state of the second control pin indicates that the product under test is plugged into the B surface.

[0057] The U disk does not have the function of autonomous negotiation. Therefore, in order to determine whether the U disk is plugged into the A side or the B side of the Type-C interface, the CC1_Udisk pin and the CC2_Udisk pin are connected to the pull-down resistor R70 and the pull-down resistor R78 respectively, and combined with the signal Y1 or signal Y2 received by the third optocoupler relay AQW612EH and the sixth optocoupler relay AQW212EH, the identification result of whether the U disk is plugged into the A side or the B side of the Type-C interface is obtained.

[0058] In order to more clearly understand how to switch the data transmission mode, the following is a detailed description of the Y1 CC1 switching circuit as an example. The autonomous negotiation module 12 obtains the transmission data type according to the result of the interactive communication with the product to be tested. If the data type is video data, the second optocoupler relay AQW612EH is closed, the first optocoupler relay AQW212EH is opened, and the CC1_PD pin connected to its 4th terminal responds, and the autonomous negotiation module 12 controls the logic conversion module 11 to switch to the video data transmission mode; if the data type is U disk data, the channel of the 8th terminal of the second optocoupler relay AQW612EH connected to the 3rd terminal of the first optocoupler relay AQW212EH remains closed (NC), and the CC1_Udisk pin connected to the 5th terminal of the second optocoupler relay AQW612EH responds, and the autonomous negotiation module 12 controls the logic conversion module 11 to switch to the U disk data transmission mode. If the voltage at the measured CC1 pin end is abnormal, the power control pin P24 is disconnected. The principle of switching data transmission modes of the Y2 CC2 switching circuit is the same as that of the Y1 CC1 switching circuit, and will not be described in detail here.

[0059] In addition, by measuring the voltage signal on the CC1 pin or the CC2 pin, the autonomous negotiation module 12 can obtain the power required by the product under test. According to the power requirements of the product under test, the appropriate current and voltage are provided to meet the charging requirements of the device. This mechanism ensures that the product under test can obtain the correct power supply when connected, avoiding damage or performance degradation caused by power mismatch. If the voltage signal on the measured CC1 pin or CC2 pin is abnormal, the power control pin P24 is disconnected and no subsequent tests are performed.

[0060] In addition to power management, the pull-down resistors R70 and R78 also participate in the adjustment of the data transmission rate. By detecting the voltage signals on the CC1 pin and the CC2 pin, the autonomous negotiation module 12 can determine the data transmission rate required by the device and automatically adjust the data transmission rate to achieve high-speed data transmission.

[0061] In this embodiment, the logic conversion module 11 is provided with a U disk data transmission channel and a video data transmission channel, and the U disk data transmission control pin and the video data control pin control the on and off of the U disk data transmission channel and the video data transmission channel;

[0062] When the logic conversion module 11 switches to the U disk data transmission mode, the video data transmission channel is disconnected and the U disk data transmission channel is turned on; when the logic conversion module 11 switches to the video data transmission mode, the U disk data transmission mode is turned off and the video data transmission channel is turned on.

[0063] Further, see Figure 2 , Figure 5 and Figure 6 As shown, the logic conversion module 11 connects the first group of video data transmission pins (TXN1 pin, RXN1 pin), the second group of video data transmission pins (TXP1 pin, RXP1 pin), the third group of video data transmission pins (TXN2 pin, RXN2 pin) and the fourth group of video data transmission pins (TXP2 pin, RXP2 pin) of the Type-C interface. The TXN1 pin, TXP1 pin, RXN2 pin and RXP2 pin are on the A side of the Type-C interface, and the others are on the B side of the Type-C interface.

[0064] like Figures 4 to 6As shown, the logic conversion module 11 and the autonomous negotiation module 12 (TPS69587D chip) are both provided with a flip pin FLIP, a low-speed data transmission pin CTL0 and a high-speed data transmission pin CTL1 which are connected to each other. When the TPS69587D chip detects that the product to be tested meets the USB3.0 transmission protocol, the TPS69587D chip controls the logic conversion module 11 through the high-speed data transmission pin CTL1 to flip the two groups of data transmission pins (TXN1 pin, RXN1 pin, TXP1 pin, RXP1 pin or TXN2 pin, RXN2 pin, TXP2 pin, RXP2 pin) of the Type-C interface which are opposite to its current plug-in surface, and work together with the currently existing data transmission pins. There are four groups of data transmission pins in total, and these four groups of data transmission pins are used to transmit USB flash drive data or video data.

[0065] Furthermore, if Figure 2 As shown, the test circuit 1 also includes a power module SYS_PWR, and the power module SYS_PWR is connected to at least one VBUS pin of the Type-C interface, and charges the product under test according to the maximum charging power of the product under test obtained by the autonomous negotiation module 12.

[0066] In different video data transmission modes, the model selection of the logic conversion module is different. The selection of the logic conversion module is based on the type of the product to be tested. When the product to be tested is a display device with only a Type-C interface, the logic conversion module is the first logic conversion module. When the product to be tested is an external device with a Type-C interface and a standard video source, the logic conversion module is the second logic conversion module.

[0067] When the product to be tested is a display device such as a display or projector having only a Type-C interface, the first logic conversion module is a TUSB1146 chip, and the second interface 3 is a DP interface, one end of which is connected to the HPDIN pin of the TUSB1146 chip (such as Figure 5 As shown), the other end is connected to an external device carrying a standard video source, and the product to be tested connected to the TUSB1146 chip through the Type-C interface is a display device with a Type-C interface;

[0068] Among them, the TUSB1146 chip converts the video data provided by the external device into a level signal that can be recognized by the Type-C interface, and sends the level signal to the display device. The qualification is determined according to the display device's delivery result, that is, the video data input (DP IN) function of the product to be tested is tested.

[0069] When the product to be tested is an external device such as a mobile phone or a computer having a Type-C interface and carrying a standard video source, the second logic conversion module is a TUSB1064 chip, the second interface 3 is a DP interface, one end of which is connected to the TUSB1064 chip, and the other end is connected to an external display, and the product to be tested connected to the TUSB1064 chip through the Type-C interface is an external device having a Type-C interface and carrying a standard video source;

[0070] Among them, the TUSB1064 chip converts the Type-C interface level signal provided by the product under test into video data, projects the video data to the external display, and judges whether the product under test is qualified according to the projection result of the external display, that is, tests the video data output (DP OUT) function of the product under test.

[0071] Embodiment 2

[0072] The present invention also provides a functional testing device for a Type-C interface, comprising at least one functional testing circuit board for the Type-C interface as described in any one of the first embodiments, and utilizing the functional testing circuit board to perform functional tests on a product to be tested having a Type-C interface for charging, USB flash drive data reading and writing, and video data input and / or output.

[0073] Obviously, the above embodiments are merely examples for clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the protection scope of the invention.

Claims

1. A functional test circuit board for a Type-C interface, characterized in that: include: A test circuit, a first interface and a second interface, wherein the first interface is a Type-C interface, used to connect a product to be tested having a Type-C interface; Wherein, the test circuit comprises: A logic conversion module, wherein the logic conversion module is connected to the Type-C interface; An autonomous negotiation module, the autonomous negotiation module is connected to the logic conversion module; A control module, the control module is connected to the autonomous negotiation module, and according to the first control instruction and the third control instruction or the second control instruction and the third control instruction sent by the control module, the autonomous negotiation module controls the logic conversion module to switch different types of data transmission modes; The first control instruction is used to indicate that the product under test is plugged into the A side of the Type-C interface, the second control instruction is used to indicate that the product under test is plugged into the B side of the Type-C interface, and the third control instruction is used to switch different types of data transmission modes; The second interface is connected to the logic conversion module. In different types of data transmission modes, the logic conversion module outputs a test signal through the second interface. Whether the product to be tested is qualified can be determined according to the test signal. The control module includes an optocoupler relay, a power control pin, and a first control pin, a second control pin, and a third control pin all connected to the power control pin, the first control pin or the second control pin is connected to the input end of the optocoupler relay, and the output end of the optocoupler relay is connected to the U disk data transmission control pin and the video data control pin of the autonomous negotiation module to switch the U disk data transmission mode or the video data transmission mode; Among them, the autonomous negotiation module controls the on and off of the first control pin or the second control pin according to identifying the CC1 pin on the A surface or the CC2 pin on the B surface. The connection of the first control pin indicates that the product to be tested is plugged into the A surface, and the connection of the second control pin indicates that the product to be tested is plugged into the B surface.

2. The functional test circuit board of the Type-C interface according to claim 1, characterized in that: The logic conversion module is provided with a U disk data transmission channel and a video data transmission channel, and the U disk data transmission control pin and the video data control pin control the on and off of the U disk data transmission channel and the video data transmission channel; When the logic conversion module switches to the U disk data transmission mode, the video data transmission channel is disconnected and the U disk data transmission channel is opened; When the logic conversion module switches to the video data transmission mode, the U disk data transmission mode is closed and the video data transmission channel is opened.

3. The functional test circuit board of the Type-C interface according to claim 2, characterized in that: The USB flash drive data transmission control pin is connected to a pull-down resistor.

4. The functional test circuit board of the Type-C interface according to claim 1, characterized in that: The test circuit also includes a power module, which is connected to at least one VBUS pin of the Type-C interface and charges the product to be tested according to the maximum charging power of the product to be tested obtained by the autonomous negotiation module.

5. The functional test circuit board of the Type-C interface according to claim 1, characterized in that: The logic conversion module and the autonomous negotiation module are both provided with mutually connected flip pins. When the autonomous negotiation module detects that the product to be tested meets the USB3.0 transmission protocol, the autonomous negotiation module controls the logic conversion module to flip the data transmission pin of the Type-C interface opposite to its current plug-in surface, and cooperates with the currently existing data transmission pin to perform data transmission.

6. The functional test circuit board of the Type-C interface according to claim 1, characterized in that: The selection of the logic conversion module is based on the type of the product to be tested. When the product to be tested is a display device with only a Type-C interface, the logic conversion module is a first logic conversion module. When the product to be tested is an external device with a Type-C interface and carrying a standard video source, the logic conversion module is a second logic conversion module.

7. The functional test circuit board of the Type-C interface according to claim 6, characterized in that: When the product under test is a display device having only a Type-C interface, the second interface is a DP interface, one end of which is connected to the first logic conversion module, and the other end is connected to an external device carrying a standard video source, and the product under test to which the first logic conversion module is connected through the Type-C interface is a display device having a Type-C interface; Among them, the first logic conversion module converts the video data provided by the external device into a level signal that can be recognized by the Type-C interface, and sends the level signal to the display device, and determines whether it is qualified according to the display device's projection result.

8. The functional test circuit board of the Type-C interface according to claim 6, characterized in that: When the product under test is an external device having a Type-C interface and carrying a standard video source, the second interface is a DP interface, one end of which is connected to the second logic conversion module, and the other end is connected to an external display, and the product under test connected to the second logic conversion module through the Type-C interface is an external device having a Type-C interface and carrying a standard video source; Among them, the second logic conversion module converts the Type-C interface level signal provided by the product to be tested into video data, projects the video data to the external display, and determines whether the product to be tested is qualified according to the projection result of the external display.

9. A functional test device for a Type-C interface, characterized in that: The device comprises at least one functional test circuit board of the Type-C interface as claimed in any one of claims 1 to 8, and the functional test circuit board is used to perform functional tests on charging, USB flash drive data reading and writing, and video data input and output on the product to be tested having the Type-C interface.

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