Test apparatus, system and method for USB-C

Abstract

A USB-C type testing device, system, and method provide forward and reverse plugging tests without physical plugging and unplugging. The USB-C type testing device includes a first connection terminal, a signal input terminal, and a processing unit. The first connection terminal is connected to a downstream device via a first cable; the signal input terminal receives a selection signal; the processing unit has a first forward channel mode and a first reverse channel mode. The processing unit determines whether the device is connected to a first forward pin group or a first reverse pin group based on the set channel pins of the first cable, and regards the connected pin group as a first physical channel. The processing unit selects either the first forward channel mode or the first reverse channel mode according to the selection signal, and matches the selected channel mode to the first physical channel to form a first analog channel.

Description

Technical Field

[0001] Regarding a testing apparatus, system, and method for electronic devices, and particularly a USB-C type testing apparatus, system, and method. Background Technology

[0002] The Universal Serial Bus (USB) has evolved from various different connector specifications in its early days to a single USB Type-C connector. USB-C connectors have both forward and reverse insertion orientations, so users will not insert them incorrectly.

[0003] Because USB-C connectors support both forward and reverse connections, equipment manufacturers need to ensure that each connection method functions correctly during testing. In other words, every USB-C test requires both forward and reverse insertion. For a USB-C connector, this means the manufacturer needs to plug and unplug it four times for a complete test. However, repeated plugging and unplugging can cause problems such as poor contact, signal interference, or connector wear on the test fixture. Summary of the Invention

[0004] In view of this, in one embodiment, the USB-C type test device includes a first connection terminal, a signal input terminal, and a processing unit. The first connection terminal is connected to the downstream device via a first cable, and the first connection terminal has a first positive pin group and a first negative pin group; the signal input terminal receives a selection signal; the processing unit is connected to the first connection terminal and the signal input terminal, and the processing unit has a first positive channel mode and a first negative channel mode. The processing unit determines whether to connect to the first positive pin group or the first negative pin group based on the set channel pins of the first cable, and designates the connected pin group as a first physical channel. The processing unit selects either the first positive channel mode or the first negative channel mode according to the selection signal, and matches the selected channel mode to the first physical channel to form a first analog channel. The processing unit transmits test requirements to the downstream device through the first analog channel. The USB-C type test device provides multiple different pin selection modes for users to select whether to plug into the downstream device in a positive or negative direction via the signal input terminal, and then test the selected plugging method.

[0005] In one embodiment, a USB-C type testing system includes a downlink device and a testing device. The downlink device receives test requirements and provides a first forward connection or a first reverse connection. The testing device has a first connection terminal, a signal input terminal, and a processing unit. The processing unit is connected to the first connection terminal and the signal input terminal. The processing unit has a first forward channel mode and a first reverse channel mode. The first connection terminal is connected to the downlink device via a first cable and selects either the first forward connection or the first reverse connection. The processing unit establishes a first physical channel according to the selected connection. The signal input terminal receives a selection signal. The processing unit selects either the first forward channel mode or the first reverse channel mode according to the selection signal. The processing unit matches the selected channel mode to the first physical channel to form a first analog channel. The processing unit transmits the test requirements to the downlink device through the first analog channel.

[0006] In one embodiment, a USB-C testing method includes connecting a test device to a downstream device; the test device detecting whether the downstream device is in a first forward connection or a first reverse connection; the test device establishing a first physical channel based on the detection result; the test device adjusting the first physical channel to a first analog channel based on a selection signal; and the test device sending test requirements to the downstream device through the first analog channel.

[0007] The aforementioned USB-C type test equipment, system, and method provide a test environment that eliminates the need to plug and unplug USB devices. Testers can select either a forward or reverse plugging mode via the corresponding interface on the signal input terminal. The test equipment adjusts the corresponding pins of the downstream device according to the selected plugging mode, thereby achieving forward / reverse adjustment without actual plugging and reducing wear and tear on both the test equipment and the downstream device during repeated plugging. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of a USB-C type test system according to one embodiment.

[0009] Figure 2 This is a schematic diagram of a USB-C type test device according to an embodiment.

[0010] Figure 3 This is a schematic diagram of the pin distribution of the first connection terminal in one embodiment.

[0011] Figure 4 This is a schematic diagram of the pin layout of a USB-C cable connector according to an embodiment.

[0012] Figure 5 This is a schematic diagram of the testing process for a USB-C type device according to one embodiment.

[0013] Figure 6This is a schematic diagram of the interface for each channel mode in one embodiment.

[0014] Figure 7 This is a schematic diagram of the interface for each channel mode in one embodiment.

[0015] Figure 8 This is a schematic diagram of a USB-C type test device according to an embodiment.

[0016] The reference numerals in the attached figures are explained as follows:

[0017] 10: Testing System

[0018] 100: Testing equipment

[0019] 110: First connection end

[0020] 111: First positive pin group

[0021] 112: First reverse pin group

[0022] 120: Second connection end

[0023] 130: Signal input terminal

[0024] 140: Power supply end

[0025] 150: Processing Unit

[0026] 151: First positive channel mode

[0027] 152: First Reverse Channel Mode

[0028] 153: Second positive channel mode

[0029] 154: Second Reverse Channel Mode

[0030] 200: Downlink equipment

[0031] 210: First Cable

[0032] 211: USB-C connector

[0033] 212: Positive connection pin group

[0034] 213: Reverse connection pin group

[0035] 220: Downlink connection end

[0036] 300: Uplink equipment

[0037] 310: Second cable

[0038] 320: Uplink connection end

[0039] 410: Selection signal

[0040] 420: Test Requirements

[0041] 430: Test Results

[0042] 441: First Physical Channel

[0043] 442: First Analog Channel

[0044] 451: Second Physical Channel

[0045] 452: Second Analog Channel

[0046] S510, S520, S530, S540, S550: Steps Detailed Implementation

[0047] Please refer to Figure 1 , Figure 2 The diagram shows a schematic of a USB-C type test system and a schematic of a USB-C type test device according to an embodiment. The USB-C type test system 10 (hereinafter referred to as test system 10) includes at least a test device 100 and a downstream device 200. The test device 100 has a first connection terminal 110, a second connection terminal 120, a signal input terminal 130, a power terminal 140, and a processing unit 150. The processing unit 150 is connected to the first connection terminal 110, the second connection terminal 120, the power terminal 140, and the signal input terminal 130.

[0048] Signal input terminal 130 is used to receive selection signal 410. In some embodiments, signal input terminal 130 can be connected to a computer. Signal input terminal 130 receives selection signal 410 and transmits selection signal 410 to processing unit 150. In some embodiments, signal input terminal 130 can be a pin switch. The arrangement of the pin switches generates corresponding selection signals 410, which are then transmitted to processing unit 150. Power terminal 140 is used to receive operating power for the operation of test equipment 100. In some embodiments, signal input terminal 130 can also be a customized software interface. Users can select at least one pin through the software interface to generate the corresponding selection signal 410.

[0049] Both the first connection port 110 and the second connection port 120 are Universal Serial Bus Type-C (USB-C) connection ports, and each can be connected to a different USB-C cable. The first connection port 110 corresponds to the downstream connection port 220 of the downstream device 200. The second connection port 120 corresponds to the upstream connection port 320 of the upstream device 300. The downstream device 200 is the USB electronic device to be tested, such as an external flash drive, keyboard, mouse, headphones, microphone, video recording box, external graphics card box, personal computer, or laptop computer.

[0050] Both ends of the USB-C cable have USB-C connectors 211. To further distinguish the USB-C cables connected to different connectors, the USB-C cable connected to the first connector 110 is referred to as the first cable 210. Correspondingly, the USB-C cable connected to the second connector 120 is referred to as the second cable 310. The other end of the first cable 210 is connected to the downlink connector 220 of the downlink device 200. The other end of the second cable 310 is connected to the uplink connector 320 of the uplink device 300. The number of pins on the first cable 210 matches the number of pins on the first port. Similarly, the second cable 310 has the same number of pins as the second port. In other words, both the first cable 210 and the second cable 310 have a full pin count.

[0051] Please refer to Figure 3 and Figure 4 The figures shown are a pin distribution diagram of the first connection terminal 110 in one embodiment and a pin distribution diagram of the USB-C cable connector in another embodiment. Figure 3 This is the pin arrangement viewed from the outside towards the inside of the USB-C connector. Figure 4 This is the pin arrangement viewed from the outside into the USB-C connector 211. The first connection terminal 110 has a first positive pin group 111 and a first negative pin group 112.

[0052] The first positive pin group 111 is... Figure 3 The pin combination on the left, the first inverting pin group 112 is Figure 3The pin group on the right. The first positive pin group 111 and the first negative pin group 112 are arranged side by side and back to back. The first positive pin group 111 includes GND (A1), TX1+ (A2), TX1- (A3), VBus (A4), CC1 (A5), D+ (A6), D- (A7), SBU1 (A8), VBus (A9), RX2- (A10), RX2+ (A11), and GND (A12), where A1 to A12 are the coordinates of the physical positions of each pin in the first positive pin group 111. The first reverse pin group 112 includes GND (B1), TX2- (B2), TX2- (B3), VBus (B4), CC2 (B5), D+ (B6), D- (B7), SBU2 (B8), VBus (B9), RX1- (B10), RX1+ (B11), and GND (B12), where B1 to B12 are the coordinates of the physical positions of each pin of the first reverse pin group 112.

[0053] The USB-C connector 211 of the first cable 210 and the second cable 310 has a positive connection pin group 212 and a negative connection pin group 213. Figure 4 The left side is the positive connection pin group 212, and the right side is the reverse connection pin group 213. The positive connection pin group 212 and the reverse connection pin group are arranged side by side and facing each other. The positive connection pin group 212 includes GND (A12), RX2+ (A11), RX2- (A10), VBus (A9), SBU1 (A8), D- (A7), D+ (A6), CC1 (A5), VBus (A4), TX1- (A3), TX1+ (A2), and GND (A1). The reverse connection pin group 213 includes GND (B1), TX2+ (B2), TX2- (B3), VBus (B4), CC2 (B5), D+ (B6), D- (B7), SBU2 (B8), VBus (B9), RX1- (B10), RX1+ (B11), and GND (B12).

[0054] Generally, the connection relationship between the downlink device 200 and the first cable 210 can be divided into a first forward connection relationship (unlabeled) or a first reverse connection relationship (unlabeled). The first forward connection relationship involves the first forward pin group 111 connecting to the forward pin group 212. The first reverse connection relationship involves the first forward pin group 111 connecting to the reverse pin group 213. For ease of explanation, the first cable 210 will be considered as an object of either the first forward connection relationship or the first reverse connection relationship between the first port and the first connection terminal 110.

[0055] The processing unit 150 has a first forward channel mode 151 and a first reverse channel mode 152. The first connection terminal 110 is adapted to either the first forward channel mode 151 or the first reverse channel mode 152. The processing unit 150 can switch the signals of the connected channels using a multiplexer, a control chip, or a programmable gate array, etc. In other words, the first forward channel mode 151 and the first reverse channel mode 152 correspond to the forward or reverse connection of the first connection terminal 110. The processing unit 150 selects the first forward channel mode 151 or the first reverse channel mode 152 according to the selection signal 410 and matches the selected channel mode to the first connection terminal 110. For a clearer explanation of the overall operation of the test system 10, please refer to [reference needed]. Figure 5 This is a schematic diagram of the testing process for a USB-C device according to one embodiment. The testing method for a USB-C device includes the following steps:

[0056] Step S510: Connect the test device to the downlink device;

[0057] Step S520: The test equipment detects whether the downlink device is in the first forward connection relationship or the first reverse connection relationship;

[0058] Step S530: The test equipment establishes a first physical channel based on the detected connection relationship;

[0059] Step S540: The test equipment adjusts the first physical channel to the first analog channel according to the selection signal; and

[0060] Step S550: The test equipment sends test requirements to the downstream equipment through the first analog channel.

[0061] First, the first cable 210 is connected to the downlink device 200 and the test device 100 respectively (corresponding to step S510). The processing unit 150 detects whether the connection of the downlink device 200 is a first forward connection or a first reverse connection through the first connection terminal 110 (corresponding to step S520). The processing unit 150 detects whether the connection is to the first forward pin group 111 or the first reverse pin group 112 based on the configuration channel pin (CC) (unlabeled) of the first cable 210. The processing unit 150 establishes the first physical channel 441 based on the detection result (corresponding to step S530). Figure 2 In this configuration, the first connection terminal 110 and the downlink connection terminal 220 are connected by a first cable 210 (represented by a connecting line segment), and this connection corresponds to the first physical channel 441 (represented by a light gray block). For example, if the processing unit 150 detects that the connection method of the downlink device 200 is a first positive plug-in relationship, then the connection channel between the first positive pin group 111 and the positive pin group 212 is called the first physical channel 441.

[0062] Processing unit 150 selects either a first forward channel mode 151 or a first reverse channel mode 152 based on selection signal 410. Processing unit 150 matches the selected channel mode with the first physical channel 441 to form a first analog channel 442 (corresponding to step S540). As previously mentioned, the first physical channel 441 represents the connection between the first cable 210 and the physical pins of the downlink device 200. Processing unit 150 can change the pin identification of the downlink device 200 by selecting either the first forward channel mode 151 or the first reverse channel mode 152, thereby adjusting the forward or reverse connection of the downlink device 200.

[0063] In other words, the processing unit 150 changes the identification of the forward or reverse connection of the first cable 210 by selecting a channel mode, rather than reconnecting the first cable 210. For ease of explanation, the aforementioned selected channel mode is matched to the first physical channel 441 of the entity to form the first analog channel 442. Figure 2 In the process, the dark gray area is used as the first analog channel 442 of the processing unit 150 to the downlink device 200. Then, the processing unit 150 sends the test request 420 to the downlink device 200 through the first analog channel 442 (corresponding to step S550).

[0064] The following example uses 6 sets of changeover switches, but in reality, each pin of the first connection terminal 110 can be defined, so it is not limited to this number. Please refer to [reference needed]. Figure 6 , Figure 7 These are schematic diagrams of the interface modes for each channel in one embodiment. Figure 6 The interface screen for signal input terminal 130 is shown. Signal input terminal 130 is configured with 6 sets of switches: 20_SEL1, 20_SEL2, 3X_SEL1, 3X_SEL2, and CC_SEL. The selection result of these 6 sets of switches matches the selection signal 410. Switches starting with "20_" represent pins for the USB 2.0 communication protocol. Switches starting with "3X_" represent pins for the USB 3.X communication protocol. The USB 3.X communication protocol includes different versions such as 3.0, 3.1, and 3.2. Figure 6 Each toggle switch option has an "ON" and "OFF" setting, indicated by grayed-out blocks. The following shows the switching between USB 2.0 and USB 3.X communication protocols for the first port:

[0065]

[0066]

[0067] Table 1. Pin Identification Switching Table for First Forward Channel and First Reverse Channel

[0068] The processing unit 150 matches either the first positive channel mode 151 or the first negative channel mode 152 according to the first positive pin group 111, or matches either the first positive channel mode 151 or the first negative channel mode 152 according to the first negative pin group 112. Generally, the first port of USB-C is compatible with the transmission of USB 2.0 and USB 3.X communication protocols. Therefore, the selection signals 410 for USB 2.0 and USB 3.X communication protocols are described in sequence, but are not limited to this order. Testers can select the pin to be tested from the signal input terminal 130 according to different test requirements and generate the corresponding selection signal 410.

[0069] If both "20_SEL1" and "3X_SEL1" of selection signal 410 are "ON", processing unit 150 will consider it as selecting the first positive channel mode 151, such as... Figure 6 As shown. In the first forward channel mode 151, the processing unit 150 sets the pin identification at position A6 of the first port to "D+" and the pin identification at position A7 to "D-" to correspond to the forward connection of the USB 2.0 communication protocol.

[0070] For the USB 3.X communication protocol, in the first forward channel mode 151, the processing unit 150 sets the pin identification of position A2 of the first port to "TX1+", the pin identification of A3 to "TX1-", the pin identification of B10 to "RX1-", and the pin identification of B11 to "RX1+", in order to correspond to the forward plugging of the USB 3.X communication protocol.

[0071] In addition, when "CC_SEL" is set to "ON", the pin identification at position A5 is set to "CC1". If "CC_SEL" is set to "OFF", the pin identification at position B5 is set to "CC2".

[0072] If both "20_SEL1" and "3X_SEL1" of selection signal 410 are "OFF", processing unit 150 considers it as selecting the first reverse channel mode 152. Figure 7As shown. In the first reverse channel mode 152, the pin identification at position B6 of the first port is set to "D+", and the pin identification at position B7 is set to "D-", to correspond to the reverse connection of the USB 2.0 communication protocol. For the USB 3.X communication protocol, in the first reverse channel mode 152, the processing unit 150 sets the pin identification at position B2 of the first port to "TX2+", the pin identification at position B3 to "TX2-", the pin identification at position A10 to "RX2-", and the pin identification at position A11 to "RX2+", to correspond to the reverse connection of the USB 3.X communication protocol. Therefore, the user does not need to manually plug and unplug the first cable 210 at the first port. The test device 100 can match the forward and reverse connection of the first port to the downstream device 200 according to the selection signal 410.

[0073] Processing unit 150 obtains a first analog channel 442 by matching the first physical channel 441 with the selected channel mode (first forward channel mode 151 or first reverse channel mode 152). Processing unit 150 sends a test request 420 to downlink device 200 through the first analog channel 442. Processing unit 150 can also obtain the test results 430 returned by downlink device 200 through the first analog channel 442.

[0074] In some embodiments, the second connection terminal 120 has a second positive pin group and a second negative pin group. Both the second connection terminal 120 and the first connection terminal 110 are USB-C connection terminals. Therefore, the pin arrangement of the second positive pin group and the second negative pin group can be referenced. Figure 3 The processing unit 150 further includes a second forward channel mode 153 and a second reverse channel mode 154. The second connection terminal 120 is adapted to either the second forward channel mode 153 or the second reverse channel mode 154. The second connection terminal 120 connects to the second cable 310 and is connected to the uplink device 300.

[0075] Processing unit 150 detects a connection to either the second positive pin group or the second negative pin group based on the CC pin of the second cable 310. Processing unit 150 refers to the pin group connected to the aforementioned second cable 310 (corresponding to the second positive pin group or the second negative pin group) as the second physical channel 451. Figure 2 In the middle, the second connection terminal 120 and the upstream connection terminal 320 are connected by a second cable 310 (represented by a connection line segment), and this connection corresponds to the second physical channel 451 (represented by a light gray block).

[0076] Processing unit 150 selects either the second forward channel mode 153 or the second reverse channel mode 154 according to selection signal 410. Then, processing unit 150 forms a second analog channel 452 by combining the second physical channel 451 with the selected channel mode (corresponding to the second forward channel mode 153 or the second reverse channel mode 154). Figure 2 In the middle, the dark gray area is used as the processing unit 150 to the second analog channel 452 of the uplink device 300.

[0077] Please refer to Table 2. If both "20_SEL2" and "3X_SEL2" of selection signal 410 are "ON", processing unit 150 will consider it as selecting the second positive channel mode 153. Figure 6 In the second forward channel mode 153, the processing unit 150 sets the pin identification at position A6 of the second port to "D+" and the pin identification at position A7 to "D-", to correspond to the forward connection of the USB 2.0 communication protocol. In the second forward channel mode 153, the processing unit 150 sets the pin identification at position A2 of the second port to "TX1+", the pin identification at position A3 to "TX1-", the pin identification at position B10 to "RX1-", and the pin identification at position B11 to "RX1+", to correspond to the forward connection of the USB 3.X communication protocol.

[0078]

[0079] Table 2. Pin Identification Switching Table for Second Forward Channel and Second Reverse Channel

[0080] If both "20_SEL2" and "3X_SEL2" of selection signal 410 are "OFF", processing unit 150 will consider the second reverse channel mode 154 to be selected. Please refer to [the relevant documentation]. Figure 7 In the second reverse channel mode 154, the processing unit 150 sets the pin identification of position B2 of the second port to "TX2+", the pin identification of B3 to "TX2-", the pin identification of A10 to "RX2-", and the pin identification of A11 to "RX2+", in order to correspond to the reverse plugging of the USB 3.X communication protocol.

[0081] In some embodiments, the uplink device 300 is connected to the signal input terminal 130. Please refer to [reference needed]. Figure 8Processing unit 150 connects the first analog channel 442 and the second analog channel 452. Uplink device 300 can be, but is not limited to, a personal computer, laptop, tablet, or mobile phone. Uplink device 300 sends test request 420 to test device, causing test request 420 to be transmitted to downlink device 200 via the second analog channel 452 and the first analog channel 442. Downlink device 200 generates test result 430 according to test request 420 and sends test result 430 to test device. Test device forwards test result 430 to uplink device 300. Furthermore, downlink device 200 can also be a device with a USB-C connection, such as a personal computer, laptop, or tablet. Uplink device 300 can also be connected to a power source, providing power to the test device.

[0082] The USB-C type test equipment, system, and method provide a test environment that does not require plugging and unplugging the USB device. Testers can select either a forward or reverse plugging mode via the corresponding interface of the signal input terminal 130. The test equipment adjusts the pins of the downstream device 200 at the corresponding position according to the selected plugging mode, thereby achieving forward / reverse adjustment without actual plugging and reducing wear and tear on the test equipment and downstream device 200 during repeated plugging.

Claims

1. A USB-C type testing device, characterized in that, include: A first connection terminal is connected to a downstream device via a first cable, the first connection terminal having a first positive pin group and a first negative pin group; One signal input terminal receives a selection signal; and A processing unit is connected to the first connection terminal and the signal input terminal. The processing unit has a first positive channel mode and a first reverse channel mode. The processing unit determines whether to connect to the first positive pin group or the first reverse pin group based on a set channel pin of the first cable, and regards the connected pin group as a first physical channel. The processing unit selects either the first positive channel mode or the first reverse channel mode according to the selection signal. The processing unit matches the selected channel mode to the first physical channel to form a first analog channel. The processing unit transmits a test requirement to the downlink device through the first analog channel.

2. The USB-C type testing device as described in claim 1, characterized in that, The device includes a second connection terminal, to which the processing unit is connected. The second connection terminal is connected to an uplink device via a second cable. The second connection terminal has a second positive pin group and a second negative pin group. The processing unit has a second positive channel mode and a second negative channel mode. The processing unit determines whether to connect to the second positive pin group or the second negative pin group based on the set channel pins of the second cable, and regards the connected pin group as a second physical channel. The processing unit selects either the second positive channel mode or the second negative channel mode according to the selection signal. The processing unit matches the selected signal channel to the second physical channel to form a second analog channel. The processing unit connects the first analog channel and the second analog channel.

3. The USB-C type testing device as described in claim 2, characterized in that, The uplink device is also connected to the signal input terminal. The uplink device sends the test requirement to the downlink device through the second analog channel and the first analog channel. The downlink device generates a test result according to the test requirement and sends the test result to the uplink device through the first analog channel and the second analog channel.

4. The USB-C type testing device as described in claim 1, characterized in that, The signal input terminal is connected to a computer, which sends the selection signal to the processing unit.

5. The USB-C type testing device as described in claim 1, characterized in that, Furthermore, the signal input terminal is a toggle switch.

6. A USB-C type testing system, characterized in that, include: A downstream device receives a test request, and the downstream device provides a first forward connection or a first reverse connection. as well as A test device has a first connection terminal, a signal input terminal, and a processing unit. The processing unit is connected to the first connection terminal and the signal input terminal. The processing unit has a first forward channel mode and a first reverse channel mode. The first connection terminal is connected to the downlink device via a first cable and selects either the first forward connection or the first reverse connection. The processing unit establishes a first physical channel according to the selected connection. The signal input terminal receives a selection signal. The processing unit selects either the first forward channel mode or the first reverse channel mode according to the selection signal. The processing unit matches the selected channel mode to the first physical channel to form a first analog channel. The processing unit transmits the test requirements to the downlink device through the first analog channel.

7. The USB-C type test system as described in claim 6, characterized in that, The first positive connection relationship is formed when a designated channel pin of the downlink device is connected to a first positive pin group of the first connection terminal, and the first negative connection relationship is formed when the designated channel pin is connected to a first negative pin group of the first connection terminal.

8. The USB-C type test system as described in claim 6, characterized in that, It also includes an uplink device that provides a second forward connection or a second reverse connection.

9. The USB-C type test system as described in claim 8, characterized in that, The test equipment further includes a second connection terminal, to which the processing unit is connected. The second connection terminal is connected to the uplink device via a second cable and selects either the second forward connection or the second reverse connection. The processing unit establishes a second physical channel based on the selected connection. The processing unit selects either a second forward channel mode or a second reverse channel mode based on the selection signal. The processing unit matches the selected signal channel to the second physical channel to form a second analog channel. The processing unit connects the first analog channel and the second analog channel.

10. The USB-C type test system as described in claim 9, characterized in that, The uplink device is also connected to the signal input terminal. The uplink device sends the test requirement to the downlink device through the second analog channel and the first analog channel. The downlink device generates a test result according to the test requirement and sends the test result to the uplink device through the first analog channel and the second analog channel.

11. A testing method for USB-C type, characterized in that, include: Connect a test device to a downstream device; The test equipment detects whether the downlink device is in a first forward connection or a first reverse connection; The testing equipment establishes a first physical channel based on the detection results; The test equipment adjusts the first physical channel to a first analog channel according to a selection signal; as well as The test equipment sends a test request to the downlink device through the first analog channel.

12. The USB-C type testing method as described in claim 11, characterized in that, The steps for establishing the first physical channel by detecting whether the downlink device is in the first forward connection or the first reverse connection using the test equipment include: Connect the test device to an uplink device; The test equipment detects whether the uplink device is in a second forward connection or a second reverse connection in order to establish a second physical channel; The test equipment selects either a second positive channel mode or a second negative channel mode based on the selection signal; and The test equipment matches the selected signal channel to the second physical channel to form a second analog channel.

13. The USB-C type testing method as described in claim 12, characterized in that, After the step of matching the selected signal channel to the second physical channel and forming the second analog channel in the test equipment, the following is included: The uplink device sends the test request to the downlink device through the second analog channel and the first analog channel; The downstream device generates a test result according to the test requirements; and The downlink device sends the test result to the uplink device through the first analog channel and the second analog channel.

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