CN217061010U

CN217061010U - Electronic tag circuit and chip for USB cable and USB cable

Info

Publication number: CN217061010U
Application number: CN202220959625.0U
Authority: CN
Inventors: 赖奕佳; 胡用; 杨乐
Original assignee: Shanghai Xinzhou Technology Co ltd; Chipsea Technologies Shenzhen Co Ltd
Current assignee: Shanghai Xinzhou Technology Co ltd; Chipsea Technologies Shenzhen Co Ltd
Priority date: 2022-04-22
Filing date: 2022-04-22
Publication date: 2022-07-26
Anticipated expiration: 2032-04-22

Abstract

The present disclosure provides an electronic tag circuit for a USB cable, a chip and a USB cable. Wherein, an electronic label circuit for USB cable includes: the detection circuit is used for detecting the voltage value of one end of a power line of the USB cable; and a communication circuit connected to the detection circuit and having a terminal for connecting a configuration channel line of the USB cable to transmit the voltage value via the terminal. A USB cable, comprising: a cable including a power line and a configuration channel line; a first circuit comprising: the first detection circuit is used for detecting a first voltage value at a first end of the power line; a first communication circuit connected to the first detection circuit and the configuration channel line to transmit the first voltage value through the configuration channel line; a second circuit comprising: the second detection circuit is used for detecting a second voltage value of the second end of the power line; and the second communication circuit is connected with the second detection circuit and the configuration channel line so as to send the second voltage value through the configuration channel line. With the present disclosure, the voltage of its power line may be provided by a USB cable.

Description

Electronic tag circuit for USB cable, chip and USB cable

Technical Field

The present disclosure relates to the field of electronic circuit technologies, and in particular, to an electronic tag (E-Marker) circuit, a chip, and a USB cable for a Universal Serial Bus (USB) cable.

Background

More and more terminal devices are required to support fast charging, which is usually achieved by means of increasing the current. The current increase also has higher and higher requirements on the impedance of the wire, and if the wire has larger impedance, the wire is burnt out after passing large current. Therefore, the terminal equipment supporting large-current quick charging detects the impedance of the wire, and different charging power strategies are carried out according to the impedance of the wire. How to quickly and accurately realize the wire impedance measurement becomes a problem to be solved by the quick-charging technology.

In the related art, the wire impedance detection method includes: (1) when the wire leaves a factory, the corresponding factory measurement impedance is written into an E-Marker chip of the wire, and the terminal equipment obtains the impedance of the wire through a corresponding communication protocol. This wire rod impedance value only represents the impedance when dispatching from the factory, and the wire rod can age in the use, will lead to the impedance of wire rod to obviously increase, and the heavy current can bring the risk of burning out. (2) In the charging process, the terminal device obtains the voltage value U1 of the adapter end through a special instruction by pulling a fixed current I, and detects the voltage value U2 of the interface end of the terminal device in real time. The impedance of the wire was obtained by R ═ (U1-U2)/I. The adapter needs to support the corresponding adapter terminal voltage acquisition command, and has no universality.

SUMMERY OF THE UTILITY MODEL

In view of the above, the embodiments of the present disclosure provide an electronic tag circuit for a USB cable, a chip and a USB cable, so as to at least partially solve the technical problem that monitoring the voltage value of a power line by a terminal device and an adapter in a wire impedance measurement requires adding a functional module in the terminal device and the adapter.

According to an aspect of the present disclosure, there is provided an electronic tag circuit for a USB cable, including: the detection circuit is used for detecting the voltage value of one end of a power line of the USB cable; and a communication circuit connected to the detection circuit and having a terminal for connecting a configuration channel line of the USB cable to transmit the voltage value via the terminal.

In some embodiments, a detection circuit comprises: and the analog-to-digital conversion module is used for sampling the voltage signal at one end of the power line and converting the voltage signal into a digital signal to obtain a voltage value.

In some embodiments, the communication circuit, upon detecting the identity discovery command signal via the terminal, sends a response signal via the terminal to send the voltage value.

According to another aspect of the present disclosure, an electronic tag chip for a USB cable is provided, which includes an electronic tag circuit of an embodiment of the present disclosure.

According to another aspect of the present disclosure, there is provided a USB cable including: a cable including a power line and a configuration channel line; a first circuit comprising: the first detection circuit is used for detecting a first voltage value of the first end of the power line; a first communication circuit connected to the first detection circuit and a first end of the configuration channel line to transmit a first voltage value through the configuration channel line; a second circuit comprising: the second detection circuit is used for detecting a second voltage value of the second end of the power line; and the second communication circuit is connected with the second detection circuit and the second end of the configuration channel line so as to send the second voltage value through the configuration channel line.

In some embodiments, a first detection circuit comprises: the first analog-to-digital conversion module is used for sampling the voltage signal at the first end of the power line and converting the voltage signal into a digital signal to obtain a first voltage value.

In some embodiments, the second detection circuit comprises: and the second analog-to-digital conversion module is used for sampling the voltage signal at the second end of the power line and converting the voltage signal into a digital signal to obtain a second voltage value.

In some embodiments, a first communication circuit to send a first response signal via a configuration channel line to send a first voltage value upon detecting a first identity discovery command signal via the configuration channel line; and the second communication circuit sends a second response signal to send a second voltage value through the configuration channel line when detecting the second identity discovery command signal through the configuration channel line.

In some embodiments, the first circuit is integrated with the first electronic tag chip.

In some embodiments, the second circuit is integrated with the second electronic tag chip.

According to one or more technical schemes provided in the embodiment of the disclosure, the voltage of the power line can be provided by the USB cable, and as the terminal device supports communication with the electronic tag circuit of the USB cable, the functional modules of the terminal device and the adapter are not added, so that real-time monitoring of the impedance of the power line is realized. The application range of the USB cable can be widened, and the cost of the terminal equipment or the adapter can be reduced.

Drawings

Further details, features and advantages of the disclosure are disclosed in the following description of exemplary embodiments, taken in conjunction with the accompanying drawings, in which:

fig. 1 shows a schematic structural diagram of an electronic tag circuit for a USB cable according to an exemplary embodiment of the present disclosure;

FIG. 2 shows another schematic structural diagram of an electronic tag circuit for a USB cable according to an exemplary embodiment of the present disclosure;

FIG. 3 shows a schematic structural diagram of a USB cable according to an exemplary embodiment of the present disclosure;

fig. 4 shows a schematic structural diagram of a USB type C cable according to an example embodiment of the present disclosure;

fig. 5 shows a flow chart of a cable impedance detection method of an exemplary embodiment of the present disclosure.

Detailed Description

Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While certain embodiments of the present disclosure are shown in the drawings, it is to be understood that the present disclosure may be embodied in various forms and should not be construed as limited to the embodiments set forth herein, but rather are provided for a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and the embodiments of the disclosure are for illustration purposes only and are not intended to limit the scope of the disclosure.

It should be understood that the various steps recited in the method embodiments of the present disclosure may be performed in a different order, and/or performed in parallel. Moreover, method embodiments may include additional steps and/or omit performing the illustrated steps. The scope of the present disclosure is not limited in this respect.

The term "include" and variations thereof as used herein are open-ended, i.e., "including but not limited to". The term "according to" is "at least partially according to". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". Relevant definitions for other terms will be given in the following description. It should be noted that the terms "first", "second", and the like in the present disclosure are only used for distinguishing different devices, modules or units, and are not used for limiting the order or interdependence relationship of the functions performed by the devices, modules or units.

It is noted that references to "a" or "an" in this disclosure are intended to be illustrative rather than limiting, and that those skilled in the art will appreciate that references to "one or more" are intended to be exemplary and not limiting unless the context clearly indicates otherwise.

In the embodiment of the present disclosure, the USB cable may include a USB cable having both ends of a Type C connector, and may also include a USB cable having one end of a Type C (Type-C) connector and the other end of a Type a (Type-a) connector, which is not limited in the embodiment of the present disclosure.

In the embodiment of the present disclosure, the USB cable may include a USB cable that supports data transmission, and may also include a USB cable that does not support data transmission. The data transmission of the USB cable may include: USB2.0, USB3.1 Gen1, USB3.1 Gen2, thunder and lightning 3, thunder and lightning 4, etc., which are not limited in the embodiments of the present disclosure.

In the embodiment of the present disclosure, the USB cable may include a USB cable that supports video signal transmission, and may also include a cable that does not support video signal transmission.

In embodiments of the present disclosure, a USB cable may be used for power transmission. One end of the USB cable is connected to a SINK terminal (also called SINK), and the other end is connected to a Source terminal (also called Source). Without limitation, the USB cable may transmit electrical energy between the source and sink based on a Power Delivery (PD) protocol. As an example, the source terminal includes an adapter or the like, and the suction terminal includes a terminal device such as a mobile phone or a notebook computer. As an example, the terminal device may be used as a source to supply power to other terminal devices, for example, a notebook computer may supply power to a mobile phone.

The E-mark is called an electronic Marked Cable, that is, a USB active Cable encapsulated with an E-Marker chip, an uplink Port (UFP) and a downlink Port (DFP) can read the attributes of the Cable by using a PD protocol: power transmission capability, data transmission capability, ID, etc.

Fig. 1 shows a schematic structural diagram of an electronic tag circuit for a USB cable according to an exemplary embodiment of the present disclosure, and as shown in fig. 1, the electronic tag circuit 100 includes: a detection circuit 110 for detecting a voltage value at one end of a power supply line (VBUS) of the USB cable; the communication circuit 120 is connected to the detection circuit 110, and has a terminal 121 for connecting a configuration channel line of the USB cable, so as to transmit the voltage value output by the detection circuit 110 via the terminal 121. The voltage of the power line of the USB cable can be provided by the USB cable, and the terminal equipment supports the communication with the electronic tag circuit of the USB cable, so that the functional modules of the terminal equipment and the adapter can not be added, and the impedance of the power line can be monitored in real time. The application range of the USB cable can be widened, and the cost of the terminal equipment or the adapter can be reduced.

As an embodiment, the detection circuit 110 includes an analog-to-digital conversion module, which samples a voltage signal at one end of a power line of the USB cable and converts the sampled analog signal into a digital signal to obtain the voltage value. As an example, the analog-to-digital conversion module can be selected from, but not limited to, a successive approximation type, a sigma-delta type, and the like, which have high precision.

As an embodiment, the communication circuit 120 includes a processor connected to a computer readable memory storing instructions executable by the processor to send the voltage value output by the detection circuit 110 via the terminal 121. It should be understood that the communication circuit 120 may also adopt other digital circuits, and the present embodiment is not limited thereto.

As an embodiment, the communication circuit 120, upon detecting an Identity discovery Command (Discover Identity Command) signal via the terminal 121, transmits a response signal via the terminal 121 to transmit the voltage value. The identity discovery command signal can be defined in the USB type C standard, and this embodiment will not be described in detail.

As an embodiment, as shown in fig. 2, the electronic tag circuit 100 may further include: and a memory 130 for storing the attribute of the USB cable. The communication circuit 120 is connected to the memory 130 to read the attribute from the memory 130 and transmit the attribute via the terminal 121. As an example, the attributes of a USB cable may include current carrying capability, data carrying capability, vendor information, and the like. As one example, the memory may be a non-volatile, multi-time programmable memory.

As an embodiment, the communication circuit 120, when detecting the identity discovery command signal via the terminal 121, sends a response signal via the terminal 121 to send the voltage value and the attribute. In this embodiment, the voltage value and the attribute may be transmitted together by one signal, or may be transmitted by a plurality of signals, respectively, which is not limited in this embodiment.

As an embodiment, as shown in fig. 2, the electronic tag circuit 100 may further include: the power interface 140, the power interface 140 is connected to a power source, and is used for supplying power to the electronic tag circuit 100. As an example, the power interface 140 is used to connect to a configuration channel line of the USB cable, which is VCONN, and when the configuration channel line is connected to the power supply, the power interface 140 transmits power to the power interface 140, and the power interface 140 uses the power to supply power to the electronic tag circuit 100. Generally, the configuration channel line includes CC1 and CC2, CC1 may be used for information transfer, and CC2 may be used for power transfer.

The embodiment of the present disclosure further provides an electronic tag chip for a USB cable, including the electronic tag circuit 100 of the embodiment of the present disclosure.

In some embodiments, two electronic tag chips may be respectively disposed at two ends of the USB cable, and the two electronic tag chips or circuits respectively provide a voltage value of the power line at the end where the electronic tag chips or circuits are located. As an embodiment, two electronic tag chips or circuits respectively provide the voltage value of the power line at one end of the terminal device (SINK) to the terminal device, so that the terminal device can determine the impedance of the power line based on the voltage values at two ends of the power line.

Fig. 3 shows a schematic structural diagram of a USB cable according to an exemplary embodiment of the present disclosure, and as shown in fig. 3, the USB cable 300 includes: a cable 310, a first circuit 320, and a second circuit 330. The first circuit 320 is disposed at a first end of the cable 310, and the second circuit 330 is disposed at a second end of the cable 310.

Referring to fig. 3, cable 310 includes a power line VBUS and a configuration channel line CC. It should be understood that cable 310 may also include other wires, not shown in fig. 3.

Referring to fig. 3, the first circuit 320 includes: a first detection circuit 321 for detecting a first voltage value U1 at a first end of the power supply line VBUS of the cable 310; the first communication circuit 322 is connected to the first detection circuit 321 and the configuration channel line CC, and transmits the first voltage value U1 output from the first detection circuit 321 through the configuration channel line CC.

As an embodiment, the first detection circuit 321 includes a first analog-to-digital conversion module, and the first analog-to-digital conversion module is configured to sample a voltage signal at a first end of the power line VBUS of the USB cable, and convert the sampled analog signal into a digital signal to obtain a first voltage value at the first end. As an example, the first analog-to-digital conversion module can be selected from, but not limited to, a successive approximation type, a sigma-delta type, and other high-precision analog-to-digital conversion modules.

As an embodiment, the first communication circuit 322 includes a processor connected to a computer readable memory storing instructions executable by the processor to send the first voltage value U1 output by the first detection circuit 321 via the configuration channel line CC. It should be understood that the first communication circuit 322 may also adopt other digital circuits, and the embodiment is not limited thereto.

As an embodiment, the first circuit 320 may further include: and the first memory is used for storing the attribute of the USB cable. The first communication circuit 322 is connected to the first memory to read the attribute from the first memory and to send the attribute via the configuration channel line CC. As an example, the attributes of a USB cable may include current carrying capability, data carrying capability, vendor information, and the like. As an example, the memory may be a non-volatile, multi-time programmable memory.

Referring to fig. 3, the second circuit 330 includes: a second detection circuit 331 for detecting a second voltage value U2 at a second end of the power line VBUS of the cable 310; the second communication circuit 332 is connected to the second detection circuit 331 and the placement channel line CC, and is connected to the placement channel line CC to transmit the second voltage value U2 output from the second detection circuit 331 via the placement channel line CC.

As an embodiment, the second detection circuit 331 includes a second analog-to-digital conversion module, and the second analog-to-digital conversion module is configured to sample a voltage signal at the second end of the power line VBUS of the USB cable, and convert the sampled analog signal into a digital signal to obtain a second voltage value at the second end. As an example, the second analog-to-digital conversion module can be selected from, but not limited to, a successive approximation type, a sigma-delta type, and other high-precision analog-to-digital conversion modules.

As an embodiment, the second communication circuit 332 comprises a processor connected to a computer readable memory storing instructions executable by the processor to send the second voltage value U2 output by the second detection circuit 331 via the configuration channel line CC. It should be understood that the second communication circuit 332 may also adopt other digital circuits, and the embodiment is not limited thereto.

As an embodiment, the second circuit 330 may further include: and the second memory is used for storing the attribute of the USB cable. The second communication circuit 332 is connected to the second memory to read the attribute from the second memory and to send the attribute via the configuration channel line CC. As an example, the attributes of a USB cable may include current carrying capability, data carrying capability, vendor information, and the like. As an example, the memory may be a non-volatile, multi-time programmable memory.

As an embodiment, the first communication circuit 322, upon detecting the first identity discovery command signal via the configuration channel line CC, sends a first response signal via the configuration channel line CC to send a first voltage value; the second communication circuit 332, upon detecting the second identity finding command signal via the configuration channel line CC, sends a second response signal via the configuration channel line CC to send a second voltage value.

Referring to fig. 3, one end of the cable 310 is connected with a first connector, and the other end of the cable 310 is connected with a second connector. As an example, the first connector and the second connector are USB type C connectors. It should be understood that the first connector and the second connector of the present embodiment are not limited to the foregoing examples, and other types and combinations of connectors are also possible, and the present embodiment will not be described in detail.

In one embodiment, the first circuit 320 is integrated into an electronic tag chip. In one embodiment, the second circuit 230 is integrated with another electronic tag chip. As an example, the first terminal is connected to the terminal device (sink terminal), the second terminal is connected to the adapter (source terminal), the electronic tag chip integrated with the first circuit 320 is a chip closer to the terminal device, the terminal device obtains the first voltage value U1 at the first terminal through SOP', the electronic tag chip integrated with the second circuit 330 is a chip farther from the terminal device, and the terminal device can obtain the second voltage value U1 at the second terminal through SOP ″.

The following describes exemplary embodiments of the present disclosure with a USB type C cable as an example.

Fig. 4 illustrates a structural schematic diagram of a USB type C cable according to an exemplary embodiment of the present disclosure, and as illustrated in fig. 4, the USB type C cable 400 includes: USB

type C connectors

410a and 410b, and

electronic tag chips

420a and 420 b. The electronic tag chip 420a is connected to the USB type C connector 410a, and the electronic tag chip 420b is connected to the USB type C connector 410 b.

Referring to fig. 4, the electronic tag chip 420a is connected to one end of the power line VBUS to detect a voltage value U1 at the end of the power line VBUS; the electronic tag chip 420b is connected to the other end of the power line VBUS to detect the voltage value U2 at the end of the power line VBUS.

As an embodiment, the power pin of the electronic tag chip 420a is connected with the CC (configuration channel) 1 pin of the USB type C connector 310a to supply power through the CC1 pin; the power pin of the electronic tag chip 420b is connected to the CC1 pin of the USB type C connector 410b to supply power through the CC1 pin. The VCONN power supply is connected to pin CC1 for power. It should be understood that the circuit or method in the related art may also be used to supply power to the internal circuit and chip of the USB cable, and the embodiment of the present disclosure is not limited thereto.

In one embodiment, electronic tag chip 420a is connected to pin CC2 of USB type C connector 410a, and electronic tag chip 420b is connected to pin CC2 of USB type C connector 410 b.

As an example, in the case where the USB type C connector 410a is plugged into the sink, the sink communicates with the

electronic tag chips

420a and 420b through the USB type C connector 410a, acquires the voltage value U1 of one end of the power line VBUS from the electronic tag chip 420a via CC2, and acquires the voltage value U2 of the other end of the power line VBUS from the electronic tag chip 420b via CC 2. The electronic tag chip 420a is a chip closer to the suction end, and the voltage value U1 at one end of the power line VBUS can be obtained from the electronic tag chip 420a through the CC2 by an SOP' signal; the electronic tag chip 420b is further away from the suction end, and the voltage value U2 at one end of the power line VBUS can be obtained from the electronic tag chip 420b through the CC2 by SOP "signal.

As another example, in the case where USB type C connector 410b is plugged into the sink, the sink communicates with

electronic tag chips

420a and 420b through USB type C connector 410b, obtains voltage value U1 of one end of power line VBUS from electronic tag chip 420a via CC2, and obtains voltage value U2 of the other end of power line VBUS from electronic tag chip 420b via CC 2. The electronic tag chip 420b is a chip closer to the suction end, and the voltage value U2 at one end of the power line VBUS can be obtained from the electronic tag chip 420b through the CC2 by means of an SOP' signal; the electronic tag chip 420a is farther away from the suction end, and the voltage value U1 at one end of the power line VBUS can be obtained from the electronic tag chip 420b through the CC2 by SOP "signal.

Further, referring to fig. 4, the electronic tag chip 420a includes: a detection circuit 421a for detecting a voltage value U1 at a first end of the power line VBUS; a communication circuit 422a connected to the detection circuit 421a and the CC2 to transmit the voltage value U1 output from the detection circuit 421a via the CC 2; a power supply interface 423a connected to the CC 1; and a memory 424a for storing attributes of the USB cable. In one embodiment, after the power interface 423a is powered, the electronic tag chip 420a starts to operate, and the detection circuit 421a detects the voltage value U1 at the first end of the power line VBUS. The communication circuit 422a, upon detecting the first identity discovery command signal via CC2, transmits a first response signal via CC2 to transmit the voltage value U1.

Further, referring to fig. 4, the electronic tag chip 420b includes: a detection circuit 421b for detecting a voltage value U2 at the second end of the power line VBUS; a communication circuit 422b connected to the detection circuit 421b and the CC2 to transmit the voltage value U2 output from the first detection circuit 421b via the CC 2; a power supply interface 423b connected to the CC 1; and a memory 424b for storing attributes of the USB cable. In one embodiment, after the power interface 423b is powered, the electronic tag chip 420b starts to operate, and the detection circuit 421b detects the voltage value U2 at the second end of the power line VBUS. Communication circuit 422b, upon detecting the second identity discovery command signal via CC2, transmits a second response signal via CC2 to transmit voltage value U2.

It should be understood that the USB cable, the electronic tag circuit, and the electronic tag chip may further include other circuit modules, which are not described in detail in this disclosure.

A cable impedance detection method of a USB cable implemented using the present disclosure is described below.

Fig. 5 shows a flowchart of a cable impedance detection method according to an exemplary embodiment of the present disclosure, and as shown in fig. 5, the method includes steps S501 to S505.

Step S501, the terminal device detects whether the adapter is accessed.

Step S502, under the condition that the adapter is detected to be connected, the terminal equipment loads a fixed current I.

Step S503, the terminal device communicates with the electronic tag chip at one end of the USB cable power line, and obtains a voltage value U1 at the end of the USB cable power line through a communication command.

As an example, in step S503, the electronic tag chip is a chip closer to the terminal device, and the terminal device communicates with the electronic tag chip through the SOP' signal to obtain the voltage value U1 at the end of the power line of the USB cable.

In step S504, the terminal device communicates with the electronic tag chip at the other end of the power line of the USB cable, and obtains the voltage value U2 at the end of the power line of the USB cable through a communication command.

As an example, in step S504, the electronic tag chip is a chip far away from the terminal device, and the terminal device communicates with the electronic tag chip through an SOP "signal to obtain the voltage value U2 at the end of the power line of the USB cable.

In step S505, the terminal device calculates the wire impedance from R ═ U1-U2 |/I.

By the method, the impedance of the wire can be detected in real time, safety, reliability and universality are high, and the impedance of the wire can be detected in real time without the need of supporting a specific adapter voltage acquisition instruction by an adapter. After determining the wire impedance, the terminal device may determine the charging current based on the wire impedance to avoid damage to the USB cable due to excessive current.

It should be understood that, in this embodiment, the terminal device and the adapter are exemplarily shown, but this embodiment is not limited thereto, and the above method is applicable to any source end and sink end, which is not described in detail in this embodiment.

The electronic tag circuit, the chip and the USB cable for the USB cable provided by the present disclosure are introduced in detail above, and a specific example is applied in this document to illustrate the principle and the implementation of the present disclosure, and the description of the above embodiment is only used to help understand the method and the core idea of the present disclosure; meanwhile, for a person skilled in the art, according to the idea of the present disclosure, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present disclosure.

Claims

1. An electronic label circuit for a USB cable, comprising:

the detection circuit is used for detecting the voltage value of one end of a power line of the USB cable;

a communication circuit connected to the detection circuit and having a terminal for connecting a configuration channel line of the USB cable to transmit the voltage value via the terminal.

2. The electronic tag circuit according to claim 1, wherein the detection circuit comprises: and the analog-to-digital conversion module is used for sampling the voltage signal at the one end of the power line and converting the voltage signal into a digital signal to obtain the voltage value.

3. Electronic label circuit according to claim 1 or 2, characterized in that the communication circuit, upon detection of an identity finding command signal via the terminal, sends a response signal via the terminal to send the voltage value.

4. An electronic tag chip for a USB cable, characterized in that it comprises an electronic tag circuit according to any one of claims 1 to 3.

5. A USB cable, comprising:

a cable including a power line and a configuration channel line;

a first circuit comprising: the first detection circuit is used for detecting a first voltage value of a first end of the power line; a first communication circuit connected to the first detection circuit and a first end of the configuration channel line to transmit the first voltage value via the configuration channel line;

a second circuit comprising: the second detection circuit is used for detecting a second voltage value of a second end of the power line; a second communication circuit connected to the second detection circuit and the second end of the configuration channel line to transmit the second voltage value via the configuration channel line.

6. The USB cable of claim 5, wherein the first detection circuit comprises: and the first analog-to-digital conversion module is used for sampling the voltage signal of the first end of the power line and converting the voltage signal into a digital signal to obtain the first voltage value.

7. The USB cable of claim 5, wherein the second detection circuit comprises: and the second analog-to-digital conversion module is used for sampling the voltage signal of the second end of the power line and converting the voltage signal into a digital signal to obtain the second voltage value.

8. The USB cable according to claim 5,

the first communication circuit to send a first response signal via the configuration channel line to send the first voltage value upon detection of a first identity discovery command signal via the configuration channel line;

the second communication circuit, upon detecting a second identity discovery command signal via the configuration channel line, sends a second response signal via the configuration channel line to send the second voltage value.

9. The USB cable of claim 5, wherein the first circuit is integrated with the first electronic tag chip.

10. The USB cable of claim 5 or 9, wherein the second circuit is integrated with a second electronic tag chip.