WO2022222439A1

WO2022222439A1 - Communication device and system, and communication method

Info

Publication number: WO2022222439A1
Application number: PCT/CN2021/129704
Authority: WO
Inventors: 王宁宁; 李永永
Original assignee: 深圳市广和通无线股份有限公司
Priority date: 2021-04-20
Filing date: 2021-11-10
Publication date: 2022-10-27
Also published as: CN113347011A; CN113347011B

Abstract

The present invention relates to a communication device and system, and a communication method. The communication device is provided with a USB interface, a mobile terminal, a switch circuit, and a logic control circuit. The mobile terminal outputs an enable signal if the mobile terminal is in a power-on state and receives an activation signal, and then the logic control circuit controls, according to the enable signal and the activation signal output by the USB interface, the switch circuit to connect or disconnect a connection path between the USB interface and the mobile terminal. The mobile terminal outputs the enable signal only when being a power-on state, and is connected to the USB interface in combination with the activation signal output by the USB interface, so that the situation that the mobile terminal is activated and charged once an external USB device is connected to the USB interface is avoided.

Description

Communication device, system and communication method

This application claims the priority of the Chinese patent application filed on April 20, 2021 with the application number 2021104233509 and the application title is "Communication Equipment, System and Communication Method", the entire contents of which are incorporated into this application by reference .

technical field

The present invention relates to the technical field of data interface detection, in particular to a communication device, a system and a communication method.

Background technique

Most mobile devices are powered by lithium batteries. Usually, mobile devices can be automatically turned on or charged after a USB is inserted.

However, under some special requirements, for example, in order to avoid power consumption, the mobile device only needs to communicate with the background periodically, and the mobile device is in a shutdown state for the rest of the time. At this time, the mobile device is not allowed to be triggered to turn on or turn on once the external USB device is inserted. Charge.

SUMMARY OF THE INVENTION

Based on this, it is necessary to provide a communication device that can avoid being automatically activated by USB.

A communication device comprising:

USB interface for outputting activation signal;

a mobile terminal, connected to the USB interface, for outputting an enabling signal if it is in a power-on state and receiving the activation signal;

a switch circuit, respectively connected to the USB interface and the mobile terminal;

A logic control circuit is connected with the switch circuit, the USB interface and the mobile terminal respectively, and is used for controlling the switch circuit to turn on or off the USB interface and the mobile terminal according to the enable signal and the activation signal. connection paths between the mobile terminals.

In one of the embodiments, the communication device further includes:

A step-down circuit is connected to the USB interface, the mobile terminal and the logic control circuit respectively, and is used for step-down processing of the activation signal.

In one embodiment, the step-down circuit includes a first resistor and a second resistor, wherein one end of the first resistor is used to connect to the USB interface, and the other end of the first resistor is connected to the USB interface, respectively. The mobile terminal, the logic control circuit and the first end of the second resistor are connected, and the second end of the second resistor is used for connecting to the ground.

In one embodiment, the mobile terminal is configured with a first positive data terminal and a first negative data terminal, and the first positive data terminal and the first negative data terminal are respectively connected with the second positive data of the USB interface. The terminal and the second negative data terminal are connected in a one-to-one correspondence to perform data transmission with the USB interface.

In one embodiment, the communication device further includes a power button, which is respectively connected to the mobile terminal and the ground terminal, and is used to control the opening and closing states of the mobile terminal.

A communication system comprising:

external USB devices; and

The communication device of any one of the above.

A communication method applied to a communication device, comprising:

If the mobile terminal is in the power-on state and receives the activation signal output by the USB interface, it outputs an enable signal; according to the enable signal and the activation signal, the connection between the USB interface and the mobile terminal is controlled to be turned on or off. connection pathway.

In one of the embodiments, before the mobile terminal receives the activation signal, the method further includes:

Step-down processing is performed on the activation signal.

In one of the embodiments, before the control of turning on or off the connection path between the USB interface and the mobile terminal according to the enable signal and the activation signal, the method further includes:

Step-down processing is performed on the activation signal.

In one embodiment, the method further includes:

Trigger the power button to control the opening and closing state of the mobile terminal.

The above-mentioned communication device is provided with a USB interface, a mobile terminal, a switch circuit and a logic control circuit, wherein the mobile terminal is used to output an enable signal if it is in a power-on state and receives an activation signal, and then the logic control circuit outputs the enable signal and the USB interface. The activation signal controls the switch circuit to turn on or off the connection path between the USB interface and the mobile terminal, because the mobile terminal can only output the enable signal when it is turned on, and at the same time, the activation signal output by the USB interface can be connected to the USB interface. , to avoid the situation of activating the mobile terminal and charging the mobile terminal once an external USB device is connected to the USB interface.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or in the traditional technology, the following briefly introduces the accompanying drawings that are used in the description of the embodiments or the traditional technology. Obviously, the drawings in the following description are only the For some embodiments of the application, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without any creative effort.

1 is a structural block diagram of a communication device according to an embodiment;

2 is a structural block diagram of a communication device according to another embodiment;

3 is a structural block diagram of a communication device according to another embodiment;

4 is a structural block diagram of a communication device according to another embodiment;

5 is a structural block diagram of a communication device according to another embodiment;

FIG. 6 is a schematic flowchart of a communication method applied to a communication device according to an embodiment.

Component label description:

Communication equipment: 100; USB interface: 110; first resistance: R1; second resistance: R2; first positive data terminal: D+; first negative data terminal: D-; power button: S; mobile terminal: 120; switch circuit: 130; logic control circuit: 140; step-down circuit: 150

Detailed ways

In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the related drawings. Embodiments of the present application are presented in the accompanying drawings. However, the application may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs. The terms used herein in the specification of the application are for the purpose of describing specific embodiments only, and are not intended to limit the application.

It will be understood that the terms "first", "second", etc. used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish a first element from another element. For example, the first resistor R1 may be referred to as the second resistor R2, and similarly, the second resistor R2 may be referred to as the first resistor R1 without departing from the scope of this application. Both the first resistor R1 and the second resistor R2 are resistors, but they are not the same resistor.

It can be understood that the "connection" in the following embodiments should be understood as "electrical connection", "communication connection", etc. if the connected circuits, modules, units, etc. have electrical signals or data transmission between them.

As used herein, the singular forms "a," "an," and "the/the" can include the plural forms as well, unless the context clearly dictates otherwise. It should also be understood that the terms "comprising/comprising" or "having" etc. designate the presence of stated features, integers, steps, operations, components, parts or combinations thereof, but do not preclude the presence or addition of one or more Possibilities of other features, integers, steps, operations, components, parts or combinations thereof. Also, as used in this specification, the term "and/or" includes any and all combinations of the associated listed items.

FIG. 1 is a structural block diagram of a communication device 100 according to an embodiment. As shown in FIG. 1 , the communication device 100 includes a USB interface 110 , a mobile terminal 120 , a switch circuit 130 and a logic control circuit 140 , wherein the USB interface 110 is used to output activation signal; the mobile terminal 120 is connected to the USB interface 110 for outputting an enable signal if it is in a power-on state and an activation signal is received; the switch circuit 130 is respectively connected to the USB interface 110 and the mobile terminal 120; the logic control circuit 140 is respectively connected to the switch The circuit 130 , the USB interface 110 and the mobile terminal 120 are connected to control the switch circuit 130 to turn on or off the connection path between the USB interface 110 and the mobile terminal 120 according to the enable signal and the activation signal.

Among them, the USB interface 110 is used to connect with external USB devices, the mobile terminal 120, the switch circuit 130 and the logic control circuit 140 can be connected to the VBUS pin of the USB interface 110 respectively. After the USB interface 110 is connected to the external USB device, the USB interface The VBUS pin of 110 outputs an activation signal, which is transmitted to the mobile terminal 120, the switch circuit 130 and the logic control circuit 140, and then the logic control circuit 140 controls the switch circuit according to the enable signal output by the mobile terminal 120 and the activation signal output by the USB interface 110 130 is turned on, so that the mobile terminal 120 receives the activation signal output by the USB interface 110 through the switch circuit 130, and then enters the active state, so that the USB interface 110 can transmit the power provided by the external USB device to the mobile terminal 120, so that the mobile terminal 120 Charge.

It can be understood that the enable signal can be generated and output only when the mobile terminal 120 is in the power-on state and receives the activation signal output by the USB interface 110, and then the logic control circuit 140 controls the switch circuit 130 to turn on or off according to the enable signal and the activation signal. Disconnect the connection path between the USB interface 110 and the mobile terminal 120, so the connection path between the mobile terminal 120 and the USB interface 110 must be in the power-on state of the mobile terminal 120 and receive the activation signal, and the USB interface 110 has an output activation signal. can be turned on only in the case of . When the mobile terminal 120 is in the off state, even if the USB interface 110 outputs an activation signal, the connection path between the mobile terminal 120 and the USB interface 110 is disconnected, and the USB interface 110 cannot activate the mobile terminal 120 to power on, nor can the mobile terminal 120 be activated by the USB interface 110 . to charge.

In addition, the logic control circuit 140 realizes the control of the connection path between the USB interface 110 and the mobile terminal 120 according to the activation signal and the enable signal at the same time, which can improve the reliability of the control, compared to only relying on the enable signal to control the connection The channel is used to prevent the mobile terminal 120 from false triggering due to outputting a wrong enable signal, and finally executing a wrong control action.

The communication device 100 in the embodiment of the present invention is provided with a USB interface 110, a mobile terminal 120, a switch circuit 130, and a logic control circuit 140, wherein the mobile terminal 120 is configured to output an enable signal if it is in a power-on state and receives an activation signal, and then the logic The control circuit 140 controls the switch circuit 130 to turn on or off the connection path between the USB interface 110 and the mobile terminal 120 according to the enable signal and the activation signal output by the USB interface 110 , because the mobile terminal 120 can only output the enable signal when the mobile terminal 120 is turned on. At the same time, it can be connected to the USB interface 110 only under the condition of the activation signal output by the USB interface 110, so as to avoid the situation of activating and charging the mobile terminal 120 once an external USB device is connected to the USB interface 110.

In one embodiment, the mobile terminal 120 is configured with an EN pin, an INT pin and a VCHG pin, wherein the INT pin is connected to the VBUS pin of the USB interface 110 to receive an activation signal, if the mobile terminal 120 is powered on status and the INT pin receives an activation signal, the enable signal is output through the EN pin. The switch circuit is respectively connected with the VCHG pin and the VBUS pin of the USB interface 110. When the switch circuit is turned on, the VCHG pin and the VBUS pin are connected, so that the VCHG pin receives the activation signal output by the VBUS pin, and then activates the The mobile terminal 120 enables the USB interface 110 to transmit power provided by an external USB device to the mobile terminal 120 to charge the mobile terminal 120 . The activation signal can be an INT interrupt signal. In this embodiment, the VCHG pin is still used for detection. Compared with using the GPIO pin to replace the VBUS pin for USB plug-in detection, some functions of the communication device 100 are limited. The practicality of the embodiment is higher.

Specifically, the activation signal and the enable signal are both high-level signals. When the logic control circuit 140 detects that both signals are high-level signals, it outputs a control signal to instruct the switch circuit to switch on the VBUS pin of the USB interface 110 and the VCHG pin of the mobile terminal 120, so that the mobile terminal 120 enters an active state, and then can receive power provided by an external USB device through the USB interface 110 for charging.

FIG. 2 is a structural block diagram of a communication device 100 according to another embodiment. The only difference between this embodiment and the embodiment in FIG. 1 is that the communication device 100 further includes a step-down circuit 150. The step-down circuit 150 is connected to the USB interface 110, the mobile The terminal 120 is connected to the logic control circuit 140, and is used for reducing the voltage of the activation signal.

It can be understood that the voltage amplitude of the electrical signal output by the USB interface 110 is generally large, which is not suitable for being directly output to the mobile terminal 120 and to the logic control circuit 140 . In order to prevent the voltage value of the activation signal output by the USB interface 110 from being higher than the limit of the voltage received by the mobile terminal 120 and the logic control circuit 140, for example, the activation signal output by the VBUS pin is usually a +5V voltage signal, and the INT of the mobile terminal 120 The input voltage of the pin is generally 1.8V or 3.3V, so a step-down circuit 150 can be set in the loop to step down the activation signal, and then transmit the step-down activation signal to the mobile terminal 120 and the logic respectively. Control circuit 140, thereby improving circuit safety.

The step-down circuit 150 may be any one of a transformer step-down circuit, a resistor step-down circuit, a capacitor step-down circuit, and the like.

The communication device 100 according to the embodiment of the present invention is provided with a step-down circuit 150 respectively connected to the USB interface 110 , the mobile terminal 120 and the logic control circuit 140 , so as to perform step-down processing on the activation signal output by the USB interface 110 , and further reduce the voltage The latter activation signal is respectively transmitted to the mobile terminal 120 and the logic control circuit 140, thereby improving circuit safety.

In one embodiment, the step-down circuit 150 may use a resistive step-down circuit. Specifically, as shown in FIG. 3 , the step-down circuit 150 includes a first resistor R1 and a second resistor R2, wherein one end of the first resistor R1 is used to connect with the USB interface 110, and the other end of the first resistor R1 is connected to the mobile The terminal 120 and the logic control circuit 140 are connected to the first end of the second resistor, and the second end of the second resistor R2 is used for connecting to the ground.

It can be understood that using the first resistor R1 and the second resistor R2 as the step-down circuit 150 not only has a good step-down effect, but also has a simple circuit, small occupied space, and low cost.

FIG. 4 is a structural block diagram of the communication device 100 according to another embodiment. The difference between this embodiment and the embodiment in FIG. 1 is only that the mobile terminal 120 is further configured with a first positive data terminal D+ and a first negative data terminal D-, The first positive data terminal D+ and the first negative data terminal D- are respectively connected to the second positive data terminal D+ and the second negative data terminal D- of the USB interface 110 in a one-to-one correspondence for data transmission with the USB interface 110 .

It can be understood that after the connection path between the USB interface 110 and the mobile terminal 120 is turned on, the mobile terminal 120 can also detect the communication protocol of the USB interface 110 to select whether to perform data transmission with the USB interface 110 . When it is confirmed that data transmission is required, the first positive data terminal D+ and the first negative data terminal D- of the mobile terminal 120 are in one-to-one correspondence with the second positive data terminal D+ and the second negative data terminal D- of the USB interface 110 respectively. In the case of connection, the data transmission between the mobile terminal 120 and the external USB device is realized through the first positive data terminal D+, the first negative data terminal D-, the second positive data terminal and the second negative data terminal, respectively.

5 is a structural block diagram of a communication device 100 according to another embodiment. The communication device 100 of this embodiment is different from the communication device 100 of the embodiment of FIG. 120 is connected to the ground terminal, and is used to control the opening and closing state of the mobile terminal 120, as shown in FIG. 5 .

Specifically, the mobile terminal 120 is provided with a power control terminal W, and the power control terminal W is connected to the power button S. When the power button S is triggered, the power control terminal W is connected to the ground terminal, so that the mobile terminal 120 is turned on. . The power control terminal W may be the PON port of the control chip in the mobile terminal 120 . When the button S is not triggered, the power control terminal W is disconnected from the ground terminal, and the mobile terminal 120 enters the off state.

An embodiment of the present invention further provides a communication system, including an external USB device and the communication device 100 of any of the foregoing embodiments.

Specifically, the external USB device may be a device capable of transmitting power and/or data with the communication device 100, such as a computer device or a printer device. In the communication system of this embodiment, since the communication device 100 that does not automatically turn on and trigger charging when connected to an external USB device is used, power consumption is avoided, and settings in some special occasions are satisfied.

The embodiment of the present invention also provides a communication method applied to a communication device, the communication device includes a USB interface 110 and a mobile terminal 120 connected to the USB interface 110, the communication method includes steps S610 to S620, as shown in FIG. 6 .

Step S610, if the mobile terminal 120 is in the power-on state and receives the activation signal output by the USB interface 110, it outputs the enable signal.

The activation signal is output by the USB interface 110 when it is connected to an external USB device. When the mobile terminal 120 is powered on and receives the activation signal, it can output an enable signal, which can be output by the mobile device, or can detect movement A device output that detects whether the device is powered on and receives an activation signal.

Step S620, control to turn on or off the connection path between the USB interface 110 and the mobile terminal 120 according to the enable signal and the activation signal.

It can be understood that the connection path between the USB interface 110 and the mobile terminal 120 can be turned on only when the mobile terminal 120 is turned on and the USB interface 110 outputs an activation signal. When the mobile terminal 120 is turned off, even if an external USB device is connected to the USB interface 110 so that the USB interface outputs an activation signal, the connection path between the mobile terminal 120 and the USB interface 110 is disconnected, and the USB interface 110 cannot activate the mobile terminal Even when the mobile terminal 120 is turned on, the mobile terminal 120 cannot be charged.

It can be understood that the control of the power supply path between the USB interface 110 and the mobile terminal 120 is realized according to the activation signal and the enable signal at the same time, which can improve the reliability of the control. Compared with only relying on the enable signal to control the connection path, avoiding This prevents the mobile terminal 120 from outputting an erroneous enable signal and causing a false trigger, and finally executes an erroneous control action.

The communication method according to the embodiment of the present invention outputs an enable signal when the mobile terminal 120 is in a powered-on state and receives an activation signal output by the USB interface 110 , and then selects to turn on or turn on according to the enable signal and the activation signal output from the USB interface 110 Disconnect the connection path between the USB interface 110 and the mobile terminal 120, because the mobile terminal 120 can only output the enabling signal when the mobile terminal 120 is in the open state, and at the same time, the USB interface 110 can be connected to the USB interface 110 only when the USB interface 110 outputs the activation signal, so as to avoid The mobile terminal 120 is activated and the mobile terminal 120 is charged once an external USB device is connected to the USB interface 110 .

In one embodiment, the mobile terminal 120 is configured with an INT pin and a VCHG pin, wherein the INT pin and the VCHG pin are respectively connected to the VBUS pin of the USB interface 110 to receive an activation signal, if the mobile terminal 120 is in the In the power-on state and the INT pin receives the activation signal, the enable signal is output. If the enable signal and the activation signal are received at the same time, the connection path between the VCHG pin and the VBUS pin is turned on. Specifically, a switch circuit 130 can be arranged between the VCHG pin and the VBUS pin, and the on and off of the VCHG pin and the VBUS pin can be controlled by controlling the opening and closing of the switch circuit 130 . When the connection path between the VCHG pin and the VBUS pin is turned on, the VCHG pin can receive the activation signal output by the VBUS pin, and then activate the mobile terminal 120, so that the USB interface 110 can transmit the power provided by the external USB device. to the mobile terminal 120 to charge the mobile terminal 120 . The mobile terminal 120 may be configured with an EN pin, and the enable signal may be output by the EN pin of the mobile terminal 120 .

In one embodiment, before the mobile terminal 120 receives the activation signal, it further includes performing a voltage reduction process on the activation signal.

It can be understood that the voltage amplitude of the electrical signal output by the USB interface 110 is generally large, which is not suitable for being directly output to the mobile terminal 120 . In order to prevent the voltage value of the activation signal output by the USB interface 110 from being higher than the limit of the voltage received by the mobile terminal, for example, the activation signal output by the VBUS pin is usually a +5V voltage signal, and the input voltage of the INT pin of the mobile terminal 120 is generally It is 1.8V or 3.3V, so the activation signal can be stepped down before the mobile terminal 120 receives the activation signal. For example, a step-down circuit 150 may be provided in the loop to perform step-down processing on the activation signal, and then transmit the step-down activation signal to the mobile terminal 120, thereby improving circuit safety. The step-down circuit 150 may be any one of a transformer step-down circuit, a resistor step-down circuit, a capacitor step-down circuit, and the like.

In one embodiment, a resistive step-down circuit may be employed. Specifically, the step-down circuit 150 includes a first resistor R1 and a second resistor R2, wherein one end of the first resistor R1 is used to connect to the USB interface 110, and the other end of the first resistor R1 is connected to the mobile terminal 120 and the second resistor respectively. The first end of the resistor R2 is connected to the ground, and the second end of the second resistor R2 is connected to the ground.

In one embodiment, before the connection path between the USB interface 110 and the mobile terminal 120 is controlled to be turned on or off according to the enable signal and the activation signal, the step of reducing the voltage of the activation signal is further included.

It can be understood that a logic control circuit 140 can be used to receive the enable signal and the activation signal. Because the voltage limit of the voltage received by the logic control circuit 140 is generally small, and the voltage amplitude of the electrical signal output by the USB interface 110 is relatively large, it is not suitable for direct output to the logic control circuit 140 . In order to prevent the voltage value of the activation signal output by the USB interface 110 from being higher than the limit of the voltage received by the logic control circuit 140, a step-down circuit 150 can be set in the loop to reduce the voltage of the activation signal, and then reduce the voltage. The latter activation signal is transmitted to the logic control circuit 140, thereby improving circuit safety. The step-down circuit 150 may be any one of a transformer step-down circuit, a resistor step-down circuit, a capacitor step-down circuit, and the like.

In one embodiment, the communication device may further include a power button, which is respectively connected to the mobile terminal 120 and the ground. The communication method may further include triggering the power button to control the opening and closing state of the mobile terminal 120 .

Specifically, the mobile terminal 120 is provided with a power control terminal, which is connected to the power button. When the power button is triggered to be closed, the power control terminal is connected to the ground terminal, and the mobile terminal 120 is in an on state; when the power button is disconnected , the power control terminal is disconnected from the ground terminal, and the mobile terminal 120 is in a closed state.

In the description of this specification, reference to the description of the terms "some embodiments," "other embodiments," "ideal embodiments," etc. means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in the present specification. at least one embodiment or example of the invention. In this specification, schematic descriptions of the above terms do not necessarily refer to the same embodiment or example.

The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity, all possible combinations of the technical features in the above-described embodiments are not described. However, as long as there is no contradiction between the combinations of these technical features, All should be regarded as the scope described in this specification.

The above-mentioned embodiments only represent several embodiments of the present invention, and the descriptions thereof are specific and detailed, but should not be construed as a limitation on the scope of the invention patent. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can also be made, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the appended claims.

Claims

A communication device comprising:

USB interface for outputting activation signal;

a mobile terminal, connected to the USB interface, for outputting an enabling signal if it is in a power-on state and receiving the activation signal;

a switch circuit, respectively connected to the USB interface and the mobile terminal;

A logic control circuit is connected with the switch circuit, the USB interface and the mobile terminal respectively, and is used for controlling the switch circuit to turn on or off the USB interface and the mobile terminal according to the enable signal and the activation signal. connection paths between the mobile terminals.
The communication device of claim 1, further comprising:

A step-down circuit is connected to the USB interface, the mobile terminal and the logic control circuit respectively, and is used for step-down processing of the activation signal.
The communication device according to claim 2, wherein the step-down circuit comprises a first resistor and a second resistor, wherein one end of the first resistor is used for connecting with the USB interface, and the other end of the first resistor is used for connecting with the USB interface. One end is respectively connected to the mobile terminal, the logic control circuit and the first end of the second resistor, and the second end of the second resistor is used for connecting to the ground.
The communication device according to claim 1, wherein the mobile terminal is configured with a first positive data terminal and a first negative data terminal, the first positive data terminal and the first negative data terminal are respectively connected to the USB interface The second positive data terminal and the second negative data terminal are connected in a one-to-one correspondence to perform data transmission with the USB interface.
The communication device according to claim 1, further comprising a power button, which is respectively connected to the mobile terminal and the ground terminal, and is used to control the opening and closing states of the mobile terminal.
The communication device according to claim 2, wherein the step-down circuit is a transformer step-down circuit, a resistance step-down circuit or a capacitor step-down circuit.
A communication system comprising:

external USB devices; and

The communication device of any one of claims 1 to 6.
The communication system according to claim 7, wherein the external USB device is a device capable of power and/or data transmission with the communication device.
A communication method applied to a communication device, comprising:

If the mobile terminal is in the power-on state and receives the activation signal output by the USB interface, output the enable signal;

The connection path between the USB interface and the mobile terminal is controlled to be turned on or off according to the enable signal and the activation signal.
The communication method according to claim 9, further comprising: before the mobile terminal receives the activation signal,

Step-down processing is performed on the activation signal.
The communication method according to claim 9, further comprising: before the control of turning on or off the connection path between the USB interface and the mobile terminal according to the enable signal and the activation signal,

Step-down processing is performed on the activation signal.
The communication method according to claim 9, further comprising:

Trigger the power button to control the opening and closing state of the mobile terminal.