CN113347011A - Communication device, system and communication method - Google Patents
Communication device, system and communication method Download PDFInfo
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- CN113347011A CN113347011A CN202110423350.9A CN202110423350A CN113347011A CN 113347011 A CN113347011 A CN 113347011A CN 202110423350 A CN202110423350 A CN 202110423350A CN 113347011 A CN113347011 A CN 113347011A
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- mobile terminal
- usb interface
- activation signal
- communication device
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/02—Details
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/30—Charge provided using DC bus or data bus of a computer
Abstract
The invention relates to a communication device, a system and a communication method, wherein the 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 for outputting an enabling signal if the mobile terminal is in a starting state and receives an activation signal, then the logic control circuit controls the switch circuit to be connected or disconnected with a connecting channel between the USB interface and the mobile terminal according to the enabling signal and the activation signal output by the USB interface, and the mobile terminal can output the enabling signal under the starting state and can be connected with the USB interface by combining the activation signal output by the USB interface, so that the condition that the mobile terminal is activated and charged once an external USB device is connected to the USB interface is avoided.
Description
Technical Field
The present invention relates to the field of data interface detection technologies, and in particular, to a communication device, a communication system, and a communication method.
Background
Most of mobile devices are powered by lithium batteries, and a common mobile device can be automatically triggered to be started or charged after a USB is plugged in.
However, under special requirements, for example, to avoid power consumption, the mobile device only needs to perform data communication with the background periodically, and the rest of the time is in the power-off state, and the mobile device is not allowed to be triggered to be powered on or charged once the external USB device is plugged.
Disclosure of Invention
Based on this, there is a need to provide a communication device that can avoid being automatically activated by USB.
A communication device, comprising:
a USB interface for outputting an activation signal;
the mobile terminal is connected with the USB interface and used for outputting an enabling signal if the mobile terminal is in a starting state and receives the activating signal;
the switch circuit is respectively connected with the USB interface and the mobile terminal;
and the logic control circuit is respectively connected with the switch circuit, the USB interface and the mobile terminal and is used for controlling the switch circuit to be connected or disconnected with a connection path between the USB interface and the mobile terminal according to the enabling signal and the activating signal.
In one embodiment, the communication device further comprises:
and the voltage reduction circuit is respectively connected with the USB interface, the mobile terminal and the logic control circuit and is used for carrying out voltage reduction processing on the activation signal.
In one embodiment, the voltage dropping circuit includes a first resistor and a second resistor, where one end of the first resistor is used for being connected to the USB interface, the other end of the first resistor is respectively connected to the mobile terminal, the logic control circuit, and a first end of the second resistor, and a second end of the second resistor is used for being connected to 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 a second positive data terminal and a second negative data terminal of the USB interface in a one-to-one correspondence manner so as to perform data transmission with the USB interface.
In one embodiment, the communication device further includes a power key, which is respectively connected to the mobile terminal and the ground terminal, and is configured to control an open/close state of the mobile terminal.
A communication system, comprising:
an external USB device; and
the communication device of any of the above.
A communication method applied to a communication device, comprising:
if the mobile terminal is in a starting state and receives an activation signal output by the USB interface, outputting an enabling signal; and controlling to switch on or off a connection path between the USB interface and the mobile terminal according to the enabling signal and the activating signal.
In one embodiment, before the mobile terminal receives the activation signal, the method further includes:
and carrying out voltage reduction processing on the activation signal.
In one embodiment, before the controlling to turn 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:
and carrying out voltage reduction processing on the activation signal.
In one embodiment, the method further comprises:
and triggering a power supply key to control the on-off state of the mobile terminal.
The communication equipment is provided with the USB interface, the mobile terminal, the switch circuit and the logic control circuit, wherein the mobile terminal is used for outputting an enabling signal if the mobile terminal is in a power-on state and receives an activating signal, then the logic control circuit controls the switch circuit to be connected or disconnected with a connecting channel between the USB interface and the mobile terminal according to the enabling signal and the activating signal output by the USB interface, the mobile terminal can output the enabling signal under the power-on state, and meanwhile, the mobile terminal can be connected with the USB interface by combining the activating signal output by the USB interface, so that the condition that the mobile terminal is activated and charged once an external USB device is connected to the USB interface is avoided.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the descriptions of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the following descriptions are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a block diagram of a communication device of an embodiment;
fig. 2 is a block diagram of a communication apparatus of another embodiment;
fig. 3 is a block diagram of a communication apparatus of another embodiment;
fig. 4 is a block diagram of a communication apparatus of another embodiment;
fig. 5 is a block diagram of a communication apparatus of another embodiment;
fig. 6 is a flowchart illustrating a communication method applied to a communication device according to an embodiment.
Element number description:
the communication device: 100, respectively; USB interface: 110; a first resistance: r1; a second resistance: r2; the first positive data terminal: d +; the first negative data terminal: d-; power key: s; a mobile terminal: 120 of a solvent; a switching circuit: 130, 130; the logic control circuit: 140 of a solvent; the voltage reduction circuit: 150
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Embodiments of the present application are set forth in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
It will be understood that, as used herein, the terms "first," "second," and the like may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, the first resistor R1 may be referred to as a second resistor R2, and similarly, the second resistor R2 may be referred to as a first resistor R1 without departing from the scope of the present application. The first resistor R1 and the second resistor R2 are both resistors, but they are not the same resistor.
It is to be understood that "connection" in the following embodiments is to be understood as "electrical connection", "communication connection", and the like if the connected circuits, modules, units, and the like have communication of electrical signals or data with each other.
As used herein, the singular forms "a", "an" and "the" may include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises/comprising," "includes" or "including," etc., specify 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 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 block diagram of a communication device 100 according to an embodiment, and 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, where the USB interface 110 is configured to output an activation signal; the mobile terminal 120 is connected to the USB interface 110, and configured to output an enable signal if the mobile terminal is in a power-on state and receives an activation signal; the switch circuit 130 is respectively connected with the USB interface 110 and the mobile terminal 120; the logic control circuit 140 is respectively connected to the switch circuit 130, the USB interface 110 and the mobile terminal 120, and is configured to control the switch circuit 130 to turn on or turn off a connection path between the USB interface 110 and the mobile terminal 120 according to the enable signal and the activation signal.
The USB interface 110 is configured to be connected to an external USB device, the mobile terminal 120, the switch circuit 130, and the logic control circuit 140 may be respectively connected to a VBUS pin of the USB interface 110, after the USB interface 110 is connected to the external USB device, the VBUS pin of the USB interface 110 outputs an activation signal, so as to transmit the activation signal 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 130 to be turned on according to an enable signal output by the mobile terminal 120 and the activation signal output by the USB interface 110, so that the mobile terminal 120 receives the activation signal output by the USB interface 110 through the switch circuit 130, and then enters an activation state, so that the USB interface 110 can transmit electric energy provided by the external USB device to the mobile terminal 120, so as to charge the mobile terminal 120.
It is understood that the enable signal is generated and outputted only when the mobile terminal 120 is in the power-on state and receives the activation signal outputted from the USB interface 110, and then the logic control circuit 140 controls the switch circuit 130 to switch 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, so that the connection path between the mobile terminal 120 and the USB interface 110 is switched on only when the mobile terminal 120 is in the power-on state and receives the activation signal while the USB interface 110 outputs the activation signal. When the mobile terminal 120 is in the power-off state, even if the USB interface 110 outputs the activation signal, the connection path between the mobile terminal 120 and the USB interface 110 is also disconnected, and the USB interface 110 cannot activate the mobile terminal 120 to power on, and cannot charge the mobile terminal 120.
In addition, the logic control circuit 140 controls the connection path between the USB interface 110 and the mobile terminal 120 according to the activation signal and the enable signal, so as to improve the reliability of the control, and compared with the method that only the enable signal is used to control the connection path, the method avoids the false triggering of the mobile terminal 120 caused by outputting a wrong enable signal, and finally executes a wrong control operation.
The communication device 100 of 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 the mobile terminal is in a power-on state and receives an activation signal, and then the logic control circuit 140 controls the switch circuit 130 to turn on or turn off a 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, and since the mobile terminal 120 can output the enable signal only when the mobile terminal is in the power-on state and can be turned on with the USB interface 110 only when the activation signal output by the USB interface 110 is needed, a situation that 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 is avoided.
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 the activation signal, and the enable signal is output through the EN pin if the mobile terminal 120 is in the on state and the INT pin receives the activation signal. The switch circuit is connected to the VCHG pin and the VBUS pin of the USB interface 110, and when the switch circuit is turned on, the VCHG pin and the VBUS pin are turned on, so that the VCHG pin receives an activation signal output by the VBUS pin, and further activates the mobile terminal 120, and the USB interface 110 can transmit electric energy provided by an external USB device to the mobile terminal 120 to charge the mobile terminal 120. The activation signal may be an INT interrupt signal, and the embodiment still uses the VCHG pin for detection, so that compared with using a GPIO pin instead of the VBUS pin for USB plug detection, part of functions of the communication device 100 are limited, and the embodiment has higher practicability.
Specifically, the activation signal and the enable signal are both high level signals, and when the logic control circuit 140 detects that both signals are high level signals, the logic control circuit outputs a control signal to instruct the switch circuit to connect 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 activation state, and further, the logic control circuit can receive the electric energy provided by the external USB device through the USB interface 110 to perform charging.
Fig. 2 is a block diagram of a communication device 100 according to another embodiment, and the embodiment only differs from the embodiment of fig. 1 in that the communication device 100 further includes a voltage-reducing circuit 150, and the voltage-reducing circuit 150 is respectively connected to the USB interface 110, the mobile terminal 120, and the logic control circuit 140, and is configured to perform voltage-reducing processing on the activation signal.
It can be understood that the voltage amplitude of the electrical signal outputted from the USB interface 110 is usually large, and is not suitable for being directly outputted to the mobile terminal 120 and outputted 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 input voltage of the INT pin of the mobile terminal 120 is usually 1.8V or 3.3V, so a voltage reduction circuit 150 may be disposed in the loop to perform voltage reduction processing on the activation signal, and then transmit the reduced activation signal to the mobile terminal 120 and the logic control circuit 140, respectively, thereby improving the circuit safety.
The voltage reducing circuit 150 may be any one of a transformer voltage reducing circuit, a resistor voltage reducing circuit, a capacitor voltage reducing circuit, or the like.
The communication device 100 of the embodiment of the present invention is provided with the voltage reduction circuit 150 respectively connected to the USB interface 110, the mobile terminal 120, and the logic control circuit 140, so as to perform voltage reduction processing on the activation signal output by the USB interface 110, and further transmit the voltage-reduced activation signal to the mobile terminal 120 and the logic control circuit 140, respectively, thereby improving circuit safety.
In one embodiment, the voltage reduction circuit 150 may employ a resistive voltage reduction circuit. Specifically, as shown in fig. 3, the voltage dropping circuit 150 includes a first resistor R1 and a second resistor R2, wherein one end of the first resistor R1 is used for being connected to the USB interface 110, the other end of the first resistor R1 is respectively connected to the mobile terminal 120, the logic control circuit 140 and a first end of the second resistor, and a second end of the second resistor R2 is used for being connected to the ground.
It can be understood that the first resistor R1 and the second resistor R2 are adopted as the voltage reduction circuit 150, which not only has good voltage reduction effect, but also has simple circuit, small space and low cost.
Fig. 4 is a block diagram of a communication device 100 according to another embodiment, which is different from the embodiment of fig. 1 only in 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 a second positive data terminal D + and a second negative data terminal D-of the USB interface 110 in a one-to-one correspondence manner, so as to perform data transmission with the USB interface 110.
It is understood that after the connection path between the USB interface 110 and the mobile terminal 120 is conducted, the mobile terminal 120 may further detect the communication protocol of the USB interface 110, so as to select whether to perform data transmission with the USB interface 110. When it is determined that data transmission is required, under the condition that the first positive data terminal D + and the first negative data terminal D-of the mobile terminal 120 are respectively connected with the second positive data terminal D + and the second negative data terminal D-of the USB interface 110 in a one-to-one correspondence manner, data transmission between the mobile terminal 120 and an 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.
Fig. 5 is a block diagram of a communication device 100 according to another embodiment, and the communication device 100 according to this embodiment is different from the communication device 100 according to the embodiment of fig. 1 only in that a power key S is further included, and the power key S is respectively connected to the mobile terminal 120 and a ground terminal, and is used for controlling an open/close state of the mobile terminal 120, as shown in fig. 5.
Specifically, the mobile terminal 120 is provided with a power control terminal W, the power control terminal W is connected to the power key S, and when the power key S is triggered, the power control terminal W is connected to the ground terminal, so that the mobile terminal 120 enters an on state. The power control end W may be a PON port of a control chip in the mobile terminal 120. When the key S is not triggered, the power control terminal W is disconnected from the ground terminal, and the mobile terminal 120 enters an off state.
An embodiment of the present invention further provides a communication system, which includes an external USB device and the communication device 100 in any of the above embodiments.
Specifically, the external USB device may be a device capable of performing power and/or data transmission with the communication device 100, such as a computer device or a printer device. In the communication system of the embodiment, the communication device 100 which cannot be automatically started and trigger charging when being connected to the external USB device is adopted, so that power loss is avoided, and the setting requirements of some special occasions are met.
An embodiment of the present invention further provides a communication method applied to a communication device, where the communication device includes a USB interface 110 and a mobile terminal 120 connected to the USB interface 110, and the communication method includes steps S610 to S620, as shown in fig. 6.
In step S610, if the mobile terminal 120 is in the power-on state and receives the activation signal output by the USB interface 110, an enable signal is output.
The activation signal is output by the USB interface 110 when the external USB device is connected, and when the mobile terminal 120 is in the power-on state and receives the activation signal, an enable signal may be output, where the enable signal may be output by the mobile device, or a detection device capable of detecting whether the mobile device is in the power-on state and receiving the activation signal.
In step S620, 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.
It is understood that the connection path between the USB interface 110 and the mobile terminal 120 must be conducted when the mobile terminal 120 is in the power-on state and the USB interface 110 outputs the activation signal. When the mobile terminal 120 is in the power-off state, even if an external USB device is connected to the USB interface 110 to enable the USB interface to output an activation signal, the connection path between the mobile terminal 120 and the USB interface 110 is also disconnected, and the USB interface 110 cannot activate the mobile terminal 120 to power on, and cannot charge the mobile terminal 120.
It can be understood that, the control of the power path between the USB interface 110 and the mobile terminal 120 is realized according to the activation signal and the enable signal, which can improve the reliability of the control, and compared with the control of the connection path only by the enable signal, the mobile terminal 120 is prevented from being triggered by outputting a wrong enable signal, and finally executing a wrong control action.
According to the communication method provided by the embodiment of the invention, the enable signal is output when the mobile terminal 120 is in the power-on state and receives the activation signal output by the USB interface 110, then the connection path between the USB interface 110 and the mobile terminal 120 is selected to be switched on or switched off according to the enable signal and the activation signal output by the USB interface 110, and the enable signal can be output only when the mobile terminal 120 is in the power-on state and can be switched on with the USB interface 110 only when the USB interface 110 outputs the activation signal, so that the situation that 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 is avoided.
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 the activation signal, and if the mobile terminal 120 is in a power-on state and the INT pin receives the activation signal, the enable signal is output, and if the enable signal and the activation signal are received at the same time, a connection path between the VCHG pin and the VBUS pin is conducted. Specifically, a switch circuit 130 may be disposed between the VCHG pin and the VBUS pin, and the switch circuit 130 is controlled to open and close to control the VCHG pin and the VBUS pin. When the connection path between the VCHG pin and the VBUS pin is turned on, the VCHG pin may receive an activation signal output by the VBUS pin, and further activate the mobile terminal 120, so that the USB interface 110 may 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 from 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 outputted from the USB interface 110 is usually large, and is not suitable for being directly outputted to the mobile terminal 120. To prevent the voltage value of the activation signal output by the USB interface 110 from being higher than the limit of the mobile terminal receiving voltage, for example, the activation signal output by the VBUS pin is usually a +5V voltage signal, while the input voltage of the INT pin of the mobile terminal 120 is usually 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 voltage-reducing circuit 150 may be disposed in the loop to reduce the voltage of the activation signal, and then transmit the reduced activation signal to the mobile terminal 120, so as to improve the circuit safety. The voltage reducing circuit 150 may be any one of a transformer voltage reducing circuit, a resistor voltage reducing circuit, a capacitor voltage reducing circuit, or the like.
In one embodiment, a resistive voltage dropping circuit may be employed. Specifically, the voltage dropping circuit 150 includes a first resistor R1 and a second resistor R2, wherein one end of the first resistor R1 is used for being connected to the USB interface 110, the other end of the first resistor R1 is respectively connected to the mobile terminal 120 and a first end of the second resistor, and a second end of the second resistor R2 is connected to the ground.
It can be understood that the first resistor R1 and the second resistor R2 are adopted as the voltage reduction circuit 150, which not only has good voltage reduction effect, but also has simple circuit, small space and low cost.
In one embodiment, before controlling 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, the step-down processing of the activation signal is further included.
It is understood that a logic control circuit 140 may be used to receive the enable signal and the activation signal, and the voltage limit of the voltage received by the logic control circuit 140 is usually small, while the voltage amplitude of the electrical signal output by the USB interface 110 is large, and thus it is not suitable for directly outputting 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 value of the voltage received by the logic control circuit 140, a voltage-reducing circuit 150 may be disposed in the loop to reduce the voltage of the activation signal, and then transmit the reduced activation signal to the logic control circuit 140, thereby improving the circuit safety. The voltage reducing circuit 150 may be any one of a transformer voltage reducing circuit, a resistor voltage reducing circuit, a capacitor voltage reducing circuit, or the like.
In one embodiment, the communication device may further include a power key respectively connected to the mobile terminal 120 and the ground, and the communication method may further include triggering the power key to control the on/off state of the mobile terminal 120.
Specifically, the mobile terminal 120 is provided with a power control end, the power control end is connected with a power key, when the power key is triggered to be closed, the power control end is connected with a ground end, and the mobile terminal 120 is in an open state; when the power button is turned off, the power control terminal is disconnected from the ground terminal, and the mobile terminal 120 is in an off state.
In the description herein, references to the description of "some embodiments," "other embodiments," "desired embodiments," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, a schematic description of the above terminology may not necessarily refer to the same embodiment or example.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A communication device, comprising:
a USB interface for outputting an activation signal;
the mobile terminal is connected with the USB interface and used for outputting an enabling signal if the mobile terminal is in a starting state and receives the activating signal;
the switch circuit is respectively connected with the USB interface and the mobile terminal;
and the logic control circuit is respectively connected with the switch circuit, the USB interface and the mobile terminal and is used for controlling the switch circuit to be connected or disconnected with a connection path between the USB interface and the mobile terminal according to the enabling signal and the activating signal.
2. The communication device of claim 1, further comprising:
and the voltage reduction circuit is respectively connected with the USB interface, the mobile terminal and the logic control circuit and is used for carrying out voltage reduction processing on the activation signal.
3. The communication device according to claim 2, wherein the voltage dropping circuit comprises a first resistor and a second resistor, wherein one end of the first resistor is used for connecting with the USB interface, the other end of the first resistor is respectively connected with the mobile terminal, the logic control circuit and a first end of the second resistor, and a second end of the second resistor is used for connecting with a ground terminal.
4. 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, and the first positive data terminal and the first negative data terminal are respectively connected with a second positive data terminal and a second negative data terminal of the USB interface in a one-to-one correspondence manner to perform data transmission with the USB interface.
5. The communication device according to claim 1, further comprising a power button respectively connected to the mobile terminal and the ground terminal for controlling the on/off state of the mobile terminal.
6. A communication system, comprising:
an external USB device; and
the communication device of any one of claims 1 to 5.
7. A communication method applied to a communication device, comprising:
if the mobile terminal is in a starting state and receives an activation signal output by the USB interface, outputting an enabling signal; and controlling to switch on or off a connection path between the USB interface and the mobile terminal according to the enabling signal and the activating signal.
8. The communication method according to claim 7, wherein before the mobile terminal receives the activation signal, the method further comprises:
and carrying out voltage reduction processing on the activation signal.
9. The communication method according to claim 7, wherein before the controlling to turn 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 comprises:
and carrying out voltage reduction processing on the activation signal.
10. The communication method of claim 7, wherein the method further comprises:
and triggering a power supply key to control the on-off state of the mobile terminal.
Priority Applications (2)
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| CN202110423350.9A CN113347011B (en) | 2021-04-20 | 2021-04-20 | Communication device, system and communication method |
| PCT/CN2021/129704 WO2022222439A1 (en) | 2021-04-20 | 2021-11-10 | Communication device and system, and communication method |
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| CN202110423350.9A CN113347011B (en) | 2021-04-20 | 2021-04-20 | Communication device, system and communication method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022222439A1 (en) * | 2021-04-20 | 2022-10-27 | 深圳市广和通无线股份有限公司 | Communication device and system, and communication method |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN113347011B (en) | 2022-11-15 |
| WO2022222439A1 (en) | 2022-10-27 |
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