CN108411310B - Interface circuits and electronics - Google Patents

Abstract

The embodiment of the present application discloses an interface circuit and an electronic device, wherein the interface circuit includes an interface and an identification circuit, wherein the interface includes a first detection pin, and the identification circuit includes a detection end; the detection end is connected to the first detection pin; the identification circuit inputs a detection signal to the first detection pin through the detection end; wherein the detection signal is used to suppress electrochemical corrosion between the first detection pin and the conductive liquid when the first detection pin contacts the conductive liquid. The embodiment of the present application can suppress electrochemical corrosion of the interface by allowing the conductive liquid to enter the first detection pin of the interface.

Description

Interface circuits and electronics

technical field

The present application relates to the technical field of terminals, and in particular, to an interface circuit and an electronic device.

Background technique

With the development of electronic devices such as smart phones, the hardware circuit design of the electronic devices is becoming more and more complicated. Electronic devices are generally equipped with a serial universal bus (Universal Serial Bus, USB) interface, and the USB interface is used for connection and communication between the electronic device and external devices. As a kind of USB interface, the TYPE-C interface has gradually become the mainstream of the USB interface because of its positive and negative plugging and unplugging. At present, the problem of electrochemical corrosion of TYPE-C interface is serious and needs to be solved urgently.

SUMMARY OF THE INVENTION

The embodiments of the present application provide an interface circuit and an electronic device, which can solve the problem of electrochemical corrosion of the interface.

A first aspect of the embodiments of the present application provides an interface circuit, including an interface and an identification circuit, wherein:

The interface includes a first detection pin, and the identification circuit includes a detection terminal;

the detection terminal is connected to the first detection pin;

The identification circuit inputs a detection signal to the first detection pin through the detection terminal; wherein, the detection signal is used to inhibit the first detection pin when the first detection pin is in contact with the conductive liquid. The feet are galvanically corroded with the conductive liquid.

A second aspect of the embodiments of the present application provides an electronic device, including a casing and the interface circuit of the first aspect of the embodiments of the present application, wherein a groove is formed on the casing, and the interface circuit includes an interface and a controller, and the interface circuit includes an interface and a controller. The interface is arranged in the groove.

The embodiments of the present application have the following beneficial effects:

The identification circuit inputs a detection signal to the first detection pin through the detection terminal; the detection signal is used to inhibit electrochemical corrosion of the first detection pin and the conductive liquid when the first detection pin is in contact with the conductive liquid. When the interface is not connected with an external device, even if the first detection pin of the interface enters the conductive liquid, the interface will not undergo electrochemical corrosion.

Description of drawings

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

1 is a schematic structural diagram of an interface circuit disclosed in an embodiment of the present application;

2 is a schematic diagram of the location of a TYPE-C interface disclosed in an embodiment of the present application;

3 is a schematic structural diagram of a TYPE-C interface disclosed in an embodiment of the present application;

4 is a schematic diagram of a connection between an identification circuit disclosed in an embodiment of the present application and a TYPE-C interface;

5 is a schematic structural diagram of another interface circuit disclosed in an embodiment of the present application;

6 is a schematic structural diagram of another interface circuit disclosed in an embodiment of the present application;

7 is a schematic structural diagram of a TYPE-C interface circuit disclosed in an embodiment of the present application;

FIG. 8 is a schematic structural diagram of an electronic device disclosed in an embodiment of the present application.

Detailed ways

In order to make those skilled in the art better understand the solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only It is a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

The terms "first", "second" and the like in the description and claims of the present application and the above drawings are used to distinguish different objects, rather than to describe a specific order. Furthermore, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes unlisted steps or units, or optionally also includes Other steps or units inherent in a process, product or equipment.

Reference herein to an "embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor a separate or alternative embodiment that is mutually exclusive of other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

In addition, the electronic devices involved in the embodiments of the present application may include various handheld devices with wireless communication functions, vehicle-mounted devices, wearable devices, computing devices, or other processing devices connected to wireless modems, as well as various forms of user equipment (User Equipment, UE), mobile station (Mobile Station, MS), terminal device (terminal device) and so on. For convenience of description, the above-mentioned devices are collectively referred to as electronic devices.

The embodiments of the present application will be described in detail below.

Please refer to FIG. 1. FIG. 1 is a schematic structural diagram of an interface circuit disclosed in an embodiment of the present application. As shown in FIG. 1, the interface circuit includes an interface 11 and an identification circuit 12, wherein:

The interface 11 includes a first detection pin 111, and the identification circuit 12 includes a detection terminal 121;

The first detection pin 111 is connected to the detection terminal 121;

The identification circuit 12 inputs a detection signal to the first detection pin 111 through the detection terminal 121; wherein, the detection signal is used to inhibit the first detection pin 111 from electrochemistry with the conductive liquid when the first detection pin 111 is in contact with the conductive liquid corrosion.

In the examples of this application, electrochemical corrosion means that the metal and the electrolyte form two electrodes to form a corrosion galvanic cell. Because the electrode potential of the metal is always lower than the electrode potential of the electrolyte, the metal is the negative electrode, and the metal and the electrolyte undergo a redox reaction. Losing electrons becomes metal oxides, causing corrosion to metals. Among them, metal, electrolyte and current loop are necessary conditions for electrochemical corrosion.

The conductive liquid may be a liquid containing electrolytes, such as mineral water, coffee, fruit juice drinks, tea drinks, carbonated drinks, and the like.

The interface circuit in the embodiment of the present application may be used for a serial universal bus (Universal Serial Bus, USB) interface. Specifically, it can be used for the TYPE-C interface. The TYPE-C interface is generally located at the bottom of the smartphone and is mostly used for charging, data transmission and other purposes. Please refer to FIG. 2 , which is a schematic diagram of the location of a TYPE-C interface disclosed in an embodiment of the present application. As shown in FIG. 2 , the interface 11 of the TYPE-C interface is located at the bottom of the smart phone. Among them, the TYPE-C interface supports forward and reverse insertion of external devices.

In this embodiment of the present application, the interface 11 may include multiple pins. Taking the TYPE-C interface as an example, it can include 24 pins. For example, please refer to FIG. 3 , which is a schematic structural diagram of a TYPE-C interface disclosed in an embodiment of the present application. As shown in Figure 3, the TYPE-C interface can include A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, B1, B2, B3, B4, B5, B6, B7, B8, B9, B10, B11, B12 have a total of 24 pins. Among them, A1, A12, B1, B12 are ground pins for grounding. A4, A9, B4, and B9 are power pins for connecting power. A2, A3, A10, A11, B2, B3, B10, B11 are high-speed signal transmission pins used to transmit high-speed data signals. A6, A7, B6, and B7 are USB data transmission pins, which are used to transmit differential data signals. A8 and B8 are auxiliary interfaces, providing auxiliary functions. In different application scenarios, A8 and B8 can be used for different purposes. A5 is the CC1 pin, B5 is the CC2 pin, the CC1 pin and the CC2 pin are used to determine the type of the external device connected to the interface 11, as well as to confirm the direction of data transmission, and to confirm that the inserted external device is being inserted Or anti-insert.

The first detection pin 111 in the embodiment of the present application corresponds to any one of the four ground pins A1, A12, B1, and B12. Since A1, A12, B1, and B12 are themselves ground pins, one of the above four ground pins is used as the first detection pin 111 in this application. The first detection pin 111 is disconnected from the ground terminal, and the other The 3 ground pins are still grounded. For example, please refer to FIG. 4 . FIG. 4 is a schematic diagram of a connection between an identification circuit and a TYPE-C interface disclosed in an embodiment of the present application. As shown in FIG. 4 , the first detection pin 111 is the A1 pin, so the A1 pin is disconnected from the ground terminal, and the A12, B1, and B12 are still grounded.

The pins in the interface are generally made of metal material. When the pins enter the conductive liquid, the conductive liquid is equivalent to the electrolyte. If the effective voltage on the pins reaches a certain value, the electrochemical corrosion of the pins and the conductive liquid will be accelerated. In the embodiment of the present application, the detection signal is used to suppress the electrochemical corrosion of the first detection pin 111 and the conductive liquid when the first detection pin 111 enters the conductive liquid. Generally speaking, when the rms voltage of the pin is higher than 1 volt, the pin and the conductive liquid entering the pin will undergo faster electrochemical corrosion. When the RMS voltage of the pin is lower than 1 volt, it is difficult for the pin and the conductive liquid entering the pin to galvanically corrode. In this embodiment of the present application, only by controlling the effective value of the detection signal to be less than 1 volt, the electrochemical corrosion of the first detection pin 111 and the conductive liquid entering the first detection pin 111 can be suppressed.

Optionally, the detection signal includes a low level signal or a pulse signal.

In the embodiment of the present application, the detection signal adopts a low-level signal or a pulse signal, which can ensure that the voltage effective value of the detection signal is low. When the voltage effective value of the detection signal is low (for example, lower than 1V), the first detection lead The pin 111 and the conductive liquid entering the first detection pin 111 are hard to be electrochemically corroded.

Among them, the voltage of the low-level signal is between 0.1 and 0.9V.

In the embodiment of the present application, the voltage range of the low-level signal is limited to 0.1-0.9V. If the voltage of the low-level signal is too high, it is easy to cause the first detection pin 111 and the voltage entering the first detection pin 111 to occur. The conductive liquid is electrochemically corroded. If the voltage of the low-level signal is too low, the level of the first detection pin 111 is easily disturbed, which will lead to false detection by the identification circuit 12 . The voltage of the low-level signal may be a fixed value between 0.1V and 0.9V. The low-level signal being a fixed voltage can be easily detected by the identification circuit 12 .

Among them, the voltage effective value of the pulse signal is less than 1V.

In the embodiment of the present application, when the effective value of the voltage of the detection signal is less than 1V, the first detection pin 111 and the conductive liquid entering the first detection pin 111 are unlikely to be electrochemically corroded.

Specifically, the duty cycle of the pulse signal is less than 20%, and the amplitude of the pulse signal is less than 5 volts.

In the embodiment of the present application, when the duty ratio of the pulse signal is less than 20%, the effective value of the pulse signal is low. The amplitude of the pulse signal is generally lower than 10V. When the duty cycle of the pulse signal is less than 20%, the effective value of the pulse signal is lower than 0.1V. When the RMS voltage of the pins of the interface 11 is lower than 1 volt, the pins of the interface 11 and the conductive liquid entering the pins of the interface 11 are unlikely to be electrochemically corroded. Setting the duty cycle of the pulse signal to be less than 20% can inhibit electrochemical corrosion of the pins of the interface 11 and the conductive liquid entering the pins of the interface 11 .

In the embodiment of the present application, when the amplitude of the pulse signal is less than 5 volts, the effective value of the pulse signal is low. When the duty cycle of the pulse signal is less than 20%, the effective value of the pulse signal is lower than 1 volt. When the RMS voltage of the pins of the interface 11 is lower than 1 volt, the pins of the interface 11 and the conductive liquid entering the pins of the interface 11 are unlikely to be electrochemically corroded.

Optionally, the identification circuit 12 is used to detect the level of the first detection pin 111 through the detection terminal 121 , and to determine that the interface 11 is connected to an external device when the level of the first detection pin 111 is the ground level.

The level of the first detection pin 111 is the level of the detection signal. If the detection signal is a low-level signal, the low-level signal is between 0.1 and 0.9V. When the interface 11 is not connected to an external device, the first detection The level of the pin 111 is between 0.1 and 0.9V. When the interface 11 is connected to an external device, the level of the first detection pin 111 is pulled to the ground level (ie, 0V). The identification circuit 12 can determine whether the interface 11 is connected to an external device by detecting whether the level of the first detection pin 111 is the ground level. When it is detected that the level of the first detection pin 111 is the ground level, it is determined that the interface 11 is connected to the external device; when it is detected that the level of the first detection pin 111 is not the ground level, it is determined that the interface 11 is not connected to the external device connect.

The function of the identification circuit 12 in the embodiment of the present application is to identify whether the interface 12 is connected to an external device. When the first detection pin 111 of the interface 12 is inserted into an external device, the identification circuit 12 determines whether the interface 12 is connected to the external device by detecting whether the level of the first detection pin 111 is the ground level.

Optionally, please refer to FIG. 5. FIG. 5 is a schematic structural diagram of another interface circuit disclosed in an embodiment of the present application. As shown in FIG. 5, the interface circuit further includes a controller 13. The controller 13 includes an input terminal 131, which identifies the The circuit 12 also includes a feedback terminal 122;

The input terminal 131 is connected to the feedback terminal 122;

The identification circuit 12 is further configured to send a handshake success signal to the controller 13 through the feedback terminal 122 after it is determined that the interface 11 is connected to the external device.

In this embodiment of the present application, the controller 13 may include a processor and a memory, where the processor is the control center of the electronic device, uses various interfaces and lines to connect various parts of the entire electronic device, and runs or executes software stored in the memory by running or executing the software stored in the memory. Programs and/or modules, as well as calling data stored in the memory, perform various functions of the electronic device and process data, so as to monitor the electronic device as a whole. Optionally, the processor may integrate an application processor and a modem processor, wherein the application processor mainly processes the operating system, user interface, and application programs, and the like, and the modem processor mainly processes wireless communication. It can be understood that, the above-mentioned modulation and demodulation processor may not be integrated into the processor.

The memory can be used to store software programs and modules, and the processor executes various functional applications and data processing of the electronic device by running the software programs and modules stored in the memory. The memory may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function, and the like; the storage data area may store data created according to the use of the electronic device, and the like. Additionally, the memory may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.

After the identification circuit 12 determines that the interface 11 is connected to the external device, it sends a handshake success signal to the controller 13 through the feedback terminal 122, and the handshake success signal is used to notify the controller 13 that the interface 11 has been inserted into the external device. The controller 13 in the embodiment of the present application does not need to detect whether the interface 11 is plugged into an external device, but confirms whether the interface 11 is plugged into an external device by receiving a handshake success signal sent by the identification circuit 12, which can save the power consumption of the controller 13.

Optionally, please refer to FIG. 6 , FIG. 6 is a schematic structural diagram of another interface circuit disclosed in an embodiment of the present application, and FIG. 6 is obtained by further optimization on the basis of FIG. 5 . As shown in FIG. 6 , the controller 13 further includes a first output end 132 and a second output end 133 , and the interface 11 further includes a second detection pin 112 and a third detection pin 113 ;

The second detection pin 112 is connected to the first output terminal 132, and the third detection pin 113 is connected to the second output terminal 133;

The controller 13 is further configured to identify the type of the external device through the first output end 132 and the second output end 133 after the input end 131 receives the handshake success signal sent by the identification circuit 12 .

In the embodiment of the present application, the interface 11 takes the TYPE-C interface as an example, the second detection pin 112 corresponds to the A5 pin of the TYPE-C interface, that is, the CC1 pin; the second detection pin 113 corresponds to the TYPE-C interface The B5 pin is the CC2 pin. The CC1 pin and the CC2 pin are used to determine the type of the external device connected to the interface 11, as well as to confirm the direction of data transmission, and to confirm whether the inserted external device is forwardly inserted or reversely inserted.

The specific way that the controller 13 identifies the type of the external device through the first output terminal 132 and the second output terminal 133 is: Three detection pins 113 level to determine the type of external device inserted.

Optionally, the controller 13 is further configured to close the outputs of the first output end 132 and the second output end 133 or connect the first output end 132 and the second output end before the input end 131 receives the handshake success signal sent by the identification circuit. The output level of terminal 133 is set to zero.

In the embodiment of the present application, the second detection pin 112 of the controller 13 is connected to the first output terminal 132 of the interface 11 , and the third detection pin 113 of the controller 13 is connected to the second output terminal 133 of the interface 11 . Before the input terminal 131 receives the handshake success signal sent by the identification circuit 12, that is, before no external device is inserted, the first output terminal 132 and the second output terminal 133 of the controller 13 turn off the output or the output level is zero (ie, the output is the ground level), that is, before no external device is inserted, the second detection pin 112 and the third detection pin 113 have no level signal, and when the interface 11 is not plugged into an external device, even if the second detection pin 112 and the third detection pin 112 The three detection pins 113 enter the conductive liquid, and electrochemical corrosion will not occur.

The principle of the present application is described below by taking the TYPE-C interface as an example. Please refer to FIG. 7. FIG. 7 is a schematic structural diagram of a TYPE-C interface circuit disclosed in an embodiment of the present application. As shown in FIG. 7 , A12, B1, and B12 of the TYPE-C interface 11 are grounded as ground pins. The original ground pin A1 of the TYPE-C interface 11 is modified into the first detection pin 111, and the first detection pin 111 receives the detection signal sent by the detection terminal 121 of the identification circuit 12. When the first detection pin 111 is inserted When the ground pin of the external device is used, the level of the first detection pin 111 is pulled to the ground level. At this time, the identification circuit 12 can recognize that the TYPE-C interface 11 is inserted into the external device, and the identification circuit 12 passes the feedback terminal 122. The handshake success signal is output to the input terminal 131 of the controller 13. The controller 13 knows through the handshake success signal that after the TYPE-C interface 11 is inserted into an external device, the first output terminal 132 and the second output terminal 133 of the controller 13 start outputting the device. The type detection signal is sent to the second detection pin 112 (ie: CC1 pin) and the third detection pin 113 (ie: CC2 pin) of the TYPE-C interface 11, and the device type detection signal is used to detect the insertion of TYPE-C Type of external device for interface 11. In terms of inhibiting galvanic corrosion, the embodiment of the present application does not use the traditional first output terminal 132 and second output terminal 133 of the controller 13 to detect the second detection pin 112 of the TYPE-C interface 11 (ie, the CC1 pin ) and the third detection pin 113 (ie: CC2 pin), but one of the ground pins of the TYPE-C interface 11 is modified into a detection pin for detecting the TYPE-C interface 11 through the identification circuit 12 Whether an external device is inserted, and the RMS voltage of the detection signal output by the identification circuit 12 to the first detection pin 111 of the TYPE-C interface 11 is low, even if the first detection pin 111 enters the conductive liquid, the first detection pin 111 also does not undergo galvanic corrosion. Before the TYPE-C interface 11 is inserted into the external device, the second detection pin 112 and the third detection pin 113 of the TYPE-C interface 11 have no level signal, even if the TYPE-C interface 11 enters the conductive liquid, it will not generate Electrochemical corrosion.

Optionally, the identification circuit 12 includes a micro-control unit or a comparator.

In the embodiment of the present application, a Microcontroller Unit (Microcontroller Unit, MCU) may be used to identify the change of the pulse signal. Comparators are used to identify changes in low-level signals.

An embodiment of the present application provides an electronic device, the electronic device includes a casing and an interface circuit, a groove is formed on the casing, the interface circuit includes an interface and a controller, and the interface is arranged in the groove.

The embodiment of the present application also provides an electronic device, as shown in FIG. 8 , for the convenience of description, only the part related to the embodiment of the present application is shown, and the specific technical details are not disclosed, please refer to the circuit of the embodiment of the present application part. The electronic device can be any terminal device including a mobile phone, a tablet computer, a PDA (Personal Digital Assistant, personal digital assistant), a POS (Point of Sales, a sales terminal), a vehicle-mounted computer, etc. The electronic device is a mobile phone as an example:

Please refer to FIG. 8 . FIG. 8 is a schematic structural diagram of an electronic device disclosed in an embodiment of the present application. In FIG. 8 , a mobile phone is used as an example for description. Referring to FIG. 8 , the mobile phone includes: a radio frequency (RF) circuit 910 , a memory 920 , an input unit 930 , a display unit 940 , a sensor 950 , an audio circuit 960 , a wireless fidelity (WiFi) module 970 , and a processor 980 , and power supply 990 and other components. Those skilled in the art can understand that the structure of the mobile phone shown in FIG. 8 does not constitute a limitation on the mobile phone, and may include more or less components than the one shown, or combine some components, or arrange different components.

The following is a detailed introduction to each component of the mobile phone with reference to Figure 8:

RF circuitry 910 may be used for the reception and transmission of information. Typically, the RF circuit 910 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a Low Noise Amplifier (LNA), a duplexer, and the like. In addition, RF circuitry 910 may communicate with networks and other devices via wireless communications. The above-mentioned wireless communication can use any communication standard or protocol, including but not limited to Global System of Mobile communication (GSM), General Packet Radio Service (General Packet Radio Service, GPRS), Code Division Multiple Access (Code Division Multiple Access) Access, CDMA), Wideband Code Division Multiple Access (Wideband Code Division Multiple Access, WCDMA), Long Term Evolution (Long Term Evolution, LTE), email, Short Messaging Service (Short Messaging Service, SMS) and the like.

The memory 920 can be used to store software programs and modules, and the processor 980 executes various functional applications and data processing of the mobile phone by running the software programs and modules stored in the memory 920 . The memory 920 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function, and the like; the storage data area may store data created according to the use of the mobile phone. Additionally, memory 920 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.

The input unit 930 may be used to receive inputted numerical or character information, and generate key signal input related to user setting and function control of the mobile phone. Specifically, the input unit 930 may include a fingerprint recognition module 931 and other input devices 932 . The fingerprint identification module 931 can collect the fingerprint data of the user on it. Besides the fingerprint recognition module 931 , the input unit 930 may also include other input devices 932 . Specifically, other input devices 932 may include, but are not limited to, one or more of a touch screen, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), trackballs, mice, joysticks, and the like.

The display unit 940 may be used to display information input by the user or information provided to the user and various menus of the mobile phone. The display unit 940 may include a display screen 941. Optionally, the display screen 941 may be configured in the form of a liquid crystal display (Liquid Crystal Display, LCD), an organic light-emitting diode (Organic Light-Emitting Diode, OLED), or the like. Although in FIG. 8 , the fingerprint recognition module 931 and the display screen 941 are used as two independent components to realize the input and input functions of the mobile phone, but in some embodiments, the fingerprint recognition module 931 and the display screen 941 can be combined Integrated to realize the input and playback functions of the mobile phone.

The cell phone may also include at least one sensor 950, such as a light sensor, a motion sensor, and other sensors. Specifically, the light sensor may include an ambient light sensor and a proximity sensor, wherein the ambient light sensor may adjust the brightness of the display screen 941 according to the brightness of the ambient light, and the proximity sensor may turn off the display screen 941 and/or when the mobile phone is moved to the ear. or backlight. As a kind of motion sensor, the accelerometer sensor can detect the magnitude of acceleration in all directions (usually three axes), and can detect the magnitude and direction of gravity when it is stationary. games, magnetometer attitude calibration), vibration recognition related functions (such as pedometer, tapping), etc.; as for other sensors such as gyroscope, barometer, hygrometer, thermometer, infrared sensor, etc. Repeat.

The audio circuit 960, the speaker 961, and the microphone 962 can provide an audio interface between the user and the mobile phone. The audio circuit 960 can convert the received audio data into an electrical signal, and transmit it to the speaker 961, and the speaker 961 converts it into a sound signal for playback; on the other hand, the microphone 962 converts the collected sound signal into an electrical signal, which is converted by the audio circuit 960 After receiving, the audio data is converted into audio data, and then processed by the audio data playback processor 980, and sent to, for example, another mobile phone through the RF circuit 910, or the audio data is played to the memory 920 for further processing.

WiFi is a short-distance wireless transmission technology. The mobile phone can help users to send and receive emails, browse web pages, and access streaming media through the WiFi module 970. It provides users with wireless broadband Internet access. Although FIG. 4 shows the WiFi module 970, it can be understood that it is not a necessary component of the mobile phone, and can be completely omitted as required within the scope of not changing the essence of the invention.

The processor 980 is the control center of the mobile phone, using various interfaces (for example, UART interface and USB interface) and lines to connect various parts of the entire mobile phone, by running or executing the software programs and/or modules stored in the memory 920, and calling The data stored in the memory 920 performs various functions of the mobile phone and processes data, so as to monitor the mobile phone as a whole. Optionally, the processor 980 may include one or more processing units; preferably, the processor 980 may integrate an application processor (AP) and a modem processor (Modem), wherein the application processor mainly processes the operating system, User interface and applications, etc., the modem processor mainly handles wireless communication. It can be understood that, the above-mentioned modulation and demodulation processor may not be integrated into the processor 980.

The mobile phone also includes a power supply 990 (such as a battery) for supplying power to various components. Preferably, the power supply can be logically connected to the processor 980 through a power management system, so as to manage charging, discharging, and power consumption management functions through the power management system.

The mobile phone may further include a camera 9100, and the camera 9100 is used for capturing images and videos, and transmitting the captured images and videos to the processor 980 for processing.

The mobile phone may also have a Bluetooth module, etc., which will not be repeated here.

In the above-mentioned embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

In the several embodiments provided in this application, it should be understood that the disclosed apparatus may be implemented in other manners. For example, the apparatus embodiments described above are only illustrative, for example, the division of the units is only a logical function division, and there may be other division methods in actual implementation, for example, multiple units or components may be combined or Integration into another system, or some features can be ignored, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical or other forms.

The units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

The embodiments of the present application are described in detail above, and specific examples are used in this paper to illustrate the principles and implementations of the present application. The descriptions of the above embodiments are only used to help understand the core idea of the present application; Persons of ordinary skill, according to the idea of the present application, will have changes in the specific implementation manner and application scope. In conclusion, the contents of this specification should not be construed as a limitation on the present application.

Claims (10)

1. an interface circuit, is characterized in that, comprises interface and identification circuit, wherein: The interface includes a first detection pin, the identification circuit includes a detection terminal, the interface is a TYPE-C interface, the TYPE-C interface includes 4 ground pins, and the first detection pin is the The pin that is disconnected from the ground of the 4 ground pins; the detection terminal is connected to the first detection pin; The identification circuit inputs a detection signal to the first detection pin through the detection terminal; wherein, the detection signal is used to inhibit the first detection pin when the first detection pin is in contact with the conductive liquid. Electrochemical corrosion occurs between the feet and the conductive liquid; The identification circuit is used to detect the level of the first detection pin through the detection terminal, and to determine that the interface is connected to an external device when the level of the first detection pin is the ground level . 2. The interface circuit according to claim 1, wherein the interface circuit further comprises a controller, the controller comprises an input terminal, and the identification circuit further comprises a feedback terminal; the input terminal is connected to the feedback terminal; The identification circuit is further configured to send a handshake success signal to the controller through the feedback terminal after it is determined that the interface is connected to the external device. 3. The interface circuit according to claim 2, wherein the controller further comprises a first output terminal and a second output terminal, and the interface further comprises a second detection pin and a third detection pin; the second detection pin is connected to the first output terminal, and the third detection pin is connected to the second output terminal; The controller is further configured to identify the type of the external device through the first output end and the second output end after the input end receives the handshake success signal sent by the identification circuit. 4 . The interface circuit according to claim 3 , wherein the controller is further configured to close the first output terminal and the first output terminal before the input terminal receives the handshake success signal sent by the identification circuit. 5 . The output of the second output terminal or the output level of the first output terminal and the second output terminal is set to zero. 5 . The interface circuit according to claim 1 , wherein the detection signal comprises a low-level signal or a pulse signal. 6 . 6 . The interface circuit according to claim 5 , wherein the identification circuit comprises a micro-control unit or a comparator, the micro-control unit is used to identify the change of the pulse signal, and the comparator is used to identify the Changes in low-level signals. 7 . The interface circuit according to claim 6 , wherein the voltage of the low-level signal is between 0.1V and 0.9V. 8 . 8 . The interface circuit according to claim 7 , wherein the effective value of the voltage of the pulse signal is less than 1V. 9 . 9 . The interface circuit according to claim 8 , wherein the duty cycle of the pulse signal is less than 20%, and the amplitude of the pulse signal is less than 5 volts. 10 . 10 . An electronic device, characterized in that the electronic device comprises a casing and the interface circuit according to any one of claims 1 to 9 , the casing is provided with a groove, and the interface circuit comprises an interface and an interface circuit. the controller, the interface is arranged in the groove.