JP2019015730A - Electronic device including moisture recognition function, moisture recognition method, and moisture recognition system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic device including a moisture recognition function for preventing corrosion of a connector, a moisture recognition method thereof, and a moisture recognition system by accurately determining a state in which water has flowed in and a dry state. An electronic device according to the present invention is connected to an external cable, is connected to a connector including a plurality of pins, and one or more first pins of the plurality of pins, and is detected from the first pin. A first moisture detection circuit that generates a first detection result based on the resistance is connected to one or more second pins among the plurality of pins, and the first detection result is the first pin. If it indicates that moisture is present in the connector, it enters the moisture detection mode, generates a second detection result based on the resistance detected from the second pin, and based on the second detection result, the connector It includes a second moisture detection circuit that detects whether or not moisture is present. [Selection diagram] Fig. 1

Description

  The present invention relates to an electronic device including a moisture recognition function, and more particularly to an electronic device capable of improving the accuracy of moisture recognition and drying recognition, a moisture recognition method thereof, and a moisture recognition system.

In order to prevent corrosion of the connector, it is necessary to accurately determine moisture recognition when moisture flows into the connector.
In addition, it is necessary to make an accurate determination when moisture has dried in a state where moisture has flowed.
The reason is that the pin corrodes when a current flows through the connector in a state where moisture has flowed.

  Therefore, it is necessary for an electronic device employing a connector to prevent pin corrosion by accurately determining the state in which moisture has flowed into the connector and the condition in which the connector has been dried. There is a problem that the accuracy of determining the moisture inflow and the drying state is lowered due to factors.

The present invention has been made in view of the problems in the conventional connector described above, and an object of the present invention is to prevent corrosion of the connector by accurately determining the state of moisture inflow and the state of drying. It is to provide a moisture recognition method.
Another object of the present invention is to provide an electronic device including a moisture recognition function and a moisture recognition system.

  An electronic device according to the present invention made to achieve the above object is an electronic device, which is connected to an external cable and includes a connector including a plurality of pins, and at least one first of the plurality of pins. A first moisture detection circuit connected to a pin and generating a first detection result based on a resistance detected from the first pin; and connected to one or more second pins of the plurality of pins; If the first detection result indicates that moisture is present in the first pin, the first detection result is entered, and a second detection result is generated based on the resistance detected from the second pin; And a second moisture detection circuit for detecting whether moisture exists in the connector based on a second detection result.

  A method for recognizing moisture in an electronic device according to the present invention made to achieve the above object is a method for recognizing moisture in an electronic device, which is detected from a first pin of a connector including a plurality of pins by a first integrated circuit. A step of generating a first detection result based on a resistance value, and if the first detection result indicates that moisture exists in the connector, is detected from the second pin of the connector by the second integrated circuit A step of generating a second detection result based on the resistance value, and a first indicating that moisture exists in the connector when both the first detection result and the second detection result indicate that moisture exists. Generating a recognition result.

  To achieve the above object, the moisture recognition system according to the present invention includes a CC integrated circuit connected to a CC (configuration channel) 1 pin and a CC2 pin of a connector defined by a USB type C interface in the moisture recognition system. The CC integrated circuit receives a first moisture detection result from the outside via the first pin of the connector, enters a moisture detection mode based on the first moisture detection result, and detects the moisture detection In the mode, whether or not moisture exists in the connector is detected through the second pin of the connector.

  According to the electronic device including the moisture recognition function, the moisture recognition method, and the moisture recognition system according to the present invention, it is possible to accurately determine the situation where moisture has flowed in and the situation where the moisture has been dried, thereby improving the accuracy of moisture recognition and dry recognition. can do.

It is a block diagram which shows schematic structure of the electronic device by one Embodiment of this invention. It is a block diagram which shows one example of the 1st moisture detection circuit of FIG. It is a block diagram which shows one example of the 2nd moisture detection circuit of FIG. It is a figure for demonstrating control of the operation mode of a 2nd moisture detection circuit. FIG. 5 is a connector diagram illustrating an example in which the connector according to the exemplary embodiment of the present invention is applied to a connector of a USB type-C structure. It is a figure which shows an example of the 1st pin and 2nd pin which are selected for moisture detection. It is a flowchart for demonstrating the moisture recognition method by one Embodiment of this invention. 5 is a flowchart illustrating a method for performing moisture recognition and drying recognition according to an exemplary embodiment of the present invention. 5 is a flowchart illustrating a method for performing moisture recognition and drying recognition according to an exemplary embodiment of the present invention. 5 is a flowchart illustrating a method for performing moisture recognition and drying recognition according to an exemplary embodiment of the present invention. FIG. 6 is a diagram illustrating an example of detecting moisture using various pins according to an exemplary embodiment of the present invention. FIG. 6 is a diagram illustrating an example of detecting moisture using various pins according to an exemplary embodiment of the present invention. FIG. 6 is a diagram illustrating an example of detecting moisture using various pins according to an exemplary embodiment of the present invention. It is a block diagram which shows the modification of a structure of CCIC contained in the electronic device by one Embodiment of this invention. 4 is a flowchart for explaining a deformable moisture recognition method according to an embodiment of the present invention. 4 is a flowchart for explaining a deformable moisture recognition method according to an embodiment of the present invention.

  Next, a specific example of an embodiment of an electronic device including a moisture recognition function, a moisture recognition method thereof, and a moisture recognition system according to the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing a schematic configuration of an electronic device according to an embodiment of the present invention.
Referring to FIG. 1, the electronic device 100 includes a connector 110 that is connected to an external cable and performs communication between the external device and the electronic device 100.
There are various types of connectors 110, and they are also connectors that receive external cables such as electrical connectors, cable connectors, ports, wired interfaces, and bus interfaces.
In addition, the electronic device 100 includes a first moisture detection circuit 120 and a second moisture detection circuit 130 connected to pins included in the connector 110.
In addition, the electronic device 100 includes a processor that controls the overall operation of the electronic device 100. As an example, the electronic device 100 includes an application processor (AP) 140.

Each of the first moisture detection circuit 120 and the second moisture detection circuit 130 is also implemented by an integrated circuit (IC).
As an example, each of the first moisture detection circuit 120 and the second moisture detection circuit 130 includes a circuit that can detect resistance from a pin included in the connector 110.
That is, when moisture flows into a pin included in the connector 110 (or when moisture exists in the connector 110), the resistance value detected from the pin varies, and the first moisture detection circuit 120 and the second moisture detection circuit. Each of 130 can detect the presence of moisture by detecting the variable resistance.

The connector 110 can have various structures.
Embodiments of the present invention prevent connector corrosion by determining the presence of moisture (or other types of liquid components, corrosive substances, etc.) and dry conditions in connectors of various structures. Disclosed is a method for recognizing moisture.
In the following embodiments, a USB type-C connector structure is disclosed as one structure of the connector, and a system that uses the USB type-C connector structure to determine moisture inflow as a resistance is disclosed.

However, the embodiments of the present invention can be applied to other various structures of connectors in the same or similar manner.
As an example, embodiments of the present invention may be applied to other types of USB connector structures (eg, USB type_A, USB type_B, micro USB, etc.), or HDMI® connector structures, RJ-45 connectors. The present invention can also be applied to a serial port connector structure, a parallel port connector structure, a coaxial connector structure, and the like.

If moisture flows into the connector 110, the electronic device 100 can detect resistances having different values from the pins, thereby recognizing the moisture.
Recognizing moisture may include a concept of recognizing that moisture exists in the connector 110 or recognizing that moisture in the connector 110 is dry.

According to one embodiment, the electronic apparatus 100 can determine whether or not resistance variation due to the presence of moisture occurs by using a region in the connector 110 that does not affect the USB type-C operation.
In the absence of moisture, an infinite resistance is detected from the pin as a floating state, while in the presence of moisture, a small value that is not an infinite resistance (for example, several kilos to several megaohms ( ohm)) is detected.
There are various methods for monitoring resistance, and the electronic apparatus 100 can detect a variation in the resistance value by selectively using various resistance monitoring methods.

The electronic device 100 according to various embodiments of the present application includes, for example, a smartphone, a tablet personal computer, a mobile phone, a video phone, an e-book reader, and a desktop PC (e-book reader). desktop personal computer (PC), laptop personal computer (PC), netbook computer, workstation (workstation), server, PDA (personal digital assistant), PMP (player medical) ,camera Or at least one of a wearable device.
According to various embodiments, the wearable device is an accessory type (eg, watch, ring, bracelet, bracelet, necklace, eyeglass, contact lens, or head-mounted device). It may include at least one of a body type or a garment-integrated type (eg, electronic clothing), a body-attached type (eg, skin pad or tattoo), or a biological transplant type (eg, implantable circuit).

Hereinafter, a moisture recognition operation according to an embodiment of the present invention will be described as follows.
In one embodiment of the present invention, the first moisture detection circuit 120 is electrically connected to at least one pin (eg, the first pin) of the connector 110, and the first moisture detection circuit 120 is connected to the resistor from the first pin. Is detected, the first detection operation for moisture is performed.
As an example, the first moisture detection circuit 120 may include a resistor ADC (analog-to-digital converter) (not shown) that generates a digital signal based on a resistance value detected from the first pin.
The first moisture detection circuit 120 detects the presence of moisture in the connector 110 using the output from the resistor ADC, and provides the first detection result (Info_s) as the moisture recognition result.
That is, FIG. 1 shows an example in which the first detection result (Info_s) is provided to the second moisture detection circuit 130, but the first detection result (Info_s) from the first moisture detection circuit 120 is the moisture recognition result. In this case, the first detection result (Info_s) will be provided to the application processor 140 as well.

On the other hand, in another embodiment of the present invention, the moisture recognition result is also generated by combining the detection results of the first moisture detection circuit 120 and the second moisture detection circuit 130.
As an example, the first detection result (Info_s) from the first moisture detection circuit 120 is provided to the second moisture detection circuit 130, and the second moisture detection circuit 130 receives the first detection result (Info_s) from the connector 110. When the result indicates that the water content is present, the operation mode is set to the moisture detection mode, and the moisture detection operation is performed in the set moisture detection mode.

According to one embodiment, among the plurality of pins included in the connector 110, the first pin is a pin exclusively used for the moisture detection operation.
That is, the first pin is a pin unrelated to the communication between the electronic device 100 and the external device, and the first moisture detection circuit 120 does not perform an operation related to communication other than the moisture detection operation.
That is, the first pin corresponds to a dummy pin, an additional pin, or the like, and the first pin is not electrically connected to another integrated circuit related to communication in the electronic device 100.

As an example of operation, the second moisture detection circuit 130 is electrically connected to one or more pins (for example, the second pin) different from the first pin of the connector 110, and the second moisture detection circuit 130 is the second pin. The second detection operation related to whether or not moisture is present is performed by detecting the resistance.
As an example, the second pin is a pin related to communication with an external device, and the second moisture detection circuit 130 performs an operation related to communication with the external device using the second pin in the normal mode. To do.
That is, the second moisture detection circuit 130 can operate in the normal mode, the low power mode, or the moisture detection mode, depending on the first detection result (Info_s).

As an example, the second moisture detection circuit 130 receives the first detection result (Info_s) in the low power mode.
If the resistance value of the first pin varies due to the connection of a normal cable from the outside to the connector 110, the second moisture detection circuit 130 responds to the first detection result (Info_s), Operates in normal mode.
On the other hand, when the resistance value of the first pin fluctuates due to the flow of moisture into the connector 110, the second moisture detection circuit 130 operates in the moisture detection mode in response to the first detection result (Info_s). .

According to one embodiment, the plurality of pins included in the connector 110 may include pins used to identify external devices, and in the USB type-C structure, the pins used to identify external devices are , CC (configuration channel) 1 pin and CC2 pin may be included.
In addition, according to an embodiment, the second pin may include at least one of the CC1 pin and the CC2 pin, and the electronic device 100 recognizes an external device using a resistance detected from the CC1 pin and the CC2 pin. A CCIC (configuration channel integrated circuit) (not shown) may be included.
At this time, the second moisture detection circuit 130 is also included in the CCIC.

The second moisture detection circuit 130 detects resistance from the second pin, and generates a second detection result (Info_D) based on the resistance.
If the second moisture detection circuit 130 also detects that moisture exists in the connector 110, the second detection result (Info_D) corresponds to a final recognition result that recognizes that moisture exists in the connector 110.
The second detection result (Info_D) is provided to the application processor 140, and the application processor 140 performs various control operations for preventing the corrosion of the connector 110, and also indicates that the water has flowed in. Various control operations for informing the user are performed.
As an example, the application processor 140 can prevent a current from flowing through the connector 110 by controlling a power management IC (integrated circuit) (not shown), and can operate the connector 110 such as a charging operation. Can be blocked.

According to one embodiment of the present invention as described above, moisture detection can be performed using the first pin that is not related to communication with an external device.
As an example, as an existing method for recognizing the type of an external device, a method in which a micro USB integrated circuit (MUIC) detects a resistance (RID) of an identification terminal has been proposed. According to an embodiment of the present invention, The MUIC is used for the first moisture detection circuit 120. Regardless of the connection of an external cable, the resistance of the first pin used exclusively for moisture detection is detected by the MUIC as the aforementioned resistance (RID). The
That is, according to one embodiment of the present invention, the inflow of moisture into the connector 110 is recognized by the dedicated pin for detecting moisture and the dedicated integrated circuit.

According to another embodiment of the present invention, when the first detection operation result and the second detection operation result both indicate that moisture is detected, it is finally recognized that moisture exists in the connector 110.
That is, moisture recognition may be erroneously performed due to various factors such as physical damage of the connector 110. However, according to the embodiment of the present invention, moisture recognition is performed based on a combination of different detection operations. Recognition accuracy is improved.
In addition, when the first pin and the second pin correspond to pins that are physically separated from each other, if both the results of the first detection operation and the second detection operation indicate the presence of moisture, the moisture inside the connector 110 Despite not flowing in, the possibility of being mistakenly recognized as moisture inflow is greatly reduced.

FIG. 2 is a block diagram showing an embodiment of the first moisture detection circuit of FIG.
Referring to FIG. 2, the first moisture detection circuit 120 includes a resistance detector 121 and a moisture detector 122.
As an example, the first moisture detection circuit 120 is electrically connected to the first pin, and the resistance detector 121 detects a resistance from the first pin and outputs a digital signal corresponding to the detected resistance value. Includes digital converter (ADC).
That is, the resistance value of the first pin is used to detect different levels of voltage, and the analog / digital converter (ADC) outputs a digital code corresponding to the detected voltage to generate a resistance detection result. To do.
As a deformable example, the resistance detector 121 may be embodied as a circuit that provides an analog signal to the moisture detector 122 without including an ADC.

The moisture detector 122 uses the output from the resistance detector 121 to generate a first detection result (Info_s).
As an example, the resistance detector 121 can output a digital code based on the detected resistance value, and the moisture detector 122 indicates whether or not moisture has been detected based on the digital code value. 1 detection result (Info_s) is generated.
If moisture is detected, a smaller resistance value is detected from the first pin than if not, and the moisture detector 122 has a digital code value that is less than or equal to the reference value (or greater than or equal to the reference value). The first detection result (Info_s) indicating that moisture has been detected is generated.

FIG. 3A is a block diagram illustrating an embodiment of the second moisture detection circuit of FIG. 1, and FIG. 3B is a diagram for explaining the control of the operation mode of the second moisture detection circuit.
Referring to FIGS. 1 and 3A, the second moisture detection circuit 130 includes a mode controller 131, a power generator 132, a resistance detector 133, and a moisture detector 134.
As an example, the second moisture detection circuit 130 is electrically connected to the second pin, and the resistance detector 133 detects resistance from the second pin step by step and outputs information corresponding to the detected resistance step. .
That is, the resistance stage is defined as a plurality of stages (for example, Rp, Rd, Ra), and the resistance detector 133 displays information indicating any one stage according to the resistance value detected from the second pin. , Provided to the moisture detector 134.

The mode controller 131 controls the operation mode of the second moisture detection circuit 130 in response to the first detection result (Info_s).
As an example, referring to FIG. 3B, when the first detection result (Info_s) indicates that moisture is detected by the connector 110, the mode controller 131 operates the second moisture detection circuit 130 in the moisture detection mode. The control operation is performed as follows.
On the other hand, when the first detection result (Info_s) indicates that moisture is not detected by the connector 110 (or when the external cable is connected normally), the mode controller 131 A control operation is performed so that the moisture detection circuit 130 operates in the normal mode.

According to one embodiment, when the second moisture detection circuit 130 is in the low power mode state, the second moisture detection circuit 130 does not provide current to the second pin.
On the other hand, when the second moisture detection circuit 130 is in the moisture detection mode, the second moisture detection circuit 130 provides a low level current to the second pin in order to detect the resistance of the second pin.
When the second moisture detection circuit 130 is in a normal state, the second moisture detection circuit 130 provides a normal current having a relatively high level to the second pin for communication with an external device.
The mode controller 131 controls the power generator 132 according to the first detection result (Info_s), and the power generator 132 provides a current whose level is adjusted to the second pin for the moisture detection operation.

The moisture detector 134 outputs the second detection result (Info_D) based on the detection result from the resistance detector 133.
According to one embodiment, the second detection result (Info_D) corresponds to a final recognition result indicating that moisture exists in the connector 110.
According to an embodiment, the second detection information (Info_D) may include various information related to moisture inflow and moisture type (or liquid type, corrosive substance type, and the like).
As an example, various kinds of moisture such as salt water and fresh water are flowed into the connector 110, and the electric conductivity may be different depending on the kind of moisture.
At this time, the resistance values detected from the second pin are different from each other depending on the type of moisture that has flowed in, and the resistance detector 133 displays information indicating any one of a plurality of resistance stages as a moisture detector. 134.
That is, the second detection result (Info_D) from the moisture detector 134 may further include information indicating the type of moisture that has flowed in along with information indicating moisture inflow.

According to one embodiment, the second detection result (Info_D) is further provided to the mode controller 131.
For example, after the second moisture detection circuit 130 is changed to the moisture detection mode, the moisture present in the connector 110 is dried. At this time, the second detection result (Info_D) indicates that no moisture exists (or Information) indicating that the moisture has dried.
Based on the second detection result (Info_D), the mode controller 131 changes the operation mode of the second moisture detection circuit 130 from the moisture detection mode to the low power mode or changes the moisture detection mode to the normal mode. .

Hereinafter, it is assumed that the connector according to the embodiment of the present invention corresponds to the USB type-C connector structure, and a configuration and an operation example thereof will be described.
According to one embodiment, the term connector may be replaced by a receptacle. Moreover, the term of the above-mentioned pin may be replaced with a terminal.
Hereinafter, a feature of grasping moisture inflow and moisture drying by utilizing a ground (GND) terminal, a CC1 terminal, a CC2 terminal, etc. among various terminals disclosed in the USB type-C structure will be disclosed.

However, it is one embodiment and many other types of terminals can be utilized.
The terminal used in the first detection operation corresponds to a ground (GND) terminal defined as a USB type-C structure, but according to the embodiment of the present invention, the ground (GND) used for moisture detection is used. ) Terminal is irrelevant to the function of transmitting the actual ground voltage, and according to an embodiment of the present invention, the ground (GND) terminal used for moisture detection may be referred to as a RID terminal.

FIG. 4 is a connector diagram illustrating an example in which a connector of a USB type-C structure is applied to a connector according to an exemplary embodiment of the present invention.
The various terms shown in FIG. 4 are easily understood by those skilled in the art through the USB specification, and thus a specific description related thereto is omitted.
Referring to FIG. 4, pins included in the USB type-C structure connector may have a symmetric structure.
That is, due to the symmetrical structure, when the cable or gender is connected to the USB type-C connector of the electronic device, the connection is possible regardless of the directionality of the cable.
As an example, the USB cable can be connected without having to match the pin directionality of the connector.

The USB type-C structure connector includes two rows of pins.
As an example, the connector of the USB type-C structure includes a first row of pins (A1 to A12) and a second row of pins (B1 to B12).
As an example, a connector of USB type-C structure can support data communication at various speeds.
As an example, the connector of the USB type-C structure includes pins (A2, A3, A10, A11, B2, B3, B10, B11) that support high-speed data communication according to the first standard (for example, USB 3.1), Pins (A6, A7) and (B6, B7) that support low-speed data communication according to the second standard (for example, USB 2.0) are included.

  In addition, the pins in the first row (A1 to A12) and the pins in the second row (B1 to B12) perform unique functions. For example, the VBUS pins (A4, A9, B4, B9) ) Corresponds to a power supply pin, GND pins (A1, A12, B1, B12) correspond to pins that transmit a ground voltage, and SBU (sideband use) pins (A8, B8) correspond to ALT (alternate). As a pin used for mode support, it is connected to a cable equipped with Thunderbolt (registered trademark), DisplayPort, HDMI (registered trademark) or the like.

In addition, a device adopting a USB type-C structure connector can perform bidirectional communication.
As an example, when the electronic device is connected to an external device via a USB interface, the electronic device operates as a host (for example, DFP (downstream facing port)) or as a slave (UPP: upstream facing port). Can do.
Alternatively, the above-described electronic apparatus operates as a DRP (dual role port), and at this time, the electronic apparatus can adaptively change the role of the host (DFP) or the device (UFP).

The role of the electronic device as described above is also specified via the CC pins (A5, B5) of the connector of the USB type-C structure.
As an example, in the case of a USB interface, data connection and control are also performed by digital communication via CC1 / CC2 pins (A5, B5).

Depending on the model of the electronic device, only some of the pins included in the connector may be used.
That is, some pins are not used in the normal operation mode of the electronic device (as an example, a mode other than moisture detection).
As an example, some models do not utilize one or more of the GND pins (A1, A12, B1, B12).
Alternatively, some models do not use at least one of the pins (A2, A3, A10, A11, B2, B3, B10, B11) related to high-speed data communication.
Pins that are not used in the electronic device are not electrically connected to an integrated circuit (IC) in the electronic device that is involved in the communication.
According to an exemplary embodiment of the present invention, at least one of the pins not used as described above is set as the first pin in the above-described embodiment, and the first pin has a dedicated use for moisture detection. It is possible to connect a moisture detection circuit used for the above.

FIG. 5 is a diagram illustrating an example of a first pin and a second pin selected for moisture detection.
4 and 5, the electronic device 200 includes a connector 210 having a USB type-C structure, and the connector 210 includes a first row of pins (A1 to A12) and a second row of pins (B1 to B12). )including.
In addition, among the plurality of GND pins (A1, A12, B1, B12), one GND pin (for example, B12) that is not actually used is selected as the first pin, and the micro USB IC (for detecting moisture) ( MUIC) 220) is connected to the GND pin B12, and the MUIC 220 detects the resistance value (RID) from the GND pin B12.

In the first row of pins (A1 to A12) and the second row of pins (B1 to B12), one or more pins related to communication with an external device are the second pins in the above-described embodiment. FIG. 5 shows an example in which the CC1 / CC2 pins (A5, B5) are selected as the second pins.
The CCIC 230 performs data connection and control in the normal mode, detects resistance from the CC1 / CC2 pins (A5, B5) in the moisture detection mode, and determines whether or not moisture exists based on the detected resistance value. To detect.

The CCIC 230 can recognize the cable or set the host / device role by detecting the resistance from the CC1 / CC2 pins (A5, B5) in the normal mode.
As an example, the CCIC 230 detects a voltage by applying a current to the CC1 / CC2 pins (A5, B5), and obtains a voltage value having a fluctuation level based on the fluctuation of the resistance value of the CC1 / CC2 pins (A5, B5). The recognition operation and the setting operation described above can be performed by comparing with a predetermined reference voltage (for example, the first reference voltage).

In the moisture detection mode, the CCIC 230 detects a voltage by applying a current to the CC1 / CC2 pins (A5, B5), and compares it with a predetermined reference voltage (for example, the second reference voltage), Moisture can be detected.
According to one embodiment, the CCIC 230 applies a relatively low level current to the CC1 / CC2 pins (A5, B5) in the moisture detection mode compared to the normal mode.
In addition, the reference voltage set in the moisture detection mode is different in level from the first reference voltage set in the normal mode. For example, the second reference voltage has a higher level than the first reference voltage. .
The resistance value of the CC1 / CC2 pin (A5, B5) varies depending on whether or not the moisture has flowed in and the type of the flowing water (for example, salt water or fresh water), and the CCIC 230 classifies the resistance value into a plurality of stages. By detecting, it is possible to determine whether or not the moisture has flowed in and the type of the moisture that has flowed in.

According to one embodiment, the CCIC 230 can detect moisture by various methods using the CC1 / CC2 pins (A5, B5).
For example, the CCIC 230 detects resistance from each of the CC1 / CC2 pins (A5, B5), and if moisture is detected in any of the CC1 / CC2 pins (A5, B5), the result of recognition that moisture exists in the connector 210. Is generated.
Alternatively, as another example, the CCIC 230 may generate a recognition result when moisture is present in the connector 210 when moisture is detected by any one of the CC1 pin A5 and the CC2 pin B5.

FIG. 6 is a flowchart for explaining a moisture recognition method according to an embodiment of the present invention.
An example of a method for recognizing moisture and then recognizing moisture drying will be described with reference to FIG.
According to the above-described embodiment, the presence of moisture is recognized through at least two moisture detection stages, and moisture drying is recognized through at least two moisture drying detection stages in a similar manner.

As an example, when the drying of water is first detected through the resistance (RID) of the first pin (for example, the GND pin) and when it is detected that the moisture is dry, the second pin (for example, for example) , CC1 and CC2 pins) to detect moisture drying secondarily.
Further, if it is detected that the moisture is dry in both the primary detection stage and the secondary detection stage, it is finally recognized that the water flowing into the connector is dry.
According to the above-described method, it is possible to accurately determine the inflow of moisture and the drying of moisture. Since the accurate determination relating to moisture does not allow the current flow to the connector terminal, connector corrosion due to moisture can be prevented. .

As an example of operation, referring to FIG. 6, moisture is detected (RID Water?) Through the resistance (RID) from the first pin in the dry state (Drived) (step S11), and moisture is detected. For example, the operation of detecting moisture through the second pin (for example, the CC1 and CC2 pins) is performed again (CC1, CC2 Water?) (Step S12).
When moisture is detected in both the primary detection and secondary detection processes via a plurality of pins, it is recognized that moisture exists in the connector.
On the other hand, if moisture is not detected by at least one pin, it is recognized that there is no moisture.

The method of recognizing moisture drying also detects moisture drying (RID Dred?) (Step S14) through the resistance (RID) from the first pin in a state where moisture is recognized (Water), and the moisture is dried. If it is detected, the operation of detecting moisture drying is performed again via the second pin (for example, the CC1 and CC2 pins) (CC1, CC2 Dried?) (Step S13).
When moisture drying is detected in both the primary detection process and the secondary detection process, it is recognized that the moisture flowing into the connector is dried.
The results of moisture recognition and moisture drying recognition are also provided to other processors (eg, application processors) in the electronic device.

  According to the embodiment as described above, when it is not moisture, it prevents moisture misrecognition due to physical characteristics of a specific pin (for example, pin damage or pin malfunction) and is dried in a situation where moisture has flowed in. In this case, by detecting the moisture drying from the plurality of pins, the drying recognition is finally performed after the residual moisture is dried to the maximum, so that the corrosion incident due to the residual moisture can be minimized.

Also, the moisture and foreign matter that flow into the connector have different resistance value fluctuations, and when moisture flows into the connector, the components change over time, or the pins are shorted together. May be.
However, according to an embodiment of the present invention, the inflow or drying of moisture is sequentially detected for a plurality of pins, thereby improving the accuracy of the moisture recognition result, thereby stabilizing the system or the electronic device. Can be operated.

7 to 9 are flowcharts for explaining a method of performing moisture recognition and drying recognition according to an exemplary embodiment of the present invention.
In the following embodiments, the first moisture detection circuit is included in the MUIC, the second moisture detection circuit is included in the CCIC, the first pin corresponds to the GND pin, and the second pin is the CC1 / CC2 pin. Although a corresponding example is shown, the embodiment of the present invention is not limited thereto.

Referring to FIG. 7, the MUIC is electrically connected to the GND pin, and detects a resistance from the GND pin periodically or aperiodically (step S21).
Further, based on the detected resistance value, primary detection is performed as to whether or not moisture exists in the connector (step S22).
The primary detection result of moisture is provided to the CCIC, and the CCIC enters the moisture detection mode in response to the primary detection result of moisture (step S23).
In the moisture detection mode, the CCIC detects resistance from the CC1 / CC2 pin (step S24).
Based on the detected resistance value, whether or not moisture exists in the connector is secondarily detected (step S25).
Then, the electronic device including the MUIC and the CCIC finally recognizes the presence of moisture and moisture drying using the first detection result of moisture and the second detection result of moisture (step S26).
According to one embodiment, as described above, the primary detection result of moisture indicates the presence of moisture, and when the CCIC detects the presence of moisture based on the secondary detection operation of moisture, the CCIC is said to have moisture. A final recognition result indicating that is generated is generated.

Referring to FIG. 8, the MUIC performs a primary moisture detection operation, and provides the result to the CCIC (step S31).
Further, the MUIC deactivates the internal operating voltage (for example, toggling voltage) in order to cut off the internal operation in the short circuit state due to the inflowed moisture (step S32).
Next, when it is detected in the MUIC that the moisture is primarily present, the CCIC performs a secondary moisture detection operation and provides the secondary moisture detection result to the MUIC (step S33).
The MUIC determines whether or not the secondary moisture detection result is a result indicating that moisture has been detected (step S34), and if it indicates that moisture has been detected, after a predetermined delay (delay) has passed. (Step S35) In order to perform the primary moisture detection operation again, the operating voltage is activated (Step S36).
On the other hand, if the secondary moisture detection result indicates that no moisture is detected, the MUIC activates the operating voltage in order to perform the primary moisture detection operation again without delay (step) S36).

Referring to FIG. 9, the CCIC maintains the low power mode state (step S41), and the CCIC receives the primary moisture detection result from the MUIC (step S42).
Next, if the primary moisture detection result indicates that moisture is detected, the CCIC changes its mode from the moisture detection mode, and the first current is detected in order to detect the resistance of the CC1 / CC2 pin. This is provided to the CC1 / CC2 pins (step S43).
A voltage is detected by the first current and the resistance of the CC1 / CC2 pin, and the detected voltage is compared with the first reference voltage (step S44).
Then, moisture is detected based on the comparison result, thereby finally recognizing whether moisture exists in the connector (step S45).

On the other hand, in the state where the primary moisture detection result is not received from the MUIC and the low power mode is maintained, the CCIC detects the resistance fluctuation from the CC1 / CC2 pin, and based on that, the cable is normally connected to the connector. It is determined whether or not there is (step S46).
When the cable is not connected, the CCIC maintains the low power mode, while when the cable is connected, the CCIC changes its mode to the normal mode and the CC1 / CC2 pin resistance. Is detected, the second current is supplied to the CC1 / CC2 pin (step S47).
Next, the voltage is detected by the second current and the resistance of the CC1 / CC2 pin, and the detected voltage is compared with the second reference voltage (step S48).
When it is determined that the cable is connected, the data connection and data control operations are performed by the CCIC (step S49).
As in the above-described at least one embodiment, the CCIC changes the levels of various voltages and currents according to the operation mode through the power supply adjustment operation. For example, the levels of the first current and the second current are different. The levels of the first reference voltage and the second reference voltage may be different.

10 to 12 are diagrams illustrating examples of detecting moisture using various pins according to an exemplary embodiment of the present invention.
Referring to FIG. 10, the electronic apparatus 300 includes a connector 310 having a USB type-C structure, a first moisture detection circuit 320, and a second moisture detection circuit 330.

The connector 310 includes a plurality of pins. For example, the connector 310 includes a first group of pins (311_1) and a second group of pins (311_2) related to data transmission / reception.
The first group of pins (311_1) includes some of the pins (A2, A3, B10, B11) related to high-speed data communication, and the second group of pins (311_2) is used for high-speed data communication. It includes other pins (A10, A11, B2, B3) among the related pins.

The electronic device 300 does not use at least one pin of the first group of pins (311_1) and the second group of pins (311_2) in connection with data communication, and at least one pin not used for data communication includes , Connected to the first moisture detection circuit 320.
Assuming that the A2 pin (TX1 +) is set as the first pin used for moisture detection, the first moisture detection circuit 320 detects the resistance from the A2 pin (TX1 +) according to the above-described embodiment, and detects the detection. The result is provided to the second moisture detection circuit 330.
As an example, the first moisture detection circuit 320 may include a resistor ADC, and a digital code from the resistor ADC is provided to the second moisture detection circuit 330 as a detection result.
At this time, the second moisture detection circuit 330 determines the digital code from the resistor ADC, and determines whether or not moisture is detected by the first moisture detection circuit 320 via the digital code.

Alternatively, as an example that can be modified, the first moisture detection circuit 320 internally determines the digital code from the resistor ADC to determine whether moisture has been detected, and determines the determination result as the first 2 moisture detection circuit 330 can be provided.
As an example, the first moisture detection circuit 320 may provide a determination result having a logic high or logic low to the second moisture detection circuit 330.

On the other hand, as in the above-described at least one embodiment, the second moisture detection circuit 330 can use the CC1 / CC2 pins (A5, B5) as the second pins.
That is, the second moisture detection circuit 330 enters the moisture detection mode based on the detection result from the first moisture detection circuit 320, and moisture exists based on the resistance value detected from the CC1 / CC2 pins (A5, B5). Can be recognized and the result can be output.

FIG. 11 shows an example in which the second pin corresponds to a pin other than the CC1 / CC2 pin of the connector of the USB type-C structure.
The electronic device 400A includes a connector 410A having a USB type-C structure, a first moisture detection circuit 420A, and a second moisture detection circuit 430A. The first pin is connected to the GND pin B12 as in at least one embodiment described above. Applicable.
On the other hand, FIG. 11 shows an example in which the second pin corresponds to other pins included in the connector 410A in addition to the CC1 / CC2 pins (A5, B5). As an example, the SBU1 pin A8 and the SBU2 pin B8 are the first pins. An example corresponding to pin 2 is shown.

A part of the plurality of pins provided in the connector 410A is connected to the CCIC, and the SBU1 pin A8 and the SBU2 pin B8 perform a function for supporting the ALT mode in the normal mode.
The second moisture detection circuit 430A enters the moisture detection mode based on the detection result from the first moisture detection circuit 420A, and detects the presence of moisture based on the resistance detected from the SBU1 / SBU2 pins (A8, B8). And output the result.
That is, the CCIC including the second moisture detection circuit 430A performs a communication function using the SBU1 pin A8 and the SBU2 pin B8 in the normal mode, while the resistance of the SBU1 / SBU2 pins (A8, B8) in the moisture detection mode. Based on the detection, a moisture recognition operation is performed.
Similar to at least one embodiment described above, if water is detected in any of the SBU1 / SBU2 pins (A8, B8), it is recognized that water is present, or within the SBU1 / SBU2 pins (A8, B8). When moisture is detected in at least one of the above, it is recognized that moisture exists.

FIG. 12 shows an example in which the second moisture detection circuit 430A further performs a moisture detection operation using a plurality of pins.
Referring to FIG. 12, the electronic device 400B includes a USB type-C connector 410B, a first moisture detection circuit 420B, and a second moisture detection circuit 430B, and the first pin is the same as that of at least one embodiment described above. Corresponds to the GND pin B12.
Meanwhile, the second pins used for the moisture detection operation by the second moisture detection circuit 430B include CC1 / CC2 pins (A5, B5) and SBU1 / SBU2 pins (A8, B8).

In the moisture detection mode, the second moisture detection circuit 430B included in the CCIC detects the resistance from the CC1 / CC2 pins (A5, B5) and the SBU1 / SBU2 pins (A8, B8), and recognizes the moisture through them. Make a final decision.
Similar to at least one embodiment described above, if water is detected in both the CC1 / CC2 pins (A5, B5) and the SBU1 / SBU2 pins (A8, B8), it is recognized that water is present.
Alternatively, as an example of a deformable operation, when moisture is detected at least one of the CC1 / CC2 pins (A5, B5) and the SBU1 / SBU2 pins (A8, B8), it is recognized that moisture exists.
Alternatively, as a deformable operation example, when moisture is detected by a predetermined reference number of pins among the CC1 / CC2 pins (A5, B5) and the SBU1 / SBU2 pins (A8, B8), it is recognized that moisture exists. .

The combination of the first pin and the second pin applicable to the embodiment of the present invention is not necessarily limited to the examples shown in FIGS.
That is, a part of pins selected from a plurality of pins included in the connector of the USB type-C structure corresponds to the first pin, and the other part of the pins corresponds to the second pin.

FIG. 13 is a block diagram showing a modification of the configuration of the CCIC included in the electronic device according to the embodiment of the present invention.
Referring to FIG. 13, the CCIC performs various functions using a USB interface, and includes various components for performing a moisture detection operation according to an exemplary embodiment of the present invention.
As an example, the CCIC 500 includes a mode controller 510, a power regulator 520, a power generator 530, a resistance detector 540, and a moisture detector 550.

According to one embodiment, it is assumed that the moisture detector 550 outputs a final recognition result (Info_D) indicating that there is moisture in the connector.
Further, the CCIC 500 performs a moisture detection operation using the resistance value detected from the CC1 / CC2 pins.
Among the components shown in FIG. 13, the detailed description of the configuration described in the above embodiment is omitted.

The power controller 520 performs a control operation for adjusting the levels of various power sources used in the moisture detection mode and the normal mode.
As an example, the power conditioner 520 can cut off the current provided to the CC1 / CC2 pins in the low power mode.
In addition, the power regulator 520 can control the power generator 530 so that a lower level current is generated in the moisture detection mode than in the normal mode.
Also, when moisture is detected, the power generator 530 can be controlled so that the current provided to the CC1 / CC2 pins is interrupted.

More specific moisture recognition operation of the present invention will be described with reference to FIGS.
14 and 15 are flowcharts for explaining a deformable moisture recognition method according to an embodiment of the present invention.
As shown in FIG. 14, a sequential detection sequence between the resistor (or RID) ADC and the CC pin is implemented.

First, it is classified whether the resistance value detected by the resistor ADC (RID) is a one-time noise generated when the cable is inserted or a valid resistance value against moisture. In order to do this, it is assumed that the voltage (or power supply (Vbus)) is confirmed when checking each time by repeating a plurality of times (for example, 10 times).
As an example, the resistance value is detected a plurality of times periodically or aperiodically, and the voltage is also detected in the detection operation.
In this process, if it is determined that the resistance value corresponds to moisture, the CCIC mode state is set to the moisture detection mode (CC check) and the CC pin is moisture detected in order to perform a re-inspection at the CC pin. Set to usage.

At this time, CC pin settings for moisture detection are as follows.
The CCIC uses the CC1 and CC2 pins of the USB type-C connector, as in at least one embodiment described above, for detecting moisture and dryness (Water & Dry Check), and the CC pin is connected to the USB type-C. When it is located in parallel in the middle of the connector and moisture is in contact with any of the CC1 and CC2 pins, it is detected that moisture is present.

In addition, the internal digital block of the CCIC connected to the CC pin includes a comparator, and the comparator detects a voltage through the CC pin and detects three intervals (Rp / Rd / Ra) is detected.
In the case of a reference voltage value that divides the above section (for example, a reference voltage that divides Rp and Rd, a reference voltage that divides Rd and Ra), it can be changed by setting a register (register) in CCIC. It is.
As described above, for the normal operation, the first reference voltage for distinguishing Rp and Rd and the second reference voltage for distinguishing Rp and Rd when performing the moisture check may be different.

As an example, for the moisture check, the second reference voltage for distinguishing Rp and Rd is set to a value different from the normal mode (for example, a value larger than the first reference voltage).
If it is assumed that the second reference voltage corresponds to 2.75 V and a current of 1 μA is provided to the CC pin in the moisture detection mode, a relatively high moisture resistance value (2.75 MΩ × 1 μA = 2. 75V).
Various levels of the first reference voltage and the second reference voltage can be set.

Similarly to the reception of the moisture detection request, when the CCIC receives a dry detection request (Dry check) from the MUIC, the current value and the reference voltage value provided to the CC pin are set.
As an example, after receiving a dry detection request from the MUIC, the CCIC applies approximately 1 μA as a current source (Rp Src) to the CC pin.
In the case of moisture, since it has a resistance value, a voltage of V = resistance value × 1 μA is detected using the corresponding resistance value, and the state of the resistance value is determined by whether CCIC corresponds to Rp or Rd It is determined whether it falls under or not according to the set Rp / Rd threshold value.
The state of the resistance value is represented by Rp / Rd / Ra. For example, when the voltage value is 2.75 V or more, it is represented by Rp.
Finally, when the resistance value state is detected as Rp, the CCIC determines that the moisture has dried, and the CCIC provides the result of detecting the moisture drying to the MUIC or other configuration in the system. (E.g., application processor).

The function of each block shown in FIG. 14 will be described as follows.
First, an operation for determining whether or not the resistance value Adc of the RID has changed in step S54 (Adc change?) Will be described.
If the resistance value is changed, it is determined whether or not the current MUIC is in a moisture state (a state having moisture) (step S55 (Water = true?)). In order to confirm whether or not the device enters the moisture state, the operation of refreshing and judging the ADC is repeated a plurality of times (for example, 10 times) (step S56 (ADC refresh)).
If it is determined that ADC fluctuation has occurred through a plurality of determination operations, the ground voltage is transmitted or the power supply voltage (VBUS) is transmitted through the GND pin actually used for communication. By determining whether the cable is connected (step S57 (Adc = 0 (Gnd) or VBUS?)), It is determined whether or not the cable is normally connected (step S58 (Plug attach)).

On the other hand, when the resistance value Adc of the RID fluctuates, if it is determined that the current MUIC is in a moisture state, an operation for determining that the moisture is dry (dry state) is executed.
As an example, it is determined whether or not the Adc value corresponds to an open state corresponding to moisture drying (step S51 (Adc = Open?)). For the determination operation of 10 times, an ADC refresh operation (step S52 (ADC refresh)) and an operation of determining whether or not the Adc value corresponds to an open state (step S53 (Adc = Open?)) Are performed. Iterate.
Then, if it is detected that the moisture is dry by the repeated determination as described above, it is finally recognized that the moisture is dry (step S64 (Water dry)).

On the other hand, if it is determined in step S57 described above that the cable is not normally connected, a detection result indicating that the MUIC has primarily detected moisture is provided to the CCIC. The operation for moisture detection is executed.
As an example, the CCIC enters a mode for moisture detection (step S59 (CC pin detection mode)), and according to at least one embodiment described above, the CCIC detects a resistance stage via CC1 / CC2. (Step S60 (CC monitor Rd / Ra?)) If the resistance is Rd, Ra, it is determined that moisture has been sensed.

In step S60, if moisture is detected, the current applied to the CC pin is discharged, the notification operation indicating moisture detection is processed (step S62 (CC pin 0 μA, Water noti)), and there is moisture in the connector. Then, a final determination is made (step S63 (Water Detect)).
On the other hand, when it is determined that it is not Rd or Ra (when it is detected that it is not moisture), a plurality of determination operations (for example, 5 times) are further executed (step S61 (Retry)), If detected, the operation of step S62 is executed as described above, and if no moisture is detected, a result indicating that no moisture is detected is notified by the MUIC.

FIG. 15 is a flowchart for explaining a deformable moisture recognition method according to an embodiment of the present invention. In particular, FIG. 15 is a flowchart for explaining an operation method for each moisture recognition and for each dry recognition.
Referring to the moisture recognition flow in FIG. 15 (left side [Water]), it is determined whether or not a change in RID has occurred (step S71 (RID Attach?)), And if it has been determined, the RID ADC value is determined. Is less than or equal to a predetermined reference value (or set value) (step S72 (RID ADC <Ref?)).

If it is determined that the reference value is not more than the reference value, there is a possibility that moisture has flowed into the connector, so that the MUIC changes to the RID disabled state for detection via the CC pin (step S73 (RID disable, * CC Chck)).
Then, through the detection via the CC pin, it is determined whether or not moisture is detected also in the CC check (step S74 (CC = IRp?)).
If the resistance is Rd, Ra (or not Rp), it detects that moisture is present.

If moisture is detected via CC check, the voltage is controlled so that the operating voltage (V_RID) does not toggle and is maintained at 0V or a very low value in MUIC to disable RID operation. (Step S75 (V_RID Set)).
In addition, after a predetermined delay (delay) (step S76 (Delay)), the RID check is further performed to execute moisture detection again (step S77 (RID Rescan: Refresh)).
Through the above steps, moisture recognition is finally determined, and the MUIC and CCIC maintain the moisture state (Water_idle).

On the other hand, referring to the moisture drying flow (right [Dry]), it is determined whether or not there is a change in the RID value (step S81 (RID detect?)), And whether or not the RID ADC value corresponds to a predetermined reference value. (Step S82 (RID ADC = Ref?)).
The predetermined reference value corresponds to an open value corresponding to the fact that moisture has dried, and when the above criteria are satisfied, the CCIC enters the CC check mode in order to detect moisture drying via the CCIC. (Step S83 (* CC Check)).
Through the CC check, the resistance state of the CC1 / CC2 pin is determined (step S84 (CC = Rp?)). If the resistance state corresponds to Rp, it is determined that the moisture has dried (step S85). (Dried (Idle, No Water))).

  On the other hand, when the resistance state does not correspond to Rp, it is determined that the moisture is not dry, and thus the operation of discharging the current applied to CC1 / CC2 and the RID disable operation are executed (step S86 ( CC 0 μA, RID disable)), and after a predetermined delay (delay) (step S87 (Delay)), by providing the result to the MUIC, the operation of detecting moisture drying by the MUIC is executed again.

The system to which the embodiment of the present invention as described above is applied can be applied to various systems.
As an example, in the USB type-C system, the system of the present invention is a system that uses the CC pin and an additional pin capable of detecting resistance together to accurately determine moisture.
In addition to the above features, the system of the present invention is a system that uses a power supply voltage (VBUS) and a plurality of detection methods in order to distinguish a noise signal of a cable with a resistance sensing pin.
In addition to the above features, the system of the present invention can first detect moisture firstly through the resistance sensing pin, and based on that, the CC pin can be set for moisture recognition without normal operation. It is also a system that operates sequentially.
In addition to the above features, the system of the present invention changes the level of the detection current and measures the voltage formed by the resistance for resistance detection via the CC pin, and in three modes of Rp / Rd / Ra. It is also a system for judging moisture.

  In addition, according to the above-described embodiment of the present invention, the CC1 / CC2 pins are not affected by the normal operation such as USB PD (USB power delivery) or DRP (dual roll power), which is the original purpose. Because it can be operated for detection purposes, it is relatively easy to detect whether moisture is present even in a CCIC that does not have its own processor or real-time system. it can.

In addition, according to the above-described embodiment of the present invention, before performing the state determination for the CC operation, the determination of water inflow is first made through the RID, and depending on the detection result, the CCIC may not operate in the normal mode. When no current is applied to the CC pin, and there is moisture inflow, the current flow that can cause connector end corrosion can be blocked in advance.
In addition, when moisture flows in, when the connector is tilted or not parallel, or even when the entire USB type-C connector is not completely dried, moisture is dried only near the pin at a specific position. However, according to the embodiment of the present invention, since the moisture is detected by further using the CC pin located at the center of the connector, the accuracy is improved. .

  The present invention is not limited to the embodiment described above. Various modifications can be made without departing from the technical scope of the present invention.

  The electronic device including the moisture recognition function, the moisture recognition method thereof, and the moisture recognition system according to the present invention can be suitably used for all electronic devices having a connector, for example.

DESCRIPTION OF SYMBOLS 100 Electronic device 110 Connector 120 1st moisture detection circuit 121 Resistance detector 122 Moisture detector 130 2nd moisture detection circuit 131 Mode controller 132 Power supply generator 133 Resistance detector 134 Moisture detector 140 Application processor 200, 300, 400A, 400B electronic device 210, 310, 410A, 410B connector 220 MUIC (micro USBIC)
230, 500 CCIC (Configuration Channel IC)
320, 420A, 420B First moisture detection circuit 330, 430A, 430B Second moisture detection circuit 510 Mode controller 520 Power supply regulator 530 Power supply generator 540 Resistance detector 550 Moisture detector

Claims (25)

An electronic device,
A connector connected to an external cable and including a plurality of pins;
A first moisture detection circuit connected to one or more first pins of the plurality of pins and generating a first detection result based on a resistance detected from the first pin;
When connected to one or more second pins of the plurality of pins and the first detection result indicates that moisture is present in the first pin, the moisture detection mode is entered, and the second pin And a second moisture detection circuit that generates a second detection result based on the resistance detected from the first and a second moisture detection circuit that detects whether moisture exists in the connector based on the second detection result. An electronic device characterized by that.   An application processor for receiving a moisture recognition result indicating that moisture exists in the connector from at least one of the first moisture detection circuit and the second moisture detection circuit. The electronic device according to 1.   The electronic device according to claim 2, wherein the second moisture detection circuit provides the moisture recognition result to the application processor when the second detection result indicates that moisture exists in the connector. apparatus. The second moisture detection circuit provides the second detection result to the first moisture detection circuit when the second detection result indicates that moisture exists in the connector;
The first moisture detection circuit provides the moisture recognition result to the application processor when both the first detection result and the second detection result indicate that moisture exists in the connector. The electronic device according to claim 2. The first pin corresponds to a pin used exclusively for detecting the moisture,
The second pin corresponds to a pin that communicates with the external cable,
The electronic device includes an integrated circuit in which the second moisture detection circuit is disposed, and the integrated circuit enters a normal mode when the first detection result indicates that no moisture is present. The electronic device according to claim 1.   The electronic device according to claim 5, wherein the connector is a USB (Universal Serial Bus) type C connector.   The electronic device according to claim 6, wherein the first pin is one of a plurality of ground pins defined by the USB type C interface.   The first moisture detection circuit is a micro USB integrated circuit including a resistor ADC (analog-to-digital converter) that converts a resistance value detected from the first pin into a digital value and outputs the digital value. The electronic device according to claim 7.   The electronic device of claim 6, wherein the second pin includes at least one of a CC (configuration channel) 1 pin and a CC2 pin defined by the USB type C interface.   10. The electronic integrated circuit of claim 9, wherein the integrated circuit is a CC integrated circuit that performs data connection and control through at least one of the CC1 pin and the CC2 pin in the normal mode. apparatus.   The said second pin includes at least one of a CC1 pin, a CC2 pin, an SBU (sideband use) 1 pin and an SBU2 pin defined by the USB type C interface. Electronic devices. A method for recognizing moisture in an electronic device,
Generating a first detection result based on a resistance value detected from a first pin of a connector including a plurality of pins by a first integrated circuit;
When the first detection result indicates that moisture exists in the connector, the second integrated circuit generates a second detection result based on a resistance value detected from the second pin of the connector;
Generating a first recognition result indicating the presence of moisture in the connector when both the first detection result and the second detection result indicate that moisture is present. Moisture recognition method for electronic devices.   The method of claim 12, further comprising: providing the first recognition result to an application processor in the electronic device. The first integrated circuit is a dedicated circuit for detecting the presence of moisture from the first pin,
When the first detection result indicates that moisture exists, the second integrated circuit enters the moisture detection mode, performs the second detection, and indicates that the first detection result does not contain moisture. The method of claim 12, further comprising: entering a normal mode to control communication via the second pin.   The method according to claim 14, wherein the connector is a USB (Universal Serial Bus) type C connector.   The method of claim 15, wherein the first pin is one of a plurality of ground pins defined by the USB type C interface.   16. The moisture recognition of an electronic device according to claim 15, wherein the second pin includes at least one of a CC (configuration channel) 1 pin and a CC2 pin defined by the USB type C interface. Method.   At least one of the step of generating the first detection result and the step of generating the second detection result is that moisture is present when moisture is detected through a plurality of detection operations. 13. The method of recognizing moisture in an electronic device according to claim 12, wherein the detection result is generated. Generating a third detection result by the first integrated circuit based on a resistance value detected from the first pin, indicating whether moisture in the connector is dry;
If the third detection result indicates that the moisture is dry by the second integrated circuit, it indicates whether the moisture of the connector is dry based on the resistance value detected from the second pin. Generating a fourth detection result;
A step of generating a second recognition result indicating that the moisture is dry when both the third detection result and the fourth detection result indicate that the moisture is dry; The method for recognizing moisture in an electronic device according to claim 12.   At least one of the step of generating the third detection result and the step of generating the fourth detection result is that the moisture is dry when moisture drying is detected through a plurality of detection operations. 20. The method of recognizing moisture in an electronic device according to claim 19, wherein a detection result indicating that the electronic device is detected is generated. In the moisture recognition system,
A CC integrated circuit connected to the CC (configuration channel) 1 pin and CC 2 pin of the connector defined by the USB type C interface;
The CC integrated circuit receives a first moisture detection result via the first pin of the connector from the outside, and enters a moisture detection mode based on the first moisture detection result,
In the moisture detection mode, the moisture recognition system detects whether moisture exists in the connector through the second pin of the connector.   When the CC integrated circuit indicates that the first moisture detection result has detected moisture, and the moisture is present in the connector via the second pin, the connector has moisture. The moisture recognition system according to claim 21, wherein a second moisture detection result indicating the presence is output to the outside.   The micro USB integrated circuit according to claim 21, further comprising a micro USB integrated circuit that generates the first moisture detection result based on a resistance value detected from the first pin and provides the first moisture detection result to the CC integrated circuit. Moisture recognition system. The first pin is one of a plurality of ground pins defined by the USB type C interface.
The moisture recognition system according to claim 23, wherein the second pin includes at least one of a CC (configuration channel) 1 pin and a CC2 pin defined by the USB type C interface. The CC integrated circuit applies a first level current for moisture detection to the second pin when the first moisture detection result indicates that moisture is detected;
The second level current for communication via the second pin is applied to the second pin when the first moisture detection result indicates that no moisture is detected. The moisture recognition system according to 21.

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