Device for motherboard and board reuse, electronic product, and communication equipment

Abstract

The present invention discloses a device, electronic product and communication equipment for reusing motherboards and boards, and relates to the field of electronics. The device includes: a first resistor, a second resistor, a first interface, a second interface and a third interface; the first interface is connected to the first resistor, the second resistor and the third interface in sequence, and the second interface is connected between the first resistor and the second resistor; the first interface, the second interface and the third interface are connected to the motherboard and board. The number of ports of the end motherboard and board used by the device of this solution is very small, and the difficulty added to the hardware design is also very small. The same board and card can be reused to the greatest extent through the device of this solution, and the number of software maintenance and hardware maintenance can be reduced. At the same time, the types of boards produced are effectively reduced, and the number of boards in after-sales stock is reduced, thereby saving costs and reducing overall operating costs.

Description

Technical Field

[0001] The present invention relates to the field of electronic products, and in particular to a device for multiplexing mainboards and boards, electronic products and communication equipment. Background Art

[0002] All electronic products or home appliances encounter the same problem. For example, home appliances often share a common design, but with minor ID changes or functional adjustments, a series of product models are derived. The existing solution is to fine-tune the function by creating a new motherboard to accommodate the fine-tuning, or to create a new motherboard to accommodate the new product type. Each fine-tuning of the function or change in product type requires adjustments to the motherboard design or changes to the materials on the motherboard. Motherboard design is complex and time-consuming. Furthermore, due to the need to produce the motherboard multiple times for minor adjustments, subsequent software and hardware maintenance requires significant resources, significantly increasing the overall operating costs of the product series. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a device, an electronic product and a communication device for multiplexing a mainboard and a board in view of the deficiencies in the prior art.

[0004] The technical solution of the present invention to solve the above technical problems is as follows:

[0005] A device for mainboard and board multiplexing, comprising: a first resistor, a second resistor, a first interface, a second interface, and a third interface;

[0006] The first interface is connected to the first resistor, the second resistor, and the third interface in sequence, and the second interface is connected between the first resistor and the second resistor; wherein the resistance values ​​of the first resistor and the second resistor are determined according to the type of the external product;

[0007] The first interface, the second interface and the third interface are connected to the mainboard card;

[0008] The main board is used to determine the type of the external product according to the ratio of the resistance value of the first resistor to the resistance value of the second resistor.

[0009] The beneficial effects of the present invention are: this solution is connected to the first resistor, the second resistor and the third interface in sequence through the first interface, and the second interface is connected between the first resistor and the second resistor; wherein, the resistance value of the first resistor and the resistance value of the second resistor are confirmed according to the type of the external product; the first interface, the second interface and the third interface are connected to the mainboard card; the number of ports of the end mainboard card used by the device of this solution is very small, and the difficulty added to the hardware design is also very small. The same board card is reused to the greatest extent through the device of this solution, and the number of software maintenance and hardware maintenance can be reduced. At the same time, the types of boards produced are effectively reduced, and the number of boards in after-sales stock is reduced, thereby saving costs and reducing overall operating costs.

[0010] Further, the resistance of the first resistor is 0KΩ, and the resistance of the second resistor is 100KΩ;

[0011] Or, the resistance of the first resistor is 91KΩ, and the resistance of the second resistor is 8.2KΩ;

[0012] Or, the resistance of the first resistor is 82KΩ, and the resistance of the second resistor is 16KΩ;

[0013] Or, the resistance of the first resistor is 75KΩ, and the resistance of the second resistor is 24KΩ;

[0014] Or, the resistance of the first resistor is 68KΩ, and the resistance of the second resistor is 33KΩ;

[0015] Or, the resistance of the first resistor is 56KΩ, and the resistance of the second resistor is 39KΩ;

[0016] Or, the resistance of the first resistor is 47KΩ, and the resistance of the second resistor is 47KΩ;

[0017] Or, the resistance of the first resistor is 39KΩ, and the resistance of the second resistor is 56KΩ;

[0018] Or, the resistance of the first resistor is 33KΩ, and the resistance of the second resistor is 68KΩ;

[0019] Or, the resistance of the first resistor is 24KΩ, and the resistance of the second resistor is 75KΩ;

[0020] Or, the resistance of the first resistor is 16KΩ, and the resistance of the second resistor is 82KΩ;

[0021] Or, the resistance of the first resistor is 8.2KΩ, and the resistance of the second resistor is 91KΩ;

[0022] Alternatively, the resistance of the first resistor is 100KΩ, and the resistance of the second resistor is 0KΩ.

[0023] The beneficial effect of adopting this further solution is that, by connecting the device corresponding to each resistor set to the motherboard, the corresponding product type is connected. Based on the value of each resistor set, the motherboard can determine the corresponding product type. This does not require major modifications to the motherboard hardware or software, and uses very few motherboard port resources. This solution also maximizes reuse when different motherboards need to be reused on different products.

[0024] Furthermore, the first interface is specifically used to connect to the power supply terminal of the mainboard card;

[0025] The second interface is specifically used to connect to the resistance value acquisition terminal of the main board;

[0026] The third interface is specifically used to connect to the ground terminal of the mainboard card.

[0027] The beneficial effect of adopting the above further scheme is: when the device of this scheme is connected to the corresponding mainboard card, the mainboard identifies the type of connected product based on the resistance ratio of the connected device, and changes the behavior mode of the mainboard card itself according to the product type to realize resource reuse within the mainboard card.

[0028] Furthermore, the second interface is specifically used to connect to the AD converter of the mainboard card.

[0029] The beneficial effect of adopting the above further scheme is: this scheme collects the voltage value of the second resistor in the device through the AD converter, determines the resistance relationship between the first resistor and the second resistor based on the voltage value, and then transmits the resistance relationship to the main control chip of the main board card. The main control chip determines what product corresponds to the resistance relationship.

[0030] Furthermore, the AD converter includes ADS7830, AD9609 or an AD converter included in the main control chip in the main board.

[0031] Another technical solution of the present invention to solve the above technical problems is as follows:

[0032] An electronic product comprises: the mainboard card, a device for mainboard card reuse as in any of the above solutions connected to the mainboard card, and a board-to-board connector for connection.

[0033] The beneficial effects of the present invention are: the device for motherboard board reuse of this scheme is connected to the first resistor, the second resistor and the third interface in sequence through the first interface, and the second interface is connected between the first resistor and the second resistor; wherein, the resistance value of the first resistor and the resistance value of the second resistor are confirmed according to the type of the external product; the first interface, the second interface and the third interface are connected to the motherboard board; the number of ports of the end motherboard board used by the device of this scheme is very small, and the difficulty added to the hardware design is also very small. The same board is reused to the greatest extent through the device of this scheme, and the number of software maintenance and hardware maintenance can be reduced. At the same time, the types of boards produced are effectively reduced, and the number of boards in after-sales stock is reduced, thereby saving costs and reducing overall operating costs.

[0034] Another technical solution of the present invention to solve the above technical problems is as follows:

[0035] A refrigerator comprises: the mainboard board, a device for mainboard board multiplexing as in any of the above solutions connected to the mainboard board, and a board-to-board connector for connection.

[0036] The beneficial effects of the present invention are: the device for motherboard board reuse of this scheme is connected to the first resistor, the second resistor and the third interface in sequence through the first interface, and the second interface is connected between the first resistor and the second resistor; wherein, the resistance value of the first resistor and the resistance value of the second resistor are confirmed according to the type of the external product; the first interface, the second interface and the third interface are connected to the motherboard board; the number of ports of the end motherboard board used by the device of this scheme is very small, and the difficulty added to the hardware design is also very small. The same board is reused to the greatest extent through the device of this scheme, and the number of software maintenance and hardware maintenance can be reduced. At the same time, the types of boards produced are effectively reduced, and the number of boards in after-sales stock is reduced, thereby saving costs and reducing overall operating costs.

[0037] Another technical solution of the present invention to solve the above technical problems is as follows:

[0038] A washing machine comprises: the mainboard card, a device for mainboard card reuse as in any of the above solutions connected to the mainboard card, and a board-to-board connector for connection.

[0039] The beneficial effects of the present invention are: the device for motherboard board reuse of this scheme is connected to the first resistor, the second resistor and the third interface in sequence through the first interface, and the second interface is connected between the first resistor and the second resistor; wherein, the resistance value of the first resistor and the resistance value of the second resistor are confirmed according to the type of the external product; the first interface, the second interface and the third interface are connected to the motherboard board; the number of ports of the end motherboard board used by the device of this scheme is very small, and the difficulty added to the hardware design is also very small. The same board is reused to the greatest extent through the device of this scheme, and the number of software maintenance and hardware maintenance can be reduced. At the same time, the types of boards produced are effectively reduced, and the number of boards in after-sales stock is reduced, thereby saving costs and reducing overall operating costs.

[0040] Another technical solution of the present invention to solve the above technical problems is as follows:

[0041] A communication device comprises: the mainboard card, a device for mainboard card multiplexing as in any of the above solutions connected to the mainboard card, and a board-to-board connector for connection.

[0042] The beneficial effects of the present invention are: the device for motherboard board reuse of this scheme is connected to the first resistor, the second resistor and the third interface in sequence through the first interface, and the second interface is connected between the first resistor and the second resistor; wherein, the resistance value of the first resistor and the resistance value of the second resistor are confirmed according to the type of the external product; the first interface, the second interface and the third interface are connected to the motherboard board; the number of ports of the end motherboard board used by the device of this scheme is very small, and the difficulty added to the hardware design is also very small. The same board is reused to the greatest extent through the device of this scheme, and the number of software maintenance and hardware maintenance can be reduced. At the same time, the types of boards produced are effectively reduced, and the number of boards in after-sales stock is reduced, thereby saving costs and reducing overall operating costs.

[0043] Advantages of additional aspects of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 A structural block diagram of a device for mainboard and board multiplexing provided by an embodiment of the present invention;

[0045] Figure 2 A circuit structure diagram of a device for mainboard and card multiplexing provided in another embodiment of the present invention;

[0046] Figure 3Schematic diagram of the relationship between the product ID and the values ​​of the first resistor and the second resistor provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0047] The principles and features of the present invention are described below with reference to the accompanying drawings. The embodiments given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0048] like Figure 1 As shown, a device for mainboard and board multiplexing provided by an embodiment of the present invention includes: a first resistor 11, a second resistor 12, a first interface 13, a second interface 14 and a third interface 15;

[0049] The first interface 13 is connected to the first resistor 11, the second resistor 12, and the third interface 15 in sequence, and the second interface 14 is connected between the first resistor 11 and the second resistor 12. The resistance values ​​of the first resistor 11 and the second resistor 12 are determined according to the type of the external product.

[0050] The first interface 13, the second interface 14 and the third interface 15 are connected to the mainboard card;

[0051] The main board card is used to determine the type of the external product according to the ratio of the resistance value of the first resistor 11 to the resistance value of the second resistor 12 .

[0052] In one embodiment, if Figure 2 As shown, the device for motherboard and board multiplexing may include: a resistor R397 with a resistance of 82KΩ and an accuracy of 1%, which is equivalent to the first resistor 11; a resistor R15 with a resistance of 16KΩ and an accuracy of 1%, which is equivalent to the second resistor 12; the power supply terminal VDDAO_1.8V is connected to R397, R15 and the ground terminal SARADC_GND in sequence, and HW_ID1 is connected between R397 and R15 for collecting the voltage value of R15. HW_ID1, i.e., the second interface 14, is the voltage collection terminal of the AD converter; the power supply terminal VDDAO_1.8V is the first interface 13, and the ground terminal SARADC_GND is the third interface 15.

[0053] In one embodiment, if Figure 3As shown, HW_ID represents the product model, pull-up represents the resistance value of the first resistor 11, pull-down represents the resistance value of the second resistor 12, and ADC value represents the value of the AD converter at the current resistance value. Only 13 types of circuit resistance values ​​are listed here. If the precision of the AD converter actually used is high enough, the resistance can be distributed more finely, and circuits with 16 resistance values ​​can be formed, which can be used to identify 16 types of products. It should be noted that when the precision of the AD converter is actually high enough, more groups of resistance ratios can be identified. Therefore, there is no need to specifically limit it to only 16 groups, and there can be more groups. What is protected here is that the AD converter can identify the resistance ratio of the first resistor and the second resistor, and does not specifically limit the resistance values ​​of the first resistor and the second resistor.

[0054] It should be noted that the actual application of the device of this solution can be when a new type of product needs to be connected to the mainboard and the software needs to distinguish the product according to its own characteristics, such as changes in the user interface or changes in the definition of certain hardware port functions. In this case, some information needs to be given to the software layer to identify the current product type. When the new type of product is connected, the device of this solution is also connected. The mainboard collects the resistance information from the device. Based on the resistance information, the product ID of the new type can be determined, and the product type can be obtained, and the corresponding software processing can be performed. Each device corresponds to a group of resistors, representing a product model; 16 groups of resistors can make 16 devices, identifying 16 types of products. The specific product model represented by each group can be set according to actual application requirements.

[0055] Prior to this, an interface for connecting to the device of this solution needs to be reserved on the mainboard card. It can be set to a fixed standard 3-pin or 4-pin board-to-board connector. The specific number of pins can be determined based on actual conditions. It only needs to be able to connect the mainboard card with the device of this solution and ensure that the circuit path is normal. The number of pins is not specifically limited.

[0056] This solution is connected to the first resistor 11, the second resistor 12 and the third interface 15 in sequence through the first interface 13, and the second interface 14 is connected between the first resistor 11 and the second resistor 12; wherein, the resistance value of the first resistor 11 and the resistance value of the second resistor 12 are determined according to the type of the external product; the first interface 13, the second interface 14 and the third interface 15 are connected to the main board card; the number of ports of the end main board card used by the device of this solution is very small, and the difficulty added to the hardware design is also very small. The same board card is reused to the greatest extent through the device of this solution, and the number of software maintenance and hardware maintenance can be reduced. At the same time, the types of boards produced are effectively reduced, and the number of boards in after-sales stock is reduced, thereby saving costs and reducing overall operating costs.

[0057] Preferably, in any of the above embodiments, the resistance of the first resistor 11 is 0 kΩ, and the resistance of the second resistor 12 is 100 kΩ. It should be noted that the first resistor can also be NC, i.e., infinite resistance, because the AD converter detects not the resistances of the two resistors, but the ratio of the two. NC represents infinity and is also identifiable, so the first resistor can be either 0 ohm or NC.

[0058] Alternatively, the resistance of the first resistor 11 is 91KΩ, and the resistance of the second resistor 12 is 8.2KΩ;

[0059] Alternatively, the resistance of the first resistor 11 is 82KΩ, and the resistance of the second resistor 12 is 16KΩ;

[0060] Alternatively, the resistance of the first resistor 11 is 75KΩ, and the resistance of the second resistor 12 is 24KΩ;

[0061] Alternatively, the resistance of the first resistor 11 is 68KΩ, and the resistance of the second resistor 12 is 33KΩ;

[0062] Alternatively, the resistance of the first resistor 11 is 56KΩ, and the resistance of the second resistor 12 is 39KΩ;

[0063] Alternatively, the resistance of the first resistor 11 is 47KΩ, and the resistance of the second resistor 12 is 47KΩ;

[0064] Alternatively, the resistance of the first resistor 11 is 39KΩ, and the resistance of the second resistor 12 is 56KΩ;

[0065] Alternatively, the resistance of the first resistor 11 is 33KΩ, and the resistance of the second resistor 12 is 68KΩ;

[0066] Alternatively, the resistance of the first resistor 11 is 24KΩ, and the resistance of the second resistor 12 is 75KΩ;

[0067] Alternatively, the resistance of the first resistor 11 is 16KΩ, and the resistance of the second resistor 12 is 82KΩ;

[0068] Alternatively, the resistance of the first resistor 11 is 8.2KΩ, and the resistance of the second resistor 12 is 91KΩ;

[0069] Alternatively, the resistance of first resistor 11 is 100 kΩ, and the resistance of second resistor 12 is 0 kΩ. It should be noted that the second resistor can also be NC, meaning infinite resistance, because the AD converter detects the ratio of the two resistors, not their values. NC represents infinity and is also recognized, so either 0 ohm or NC is acceptable.

[0070] This solution connects the device corresponding to each resistor set to the motherboard, representing the corresponding product type. Based on the resistance value of each set, the motherboard can determine the corresponding product type. This solution does not require major modifications to the motherboard hardware or software, and uses very few motherboard port resources. This solution also maximizes the reuse of different motherboards and cards when they need to be used on different products.

[0071] Preferably, in any of the above embodiments, the first interface 13 is specifically used to connect to the power supply terminal of the mainboard card;

[0072] The second interface 14 is specifically used to connect to the resistance value acquisition terminal of the main board;

[0073] The third interface 15 is specifically used to connect to the ground terminal of the mainboard card.

[0074] Connect the device of this solution to the corresponding mainboard card. The mainboard identifies the type of connected product based on the resistance value of the connected device and implements resource reuse within the mainboard card based on the type of product.

[0075] Preferably, in any of the above embodiments, the second interface 14 is specifically used to connect to an AD converter of a mainboard card.

[0076] This solution uses an AD converter to collect the voltage value of the second resistor 12 in the device, determines the resistance relationship between the first resistor 11 and the second resistor 12 based on the voltage value, and then transmits the resistance relationship to the main control chip of the main board card. The main control chip determines what product it corresponds to based on the resistance relationship.

[0077] Preferably, in any of the above embodiments, the AD converter includes an ADS7830, an AD9609, or an AD converter built into the main control chip of the motherboard. It should be noted that the external AD converter may be TI's ADS7830 or Analog's AD9609, and the built-in AD converter may be a main control chip with a built-in AD converter. The main control chip can be a commonly available commercially available one, selected based on actual application needs, and is not specifically limited.

[0078] In one embodiment, an electronic product includes: a mainboard card, a device for mainboard card reuse as in any of the above embodiments connected to the mainboard card, and a board-to-board connector for connection.

[0079] The device for reusing the mainboard and board cards of the present solution is connected to the first resistor 11, the second resistor 12 and the third interface 15 in sequence through the first interface 13, and the second interface 14 is connected between the first resistor 11 and the second resistor 12; wherein, the resistance value of the first resistor 11 and the resistance value of the second resistor 12 are determined according to the type of the external product; the first interface 13, the second interface 14 and the third interface 15 are connected to the mainboard and board cards; the number of ports of the end mainboard and board cards used by the device of the present solution is very small, and the difficulty added to the hardware design is also very small. The same board and card are reused to the greatest extent through the device of the present solution, and the number of software maintenance and hardware maintenance can be reduced. At the same time, the types of boards produced are effectively reduced, and the number of boards in after-sales stock is reduced, thereby saving costs and reducing overall operating costs.

[0080] In one embodiment, a refrigerator includes: a mainboard board, a device for mainboard board multiplexing as in any of the above embodiments connected to the mainboard board, and a board-to-board connector for connection.

[0081] The device for reusing the mainboard and board cards of the present solution is connected to the first resistor 11, the second resistor 12 and the third interface 15 in sequence through the first interface 13, and the second interface 14 is connected between the first resistor 11 and the second resistor 12; wherein, the resistance value of the first resistor 11 and the resistance value of the second resistor 12 are determined according to the type of the external product; the first interface 13, the second interface 14 and the third interface 15 are connected to the mainboard and board cards; the number of ports of the end mainboard and board cards used by the device of the present solution is very small, and the difficulty added to the hardware design is also very small. The same board and card are reused to the greatest extent through the device of the present solution, and the number of software maintenance and hardware maintenance can be reduced. At the same time, the types of boards produced are effectively reduced, and the number of boards in after-sales stock is reduced, thereby saving costs and reducing overall operating costs.

[0082] In one embodiment, a washing machine includes: a mainboard card, a device for mainboard card multiplexing as in any of the above embodiments connected to the mainboard card, and a board-to-board connector for connection.

[0083] The device for reusing the mainboard and board cards of the present solution is connected to the first resistor 11, the second resistor 12 and the third interface 15 in sequence through the first interface 13, and the second interface 14 is connected between the first resistor 11 and the second resistor 12; wherein, the resistance value of the first resistor 11 and the resistance value of the second resistor 12 are determined according to the type of the external product; the first interface 13, the second interface 14 and the third interface 15 are connected to the mainboard and board cards; the number of ports of the end mainboard and board cards used by the device of the present solution is very small, and the difficulty added to the hardware design is also very small. The same board and card are reused to the greatest extent through the device of the present solution, and the number of software maintenance and hardware maintenance can be reduced. At the same time, the types of boards produced are effectively reduced, and the number of boards in after-sales stock is reduced, thereby saving costs and reducing overall operating costs.

[0084] In one embodiment, a communication device includes: a mainboard card, a device for mainboard card multiplexing as in any of the above embodiments connected to the mainboard card, and a board-to-board connector for connection.

[0085] The device for reusing the mainboard and board cards of the present solution is connected to the first resistor 11, the second resistor 12 and the third interface 15 in sequence through the first interface 13, and the second interface 14 is connected between the first resistor 11 and the second resistor 12; wherein, the resistance value of the first resistor 11 and the resistance value of the second resistor 12 are determined according to the type of the external product; the first interface 13, the second interface 14 and the third interface 15 are connected to the mainboard and board cards; the number of ports of the end mainboard and board cards used by the device of the present solution is very small, and the difficulty added to the hardware design is also very small. The same board and card are reused to the greatest extent through the device of the present solution, and the number of software maintenance and hardware maintenance can be reduced. At the same time, the types of boards produced are effectively reduced, and the number of boards in after-sales stock is reduced, thereby saving costs and reducing overall operating costs.

[0086] It can be understood that in some embodiments, some or all of the optional implementation methods in the above embodiments may be included.

[0087] It should be noted that the above embodiments are product embodiments corresponding to the previous method embodiments. For the description of the optional implementation methods in the product embodiments, please refer to the corresponding description in the above method embodiments, which will not be repeated here.

[0088] The reader should understand that in the description of this specification, reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0089] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of units is merely a logical functional division. In actual implementation, other division methods may be used, such as combining or integrating multiple units or components into another system, or ignoring or not implementing certain features.

[0090] Units described as separate components may or may not be physically separate, and components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected based on actual needs to achieve the objectives of the embodiments of the present invention.

[0091] In addition, the functional units in the various embodiments of the present invention may be integrated into a single processing unit, each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0092] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the various embodiments of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, and other media that can store program code.

[0093] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and such modifications or substitutions are intended to be within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. A device for motherboard and board reuse, characterized in that: include: A first resistor, a second resistor, a first interface, a second interface, and a third interface; The first interface is connected to the first resistor, the second resistor, and the third interface in sequence, and the second interface is connected between the first resistor and the second resistor; wherein the resistance values ​​of the first resistor and the second resistor are determined according to the type of the external product; The first interface, the second interface and the third interface are connected to the mainboard card; The mainboard card is used to determine the type of the external product according to the ratio of the resistance value of the first resistor to the resistance value of the second resistor; The first interface is specifically used to connect to the power supply terminal of the mainboard card; The second interface is specifically used to connect to the resistance value acquisition terminal of the main board; The third interface is specifically used to connect to the ground terminal of the mainboard card; The second interface is specifically used to connect to the AD converter of the mainboard card.

2. The device for mainboard and board reuse according to claim 1, characterized in that: The resistance of the first resistor is 0KΩ, and the resistance of the second resistor is 100KΩ; Or, the resistance of the first resistor is 91KΩ, and the resistance of the second resistor is 8.2KΩ; Or, the resistance of the first resistor is 82KΩ, and the resistance of the second resistor is 16KΩ; Or, the resistance of the first resistor is 75KΩ, and the resistance of the second resistor is 24KΩ; Or, the resistance of the first resistor is 68KΩ, and the resistance of the second resistor is 33KΩ; Or, the resistance of the first resistor is 56KΩ, and the resistance of the second resistor is 39KΩ; Or, the resistance of the first resistor is 47KΩ, and the resistance of the second resistor is 47KΩ; Or, the resistance of the first resistor is 39KΩ, and the resistance of the second resistor is 56KΩ; Or, the resistance of the first resistor is 33KΩ, and the resistance of the second resistor is 68KΩ; Or, the resistance of the first resistor is 24KΩ, and the resistance of the second resistor is 75KΩ; Or, the resistance of the first resistor is 16KΩ, and the resistance of the second resistor is 82KΩ; Or, the resistance of the first resistor is 8.2KΩ, and the resistance of the second resistor is 91KΩ; Alternatively, the resistance of the first resistor is 100KΩ, and the resistance of the second resistor is 0KΩ.

3. The device for mainboard and board reuse according to claim 1, characterized in that: The AD converter includes ADS7830, AD9609 or the AD converter of the main control chip in the main board.

4. An electronic product, characterized in that: include: The mainboard card, a device for mainboard card multiplexing according to any one of claims 1 to 3 connected to the mainboard card, and a board-to-board connector for connection.

5. A refrigerator, characterized in that: include: The mainboard card, and a device for mainboard card multiplexing according to any one of claims 1 to 3, and a board-to-board connector for connection connected to the mainboard card.

6. A washing machine, characterized in that: include: The mainboard card, and a device for mainboard card multiplexing according to any one of claims 1 to 3, and a board-to-board connector for connection connected to the mainboard card.

7. A communication device, characterized in that: include: The mainboard card, and a device for mainboard card multiplexing according to any one of claims 1 to 3, and a board-to-board connector for connection connected to the mainboard card.

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