CN104714915A - Electronic device using universal serial bus socket for firmware loading and its firmware loading method - Google Patents

Abstract

The invention provides an electronic device for loading firmware by using a universal serial bus socket and a firmware loading method thereof. The electronic device comprises a universal sequence bus socket, a functional chip and a switch element, wherein the switch element is connected with a bus data transmission pin of the universal sequence bus socket and a chip data transmission pin of the functional chip, when the identification pin of the universal sequence bus socket is provided with high level voltage, the switch element is turned on, so that the bus data transmission pin is electrically connected with the chip data transmission pin, and therefore firmware data can be transmitted from the universal sequence bus socket into the functional chip. The invention can be used as an interface for charging and an interface for loading and updating firmware.

Description

Electronic device using universal serial bus socket for firmware loading and its firmware loading method

technical field

The invention relates to an electronic device, in particular to an electronic device using a Universal Serial Bus (USB) socket for firmware loading and a firmware loading method thereof.

Background technique

With the development of information, portable electronic devices are becoming more and more popular, and because the computer system has a huge multimedia processing function, many portable electronic devices can be directly connected to the computer system to perform various data transmission actions. Among them, the general sequence The bus (USB) interface is one of the most commonly used connection interfaces between portable electronic devices and computer systems, because the USB interface has many advantages such as plug and play, hot plug, and fast data transmission speed. item advantage.

Moreover, the USB interface also has the function of transmitting current, so the computer system can provide power to the portable electronic device, so that the portable electronic device can obtain the power required for operation, or charge the battery in the portable electronic device action. In particular, the USB interface of some portable electronic devices is only designed to receive external power supply, and does not have the function of data transmission with the computer system.

In detail, please refer to FIG. 1 , which is a schematic block diagram of a conventional electronic device capable of performing data transmission with a computer system. The electronic device 1A includes a USB socket 11A, a functional chip 12A, a charging chip 13, and a battery 14 connected to the charging chip 13, and the functional chip 12A has firmware for performing specific functions. For example, when the electronic device 1A is a portable In the case of a hard disk, the function chip 12A is responsible for performing data transmission, data storage and data extraction; and the function chip 12A has a first device identification pin 123 and a second device identification pin 124, and the USB socket 11A has a Power supply pin 111, D-pin 112, D+ pin 113, ID pin 114 and ground source pin 115; wherein, the ground source pin 115 of the universal serial bus socket 11A is used for grounding, and the ground source pin 115 of the universal serial bus socket 11A The power supply pin 111 is connected to the charging chip 13, the D-pin 112 and the D+ pin 113 of the USB socket 11A are respectively connected to the first device identification pin 123 and the second device identification pin 124 of the function chip 12A, and The ID pin 114 is floating or grounded as appropriate. For example, when the USB socket 11A is an OTG (On-The-Go) specification, the ID pin 114 is grounded; otherwise, the ID pin 114 is floating.

Moreover, when the electronic device 1A is connected to the computer system 2 through the USB 3, that is, when the plugs 31 and 32 at both ends of the USB 3 are inserted into the USB socket 11A of the electronic device 1A and the socket of the computer system 2 respectively. When the USB socket 21 is used, the current provided by the computer system 2 can be transmitted to the charging chip 13 after sequentially passing through the USB 3 and the power pin 111 of the USB socket 11A, thereby charging the battery 14; generally For example, when the Universal Serial Bus interface is a USB2.0 interface, the computer system 2 can provide the electronic device 1A with a current of about 500 milliamperes (mA), and when the Universal Serial Bus interface is a USB3.0 interface, the computer system 2 can The electronic device 1A can provide a current of about 900 milliamps (mA).

At the same time, the computer system 2 will output a query message S2 and transmit it to the function chip 12A after sequentially passing through the USB 3, the D-pin 112 of the USB socket 11A and the first device identification pin 123 of the function chip 12A. , and the functional chip 12A will then output the reply message S1 corresponding to the inquiry message S2 and pass through the second device identification pin 124 of the functional chip 12A, the D+ pin 113 of the USB socket 11A and the USB 3 in sequence. Afterwards, it is transmitted to the computer system 2; wherein, through the communication program between the above-mentioned computer system 2 and the functional chip 12A, the computer system 2 can identify the specification of the electronic device 1A, such as the high-speed electronic device 1A or the low-speed electronic device 1A, etc., and then Perform subsequent data transfer operations.

Please refer to FIG. 2 , which is a schematic block diagram of a conventional electronic device that does not have the function of data transmission with a computer system. The electronic device 1B shown in FIG. 2 is roughly similar to the one shown in FIG. 1 , and will not be repeated here. The difference is that the D+ pin 113 and the D- pin 112 of the USB socket 11B are in a floating connection. status, and the function chip 12B does not have the first device identification pin and the second device identification pin; therefore, the electronic device 1B shown in FIG. electronic device 1B, but does not have the function of data transmission with the computer system 2.

Next, the firmware loading method of the known electronic device will be described. Please refer to FIG. 3 , which is a schematic diagram of firmware loading of a conventional electronic device. The electronic device 1C shown in FIG. 3 is roughly similar to those shown in FIG. 1 and FIG. Two chip data transmission pins 122; generally speaking, the first chip data transmission pins 121 and the second chip data transmission pins 122 belong to the pins of an internal integrated circuit (Inter-Integrated Circuit, I ² C) interface, such as The first chip data transmission pin 121 and the second chip data transmission pin 122 are serial data (SDA) pin and serial clock pulse (SCL) pin respectively, or the first chip data transmission pin 121 and the second chip data transmission pin 121 The two chip data transmission pins 122 belong to the pins of a Universal Asynchronous Receiver/Transmitter (UART) interface, such as the first chip data transmission pin 121 and the second chip data transmission pin 122 are receiving interfaces respectively Pin (Rx) and launch pin (Tx).

Wherein, when the research and development personnel of the electronic device 1C want to input the firmware into the functional chip 12C or update the firmware in the functional chip 12C, the external fixture board 4 storing the firmware is connected to the first part of the functional chip 12C through the wire 41. The data transmission pin 121 of the first chip and the data transmission pin 122 of the second chip, in this way, the firmware in the external fixture board 4 can be transmitted into the functional chip 12C. However, the procedure for loading the above-mentioned firmware is quite cumbersome, and the wire 41 needs to be soldered between the functional chip 12C and the external fixture board, which is really inconvenient for the R&D personnel at the R&D end. In addition, if the developer develops a newer version of firmware after the electronic device 1C is commercialized, the purchased user cannot update the firmware of the electronic device 1C by himself.

Therefore, the known electronic devices have room for improvement.

Contents of the invention

Aiming at the problems existing in the prior art, the main purpose of the present invention is to provide an electronic device using a Universal Serial Bus (USB) socket for firmware loading and a firmware loading method thereof, so as to simplify the firmware loading by developers and users. Programs for electronic devices.

In a preferred embodiment, the present invention provides an electronic device using a Universal Serial Bus (USB) socket for firmware loading, including:

A universal serial bus socket, including an identification pin and a first bus data transmission pin;

A functional chip, used to perform a function, and includes a first chip data transmission pin; and

a first switch element connected between the identification pin, the first bus data transmission pin and the first chip data transmission pin;

Wherein, when the voltage of the identification pin is a low-level voltage, the first switch element is turned off, so as to disconnect the first bus data transmission pin and the first chip data transmission pin; And when the voltage of the identification pin is a high level voltage, the first switching element is triggered to be turned on, so as to conduct the first bus data transmission pin and the first chip data transmission pin.

In a preferred embodiment, the present invention also provides a firmware loading method of an electronic device, for inputting a firmware data into a functional chip of an electronic device, and the electronic device includes a Universal Serial Bus (USB ) socket, wherein the firmware loading method of the electronic device includes:

(a) Provide a high-level voltage to an identification pin of the universal serial bus socket to turn on a first bus data transmission pin connected to the universal serial bus socket and a first chip data of the functional chip a first switching element between the transmission pins, so as to conduct between the first bus data transmission pin and the first chip data transmission pin; and

(b) The firmware data is transmitted into the function chip after sequentially passing through the first bus data transmission pin and the first chip data transmission pin.

The beneficial effect of the present invention is that, the electronic device of the present invention that uses the universal serial bus (USB) socket to carry out firmware loading only needs to connect the electronic device and the external fixture board that stores the firmware through the universal serial bus, the firmware can be input To the function chip of the electronic device or to update the firmware in the function chip; to modify the circuit connection relationship between the first bus data transmission pin, the second bus data transmission pin, the identification pin and the function chip of the electronic device Design, so that the universal serial bus socket of the electronic device can be used not only as an interface for charging, but also as an interface for loading and updating firmware; use the voltage level of the identification pin to judge the first bus data A basis for whether the transmission pin is connected to the first chip data transmission pin of the functional chip, and a basis for whether the second bus data transmission pin is connected to the second chip data transmission pin of the functional chip.

Description of drawings

FIG. 1 is a schematic block diagram of a conventional electronic device capable of data transmission with a computer system.

FIG. 2 is a schematic block diagram of a conventional electronic device that does not have the function of data transmission with a computer system.

FIG. 3 is a schematic diagram of firmware loading of a conventional electronic device.

FIG. 4 is a schematic block diagram of an electronic device using a USB socket for firmware loading according to the present invention.

FIG. 5 : is a schematic diagram of the electronic device shown in FIG. 4 connected to the power supply device.

FIG. 6 is a partial schematic diagram of a firmware loading circuit of the electronic device shown in FIG. 4 .

FIG. 7 is a circuit schematic diagram of another part of the firmware loading circuit of the electronic device shown in FIG. 4 .

FIG. 8 is a method flow chart of a preferred embodiment of a firmware loading method of an electronic device according to the present invention.

FIG. 9 is a schematic diagram of loading firmware into a functional chip of an electronic device by applying the method shown in FIG. 8 .

FIG. 10 is a flow chart of another preferred embodiment of the method for loading firmware of an electronic device according to the present invention.

Wherein, the reference signs are explained as follows:

1A electronic device 1B electronic device

1C electronic device 2computer system

3 Universal Serial Bus 4 External Fixture Board

5 Electronics 6 Power Supply

7 Universal Serial Bus 8 External Fixture Board

11A Universal Serial Bus socket 11B Universal Serial Bus socket

12A function chip 12B function chip

12C function chip 13 charging chip

14 battery 21 universal serial bus socket

31 Plug for Universal Serial Bus 32 Plug for Universal Serial Bus

41 wires 51 universal serial bus socket

52 function chip 53 charging chip

54 battery 55 firmware loading circuit

61 Universal Serial Bus socket 71 Universal Serial Bus plug

72 Universal Serial Bus plug 81 Universal Serial Bus socket

82 switch buttons 111 power supply pins

112D-pin 113D+pin

114 ID pin 115 ground source pin

121 Data transmission pin of the first chip 122 Data transmission pin of the second chip

123 First device identification pin 124 Second device identification pin

511 power supply pin 512 first bus data transmission pin

513 second bus data transmission pin

514 identification pin 515 ground source pin

521 first chip data transmission pin

522 second chip data transmission pin

5511 transistor 5512 transistor

5521 Transistor 5522 Transistor

P1 step P2 step

P step S1 inquiry information

S2 reply message S3 firmware data

S4 inquiry information S5 reply information

R0 resistor R1 resistor

R2 resistor R3 resistor

R4 resistor R5 resistor

R6 resistor R7 resistor

R8 resistor R9 resistor

Detailed ways

Please refer to FIG. 4 , which is a schematic block diagram of an electronic device for loading firmware through a USB socket according to the present invention. The electronic device 5 includes a USB socket 51, a functional chip 52, a charging chip 53, a battery 54 connected to the charging chip 53 and a firmware loading circuit 55 connected between the USB socket 51 and the functional chip 52, and the functional chip There is firmware in 52, which is used to execute specific functions. For example, when the electronic device 5 is a wireless charging device, the functional chip 52 is responsible for the work of wireless charging; and the functional chip 52 has a first chip data transmission pin 521 and a second Two chip data transmission pins 522, and the universal serial bus socket 51 has a power supply pin 511, a first bus data transmission pin 512, a second bus data transmission pin 513, an identification pin 514 and a ground source connection for grounding Foot 515.

In this preferred embodiment, the USB socket 51 is a Micro USB socket (micro USB socket), and the identification pin 514, the first bus data transmission pin 512 and the second bus data transmission pin 513 are respectively ID pin, D-pin and D+ pin, and the first chip data transmission pin 521 and the second chip data transmission pin 522 belong to the pins of a Universal Asynchronous Receiver/Transmitter (UART) interface , such as the first chip data transmission pin 521 and the second chip data transmission pin 522 are the receiving pin (Rx) and the transmitting pin (Tx) respectively, but not limited to the above, those skilled in the art can For example, the design can be changed so that the data transmission pin 521 of the first chip and the data transmission pin 522 of the second chip belong to an internal integrated circuit (Inter-Integrated Circuit, I ² C ) interface pins, such as the first chip data transmission pin 521 and the second chip data transmission pin 522 are serial data (SDA) pins and serial clock pulse (SCL) pins respectively.

Please refer to FIG. 5 , which is a schematic diagram of the electronic device shown in FIG. 4 connected to the power supply device 6 . There is electric power in the power supply device 6, such as a computer system or a portable power supply device, etc., but not limited thereto, and the power supply device 6 has a universal serial bus socket 61; wherein, when the electronic device 5 passes through the universal serial bus When the line 7 is connected to the power supply device 6, that is, when the plugs 71 and 72 at both ends of the USB 7 are respectively plugged into the USB socket 51 of the electronic device 5 and the USB socket 61 of the power supply device 6, the power supply The current provided by the supply device 6 can be transmitted to the charging chip 53 via the power pin 511 of the USB socket 51, and then the battery 54 can be charged; generally speaking, when the USB2.0 interface is used, the power supply The supply device 6 can provide the electronic device 5 with a current of about 500 milliamps (mA), and when the USB3.0 interface is used, the power supply device 6 can provide the electronic device 5 with a current of about 900 milliamperes (mA). .

Please refer to FIG. 6 and FIG. 7 , FIG. 6 is a schematic diagram of a part of the firmware loading circuit shown in FIG. 4 , and FIG. 7 is a schematic diagram of another part of the firmware loading circuit shown in FIG. 4 . The firmware loading circuit 55 includes a first switch element 551, a second switch element 552 and a plurality of resistors R0-R9, and the first switch element 551 is connected to the identification pin 514, the first bus data transmission pin 512, the first chip between the data transmission pin 521 and the power supply pin 511, and the second switch element 552 is connected between the identification pin 514, the second bus data transmission pin 513, the second chip data transmission pin 522 and the power supply pin 511 ; Wherein, when the voltage of the identification pin 514 is a low level voltage, the first switch element 551 and the second switch element 552 are in the off state, that is, the first bus data transmission pin 512 and the second bus data transmission interface The pins 513 are all in a floating state or in a grounded state to disconnect the first bus data transmission pin 512 from the first chip data transmission pin 521, and to make the second bus data transmission pin 513 and the first chip data transmission pin 513 disconnect The data transmission pins 522 of the two chips are disconnected; and when the voltage of the identification pin 514 is a high-level voltage, the first switching element 551 and the second switching element 552 are triggered to be turned on to enable the first bus data transmission Conduction between the pin 512 and the first chip data transmission pin 521, and conduction between the second bus data transmission pin 513 and the second chip data transmission pin 522; in this preferred embodiment, the first A switch element 551 is composed of a transistor 5511 and a transistor 5512, and a second switch element 552 is composed of a transistor 5521 and a transistor 5522, but not limited to the above.

Next, the firmware loading method of the electronic device of the present invention will be described. Please refer to FIG. 8 , which is a flow chart of a method for loading firmware of an electronic device in a preferred embodiment of the present invention. The firmware loading method of the electronic device includes:

Step P1: Provide a high-level voltage to the identification pin 514 of the USB socket 51 to turn on the first switch element 551 and the second switch element 552, thereby making the first bus data transmission pin 512 and the first chip conduction between the data transmission pins 521, and conduction between the second bus data transmission pin 513 and the second chip data transmission pin 522; and

Step P2: The firmware data is transmitted into the functional chip 52 through the first bus data transmission pin 512 and the first chip data transmission pin 521 in sequence.

In detail, please refer to FIG. 9 , which is a schematic diagram of applying the method shown in FIG. 8 to load the firmware into the functional chip of the electronic device. The external fixture board 8 (that is, an electronic device) stores the firmware data required by the electronic device 5, and has a universal serial bus socket 81 and a switch button 82. When the developer or user of the electronic device 5 wants to input the firmware to the When the functional chip 52 or the firmware in the functional chip 52 are to be updated, first plug the plugs 71 and 72 at both ends of the universal serial bus 7 into the universal serial bus socket 51 of the electronic device 5 and the universal socket of the external fixture board 8 respectively. The serial bus socket 81 is used to connect the electronic device 5 with the external fixture board 8 .

Furthermore, the developer or user can trigger the switch button 82 to make the external fixture board 8 provide a high-level voltage, so that the high-level voltage is transmitted to the identification pin 514 of the USB socket 51 through the USB 7, so that As a result, the first switch element 551 and the second switch element 552 can be triggered to turn on, thereby making conduction between the first bus data transmission pin 512 and the first chip data transmission pin 521, and making the second bus data transmission pin 512 conductive. Conduction between the transmission pin 513 and the second chip data transmission pin 522, which is step P1 as described in FIG. 8; When it is turned on, the firmware data S3 stored in the external fixture board 8 can be transmitted into the function chip 52 after sequentially passing through the universal serial bus 7, the first bus data transmission pin 512 and the first chip data transmission pin 521, as shown in FIG. Step P2 described in FIG. 8 .

It is supplemented that, since the electronic device 5 shown in FIG. 9 is in the process of loading firmware, the second bus data transmission pin 513 and the second chip data transmission pin 522 are not used, so the method shown in FIG. 8 The design of step P1 can be simplified as follows: when the identification pin 514 of the USB socket 51 is provided with a high-level voltage, only the first switching element 551 is turned on; furthermore, the electronic device 5 shown in FIG. 4 is also The design can be simplified as the second switch element 552 is not included, and the second bus data transmission pin 513 is only in a floating state or a ground state, and is not connected to the second chip data transmission pin 522 .

Please refer to FIG. 10 , which is a flow chart of another preferred embodiment of a firmware loading method of an electronic device according to the present invention. The method shown in FIG. 10 is roughly similar to that described in FIG. 8 , and will not be repeated here. The difference is that the method shown in FIG. 10 further includes a step P between step P1 and step P2:

The query information S4 output by the external fixture board 8 is transmitted into the function chip 52 through the universal serial bus 7, the first bus data transmission pin 512 and the first chip data transmission pin 521 in sequence; wherein, if the function chip 52 receives The query message S4 is followed by a reply message S5, so that the reply message S5 is transmitted back to the external fixture after sequentially passing through the second chip data transmission pin 522, the second bus data transmission pin 513 and the universal serial bus line 7. When the board is selected, step P2 is executed.

According to the above description, it can be seen that as long as the developer or user connects the electronic device 5 and the external fixture board 8 storing the firmware through the universal serial bus 7, the firmware can be input to the function chip 52 of the electronic device 5 or to the The firmware in the function chip 52 is updated, which solves the cumbersome procedures in the prior art that the research and development personnel or users must first solder the wires between the function chip and the external fixture board, etc., which is an invention with great industrial applicability .

In addition, it should be noted that, as can be seen from the description of Fig. 2 and Fig. 3 in the prior art, the USB socket 11B of the electronic device 1C is only used as an interface for charging, so the first bus data transmission of the USB socket 11B The pin 112, the second bus data transmission pin 113 and the identification pin 114 are originally three pins with no function; The circuit connection relationship between the transmission pin 513, the identification pin 514 and the function chip 52 is designed, so that the USB socket 51 of the electronic device 5 can be used not only as a charging interface, but also as a firmware loading with an updated interface.

Furthermore, from the description of FIG. 1 in the prior art, it can be seen that when the electronic device 1A is connected to the computer system 2 through the universal serial bus line 3, the computer system 2 will first communicate with the functional chip 12A to further identify the electronic device. The specifications of the device 1A, however, because the first bus data transmission pin 512 of the USB socket 51 of the electronic device 5 of the present invention is not connected to the first device identification pin of the functional chip 52, and the first USB socket 51 of the present invention The second bus data transmission pin 513 is not the second device identification pin connected to the functional chip 52, and even the functional chip 52 of the electronic device 5 of the present invention does not have the first device identification pin and the second device identification pin, so If the electronic device 5 is connected to the computer system, the first bus data transmission pin 512 and the second bus data transmission pin 513 of the universal serial bus socket 51 are not in a floating state or in a grounded state, a misjudgment by the computer system will occur If the electronic device 5 is an "unrecognizable device", the computer system cannot charge the electronic device 5 .

Therefore, in order to avoid the occurrence of the above-mentioned situation, the present invention uses the voltage level of the identification pin 514 as a function of judging whether the first bus data transmission pin 512 and the first chip data transmission pin 521 of the functional chip 52 The basis of conducting, and as the basis of conducting whether the second bus data transmission pin 513 and the second chip data transmission pin 522 of the functional chip 52; that is to say, when the electronic device 5 is connected through the universal serial bus When the computer system is charging, since the voltage of the identification pin 514 of the Universal Serial Bus is a low-level voltage at this time, the first bus data transmission pin 512 and the second bus data transmission pin of the Universal Serial Bus socket 51 513 is floating or grounded, so the computer system can charge the electronic device 5 smoothly; and when the electronic device 5 is connected to the external fixture board 8 through the universal serial bus 7 to load firmware, due to the external fixture board 8 will provide a high-level voltage to the identification pin 514 of the universal serial bus, so the first bus data transmission pin 512 and the first chip data transmission pin 521 of the function chip 52 will be turned on, and the second bus data transmission The pin 513 is connected to the second chip data transmission pin 522 of the functional chip 52 , so the firmware data in the external fixture board 8 can be transmitted into the functional chip 52 .

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the claims of the present invention. Therefore, all other equivalent changes or modifications that do not deviate from the spirit disclosed in the present invention should be included in the scope of this case. within the claims.

Claims (19)

1. An electronic device for loading firmware using a USB socket, comprising: A universal serial bus socket, including an identification pin and a first bus data transmission pin; A functional chip, used to perform a function, and includes a first chip data transmission pin; and a first switch element connected between the identification pin, the first bus data transmission pin and the first chip data transmission pin; Wherein, when the voltage of the identification pin is a low-level voltage, the first switch element is turned off, so as to disconnect the first bus data transmission pin and the first chip data transmission pin; And when the voltage of the identification pin is a high level voltage, the first switching element is triggered to be turned on, so as to conduct the first bus data transmission pin and the first chip data transmission pin. 2. The electronic device using a USB socket for firmware loading as claimed in claim 1, wherein the USB socket and the functional chip further include a second bus data transmission pin and a second chip data transmission pin respectively. Pin, and the electronic device also includes a second switch element connected between the identification pin, the second bus data transmission pin and the second chip data transmission pin; wherein, when the voltage of the identification pin When it is a low-level voltage, the second switch element is in a closed state to disconnect the second bus data transmission pin and the second chip data transmission pin; and when the voltage of the identification pin is When the voltage is at a high level, the second switching element is triggered to be turned on, so as to conduct the connection between the second bus data transmission pin and the second chip data transmission pin. 3. The electronic device for loading firmware using a USB socket as claimed in claim 2, wherein the second switching element is composed of at least one transistor. 4. The electronic device using a USB socket for firmware loading as claimed in claim 2, wherein the data transmission pin of the first chip and the data transmission pin of the second chip belong to an internal integrated circuit interface or belong to a common Asynchronous transceiver transmission interface. 5. The electronic device using a USB socket for firmware loading as claimed in claim 2, wherein an inquiry message output by another electronic device sequentially passes through the first bus data transmission pin and the first The chip data transmission pin is then transmitted to the functional chip, and a reply message output by the functional chip is sequentially transmitted to the other electronic device through the second chip data transmission pin and the second bus data transmission pin . 6. The electronic device using a USB socket for firmware loading as claimed in claim 2, wherein the USB socket is a micro-USB socket, and the identification pin, the first bus data transmission pin and the The second bus data transmission pins are respectively an ID pin, a D- pin and a D+ pin. 7. The electronic device for loading firmware using a Universal Serial Bus socket as claimed in claim 1, wherein when the voltage of the identification pin is the low level voltage, the first bus data transmission pin is in a floating state state or a grounded state. 8. The electronic device for loading firmware using a USB socket as claimed in claim 1, wherein the first switching element is composed of at least one transistor. 9. The electronic device using a USB socket for firmware loading as claimed in claim 1, wherein a firmware data output by another electronic device sequentially passes through the first bus data transmission pin and the first The chip data transmission pin is then transmitted to the functional chip. 10. The electronic device using USB socket for firmware loading as claimed in claim 9, wherein the other electronic device is a computer device or an external fixture board. 11. The electronic device for loading firmware using a USB socket as claimed in claim 2, further comprising a charging chip and a battery connected to the charging chip, and the charging chip is used to perform a charging function; wherein, The USB socket also includes a power pin, and the power pin is connected to the charging chip. 12. A firmware loading method of an electronic device, used to input a firmware data into a functional chip of an electronic device, and the electronic device includes a USB socket, wherein the firmware loading method of the electronic device includes : (a) Provide a high-level voltage to an identification pin of the universal serial bus socket to turn on a first bus data transmission pin connected to the universal serial bus socket and a first chip data of the functional chip a first switching element between the transmission pins, so as to conduct between the first bus data transmission pin and the first chip data transmission pin; and (b) The firmware data is transmitted into the function chip after sequentially passing through the first bus data transmission pin and the first chip data transmission pin. 13. The firmware loading method of an electronic device as claimed in claim 12, wherein when the identification pin of the USB socket is provided with the high level voltage, a second bus connected to the USB socket A second switch element between the data transmission pin and a second chip data transmission pin of the functional chip is triggered to open, so that the second bus data transmission pin and the second chip data transmission pin conduction. 14. The firmware loading method of an electronic device as claimed in claim 13, wherein the firmware data comes from another electronic device, and between the step (a) and the step (b), further comprising: Make an inquiry message of the other electronic device transmit into the function chip after sequentially passing through the first bus data transmission pin and the first chip data transmission pin; wherein, when the function chip receives the inquiry information Step (b) is executed when the reply information is outputted so that the reply information is transmitted to the other electronic device via the second chip data transmission pin and the second bus data transmission pin in sequence. 15. The firmware loading method of an electronic device as claimed in claim 14, wherein the other electronic device is a computer device or an external fixture board. 16. The firmware loading method of an electronic device as claimed in claim 13, wherein both the first switch element and the second switch element are composed of at least one transistor. 17. The firmware loading method of an electronic device as claimed in claim 13, wherein the first chip data transmission pin and the second chip data transmission pin belong to an internal integrated circuit interface or belong to a general asynchronous transceiver transmission interface . 18. The firmware loading method of an electronic device as claimed in claim 13, wherein the USB socket is a micro-USB socket, and the identification pin, the first bus data transmission pin and the second bus data transmission pin The pins are respectively an ID pin, a D- pin and a D+ pin. 19. The firmware loading method of an electronic device as claimed in claim 12, wherein when the voltage of the identification pin is a low level voltage, the first bus data transmission pin is in a floating state or is in a grounding state state.