Authentication device, switching device and adapter

Abstract

The present application provides an authentication device, a switching device and an adapter, which relate to the field of circuits. The authentication device includes: a coprocessor and a charging interface; the charging interface is connected to one end of the coprocessor, and the other end of the coprocessor is used to connect to the lightning interface of an external switching device; the charging interface is used to connect the charging cable to obtain the parameter information of the charging cable, and send the parameter information to the coprocessor; the coprocessor is used to authenticate the parameter information, generate authentication information after the authentication is passed, and send the authentication information to the lightning interface. After the lightning interface receives the authentication information, the fast charging mode can be turned on, so as to quickly charge the device connected to the lightning interface. In addition, the switching device provided in the present application allows the use of general chip development, which can make the switching device smaller in size, lower in cost, and more versatile, which is conducive to improving the user experience.

Description

Technical Field

[0001] The present application relates to the field of circuits, and in particular to an authentication device, a switching device and an adapter. Background Art

[0002] With the development of technology, audio playback devices are becoming more and more popular. In order to reduce the number of external interfaces, some existing audio playback devices usually only have one Lightning interface, which can be used to charge the device and transmit the audio signal to the headset.

[0003] When a user needs to transfer the audio signal of the audio player device to the earphone while charging the audio player device, an adapter is usually used to achieve this. The adapter includes a lightning interface, a charging interface, and a headphone interface. When in use, the lightning interface of the adapter is connected to the lightning interface of the audio player device, the charging interface is connected to the power supply through the charging cable, and the headphone interface is connected to the earphone, so that the audio signal of the audio player device can be transferred to the earphone while charging the audio player device.

[0004] However, existing adapters only support the normal charging mode of the Lightning interface, which has a slow charging speed. On the other hand, they are large in size, high in cost, and have poor versatility, and the user experience is relatively general. Summary of the invention

[0005] The purpose of this application includes, for example, providing an authentication device, a switching device and an adapter, which can support the fast charging mode of the lightning interface, and at the same time have a small size, low cost, good versatility, and are conducive to improving the user experience.

[0006] The embodiments of the present application can be implemented as follows:

[0007] In a first aspect, the present application provides an authentication device, the authentication device comprising: a coprocessor and a charging interface;

[0008] The charging interface is connected to one end of the coprocessor, and the other end of the coprocessor is used to connect to the lightning interface of the external adapter;

[0009] The charging interface is used to connect the charging cable to obtain parameter information of the charging cable and send the parameter information to the coprocessor;

[0010] The coprocessor is used to authenticate the parameter information, generate authentication pass information after the authentication is successful, and send the authentication pass information to the lightning interface.

[0011] Optionally, in a specific implementation, the coprocessor includes: a coprocessor chip and a first resistor, and the coprocessor chip includes: a first pin, a second pin, a third pin, and a fourth pin;

[0012] The first pin and the second pin are connected to the charging interface respectively, the third pin is grounded, and the fourth pin is used to connect to the lightning interface;

[0013] The second pin is also connected to the lightning interface through a first resistor.

[0014] Optionally, in a specific implementation, the charging interface is also used to connect to the lightning interface; the charging interface includes: a charging module, the charging module includes: a fifth pin, a sixth pin, a seventh pin and an eighth pin;

[0015] The fifth pin is grounded, the sixth pin and the eighth pin are respectively connected to one end of the coprocessor, and the seventh pin is used to connect to the lightning interface.

[0016] In a second aspect, the present application provides a switching device, the switching device comprising: an audio interface, a lightning interface, and an audio processing module;

[0017] The audio processing module is connected to the audio interface and the lightning interface respectively;

[0018] The audio interface is used to transmit audio signals; the lightning interface is used to transmit audio signals and / or charging current, and, when receiving an authentication pass message sent by the authentication device, start the first charging mode;

[0019] The audio processing module is used to obtain a digital audio signal through the lightning interface, process the digital audio signal to obtain an analog audio signal, and transmit the analog audio signal to the audio interface.

[0020] Optionally, in a specific implementation, the switching device further includes an audio verification module;

[0021] The audio verification module is connected to the lightning interface;

[0022] The audio verification module is used to obtain the device information of the device connected to the audio interface through the lightning interface.

[0023] Optionally, in a specific implementation, the audio processing module includes a power management submodule and a conversion submodule;

[0024] The power management submodule is connected to the lightning interface and the conversion submodule respectively;

[0025] The conversion submodule is also connected to the lightning interface and the audio interface respectively;

[0026] The power management submodule is used to obtain the power supply current through the lightning interface and supply power to the conversion submodule according to the power supply current;

[0027] The conversion submodule is used to obtain a digital audio signal through the lightning interface, process the digital audio signal to obtain an analog audio signal, and transmit the analog audio signal to the audio interface.

[0028] Optionally, in a specific implementation, the conversion submodule includes a first conversion interface, a first conversion chip and a second conversion chip;

[0029] The first conversion interface is connected to the first conversion chip and the lightning interface respectively;

[0030] The first conversion chip is also connected to the second conversion chip and the power management submodule respectively;

[0031] The second conversion chip is also connected to the power management submodule and the audio interface respectively;

[0032] The first conversion interface is used to obtain the digital audio signal through the lightning interface, perform level conversion on the digital audio signal, and transmit the converted digital audio signal to the first conversion chip;

[0033] The first conversion chip is used to receive the converted digital audio signal and transmit the converted digital audio signal to the second conversion chip using the first transmission protocol;

[0034] The second conversion chip is used to receive the converted digital audio signal, perform digital-to-analog conversion on the converted digital audio signal to obtain an analog audio signal, and transmit the analog audio signal to the audio interface.

[0035] Optionally, in a specific implementation, the audio processing module is further used to obtain an analog audio signal through the audio interface, process the analog audio signal to obtain a digital audio signal, and transmit the digital audio signal to the lightning interface;

[0036] Correspondingly, the second conversion chip is also used to obtain an analog audio signal through the audio interface, and perform analog-to-digital conversion on the analog audio signal to obtain a digital audio signal, and transmit the digital audio signal to the first conversion chip;

[0037] The first conversion chip is also used to receive the digital audio signal and transmit the digital audio signal to the first conversion interface using the first transmission protocol;

[0038] The first conversion interface is also used to receive a digital audio signal, perform level conversion on the digital audio signal, and transmit the converted digital audio signal to the lightning interface.

[0039] Optionally, in a specific implementation, the audio processing module is further used to receive a control signal through an audio interface, and adjust the analog audio signal according to the control signal;

[0040] Correspondingly, the first conversion chip is also connected to the audio interface, and the first conversion chip is also used to receive the control signal through the audio interface, and transmit the control signal to the second conversion chip using the second transmission protocol;

[0041] The second conversion chip is also used to adjust the analog audio signal according to the control signal.

[0042] Optionally, in a specific implementation, the power management submodule includes a low dropout linear regulator;

[0043] The low voltage drop linear regulator is connected to the lightning interface and the conversion submodule respectively;

[0044] The low voltage drop linear regulator is used to obtain the power supply current through the lightning interface, adjust the voltage of the power supply current, and transmit the adjusted power supply current to the conversion sub-module to supply power to the conversion sub-module.

[0045] In a third aspect, the present application provides an adapter, the adapter comprising: a switching device as in the first aspect and an authentication device as in the second aspect.

[0046] The beneficial effects of the embodiments of the present application include, for example: on the one hand, it can support the fast charging mode of the lightning interface; on the other hand, it is small in size, low in cost, and has good versatility, which is conducive to improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0048] Figure 1 A schematic diagram of an authentication device provided in an embodiment of the present application;

[0049] Figure 2 A schematic diagram of another authentication device provided in an embodiment of the present application;

[0050] Figure 3 A schematic diagram of the connection relationship of an authentication device provided in an embodiment of the present application;

[0051] Figure 4 A schematic diagram of a switching device provided in an embodiment of the present application;

[0052] Figure 5 A schematic diagram of another switching device provided in an embodiment of the present application;

[0053] Figure 6 A schematic diagram of another switching device provided in an embodiment of the present application;

[0054] Figure 7 A schematic diagram of another switching device is provided for an embodiment of the present application;

[0055] Figure 8 A schematic diagram of an adapter provided in an embodiment of the present application;

[0056] Fig. 9 A schematic diagram of a pin of a lightning interface provided in an embodiment of the present application;

[0057] Fig.10 A schematic diagram of the pins of an audio verification module provided in an embodiment of the present application;

[0058] Fig.11 A schematic diagram of the pins of a power management submodule provided in an embodiment of the present application;

[0059] Fig.12 A schematic diagram of a first conversion interface provided in an embodiment of the present application;

[0060] Fig.13 A schematic diagram of 18 pins of a first conversion chip provided in an embodiment of the present application;

[0061] Fig.14 A schematic diagram of another 18 pins of a first conversion chip provided in an embodiment of the present application;

[0062] Fig.15 A schematic diagram of another 18 pins of a first conversion chip provided in an embodiment of the present application;

[0063] Fig.16 A schematic diagram of another 18 pins of a first conversion chip provided in an embodiment of the present application;

[0064] Fig.17 A schematic diagram of the connection of some pins of a first conversion chip provided in an embodiment of the present application;

[0065] Fig.18 A pin diagram of a second conversion chip provided in an embodiment of the present application;

[0066] Fig.19 A schematic diagram of an audio interface provided in an embodiment of the present application.

[0067] Icon: authentication device 10, coprocessor 101, coprocessor chip 111, first resistor 121, charging interface 102, charging module 112, adapter 20, audio interface 201, lightning interface 202, audio processing module 203, power management submodule 213, conversion submodule 223, first conversion interface 2203, first conversion chip 2213, second conversion chip 2223, audio verification module 204, adapter 30. DETAILED DESCRIPTION

[0068] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0069] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0070] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0071] In the description of the present application, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear to indicate an orientation or position relationship, it is based on the orientation or position relationship shown in the drawings, or is the orientation or position relationship in which the product of the invention is usually placed when used. It is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0072] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0073] It should be noted that, in the absence of conflict, the features in the embodiments of the present application may be combined with each other.

[0074] Before explaining the present application in detail, the application scenario of the present application is first introduced.

[0075] With the development of technology, audio playback devices are becoming more and more popular. In order to reduce the number of external interfaces, some existing audio playback devices usually only have one Lightning interface, which can be used to charge the device and transmit the audio signal to the headset.

[0076] When users need to transfer the audio signal of the audio player device to the headphones while charging the audio player device such as a mobile phone, they usually use an adapter to achieve this. The adapter includes a lightning interface, a charging interface and a headphone interface. When in use, the lightning interface of the adapter is connected to the lightning interface of the audio player device, the charging interface is connected to the power supply through the charging cable, and the headphone interface is connected to the headphones, so that the audio signal of the audio player device can be transferred to the headphones while charging the audio player device.

[0077] However, on the one hand, the lightning interface usually supports two charging modes, normal charging mode and fast charging mode. The normal charging mode is a charging mode with a rated power of 5V, a rated current of 1A, and a rated power of 5W, and the fast charging mode is a charging mode with a rated voltage of 9V, a rated current of 2A, and a rated power of 18W. The fast charging mode of the lightning interface requires the charging cable to be authenticated, and it can only be turned on after the authentication is passed. The existing adapters cannot authenticate the charging cable, so they only support the normal charging mode of the lightning interface, and the charging speed is slow. On the other hand, the audio processing solutions of existing adapters usually use dedicated integrated chips or LAM (Lightning Audio Module) modules. The versatility of dedicated integrated chips is weak, and the performance is single and cannot be replaced. The LAM module is large in size and high in cost, which makes the user experience of the adapter poor.

[0078] In order to solve this problem, the present application provides an authentication device, a switching device and an adapter. The converter includes an authentication device and a switching device. The authentication device includes: a coprocessor and a charging interface; the charging interface is connected to one end of the coprocessor, and the other end of the coprocessor is used to connect to the lightning interface of the external switching device; the charging interface is used to connect the charging line to obtain the parameter information of the charging line, and send the parameter information to the coprocessor; the coprocessor is used to authenticate the parameter information, generate authentication pass information after the authentication is passed, and send the authentication pass information to the lightning interface. The switching device includes: an audio interface, a lightning interface and an audio processing module; the audio processing module is connected to the audio interface and the lightning interface respectively; the audio interface is used to transmit audio signals; the lightning interface is used to transmit audio signals and / or charging currents, and, when receiving the authentication pass message sent by the authentication device, the first charging mode is turned on; the audio processing module is used to obtain digital audio signals through the lightning interface, process the digital audio signals to obtain analog audio signals, and transmit the analog audio signals to the audio interface. The adapter provided in the present application, on the one hand, authenticates the charging cable by setting an authentication module, thereby supporting the fast charging mode of the lightning interface; on the other hand, it is small in size, low in cost, and has good versatility, which is conducive to improving the user experience.

[0079] Please refer to Figure 1 The present application provides an authentication device 10, which includes: a coprocessor 101 and a charging interface 102; the charging interface 102 is connected to one end of the coprocessor 101, and the other end of the coprocessor 101 is used to connect to the lightning interface of the external adapter 20; the charging interface 102 is used to connect to the charging cable to obtain parameter information of the charging cable, and send the parameter information to the coprocessor 101; the coprocessor 101 is used to authenticate the parameter information, generate authentication pass information after the authentication is passed, and send the authentication pass information to the lightning interface.

[0080] Optionally, the charging interface 102 may be a USB (Universal Serial Bus) interface, such as a Micro USB interface and a USB Type C interface, etc. The charging interface 102 may also be a Lightning interface, which is not limited in the present application.

[0081] Optionally, the parameter information of the charging cable may be information indicating whether the charging cable has been authenticated. If the parameter information of the charging cable indicates that the charging cable has been authenticated, the coprocessor 101 passes the authentication and generates authentication pass information, and sends the authentication pass information to the lightning interface to enable the lightning interface to start a first charging mode, namely, a fast charging mode. Optionally, the fast charging mode may be a charging mode with a rated voltage of 9V, a rated current of 2A, and a rated power of 18W.

[0082] Optionally, the parameter information of the charging cable can also be the material information and structural information of the charging cable. The coprocessor 101 authenticates the material information and structural information of the charging cable, that is, determines whether the material information and structural information of the charging cable meet the preset standard. If so, the authentication is passed and authentication pass information is generated, and the authentication pass information is sent to the lightning interface to enable the lightning interface to start the first charging mode. It should be noted that the preset standard here can be a charging cable standard formulated by a manufacturer of the lightning interface.

[0083] In the embodiment of the present application, after the charging interface 102 is connected to the charging cable, parameter information of the charging cable is obtained and the parameter information is sent to the coprocessor 101; the coprocessor 101 authenticates the parameter information, generates authentication pass information after the authentication is passed, and sends the authentication pass information to the lightning interface. After receiving the authentication pass information, the lightning interface can start the first charging mode, that is, the fast charging mode, so as to quickly charge the device connected to the lightning interface.

[0084] See also Figure 2 Optionally, in a specific implementation, the coprocessor 101 includes: a coprocessor chip 111 and a first resistor 121, the coprocessor chip 111 includes: a first pin, a second pin, a third pin and a fourth pin; the first pin and the second pin are respectively connected to the charging interface 102, the third pin is grounded, and the fourth pin is used to connect to the lightning interface; the second pin is also connected to the lightning interface through the first resistor 121.

[0085] It should be noted that, in order to make the drawings concise, Figure 2 The pins and their connection relationships in each chip that are not related to the present application are not shown in the subsequent drawings.

[0086] Optionally, in a specific implementation, the charging interface 102 is also used to connect to the lightning interface; the charging interface 102 includes: a charging module 112, the charging module 112 includes: a fifth pin, a sixth pin, a seventh pin and an eighth pin; the fifth pin is grounded, the sixth pin and the eighth pin are respectively connected to one end of the coprocessor 101, and the seventh pin is used to connect to the lightning interface.

[0087] Specifically, the first pin of the co-processing chip 111 can be connected to the eighth pin of the charging module 112, the second pin of the co-processing chip 111 can be directly connected to the sixth pin of the charging module 112, and connected to the lightning interface through the first resistor 121, the third pin of the co-processing chip 111 can be grounded, the fourth pin of the co-processing chip 111 can be connected to the lightning interface, the fifth pin of the charging module 112 can be grounded, and the seventh pin of the charging module 112 can be connected to the lightning interface.

[0088] See also Figure 3 , Figure 3 For Figure 2 Schematic diagram of the connection relationship between the corresponding co-processing chip 111, the charging interface 102 and the lightning interface, wherein different pins with the same input signal or output signal indicate that there is a connection relationship between the different pins, for example Figure 3 In the embodiment, the input signal or output signal of the first pin is USB_CC, and the input signal or output signal of the eighth pin is also USB_CC, which means that the first pin and the eighth pin have a connection relationship. The connection relationship in the subsequent drawings about chip pins is similar to this, and this application will not repeat it.

[0089] See also Figure 4 The present application provides a switching device 20, which includes: an audio interface 201, a lightning interface 202 and an audio processing module 203; the audio processing module 203 is connected to the audio interface 201 and the lightning interface 202 respectively; the audio interface 201 is used to transmit audio signals; the lightning interface 202 is used to transmit audio signals and / or charging currents, and, when receiving an authentication pass message sent by the authentication device 10, start a first charging mode; the audio processing module 203 is used to obtain digital audio signals through the lightning interface 202, process the digital audio signals to obtain analog audio signals, and transmit the analog audio signals to the audio interface 201.

[0090] In the embodiment of the present application, the audio interface 201 can be a 3.5mm headphone interface, which has good versatility and is conducive to improving the user experience. Of course, this is just an exemplary description, and the headphone interface can also be a 2.5mm headphone interface, a 6.3mm headphone interface, etc., and this application does not make specific limitations on this.

[0091] It should be noted that the audio interface 201 is used to transmit audio signals, that is, when one end of the audio interface 201 receives an audio signal, the audio signal is output from the other end. The lightning interface 202 is used to transmit audio signals and / or charging currents, that is, when one end of the lightning interface 202 receives an audio signal and / or charging current, the audio signal and / or charging current is output from the other end. In addition, the lightning interface 202 is also used to start the first charging mode when receiving an authentication pass message sent by the authentication device 10. The first charging mode is the aforementioned fast charging mode, which will not be repeated here.

[0092] In addition, due to the small size of the earphone, it usually does not have the functions of analog-to-digital conversion and digital-to-analog conversion, and the lightning interface 202 only has the function of transmitting digital audio signals. Therefore, the digital audio signal output by the device connected to the lightning interface 202 through the lightning interface 202 needs to be converted from digital to analog, and then converted into an analog audio signal and transmitted to the earphone through the audio interface 201, so that the earphone can play normally. The audio processing module 203 in the embodiment of the present application is used to obtain the digital audio signal through the lightning interface 202, process the digital audio signal to obtain an analog audio signal, and transmit the analog audio signal to the audio interface 201, so that the earphone connected to the audio interface 201 can play the audio corresponding to the digital audio interface 201 normally.

[0093] It should be noted that the audio signal in the embodiment of the present application refers to an information carrier of frequency and amplitude changes of regular sound waves with voice, music and sound effects; the analog audio signal in the embodiment of the present application refers to a signal that uses the amplitude of an analog voltage to represent the strength of the sound; the digital audio signal in the embodiment of the present application is a data sequence, which is a signal composed of many binary numbers 1 and 0 by converting the analog audio signal into a signal through sampling and quantization.

[0094] The adapter 20 and the audio processing module 203 provided in the embodiment of the present application allow the use of universal chips for development, which can make the adapter 20 smaller in size, lower in cost, and more versatile, thereby improving the user experience.

[0095] See also Figure 5 Optionally, in a specific implementation, the adapter 20 further includes an audio verification module 204 ; the audio verification module 204 is connected to the lightning interface 202 ; the audio verification module 204 is used to obtain device information of a device connected to the audio interface 201 through the lightning interface 202 .

[0096] Specifically, the device connected to the audio interface 201 here can be headphones, headsets, etc. Taking headphones as an example, when the audio interface 201 is connected to the headphones, the audio verification module 204 obtains the device information of the headphones through the lightning interface 202. The device information of the headphones may include the type of headphones, production date and other information.

[0097] Optionally, after the audio verification module 204 obtains the device information of the headset, it can authenticate the headset based on the device information so that the headset can work normally with the lightning interface 202.

[0098] See also Figure 6Optionally, in a specific implementation, the audio processing module 203 includes a power management submodule 213 and a conversion submodule 223; the power management submodule 213 is respectively connected to the lightning interface 202 and the conversion submodule 223; the conversion submodule 223 is also respectively connected to the lightning interface 202 and the audio interface 201; the power management submodule 213 is used to obtain a power supply current through the lightning interface 202, and supply power to the conversion submodule 223 according to the power supply current; the conversion submodule 223 is used to obtain a digital audio signal through the lightning interface 202, process the digital audio signal to obtain an analog audio signal, and transmit the analog audio signal to the audio interface 201.

[0099] Specifically, the power supply current can be provided by an external device, such as a mobile phone, connected to the lightning interface 202. The power management submodule 213 obtains the power supply current through the lightning interface 202. The power supply current here is usually at a high voltage and cannot be directly supplied to the conversion submodule 223. The power submodule in the embodiment of the present application performs voltage reduction and voltage stabilization on the power supply current and then outputs it to the conversion submodule 223 to supply power to the conversion submodule 223, thereby improving the safety of the power supply and improving the stability of the adapter 20.

[0100] It should be noted that the functions of the conversion submodule 223 include but are not limited to digital-to-analog conversion. The functions of the conversion submodule 223 are described in detail below.

[0101] See also Figure 7 Optionally, in a specific implementation, the conversion submodule 223 includes a first conversion interface 2203, a first conversion chip 2213 and a second conversion chip 2223; the first conversion interface 2203 is respectively connected to the first conversion chip 2213 and the lightning interface 202; the first conversion chip 2213 is also respectively connected to the second conversion chip 2223 and the power management submodule 213; the second conversion chip 2223 is also respectively connected to the first conversion chip 2213, the power management submodule 213 and the audio interface 201; the first conversion interface 22 03 is used to obtain the digital audio signal through the lightning interface 202, and perform level conversion on the digital audio signal, and transmit the converted digital audio signal to the first conversion chip 2213; the first conversion chip 2213 is used to receive the converted digital audio signal, and transmit the converted digital audio signal to the second conversion chip 2223 according to the first transmission protocol; the second conversion chip 2223 is used to receive the converted digital audio signal, and perform digital-to-analog conversion on the converted digital audio signal to obtain an analog audio signal, and transmit the analog audio signal to the audio interface 201.

[0102] Specifically, the levels of the signals output or input by the lightning interface 202 and the first conversion chip 2213 are usually not in the same range, so the lightning interface 202 and the first conversion chip 2213 are usually unable to communicate directly. The first conversion interface 2203 in the embodiment of the present application obtains the digital audio signal through the lightning interface 202, and performs level conversion on the digital audio signal, and transmits the converted digital audio signal to the first conversion chip 2213, thereby realizing the communication interaction between the lightning interface 202 and the first conversion chip 2213. It should be noted that the first conversion interface 2203 here can be an LVDS (Low Voltage Differential Signaling) interface, that is, an RS-644 bus interface, which is conducive to achieving low noise, low power consumption, low bit error rate, low crosstalk and low radiation. The transmission medium of the first conversion interface 2203 can be a copper PCB (Printed Circuit Board) connection or a balanced cable, which is not limited in the present application.

[0103] In addition, the lightning interface 202 can usually only receive or output signals transmitted by the private protocol set by the manufacturer of the lightning interface 202, and cannot receive or output signals transmitted by other protocols. The first conversion chip 2213 in the embodiment of the present application, after receiving the digital audio signal converted by the first conversion interface 2203, performs protocol conversion on the converted digital audio signal, that is, transmits the converted digital audio signal to the second conversion chip 2223 in the first transmission protocol to realize the communication between the lightning interface 202 and the audio interface 201. It should be noted that the first conversion chip 2213 here can be the main control chip, and the first transmission protocol can be I2S (Inter-IC Sound, integrated circuit built-in audio) protocol, USBaudio (Universal Serial Bus audio, universal serial bus audio) protocol, SPI (Serial PeripheralInterface, serial peripheral interface) protocol, etc., and this application does not limit this.

[0104] Optionally, the second conversion chip 2223 may be a codec (COder-DECoder).

[0105] Optionally, the power management submodule 213 is specifically configured to obtain a power supply current through the lightning interface 202 , and supply power to the first conversion chip 2213 and the second conversion chip 2223 of the conversion submodule 223 according to the power supply current.

[0106] Optionally, in a specific implementation, the audio processing module 203 is also used to obtain an analog audio signal through the audio interface 201, process the analog audio signal to obtain a digital audio signal, and transmit the digital audio signal to the lightning interface 202; accordingly, the second conversion chip 2223 is also used to obtain an analog audio signal through the audio interface 201, and perform analog-to-digital conversion on the analog audio signal to obtain a digital audio signal, and transmit the digital audio signal to the first conversion chip 2213; the first conversion chip 2213 is also used to receive the digital audio signal, and transmit the digital audio signal to the first conversion interface 2203 using a first transmission protocol; the first conversion interface 2203 is also used to receive the digital audio signal, perform level conversion on the digital audio signal, and transmit the converted digital audio signal to the lightning interface 202.

[0107] Specifically, the adapter 20 provided in the embodiment of the present application can not only convert the digital audio signal output by the device connected to the lightning interface 202 into an analog audio signal and transmit it to the audio interface 201 for earphone playback, but also receive the analog audio signal input by the earphone microphone through the audio interface 201, and convert the analog audio signal into a digital audio signal and output it through the lightning interface 202. The specific process is similar to the aforementioned process of converting the digital audio signal output by the device connected to the lightning interface 202 into an analog audio signal and transmitting it to the audio interface 201, and will not be repeated here.

[0108] Optionally, in a specific implementation, the audio processing module 203 is also used to receive a control signal through the audio interface 201, and adjust the analog audio signal according to the control signal; accordingly, the first conversion chip 2213 is also connected to the audio interface 201, and the first conversion chip 2213 is also used to receive a control signal through the audio interface 201, and transmit the control signal to the second conversion chip 2223 via a second transmission protocol; the second conversion chip 2223 is also used to adjust the analog audio signal according to the control signal.

[0109] Existing headphones are usually equipped with a control module, through which functions such as controlling the volume, pausing, starting, playing, previous song, next song, etc. can be realized. In the embodiment of the present application, when the user sends a control signal through the control module of the headphones, the first conversion chip 2213 receives the control signal through the audio interface 201, and transmits the control signal to the second conversion chip 2223 in a second transmission protocol. The second transmission protocol here can be an I2C (Inter-Integrated Circuit, two-wire serial bus) protocol, which is not limited in the present application. The second conversion chip 2223 adjusts the parameters of the analog audio signal according to the control signal, thereby controlling the output analog audio signal.

[0110] Optionally, in a specific implementation, the power management submodule 213 includes a low voltage dropout linear regulator; the low voltage dropout linear regulator is respectively connected to the lightning interface 202 and the conversion submodule 223; the low voltage dropout linear regulator is used to obtain the power supply current through the lightning interface 202, adjust the voltage of the power supply current, and transmit the adjusted power supply current to the conversion submodule 223 to supply power to the conversion submodule 223.

[0111] Specifically, the power supply current can be provided by an external device, such as a mobile phone, connected to the lightning interface 202. The power management submodule 213 obtains the power supply current through the lightning interface 202. The power supply current here is usually of a higher voltage and cannot be directly supplied to the conversion submodule 223 for use. The power submodule in the embodiment of the present application uses a low voltage difference linear regulator to step down and stabilize the power supply current and then outputs it to the conversion submodule 223 to supply power to the conversion submodule 223, thereby improving the safety of the power supply and enhancing the stability of the adapter 20.

[0112] See also Figure 8 The present application provides an adapter 30, which includes: the adapter 20 and the authentication device 10 as described in the above embodiments. The structures and principles of the adapter 20 and the authentication device 10 can refer to the above embodiments, and will not be repeated here.

[0113] Optionally, in the above adapter 30 , the lightning interface 202 in the adapter 20 is connected to the coprocessor 101 in the authentication device 10 .

[0114] The following diagrammatic method is used to illustrate the pins and connection relationships of each interface and module provided in the embodiments of the present application. It should be noted that, in order to make the drawings simple, the following drawings do not show the pins and their connection relationships in each chip that are not related to the present application. In addition, as mentioned above, different pins with the same input signal or output signal indicate that there is a connection relationship between the different pins. The connection relationship between the pins is explained below.

[0115] See also Figure 9-Figure 19 , Fig. 9 A schematic diagram of the pins of a lightning interface 202 provided in an embodiment of the present application; Fig.10 A schematic diagram of the pins of an audio verification module 204 provided in an embodiment of the present application; Fig.11 A schematic diagram of the pins of a power management submodule 213 provided in an embodiment of the present application; Fig.12 A schematic diagram of a first conversion interface 2203 provided in an embodiment of the present application; Fig.13 A schematic diagram of 18 pins of a first conversion chip 2213 provided in an embodiment of the present application; Fig.14A schematic diagram of the other 18 pins of the first conversion chip 2213 provided in the embodiment of the present application; Fig.15 A schematic diagram of another 18 pins of a first conversion chip 2213 provided in an embodiment of the present application; Fig.16 A schematic diagram of another 18 pins of a first conversion chip 2213 provided in an embodiment of the present application; Fig.17 A schematic diagram of the connection of some pins of a first conversion chip 2213 provided in an embodiment of the present application; Fig.18 A pin diagram of a second conversion chip 2223 provided in an embodiment of the present application; Fig.19 A schematic diagram of an audio interface 201 provided in an embodiment of the present application.

[0116] According to the following Figure 9-Figure 19 The connection relationship between each pin is described in detail.

[0117] Pin 1 of the lightning interface 202 and pin 9 of the lightning interface 202 are connected to the EN pin and the IN pin of each chip in the power management submodule 213, and are also connected to the second pin of the coprocessor 101 through the first resistor 121; Pin 2 of the lightning interface 202 is connected to pin 10; Pin 3 of the lightning interface 202 is connected to pin 11; Pin 4 and pin 12 of the lightning interface 202 are connected to the seventh pin of the charging interface 102; Pin 5 and pin 13 of the lightning interface 202 are connected to pin SDQ of the audio verification module 204, and are connected to the first Pin F6 of a conversion chip 2213 is connected to the fourth pin of the coprocessor 101 through a resistor; Pin 6 and Pin 14 of the lightning interface 202 are connected to the output end D- of the diode in the first conversion interface 2203, and are also connected to Pin G8 of the first conversion chip 2213; Pin 7 and Pin 15 of the lightning interface 202 are connected to the input end D+ of the diode in the first conversion interface 2203, and are also connected to Pin G9 of the first conversion chip 2213; Pin 8 of the lightning interface 202 is grounded; Pin 16 of the lightning interface 202 is grounded.

[0118] The pin VDD of the audio verification module 204 is grounded through a capacitor, the pin GND of the audio verification module 204 is grounded, and the pin CS of the audio verification module 204 is connected to the pin B6 of the first conversion chip 2213 .

[0119] The power management submodule 213 includes three power management chips, namely the first power management chip, the second power management chip and the third power management chip. The pin OUT of the first power management chip is connected to the 2.5V power supply voltage (i.e., VCC2.5, hereinafter referred to as the 2.5V power supply voltage), and is also grounded through a capacitor; the pin GND of the first power management chip is grounded; the pin IN of the first power management chip is grounded through a capacitor; the pin OUT of the second power management chip is connected to the 1.2V power supply voltage (i.e., VCC1.2, hereinafter referred to as the 1.2V power supply voltage), and is also grounded through a capacitor; the pin GND of the second power management chip is grounded; the pin IN of the second power management chip is grounded through a capacitor; the pin OUT of the third power management chip is connected to the 1.8V power supply voltage (i.e., VCC1.8, hereinafter referred to as the 1.8V power supply voltage), and is also grounded through a capacitor; the pin GND of the third power management chip is grounded; the pin IN of the third power management chip is grounded through a capacitor.

[0120] The first conversion interface 2203 includes two capacitors, four resistors and a diode. The input end D+ of the diode is grounded through a capacitor, and is also connected to pin H6 of the first conversion chip 2213 through a resistor, and is also connected to pin H7 of the first conversion chip 2213 through another resistor, and is also connected to pin G9 of the first conversion chip 2213; the output end D- of the diode is grounded through another capacitor, and is also connected to pin H3 of the first conversion chip 2213 through a resistor, and is also connected to pin H4 of the first conversion chip 2213 through another resistor, and is also connected to pin G8 of the first conversion chip 2213.

[0121] Pin A1 of the first conversion chip 2213 is grounded and connected to VCC1.2 through a capacitor; Pin A2 of the first conversion chip 2213 is connected to VCC1.2; Pin A3 of the first conversion chip 2213 is connected to Pin MCLK of the second conversion chip 2223; Pin A4 of the first conversion chip 2213 is connected to Pin SCLK of the second conversion chip 2223; Pin A5 of the first conversion chip 2213 is connected to VCC2.5 and grounded through a capacitor; Pin A6 of the first conversion chip 2213 is connected to Pin DSIN of the second conversion chip 2223; Pin A7 and pin A8 of the first conversion chip 2213 are connected to VCC1.2; Pin A9 of the first conversion chip 2213 is grounded and is also connected to VCC1.2 through a capacitor; Pin B1 of the first conversion chip 2213 is connected to Pin CCLK of the second conversion chip 2223; Pin B2 of the first conversion chip 2213 is grounded through a capacitor; Pin B8 of the first conversion chip 2213 is connected to Pin ADSOUT of the second conversion chip 2223; Pin C1 of the first conversion chip 2213 is connected to Pin CDATA of the second conversion chip 2223; Pin C5 ... 23; pin D9 of the first conversion chip 2213 is grounded; pin E1 of the first conversion chip 2213 is grounded; pin E4, pin F4 and pin G1 of the first conversion chip 2213 are connected to the audio input and output interface of the audio interface 201; pin E5 of the first conversion chip 2213 is connected to VCC2.5 through two resistors and to ground through another two resistors; pin E9 of the first conversion chip 2213 is connected to VCC2.5 and to ground through a capacitor; pin F3 of the first conversion chip 2213 is grounded through a resistor and to VCC2.5 through another three resistors. 5; pin G2 of the first conversion chip 2213 is connected to VCC2.5 through a resistor and is also grounded through three other resistors; pin H1 of the first conversion chip 2213 is grounded; pin H2 of the first conversion chip 2213 is connected to VCC2.5 and is also grounded through a capacitor, and is also connected to pin H5 of the first conversion chip 2213 through two capacitors; pin H5 of the first conversion chip 2213 is connected to VCC2.5 and is also grounded through a capacitor; pin H8 of the first conversion chip 2213 is connected to VCC1.2 and is also grounded through a capacitor; pin H9 of the first conversion chip 2213 is grounded.

[0122] The pin CE0 of the second conversion chip 2223 is grounded through a resistor; the pin PVDD of the second conversion chip 2223 is connected to VCC2.5, and is also connected to the pin DGND and the pin PGND of the second conversion chip 2223 through a capacitor; the pin DVDD of the second conversion chip 2223 is connected to VCC2.5, and is also connected to the pin DGND and the pin PGND of the second conversion chip 2223 through a capacitor; the pin DGND and the pin PGND of the second conversion chip 2223 are connected and then grounded; the pin CPN and the pin CPP of the second conversion chip 2223 are connected through a capacitor; the pin CPVSSP of the second conversion chip 2223 is grounded through a capacitor; the pin DACVREF of the second conversion chip 2223 is grounded through a capacitor; the pin ADCVREF of the second conversion chip 2223 is grounded through a capacitor; the pin VMID of the second conversion chip 2223 is grounded through a capacitor; the pin RIN2 of the second conversion chip 2223 is grounded through a capacitor; Pin LIN2 of the second conversion chip 2223 is grounded through two capacitors, and is also connected to the MIC interface of the audio interface through a capacitor, and is also connected to the pin MICBIAS of the second conversion chip 2223 through a capacitor and two resistors, and is also grounded through a capacitor, a resistor and a capacitor; pin MICBIAS of the second conversion chip 2223 is grounded after being connected to pin GNDA and pin CPGND of the second conversion chip 2223 through a capacitor; pin VDDA of the second conversion chip 2223 is connected to VCC2.5 through a resistor, and is also grounded through a capacitor; pin CPVDD of the second conversion chip 2223 is connected to VCC1.8, and is also grounded through a capacitor; pin CPGNDREF of the second conversion chip 2223 is grounded; pin HPL of the second conversion chip 2223 is connected to the left channel interface of the audio interface 201 through a resistor; pin HPR of the second conversion chip 2223 is connected to the right channel interface of the audio interface 201 through a resistor.

[0123] The audio interface 201 includes an audio input and output interface, a left channel interface, a right channel interface and a MIC interface; the audio input and output interface of the audio interface 201 is connected to the MIC interface via a resistor.

[0124] The beneficial effects of the embodiments of the present application include, for example: on the one hand, it can support the fast charging mode of the lightning interface 202, and on the other hand, it is small in size, low in cost, and has good versatility, which is conducive to improving the user experience.

[0125] In summary, the present application provides an authentication device 10, a switching device 20 and an adapter 30. The converter includes the authentication device 10 and the switching device 20. The authentication device 10 includes: a coprocessor 101 and a charging interface 102; the charging interface 102 is connected to one end of the coprocessor 101, and the other end of the coprocessor 101 is used to connect to the lightning interface 202 of the external switching device 20; the charging interface 102 is used to connect the charging cable to obtain parameter information of the charging cable, and send the parameter information to the coprocessor 101; the coprocessor 101 is used to authenticate the parameter information, generate authentication pass information after the authentication is passed, and send the authentication pass information to the lightning interface 202. The adapter 20 includes: an audio interface 201, a lightning interface 202 and an audio processing module 203; the audio processing module 203 is connected to the audio interface 201 and the lightning interface 202 respectively; the audio interface 201 is used to transmit audio signals; the lightning interface 202 is used to transmit audio signals and / or charging currents, and, upon receiving an authentication pass message sent by the authentication device 10, start the first charging mode; the audio processing module 203 is used to obtain digital audio signals through the lightning interface 202, process the digital audio signals to obtain analog audio signals, and transmit the analog audio signals to the audio interface 201. The adapter 30 provided in the present application, on the one hand, authenticates the charging line by setting an authentication module, thereby supporting the fast charging mode of the lightning interface 202; on the other hand, it is small in size, low in cost, and has good versatility, which is conducive to improving the user experience.

[0126] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. An authentication device, characterized in that: The authentication device includes: a coprocessor and a charging interface; The charging interface is connected to one end of the coprocessor, and the other end of the coprocessor is used to connect to the lightning interface of an external adapter; The charging interface is used to connect a charging cable to obtain parameter information of the charging cable, and send the parameter information to the coprocessor, wherein the parameter information is information indicating whether the charging cable is authenticated, or the parameter information is material information and structure information of the charging cable; The coprocessor is used to authenticate the parameter information, generate authentication pass information after the authentication is passed, and send the authentication pass information to the lightning interface.

2. The authentication device according to claim 1, characterized in that: The coprocessor comprises: a coprocessor chip and a first resistor, and the coprocessor chip comprises: a first pin, a second pin, a third pin and a fourth pin; The first pin and the second pin are connected to the charging interface respectively, the third pin is grounded, and the fourth pin is used to connect to the lightning interface; The second pin is also connected to the lightning interface through the first resistor.

3. The authentication device according to claim 1, characterized in that: The charging interface is also used to connect to the lightning interface; the charging interface includes: a charging module, and the charging module includes: a fifth pin, a sixth pin, a seventh pin and an eighth pin; The fifth pin is grounded, the sixth pin and the eighth pin are respectively connected to one end of the coprocessor, and the seventh pin is used to connect to the lightning interface.

4. A switching device, characterized in that: The adapter device includes: an audio interface, a lightning interface and an audio processing module; The audio processing module is connected to the audio interface and the lightning interface respectively; The audio interface is used to transmit an audio signal; the lightning interface is used to transmit an audio signal and / or a charging current, and, when receiving an authentication pass message sent by an authentication device, the first charging mode is turned on; The audio processing module is used to obtain a digital audio signal through the lightning interface, process the digital audio signal to obtain an analog audio signal, and transmit the analog audio signal to the audio interface; The authentication device includes: a coprocessor and a charging interface; The charging interface is connected to one end of the coprocessor, and the other end of the coprocessor is used to connect to the lightning interface of an external adapter; The charging interface is used to connect a charging cable to obtain parameter information of the charging cable, and send the parameter information to the coprocessor, wherein the parameter information is information indicating whether the charging cable is authenticated, or the parameter information is material information and structure information of the charging cable; The coprocessor is used to authenticate the parameter information, generate the authentication pass information after the authentication is passed, and send the authentication pass information to the lightning interface.

5. The switching device according to claim 4, characterized in that: The switching device also includes an audio verification module; The audio verification module is connected to the lightning interface; The audio verification module is used to obtain device information of a device connected to the audio interface through the lightning interface.

6. The switching device according to claim 4, characterized in that: The audio processing module includes a power management submodule and a conversion submodule; The power management submodule is connected to the lightning interface and the conversion submodule respectively; The conversion submodule is also connected to the lightning interface and the audio interface respectively; The power management submodule is used to obtain the power supply current through the lightning interface and supply power to the conversion submodule according to the power supply current; The conversion submodule is used to obtain a digital audio signal through the lightning interface, process the digital audio signal to obtain an analog audio signal, and transmit the analog audio signal to the audio interface.

7. The switching device according to claim 6, characterized in that: The conversion submodule includes a first conversion interface, a first conversion chip and a second conversion chip; The first conversion interface is connected to the first conversion chip and the lightning interface respectively; The first conversion chip is also connected to the second conversion chip and the power management submodule respectively; The second conversion chip is also connected to the power management submodule and the audio interface respectively; The first conversion interface is used to obtain a digital audio signal through the lightning interface, perform level conversion on the digital audio signal, and transmit the converted digital audio signal to the first conversion chip; The first conversion chip is used to receive the converted digital audio signal, and transmit the converted digital audio signal to the second conversion chip using a first transmission protocol; The second conversion chip is used to receive the converted digital audio signal, perform digital-to-analog conversion on the converted digital audio signal to obtain an analog audio signal, and transmit the analog audio signal to the audio interface.

8. The switching device according to claim 7, characterized in that: The audio processing module is further used to obtain an analog audio signal through the audio interface, process the analog audio signal to obtain a digital audio signal, and transmit the digital audio signal to the lightning interface; Correspondingly, the second conversion chip is further used to obtain the analog audio signal through the audio interface, perform analog-to-digital conversion on the analog audio signal to obtain a digital audio signal, and transmit the digital audio signal to the first conversion chip; The first conversion chip is also used to receive the digital audio signal, and transmit the digital audio signal to the first conversion interface using a first transmission protocol; The first conversion interface is further used to receive the digital audio signal, perform level conversion on the digital audio signal, and transmit the converted digital audio signal to the lightning interface.

9. The switching device according to claim 7, characterized in that: The audio processing module is further used to receive a control signal through the audio interface and adjust the analog audio signal according to the control signal; Correspondingly, the first conversion chip is also connected to the audio interface, and the first conversion chip is also used to receive a control signal through the audio interface, and transmit the control signal to the second conversion chip using a second transmission protocol; The second conversion chip is further used to adjust the analog audio signal according to the control signal.

10. The switching device according to claim 6, characterized in that: The power management submodule includes a low voltage dropout linear regulator; The low voltage difference linear regulator is connected to the lightning interface and the conversion submodule respectively; The low voltage drop linear regulator is used to obtain the power supply current through the lightning interface, adjust the voltage of the power supply current, and transmit the adjusted power supply current to the conversion submodule to supply power to the conversion submodule.

11. An adapter, characterized in that: The adapter comprises: a switching device as described in any one of claims 4 to 10 and an authentication device as described in any one of claims 1 to 3.

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