CN112088472A - Double-interface switching circuit and Type-C concentrator - Google Patents
Double-interface switching circuit and Type-C concentrator Download PDFInfo
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- CN112088472A CN112088472A CN202080001039.9A CN202080001039A CN112088472A CN 112088472 A CN112088472 A CN 112088472A CN 202080001039 A CN202080001039 A CN 202080001039A CN 112088472 A CN112088472 A CN 112088472A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R29/00—Coupling parts for selective co-operation with a counterpart in different ways to establish different circuits, e.g. for voltage selection, for series-parallel selection, programmable connectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/66—Structural association with built-in electrical component
- H01R13/665—Structural association with built-in electrical component with built-in electronic circuit
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/66—Structural association with built-in electrical component
- H01R13/665—Structural association with built-in electrical component with built-in electronic circuit
- H01R13/6675—Structural association with built-in electrical component with built-in electronic circuit with built-in power supply
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/66—Structural association with built-in electrical component
- H01R13/665—Structural association with built-in electrical component with built-in electronic circuit
- H01R13/6683—Structural association with built-in electrical component with built-in electronic circuit with built-in sensor
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/66—Structural association with built-in electrical component
- H01R13/70—Structural association with built-in electrical component with built-in switch
Abstract
The application discloses a double-interface switching circuit and a Type-C concentrator, wherein the double-interface switching circuit comprises two first interfaces (an interface A and an interface B); the detection circuit generates a corresponding detection signal when the first interface is accessed to the external equipment; when the control circuit determines that the corresponding first interface is accessed with a power supply signal according to the detection signal, the control circuit transmits the power supply signal to the other first interface for output, and the other first interface is an interface for transmitting a data signal; the control circuit is also configured to determine that the corresponding first interface is accessed to a data signal according to the detection signal, then another first interface is switched to be an interface for transmitting a power signal, double-interface blind plugging is realized, and the type of the interface access equipment can be automatically identified, so that a data signal transmission path is automatically switched, an interface function is flexibly configured, the interface data transmission efficiency is ensured and improved, the expansibility of the interface function is improved, and the reliability and the practicability of the double-interface switching circuit are improved.
Description
Technical Field
The application relates to the technical field of Type-C interfaces, in particular to a double-interface switching circuit and a Type-C concentrator.
Background
At present, with the development of science and technology, electronic products become more and more essential parts of people's life, people hope to be able to one machine for multiple purposes or one machine can expand many application functions to reduce the quantity, weight, etc. of the electronic equipment that carries, therefore, the electronic product of single interface has not satisfied people's demand. The Type-C interface is used as a double-sided pluggable interface, supports double-sided insertion of the USB interface, solves the worldwide problem of 'the USB is inserted for a long time', has high data transmission speed and high compatibility, and is widely applied to the aspects of data transmission and signal conversion. The traditional Type-C HUB (Type-C HUB) product design generally comprises a USB (universal serial bus) 3.0 interface, an HDMI (high-definition multimedia interface) interface and a Type-C interface for expansion; or two Type-C interfaces are included, but the interface function is fixedly set, for example, one Type-C interface is fixedly used for connecting a notebook computer, fetching data from the notebook computer, and expanding a USB interface, an HDMI interface, an RJ45 interface, an SD interface, and the like; another Type-C interface is fixedly used for connecting a power adapter, gets the electricity from the power adapter in order to charge (power consumption) the computer, and this brings very big inconvenience for user's in-service use, when pegging graft wrong Type-C interface, can influence data transmission and charge, is unfavorable for the function expansion of product to and influence product use and experience.
One of the purposes of the embodiment of the application is as follows: the utility model provides a dual interface switching circuit and Type-C concentrator, it is fixed to aim at solving the Type-C interface function that has Type-C HUB among the traditional technical scheme, and the Type that can not automatic identification interface access equipment leads to data transmission inefficiency, the poor problem of interface function expansibility with automatic switch-over signal path.
Disclosure of Invention
In order to solve the technical problem, the embodiment of the application adopts the following technical scheme:
in a first aspect, a dual interface switching circuit is provided, including: two first interfaces; the detection circuit is connected with each first interface and is configured to generate a corresponding detection signal when the first interface is connected to external equipment; the control circuit is respectively connected with the two first interfaces and the detection circuit, and is configured to transmit the power signal to the other first interface for output when the power signal is determined to be accessed to the corresponding first interface according to the detection signal, wherein the other first interface is an interface for transmitting a data signal; the control circuit is further configured to switch another first interface to be an interface for transmitting a power signal when it is determined that the corresponding first interface is accessed by a data signal according to the detection signal.
In a second aspect, there is provided a Type-C hub comprising a dual interface switching circuit as described in any one of the above; and the combination of (a) and (b),
and the second interface is connected with the double-interface switching circuit and is used for transmitting USB signals.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or exemplary technical descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a dual interface switching circuit according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a dual interface switching circuit according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a dual interface switching circuit according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of a dual interface switching circuit according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of a dual interface switching circuit according to an embodiment of the present disclosure;
fig. 6 is a schematic structural diagram of a dual interface switching circuit according to an embodiment of the present disclosure;
fig. 7 is a schematic structural diagram of a dual interface switching circuit according to an embodiment of the present disclosure;
fig. 8 is a schematic structural diagram of a dual interface switching circuit according to an embodiment of the present disclosure;
fig. 9 is a schematic structural diagram of a dual interface switching circuit according to an embodiment of the present application;
FIG. 10 is a schematic diagram of an exemplary circuit for detecting and controlling a circuit in a dual interface switching circuit according to an embodiment of the present disclosure;
fig. 11 is a schematic circuit diagram of an example of a gating switch circuit and a signal distribution circuit in a dual-interface switching circuit according to an embodiment of the present disclosure;
fig. 12 is a schematic structural diagram of a dual interface switching circuit according to an embodiment of the present application;
fig. 13 is a schematic diagram of an exemplary circuit of a power supply control circuit in a dual interface switching circuit according to an embodiment of the present disclosure;
fig. 14 is a schematic structural diagram of a Type-C hub according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the present application. It should be noted that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features. The meaning of "plurality" is two or more unless specifically limited otherwise.
In order to explain the technical solutions provided in the present application, the following detailed description is made with reference to specific drawings and examples. An embodiment of the present application provides a dual interface switching circuit, please refer to fig. 1, where fig. 1 illustrates a schematic structural diagram of the dual interface switching circuit provided in an embodiment of the present application, and the dual interface switching circuit includes: two first interfaces 11, a detection circuit 12 and a control circuit 13. Wherein, the two first interfaces 11 are an interface A and an interface B; the detection circuit 12 is connected with the interface A and the interface B and is configured to generate corresponding detection signals when the interface A and the interface B are connected with external equipment; the control circuit 13 is respectively connected with the interface a, the interface B and the detection circuit 12, and is configured to transmit the power signal to the interface B for output when the corresponding interface a is accessed with the power signal according to the detection signal, and the interface B is an interface for transmitting the data signal; the control circuit 13 is further configured to switch the interface B to an interface for transmitting the power signal when it is determined that the corresponding interface a accesses the data signal according to the detection signal.
In a specific implementation, the external device is a terminal device, such as a computer, a mobile phone, or a power supply device, such as a power adapter. The two first interfaces 11 can access external devices and transmit data or power signals output by the external devices. When the interface a and the interface B are connected to the external device, the interface a and the interface B transmit corresponding connection confirmation signals (CC signals) to the control circuit 13, and the detection circuit 12 generates corresponding detection signals, specifically, detects and generates power signals transmitted by the connected external device, according to the detection signals generated when the interface a and the interface B are connected to the external device. Therefore, when the control circuit 13 determines that the a interface is connected to the external device and transmits a power signal output by the external device according to the detection signal, the a interface is set as a power interface for connecting to a power device (e.g., a power adapter) and transmitting the power signal to the B interface to supply power to the external device (e.g., a computer) connected to the B interface, and the B interface is used as a data signal interface for transmitting data output by the external device (e.g., a computer); when the control circuit 13 determines that the interface a is accessed by a data signal according to the detection signal, the interface B is switched to an interface for transmitting a power signal, and the interface is used to access a power device (e.g., a power adapter), and transmit the power signal to the interface a to supply power to an external device (e.g., a computer) accessed by the interface a, where the interface a is used as a data transmission interface. Optionally, the data signal includes an audio/video signal and the like. Optionally, the two first interfaces 11 are both Type-C interfaces or Lightning interfaces, and when the external device is plugged in through the a interface and the B interface, the blind plugging is realized by inserting the plug in forward and backward.
According to the embodiment of the application, blind plugging of the double Type-C interfaces can be realized, the types of the interface access equipment can be automatically identified, the interface functions can be automatically switched, the interface functions are flexibly configured, the interface data transmission efficiency is improved, and the expansibility of the interface functions is improved.
Referring to fig. 2, in one embodiment, the detection circuit 12 includes: a first detection circuit 121 and a second detection circuit 122. A first detection circuit 121, connected to the a interface and the control circuit 13, configured to generate a first detection signal when the a interface is connected to a first power signal sent by a first external device; and a second detection circuit 122, connected to the B interface and control circuit 13, configured to generate a second detection signal when the B interface is connected to a second power signal transmitted by a second external device.
In a specific implementation, the first external device may be a terminal device, such as a computer, a mobile phone, or a power supply device, such as a power adapter; the second external device may be a terminal device such as a computer, a mobile phone, etc., or a power supply device such as a power adapter, etc. When the a interface is connected to the first external device, the first detection circuit 121 generates a first detection signal according to a first power signal sent by the first external device; and when the interface B is accessed into the second external equipment, generating a second detection signal according to a second power supply signal sent by the second external equipment. The control circuit 13 can determine whether the a interface and the B interface are connected to the external device and whether the connected external device is the power supply device by the first detection signal and the second detection signal, for example, when the first detection signal is a low level signal, it determines that the external device connected to the a interface is the power supply device. Therefore, when the control circuit 13 determines that the first external device accessed by the a interface transmits the first power signal output by the first external device according to the detection signal (i.e., the first detection signal and the second detection signal), the a interface is set as a power interface to access the power device (e.g., a power adapter), and transmits the power signal to the B interface to supply power to the second external device (e.g., a computer) accessed by the B interface, and the B interface is used as a data signal interface for transmitting data output by the second external device (e.g., a computer); when the control circuit 13 determines that the interface a is accessed by a data signal according to the detection signal, the interface B is switched to an interface for transmitting a power signal, and the interface is used to access a power device (e.g., a power adapter), and transmit the power signal to the interface a to supply power to a first external device (e.g., a computer) accessed by the interface a, where the interface a is used as a data transmission interface.
Whether this application embodiment can export electrical signal to the external equipment that A interface and B interface insert corresponds the detection to make control circuit confirm that the interface corresponds the external equipment type of inserting, thereby configure into power source or data transmission interface with the interface, realize the type that automatic identification interface inserted equipment, and automatic nimble configuration interface function, promoted the expansibility of interface function, improved dual interface switching circuit's practicality.
Referring to fig. 3, in one embodiment, the control circuit 13 is further configured to generate a gating control signal according to the first detection signal and the second detection signal, and the dual interface switching circuit further includes: the switching circuit 14 is gated. And the gating switch circuit 14 is connected with the two first interfaces 11 and the control circuit 13 and is configured to gate and output the data signal transmitted by one of the first interfaces 11 according to the gating control signal.
In a specific implementation, the two first interfaces 11 are an a interface and a B interface, and the control circuit 13 can determine whether the a interface and the B interface are respectively connected to a terminal device (e.g., a computer, a mobile phone, etc.) or a power supply device (e.g., a power adapter, etc.) according to the first detection signal and the second detection signal, so as to correspondingly generate a gating control signal to control the gating switch circuit 14 to gate and output a data signal sent by the terminal device connected to the first interface. For example, when the control circuit 13 determines that the interface a is accessed by a computer and the interface B is accessed by a power adapter according to the first detection signal and the second detection signal, the gating switch circuit 14 is controlled to gate and output the data signal sent by the first device accessed by the interface a, and simultaneously, the first power signal accessed by the interface B is transmitted to the computer terminal accessed by the interface a to charge the computer; when the control circuit 13 determines that the interface a is accessed by the computer and the interface B is not accessed by the device according to the first detection signal and the second detection signal, the gating switch circuit 14 is controlled to gate and output the data signal sent by the computer accessed by the interface a, and the interface B is switched to be the power interface for accessing the power adapter; when the control circuit 13 determines that the interface A is accessed to a power adapter according to the first detection signal and the second detection signal, and the interface B is accessed to a computer, the gating switch circuit 14 is controlled to gate and output the data signal sent by the computer accessed to the interface B, and simultaneously, the first power signal accessed to the interface A is transmitted to the computer end accessed to the interface B so as to charge the computer; when the control circuit 13 determines that the interface a is not accessed to the device according to the first detection signal and the second detection signal, and the interface B is accessed to the computer, the gating switch circuit 14 is controlled to gate and output the data signal sent by the computer accessed to the interface B, and the interface a is switched to the power interface for accessing the power adapter; thereby realize two interface blind plugs, and can automatic identification interface access device's type to automatic switch-over data signal transmission path, nimble configuration interface function has improved interface data transmission efficiency, has promoted interface function's expansibility and practicality.
Referring to fig. 3, in one embodiment, the control circuit 13 is further configured to generate a distribution enable signal according to the first detection signal and the second detection signal; the dual interface switching circuit further comprises: a signal distribution circuit 15. And the signal distribution circuit 15 is connected with the gate switching circuit 14 and the control circuit 13 and is configured to distribute and output the data signals gated and output by the gate switching circuit 14 according to the distribution enabling signals.
In specific implementation, data signals sent by external equipment can be transmitted through an interface a and an interface B, and the control circuit 13 controls the gating switch circuit 14 to gate and output the data signals sent by the external equipment according to different types of the external equipment accessed by the interfaces, for example, when the interface a is accessed to a computer and the interface B is accessed to a power adapter, the computer accessed by the interface a provides a first data signal, and the power adapter accessed by the interface B provides a second power signal; when the A interface is connected with the power adapter and the B interface is connected with the computer, the computer connected with the B interface provides a second data signal, and the power adapter connected with the A interface provides a first power signal. Optionally, the first data signal and the second data signal include data signals such as audio and video signals, and therefore the signal distribution circuit 15 distributes the first data signal or the second data signal output by the gating switch circuit 14 in a gating manner and outputs the first data signal or the second data signal to a rear-stage circuit, for example, an audio and video signal processing circuit or other application circuits, so that further gating output and configuration management of the data signals transmitted by the interface a and the interface B are achieved, information interaction between a module corresponding to the rear-stage circuit and external equipment is achieved, specific application requirements are met, and reliability and practicability of the dual-interface switching circuit are improved.
Referring to fig. 4, in one embodiment, the control circuit 13 is further configured to generate a power supply control signal according to the first detection signal and the second detection signal; the dual interface switching circuit further comprises: a power supply control circuit 16. And the power supply control circuit 16 is connected with the two first interfaces and the control circuit 13 and is configured to control the connection and disconnection between the first power supply signal and the two first interfaces 11 and between the second power supply signal and the two first interfaces 11 according to the power supply control signal. In specific implementation, the power supply control circuit 16 is connected in series between the interface a and the interface B and is connected to the control circuit 13, and when the interface a is connected to the power adapter, the control circuit 13 controls the power supply control circuit 16 to turn on a first power signal provided by the power adapter connected to the interface a to the interface B to supply power to a computer connected to the interface B, and turn off a second power signal connected to the interface B to prevent the second power signal from flowing back to the interface a and causing damage to components in the interface a and associated circuits. Similarly, the control circuit 13 can also transmit the second power signal provided by the power adapter accessed by the B interface to the computer terminal accessed by the a interface through controlling the power supply control circuit 16 when the B interface is accessed to the power adapter, so as to supply power to the computer, and turn off the first power signal accessed by the a interface, thereby preventing the first power signal from flowing backwards to the B interface, which causes the components in the B interface and the associated circuits to be damaged, so as to perform power supply backflow protection on the interface, and improve the safety and reliability of the interface switching circuit when the dual interface is inserted blindly.
Referring to fig. 5, in one embodiment, the gating switch circuit 14 includes: a first gate switching unit 141 and a second gate switching unit 142. A first gating switching unit 141 connected to the a interface, the B interface, and the control circuit 13, and configured to gate and output a positive data signal transmitted by one of the a interface and the B interface according to a first sub-gating control signal; a second gating switch unit 142, connected to the a interface, the B interface and the control circuit 13, and configured to gate and output a reverse data signal transmitted by one of the a interface and the B interface according to a second sub-gating control signal; wherein the gate control signal includes a first sub-gate control signal and a second sub-gate control signal.
In a specific implementation, the control circuit 13 may determine that the a interface is being inserted into the first external device or being inserted backwards into the first external device according to a connection confirmation signal (CC1 signal) correspondingly transmitted when the a interface accesses the external device, and the control circuit 13 may determine that the B interface is being inserted into the second external device or being inserted backwards into the second external device according to a connection confirmation signal (CC2 signal) correspondingly transmitted when the B interface accesses the external device. Optionally, when the first external device is plugged into the interface a, the interface a transmits the data signal sent by the first external device as a first forward data signal; on the contrary, when the first external device is inserted into the interface a in a reverse connection manner, the interface a transmits the data signal sent by the first external device as a first reverse connection data signal. When the second external equipment is plugged into the interface B, the interface B transmits the data signal sent by the second external equipment to be a second forward data signal; on the contrary, when the second external device is inserted into the interface B in a reverse connection mode, the interface B transmits the data signal sent by the second external device as a second reverse connection data signal.
When the control circuit 13 determines that the interface a is plugged into the first external device and the first external device sends a first power signal (i.e., a first detection signal that is not at a low level), a first sub-gating control signal at a first level is generated to control the first gating switching unit 141 to gate and output a first positive data signal sent by the first external device to the signal distribution circuit 15 for distribution and output, and at the same time, the control circuit 13 controls the interface B to be switched to the power interface for accessing the power adapter (i.e., a second external device), and the control circuit 13 may further control the power supply control circuit 16 to transmit a second power signal output by the power adapter accessed by the interface B to the interface a for supplying power to the first external device; when the control circuit 13 determines that the interface B is plugged into the second external device and the second external device does not send the second power signal, the first sub-gating control signal with the second level is generated to control the first gating switching unit 141 to gate and output the second forward data signal sent by the second external device to the signal distribution circuit 15 for distribution and then output, and at the same time, the control circuit controls to switch the interface a to be the power interface and controls the power supply control circuit 16 to transmit the first power signal output by the power adapter connected to the interface a to the interface B to supply power to the second external device. Similarly, when the control circuit 13 determines that the interface a is reversely inserted into the first external device and the first external device sends a first power signal, the control circuit generates a second sub-gating control signal of the first level to control the second gating switching unit 142 to gate and output the first reverse connection data signal sent by the first external device to the signal distribution circuit 15 for distribution and then output, and controls the interface B to be switched to be the power interface, and controls the power supply control circuit 16 to transmit the second power signal accessed by the interface B to the interface a to supply power to the first external device; when the control circuit 13 determines that the interface B is reversely plugged into the second external device and the second external device sends a second power signal, the second sub-gating control signal with the second level is generated to control the second gating switching unit 142 to gate and output the second reverse data signal sent by the second external device to the signal distribution circuit 15 for distribution and then output, and at the same time, the interface a is controlled to be switched to be the power interface, and the power supply control circuit 16 is controlled to transmit the first power signal accessed by the interface a to the interface B to supply power to the second external device. The data transmission method and the data transmission device have the advantages that when the double interfaces are subjected to blind plugging to access the external equipment, the positive connection data signal or the negative connection data signal transmitted by the gated output interface is controlled, the interface for transmitting the power signal or the interface for not transmitting the data signal is switched to be the power interface function, the external power equipment supplies power to the electric equipment accessed by the other interface, the interface functions are flexibly configured, the data transmission sensitivity and the responsiveness are high, and the data transmission efficiency is improved.
Referring to fig. 6, in one embodiment, the a interface is further configured to transmit a first USB signal sent by a first external device; the interface B is also configured to transmit a second USB signal sent by a second external device; the control circuit 13 is further configured to generate a USB strobe control signal according to the first detection signal and the second detection signal; the dual interface switching circuit further comprises: the USB signal gating circuit 17. And the USB signal gating circuit is connected with the two first interfaces 11 and the control circuit 13 and is configured to gate and output the USB signal transmitted by one first interface 11 of the two first interfaces 11 according to the USB gating control signal.
In a specific implementation, the USB signal gating circuit 17 is connected to the a interface, the B interface, and the control circuit 13, and can gate and output the USB signal transmitted by the a interface or the B interface according to the USB gating control signal. The interface A and the interface B can be used as a high-speed data transmission interface, such as a USB3.0 interface, and can also be used as a low-speed transmission interface, such as a USB2.0 interface. When the a interface and the B interface transmit data signals as a high-speed data transmission port, the control circuit 13 generates a gate control signal according to the first detection signal and the second detection signal to control the gate switch circuit 14 to gate and output the first data signal transmitted by the a interface or gate and output the second data signal transmitted by the B interface. When the interface a and the interface B are used as low-speed data transmission ports to transmit data signals, the control circuit 13 controls to gate and output a first USB signal transmitted from the interface a or a second USB signal transmitted from the interface B, and then outputs the first USB signal or the second USB signal to the lower-level USB signal application circuit through the USB interface, so as to meet the requirements of signal transmission and control application, and improve the practicability of the dual-interface switching circuit. Optionally, the USB signal gating circuit 17 includes a plurality of USB signal switches, and is capable of gating and outputting USB signals transmitted by the a interface and the B interface under the control of the control circuit 13.
Referring to fig. 7, in one embodiment, the dual interface switching circuit further includes: and an electrostatic protection circuit 18. And the electrostatic protection circuit 18 is connected with the two first interfaces 11 and the gating switch circuit 14 and is configured to perform electrostatic protection on the data transmitted by the two first interfaces 11. In a specific implementation, the electrostatic protection circuit 18 is connected to the a interface, the B interface, and the gate switch circuit 14. The first data signal transmitted by the interface a and the second data signal transmitted by the interface B can be subjected to electrostatic protection by the electrostatic protection circuit 18, so that the problems that circuit components are damaged and data signal transmission stability and accuracy are poor due to electrostatic interference when the interface a and the interface B are accessed to external equipment for signal transmission are solved. Optionally, the electrostatic protection circuit 18 employs a low power electrostatic protector.
Referring to fig. 8, in one embodiment, the dual interface switching circuit further includes: and a voltage conversion circuit 19. And a voltage conversion circuit 19 configured to generate a second direct current according to the first direct current to power the gate switch circuit 14 and the signal distribution circuit 15. In a specific implementation, the first direct current may be provided by a battery or a power adapter. The supply voltage required for the gate switching circuit 14 and the signal distribution circuit 15, etc. can be supplied by the voltage conversion circuit 19. The power supply of the gating switch circuit 14 and the signal distribution circuit 15 by an additional power supply is avoided, the small size of the double-interface switching circuit is guaranteed, and the cost is saved.
Referring to fig. 9, in one embodiment, the dual interface switching circuit further includes: a USB to serial circuit 20. And the USB-to-serial port circuit 20 is connected with the two first interfaces 11 and the control circuit 13 and is configured to convert the USB signals into serial port signals to be output to the control circuit 13. In specific implementation, the USB-to-serial port circuit 20 is connected to the interface a and the interface B, and can convert USB signals output by the interface a and the interface B into serial port signals and output the serial port signals to the control circuit 13, so as to update and upgrade programs of the control circuit 13 through the first interface 11, thereby meeting requirements of specific applications, avoiding the need of entirely replacing the dual-interface switching circuit and the corresponding printed circuit board when the application requirements are upgraded, and saving hardware replacement cost.
Referring to fig. 10, in one embodiment, the first detection circuit 121 includes: a first resistor R1, a second resistor R2, a third resistor R3 and a first field effect transistor Q1; the first end of the first resistor R1 is connected with the interface A, the second end of the first resistor R1 is connected with the first end of the third resistor R3 and the grid of the first field-effect tube Q1, the second end of the third resistor R3 and the source of the first field-effect tube Q1 are connected with the power ground, the drain of the first field-effect tube Q1 is connected with the first end of the second resistor R2, and the second end of the second resistor R2 is connected with the first direct-current end. In specific implementation, the first direct current end outputs a first direct current, and the voltage of the selectable first direct current is VCC _ 5.0V. The first field effect transistor Q1 is an N-type MOS transistor. The first end of the first resistor R1 is connected to the interface a, when the first end of the first resistor R1 is connected to the first power signal transmitted by the interface a, the first fet Q1 is turned on according to the first power signal, the first detection signal at a low level is output to the drain of the first fet Q1 and output to the control circuit 13, and the control circuit 13 determines, according to the first detection signal at a low level, that the first external device connected to the interface a is a power device, and switches the interface a to the function of the power interface. It can be understood that when the first external device connected to the a interface is a terminal device (e.g. a computer) instead of a power supply device or is not connected to an external device, the first fet Q1 remains off, and the drain of the first fet Q1 assumes a high state, and the a interface can be used as a data transmission interface.
In one embodiment, referring to fig. 10, the second detection circuit 122 includes a resistor R4, a resistor R5, a resistor R6, and a second fet Q2. In a specific implementation, the second field effect transistor Q2 is an N-type MOS transistor. As can be seen from the operation principle of the first detection circuit 121, when the power adapter is connected to the B interface, the second detection circuit 122 generates a low-level second detection signal at the drain of the second fet Q2 and outputs the low-level second detection signal to the control circuit 13, and the control circuit 13 can determine, based on the low-level second detection signal, that the type of the second external device connected to the B interface is the power device, thereby switching the B interface to the power interface function.
In one embodiment, referring to fig. 10, the control circuit 13 includes: and a USB communication control chip U4. Optionally, the USB communication control chip U4 adopts an LDR6282 chip, which has a double Type-C port DRP and USB PD3.0 control function, supports a standard USB PD3.0/QC2.0/QC3.0 protocol, and manages protocol negotiation of two Type-C interfaces through a device management layer, so that it is possible to implement either first connecting a host and then connecting an adapter, or vice versa; and the port power supply detection can be carried out, and the requirements of power amplification control, power switch control, data switch control or other control applications can be met.
Referring to fig. 11, in one embodiment, the first gating switching unit 141 includes: the first multi-way switch chip U1, a fourth resistor R12, a fifth resistor R13, a sixth resistor R14 and a first capacitor C7; the high-speed positive signal terminal B0p of the first multi-way switch chip U1 at the B port first channel, the high-speed negative signal terminal B0n of the first multi-way switch chip U1 at the B port first channel, the high-speed positive signal terminal B1p of the first multi-way switch chip U1 at the B port and the high-speed negative signal terminal B1n of the first multi-way switch chip U1 at the B interface, the high-speed positive signal terminal C0p of the first multi-way switch chip U1 at the C port first channel, the high-speed negative signal terminal C0n of the first multi-way switch chip U59629 at the C port, the high-speed positive signal terminal C1p of the first multi-way switch chip U1 at the C port second channel and the high-speed negative signal terminal C1n of the first multi-way switch chip U1 at the C port first channel, the high-speed positive signal terminal A p of the first multi-way switch chip U6327 at the A port U1 at the first multi-way switch chip U n at the A port, and the B port 3638 at the A signal terminal B port, The A port second channel high-speed positive signal terminal A1p of the first multi-way switch chip U1 and the A port second channel high-speed negative signal terminal A1n of the first multi-way switch chip U1 are connected to the signal distribution circuit 15 in common; the ground terminal GND of the first multi-way switch chip U1 is connected to the power ground, the port selection terminal SEL of the first multi-way switch chip U1 is connected to the first terminal of the fourth resistor R12 and the control circuit 13, the first terminal of the fourth resistor R12 is connected to the second dc terminal, the enable terminal OEn of the first multi-way switch chip U1 is connected to the first terminal of the fifth resistor R13, the second terminal of the fifth resistor R13 is connected to the power ground, the power terminal VCC of the first multi-way switch chip U1 is connected to the first terminal of the sixth resistor R14 and the first terminal of the first capacitor C7, the second terminal of the sixth resistor R14 is connected to the second dc terminal, and the second terminal of the first capacitor C7 is connected to the power ground.
In specific implementation, the second direct current terminal outputs a second direct current, and the voltage of the optional second direct current is VCC _ 3.3V. The B-port first-channel high-speed positive signal terminal B0p of the first multi-way switch chip U1, the B-port first-channel high-speed negative signal terminal B0n of the first multi-way switch chip U1, the B-port second-channel high-speed positive signal terminal B1p of the first multi-way switch chip U1, and the B-port second-channel high-speed negative signal terminal B1n of the first multi-way switch chip U1 form a second positive data signal input terminal of the first gating switch unit 141. The C-port first-channel high-speed positive signal terminal C0p of the first multi-way switch chip U1, the C-port first-channel high-speed negative signal terminal C0n of the first multi-way switch chip U1, the C-port second-channel high-speed positive signal terminal C1p of the first multi-way switch chip U1, and the C-port second-channel high-speed negative signal terminal C1n of the first multi-way switch chip U1 are commonly configured as a first positive data signal input terminal of the first gating switch unit 141. The port selection terminal SEL of the first multi-way switch chip U1 is a first sub-gate control signal input terminal of the first gate switch unit 141, and is configured to receive the first sub-gate control signal output by the control circuit 13. For example, when the a interface is connected to a computer and the B interface is connected to a power adapter, the a port first channel high-speed positive signal terminal A0p of the first multi-way switch chip U1, the a port first channel high-speed negative signal terminal A0n of the first multi-way switch chip U1, the a port second channel high-speed positive signal terminal A1p of the first multi-way switch chip U1 and the a port second channel high-speed negative signal terminal A1n of the first multi-way switch chip U1 output a first positive data signal; otherwise, the second positive data signal is output.
In an implementation, referring to fig. 11, the second gating switch unit 142 includes a second multi-way switch chip U2, a resistor R15, a resistor R16, a resistor R17, and a capacitor C8. The circuit structure and the operation principle of the second gate switching unit 142 are the same as those of the first gate switching unit 141, so that one of the first reverse connection data signal transmitted from the a interface and the second reverse connection output signal transmitted from the B interface can be gated by the second multi-way switching chip U2 in the second gate switching unit 142 according to the second sub-gate control signal output from the control circuit 13.
In one embodiment, referring to fig. 11, the signal distribution circuit 15 includes a data selector U3, which can selectively distribute and output the input data to the corresponding subsequent application circuit module.
Referring to fig. 12, in one embodiment, the power control circuit 16 includes: a first switching unit 161, a second switching unit 162, and a voltage detecting unit 163. A first switch unit 161, connected to the first interface and control circuit 13, and configured to connect the power signal output by the first interface 11 to the second first interface 11 according to the power supply control signal; the second switch unit 162 is connected to the second first interface 11 and the control circuit 13, and configured to connect the power signal output by the second first interface 11 to the first interface 11 according to the power supply control signal; the voltage detection unit 163 is connected to the first switch unit 161, the second switch unit 162, and the control circuit 13, and configured to detect an input power signal to generate a voltage sampling signal.
In a specific implementation, the first interface 11 is an interface a, the second first interface 11 is an interface B, and the first switch unit 161 is connected to the interface a and the control circuit 13, and communicates a power supply signal output by the interface a to the interface B according to the first sub-power supply control signal; the second switch unit 162 is connected with the interface B and the control circuit 13, and is used for communicating a power supply signal output by the interface B to the interface a according to the second sub-power supply control signal; the voltage detection unit 163 is connected to the first switch unit 161, the second switch unit 162, and the control circuit 13, and detects the input power supply signal to generate a voltage sampling signal. The control circuit 13 converts the interface protocol voltage according to the voltage sampling signal. The power supply control signal comprises a first sub power supply control signal and a second sub power supply control signal. The first switch unit 161 and the second switch unit 162 can effectively turn on the first power signal accessed by the interface a to the interface B, so as to supply power to the terminal equipment (such as a computer) accessed by the interface B, and turn off the interface B and output the second power signal accessed by mistake to the interface a; and effectively conducting the second power signal output by the interface B to the interface A so as to supply power to terminal equipment (such as a computer) accessed by the interface A, turning off the interface A, and simultaneously transmitting the first power signal which is accessed by mistake to the interface B, thereby realizing the conducting output and reverse-filling protection of the power signal, and further improving the safety and reliability of the double-interface blind-plugging signal switching circuit.
Referring to fig. 13, in one embodiment, the first switch unit 161 includes: a seventh resistor R01, an eighth resistor R02, a first diode D1 and a third FET Q3; a first end of the seventh resistor R01 is connected to the base of the third fet Q3, a drain of the third fet Q3 and an anode of the first diode D1 are connected to the interface a in common, a cathode of the first diode D1, a source of the third fet Q3 and a first end of the eighth resistor R02 are connected to the voltage detection unit 163 in common, and a second end of the seventh resistor R01 and a second end of the eighth resistor R02 are connected to the control circuit 13 in common. In a specific implementation, the third fet Q3 is a P-type MOS transistor, which can be turned on according to a low-level signal and turned off according to a high-level signal. In one embodiment, referring to fig. 13, the second switch unit 162 has the same circuit structure as the first switch unit 161. In combination with the forward-direction on/off characteristics of the first diode D1 and the second diode D2, when the first power signal output from the interface a needs to be transmitted to the interface B, the control circuit 13 outputs the first sub power supply control signal to control the third fet Q3 to be turned off, and outputs the second sub power supply control signal to control the fourth fet Q4 to be turned on, so that the first power signal output from the interface a is transmitted to the interface B, and the second power signal output from the interface B is turned off to prevent the second power signal output from the interface B from flowing backwards to the interface a. When the second power signal output by the interface B needs to be transmitted to the interface a, the control circuit 13 outputs the first sub power supply control signal to control the third fet Q3 to be turned on, and the control circuit 13 simultaneously outputs the second sub power supply control signal to control the fourth fet Q4 to be turned off, so that the second power signal output by the interface B is transmitted to the interface a, and the first power signal output by the interface a is turned off to prevent the first power signal output by the interface a from flowing back to the interface B.
In a second aspect of the present application, referring to fig. 14, fig. 14 shows a schematic structural diagram of a Type-C hub, where the Type-C hub includes a dual-interface switching circuit and a second interface 101 as described in any one of the above items. The second interface 101 is connected to the dual-interface switching circuit, and is configured to transmit a USB signal. In specific implementation, optionally, the second interface 101 is a USB interface, and can transmit a low-speed USB2.0 signal output by the Type-C interface.
Referring to FIG. 14, in one embodiment, the Type-C hub further includes a third interface 102. And a third interface 102, connected to the dual-interface switching circuit, for transmitting the data signal distributed and output by the signal distribution circuit 15. Optionally, the third interface 102 is an HDMI interface, and can transmit an audio/video data signal sent by an external device accessed by the Type-C interface. Can realize two Type-C interface blind plugs to can automatic accurate discernment interface access device's Type, thereby automatic switch-over data signal transmission path, nimble configuration Type-C interface function, guarantee and improved Type-C concentrator data transmission efficiency, promoted the expansibility and the practicality of Type-C concentrator function.
The above are merely alternative embodiments of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement or the like made within the spirit and principle of the present application shall be included in the scope of the claims of the present application.
Claims (16)
1. A dual interface switching circuit, comprising:
two first interfaces;
the detection circuit is connected with each first interface and is configured to generate a corresponding detection signal when the first interface is connected to external equipment;
the control circuit is respectively connected with the two first interfaces and the detection circuit, and is configured to transmit the power signal to the other first interface for output when the power signal is determined to be accessed to the corresponding first interface according to the detection signal, wherein the other first interface is an interface for transmitting a data signal;
the control circuit is further configured to switch another first interface to be an interface for transmitting a power signal when it is determined that the corresponding first interface is accessed by a data signal according to the detection signal.
2. The dual interface switching circuit of claim 1, wherein the detection circuit comprises:
the first detection circuit is connected with one of the first interfaces and the control circuit and is configured to generate a first detection signal when the first interface is connected with a first power supply signal sent by first external equipment;
and the second detection circuit is connected with the other first interface and the control circuit and is configured to generate a second detection signal when the first interface is connected with a second power supply signal sent by a second external device.
3. The dual interface switching circuit of claim 2, wherein the control circuit is further configured to generate a gating control signal based on the first detection signal and the second detection signal, the dual interface switching circuit further comprising:
and the gating switch circuit is connected with the two first interfaces and the control circuit and is configured to gate and output the data signal transmitted by one of the first interfaces according to the gating control signal.
4. The dual interface switching circuit of claim 3, wherein the control circuit is further configured to generate a distribution enable signal based on the first detection signal and the second detection signal; the dual interface switching circuit further comprises:
and the signal distribution circuit is connected with the gating switch circuit and the control circuit and is configured to distribute and output the data signals gated and output by the gating switch circuit according to the distribution enabling signals.
5. The dual interface switching circuit of claim 2, wherein the control circuit is further configured to generate a power supply control signal as a function of the first detection signal and the second detection signal; the dual interface switching circuit further comprises:
and the power supply control circuit is connected with the two first interfaces and the control circuit and is configured to control the connection and disconnection between the first power supply signal and the two first interfaces and between the second power supply signal and the two first interfaces according to the power supply control signal.
6. The dual interface switching circuit of claim 3, wherein the gating switch circuit comprises:
the first gating switch unit is connected with the two first interfaces and the control circuit and is configured to gate and output a positive data signal transmitted by one of the two first interfaces according to a first sub-gating control signal;
the second gating switch unit is connected with the two first interfaces and the control circuit and is configured to gate and output a reverse connection data signal transmitted by one of the two first interfaces according to a second sub-gating control signal;
wherein the gate control signal includes the first sub-gate control signal and the second sub-gate control signal.
7. The dual interface switching circuit of claim 2, wherein both of the first interfaces are further configured to transmit USB signals, the control circuit further configured to generate a USB strobe control signal based on the first detection signal and the second detection signal;
the dual interface switching circuit further comprises:
and the USB signal gating circuit is connected with the two first interfaces and the control circuit and is configured to gate and output the USB signal transmitted by one of the two first interfaces according to a USB gating control signal.
8. The dual interface switching circuit of claim 3, wherein the dual interface switching circuit further comprises:
and the electrostatic protection circuit is connected with the two first interfaces and the gating switch circuit and is configured to perform electrostatic protection on the data transmitted by the two first interfaces.
9. The dual interface switching circuit of claim 4, wherein the dual interface switching circuit further comprises:
and the voltage conversion circuit is connected with the gating switch circuit and the signal distribution circuit and is configured to generate second direct current according to the first direct current so as to supply power to the gating switch circuit and the signal distribution circuit.
10. The dual interface switching circuit of claim 2, wherein the dual interface switching circuit further comprises:
and the USB-to-serial port circuit is connected with the two first interfaces and the control circuit and is configured to convert USB signals into serial port signals to be output to the control circuit.
11. The dual interface switching circuit of claim 2, wherein the first detection circuit comprises: the circuit comprises a first resistor, a second resistor, a third resistor and a first field effect transistor; wherein the content of the first and second substances,
the first end of the first resistor is connected with the first interface circuit, the second end of the first resistor is connected with the first end of the third resistor and the grid electrode of the first field effect transistor, the second end of the third resistor and the source electrode of the first field effect transistor are connected with a power ground, the drain electrode of the first field effect transistor is connected with the first end of the second resistor, and the second end of the second resistor is connected with the first direct current end.
12. The dual interface switching circuit of claim 6, wherein the first gating switching unit comprises: the first multi-way switch chip, the fourth resistor, the fifth resistor, the sixth resistor and the first capacitor; wherein the content of the first and second substances,
the high-speed positive signal end of the first channel of the B port of the first multi-way switch chip, the high-speed negative signal end of the first channel of the B port of the first multi-way switch chip, the high-speed positive signal end of the second channel of the B port of the first multi-way switch chip and the high-speed negative signal end of the second channel of the B port of the first multi-way switch chip are connected with the first interface circuit, the high-speed positive signal end of the first channel of the C port of the first multi-way switch chip, the high-speed negative signal end of the first channel of the C port of the first multi-way switch chip, the high-speed positive signal end of the second channel of the C port of the first multi-way switch chip and the high-speed negative signal end of the second channel of the C port of the first multi-way switch chip are connected with the first interface circuit, the high-speed positive signal end of the first channel of the A port of the first multi-way switch chip, the high-speed negative, The high-speed positive signal end of the second channel of the port A of the first multi-way switch chip and the high-speed negative signal end of the second channel of the port A of the first multi-way switch chip are connected to the signal distribution circuit in common;
the grounding end of the first multi-way switch chip is connected with a power ground, the port selection end of the first multi-way switch chip is connected with the first end of the fourth resistor and the control circuit, the first end of the fourth resistor is connected with the second direct-current end, the enabling end of the first multi-way switch chip is connected with the first end of the fifth resistor, the second end of the fifth resistor is connected with the power ground, the power end of the first multi-way switch chip is connected with the first end of the sixth resistor and the first end of the first capacitor, the second end of the sixth resistor is connected with the second direct-current end, and the second end of the first capacitor is connected with the power ground.
13. The dual interface switching circuit of claim 5, wherein the power supply control circuit comprises:
the first switch unit is connected with a first one of the first interfaces and is configured to communicate a power supply signal output by the first one of the first interfaces to a second one of the first interfaces according to the power supply control signal;
the second switch unit is connected with the second first interface and is configured to communicate a power supply signal output by the second first interface to the first interface according to the power supply control signal;
a voltage detection unit connected to an input power signal, the first switch unit, the second switch unit, and the control circuit, and configured to detect the input power signal to generate a voltage sampling signal.
14. The dual interface switching circuit of claim 13, wherein the first switching unit comprises: the device comprises a seventh resistor, an eighth resistor, a first diode and a third field effect transistor; the first end of the seventh resistor is connected with the base of the third field effect transistor, the drain of the third field effect transistor and the anode of the first diode are connected to the first interface in common, the cathode of the first diode, the source of the third field effect transistor and the first end of the eighth resistor are connected to the voltage detection unit in common, and the second end of the seventh resistor and the second end of the eighth resistor are connected to the control circuit in common.
15. A Type-C hub, characterized in that it comprises a dual interface switching circuit according to any one of claims 1 to 14; and the second interface is connected with the double-interface switching circuit and is used for transmitting USB signals.
16. The Type-C hub of claim 15, wherein the Type-C hub further comprises:
and the third interface is connected with the double-interface switching circuit and used for outputting the data signals distributed and output by the signal distribution circuit.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| PCT/CN2020/097469 WO2021258255A1 (en) | 2020-06-22 | 2020-06-22 | Dual-interface switch circuit and type-c hub |
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| CN112088472A true CN112088472A (en) | 2020-12-15 |
| CN112088472B CN112088472B (en) | 2022-04-26 |
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| CN202080001039.9A Active CN112088472B (en) | 2020-06-22 | 2020-06-22 | Double-interface switching circuit and Type-C concentrator |
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| WO (1) | WO2021258255A1 (en) |
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| WO2021258255A1 (en) | 2021-12-30 |
| CN112088472B (en) | 2022-04-26 |
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