Circuit for Type-C interface to identify OTG (On-The-Go) equipment

Abstract

The utility model provides a circuit for a Type-C interface to identify an OTG device, comprising an OTG device access trigger circuit and an OTG device identification feedback circuit, the input end of the OTG device access trigger circuit is connected with the Type-C interface of an intelligent electronic device, the Type-C interface of the intelligent electronic device can access the OTG device, and the Type-C interface of the intelligent electronic device is connected with the OTG device identification feedback circuit. The input end of the OTG equipment access trigger circuit is further connected with a 1.8 V power supply, the output end of the OTG equipment access trigger circuit is connected with the input end of the OTG equipment identification feedback circuit, and the output end of the OTG equipment identification feedback circuit is connected with a central processing unit of the intelligent electronic equipment. The Type-C interface OTG equipment identification circuit has the beneficial effects that the function that the Type-C interface identifies the OTG equipment can be realized, the circuit is simple, and the cost is low.

Description

Technical Field

[0001] The utility model relates to the technical field of circuits, and in particular to a circuit for a Type-C interface to identify an OTG device. Background Art

[0002] Type-C is a USB interface that can be inserted from either side. It is approximately 8.3mm x 2.5mm in size and supports USB standard charging, data transmission, display output and other functions like other interfaces. Type-C was developed by the USB Implementers Forum and became popular in 2014 after gaining support from Apple, Google, Intel, Microsoft and other manufacturers.

[0003] OTG is a supplementary standard of USB 2.0 specification. It can transform USB devices from USB peripherals into USB hosts, and then connect and communicate with other USB devices. The popularity of OTG has improved the inconvenience caused by the data exchange between various connectors of different standards between devices such as digital cameras, camcorders, printers, and up to 7 standards of memory cards.

[0004] Many smart electronic devices, such as tablets or smart phones, are generally equipped with standard Type-C interfaces for charging or data communication of smart electronic devices. However, the Type-C interface is generally unable to identify OTG devices, such as mice, keyboards, USB flash drives or other OTG devices. Sometimes people have this need and need the Type-C interface to be able to identify OTG devices. At present, if the Type-C interface is required to be able to identify OTG devices, it is necessary to add various conversion or identification chips between the Type-C interface and the central processor of the smart electronic device. However, this method will lead to higher production costs for the product and affect the competitiveness of the product. Utility Model Content

[0005] In order to solve the problems in the prior art, the utility model provides a circuit for Type-C interface to identify OTG devices. By setting an OTG device access trigger circuit and an OTG device identification feedback circuit that cooperate with each other in the circuit for Type-C interface to identify OTG devices, the function of Type-C interface to identify OTG devices can be realized. The circuit is simple and the cost is low, which solves the problem in the prior art that the Type-C interface of smart electronic devices cannot identify OTG devices.

[0006] The utility model provides a circuit for Type-C interface identification of OTG devices, which is arranged between the Type-C interface of an intelligent electronic device and a central processor of the intelligent electronic device, and comprises an OTG device access trigger circuit and an OTG device identification feedback circuit, wherein the input end of the OTG device access trigger circuit is connected to the Type-C interface of the intelligent electronic device, the Type-C interface of the intelligent electronic device can access the OTG device, the input end of the OTG device access trigger circuit is also connected to a 1.8V power supply, the output end of the OTG device access trigger circuit is connected to the input end of the OTG device identification feedback circuit, the output end of the OTG device identification feedback circuit is connected to the central processor of the intelligent electronic device, and the OTG device access trigger circuit can trigger information transmission to the OTG device identification feedback circuit and feedback to the central processor of the intelligent electronic device when the Type-C interface of the intelligent electronic device is connected to the OTG device.

[0007] The utility model is further improved, the OTG device access trigger circuit is provided with a field effect tube Q1602, a resistor R1608, a resistor R1605, a resistor R1606, a resistor R1611 and a capacitor C1610, wherein the gate of the field effect tube Q1602 is connected to one end of the resistor R1606 and one end of the capacitor C1610, the other end of the resistor R1606 is connected to one end of the resistor R1605 and the Type-C interface of the intelligent electronic device, the drain of the field effect tube Q1602 is connected to the other end of the capacitor C1610, the other end of the resistor R1605, and one end of the resistor R1608, the other end of the resistor R1608 is connected to the 1.8V power supply, the source of the field effect tube Q1602 is connected to one end of the resistor R1611 and the input end of the OTG device identification feedback circuit, and the other end of the resistor R1611 is grounded.

[0008] The utility model is further improved, the OTG device access trigger circuit is also provided with a resistor R1607 and a capacitor C1609, wherein one end of the resistor R1607 is connected to one end of the capacitor C1609, the other end of the resistor R1606, one end of the resistor R1605, and the Type-C interface of the smart electronic device, and the other end of the resistor R1607 and the other end of the capacitor C1609 are grounded.

[0009] The utility model is further improved, the OTG device identification feedback circuit is provided with a field effect tube Q1601, a resistor R1610, a resistor R1609 and a capacitor C1611, wherein the gate of the field effect tube Q1601 is connected to one end of the resistor R1610 and one end of the capacitor C1611, the other end of the resistor R1610 is connected to the source of the field effect tube Q1602 and one end of the resistor R1611, the drain of the field effect tube Q1601 is connected to one end of the resistor R1609 and a central processor of the intelligent electronic device, the other end of the resistor R1609 is connected to the 1.8V power supply, and the source of the field effect tube Q1601 and the other end of the capacitor C1611 are grounded.

[0010] The utility model is further improved in that the field effect tube Q1602 is a P-type MOS tube.

[0011] The utility model is further improved, the resistance value of the resistor R1608 is 0Ω, the resistance value of the resistor R1605 is 4.3KΩ, the resistance value of the resistor R1606 is 10KΩ, the resistance value of the resistor R1611 is 1KΩ, and the capacitance value of the capacitor C1610 is 1μF.

[0012] The utility model is further improved in that the resistance value of the resistor R1609 is 47KΩ, the resistance value of the resistor R1610 is 1KΩ, and the capacitance value of the capacitor C1611 is 100nF.

[0013] Compared with the prior art, the beneficial effects of the utility model are: providing a circuit for Type-C interface to identify OTG devices, by setting an OTG device access trigger circuit and an OTG device identification feedback circuit that cooperate with each other in the circuit for Type-C interface to identify OTG devices, the OTG device access trigger circuit can trigger information transmission to the OTG device identification feedback circuit and feedback to the central processor of the intelligent electronic device when the Type-C interface of the intelligent electronic device is connected to the OTG device, thereby realizing the function of Type-C interface to identify OTG devices, the circuit is simple and the cost is low, which can not only meet people's needs for Type-C interface to identify OTG devices, but also can not increase much production cost, thereby greatly improving the competitiveness of the product and solving the problem that the Type-C interface of the intelligent electronic device cannot identify the OTG device in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 This is a circuit diagram of the utility model for a Type-C interface to identify an OTG device. DETAILED DESCRIPTION

[0016] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of the present utility model; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit the present utility model; the terms "including" and "having" and any variations thereof in the specification and claims of the present utility model and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of the present utility model or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order.

[0017] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0018] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the accompanying drawings.

[0019] like Figure 1As shown, the utility model provides a circuit for Type-C interface identification of OTG devices, which is arranged between the Type-C interface of the intelligent electronic device and the central processor of the intelligent electronic device, including an OTG device access trigger circuit and an OTG device identification feedback circuit, the input end of the OTG device access trigger circuit is connected to the Type-C interface of the intelligent electronic device, the Type-C interface of the intelligent electronic device can access the OTG device, the input end of the OTG device access trigger circuit is also connected to a 1.8V power supply, the output end of the OTG device access trigger circuit is connected to the input end of the OTG device identification feedback circuit, and the output end of the OTG device identification feedback circuit is connected to the central processor of the intelligent electronic device. In this embodiment, the OTG device access trigger circuit can trigger information transmission to the OTG device identification feedback circuit and feedback to the central processor of the intelligent electronic device when the Type-C interface of the intelligent electronic device is connected to the OTG device, and can realize the function of the Type-C interface identifying the OTG device, the circuit is simple, the cost is low, and it can meet people's needs for the Type-C interface to identify the OTG device, and it can not only increase the production cost, but also greatly improve the competitiveness of the product.

[0020] like Figure 1As shown, the OTG device access trigger circuit is provided with a field effect transistor Q1602, a resistor R1608, a resistor R1605, a resistor R1606, a resistor R1611 and a capacitor C1610, the gate of the field effect transistor Q1602 is connected to one end of the resistor R1606 and one end of the capacitor C1610, the other end of the resistor R1606 is connected to one end of the resistor R1605 and the Type-C interface of the smart electronic device, the drain of the field effect transistor Q1602 is connected to the other end of the capacitor C1610 and the other end of the resistor R1605 , one end of the resistor R1608 is connected, the other end of the resistor R1608 is connected to the 1.8V power supply, the source of the field effect transistor Q1602 is connected to one end of the resistor R1611 and the input end of the OTG device identification feedback circuit, and the other end of the resistor R1611 is grounded; one end of the resistor R1607 is connected to one end of the capacitor C1609, the other end of the resistor R1606, one end of the resistor R1605, and the Type-C interface of the smart electronic device, and the other end of the resistor R1607 and the other end of the capacitor C1609 are connected The OTG device identification feedback circuit is provided with a field effect transistor Q1601, a resistor R1610, a resistor R1609 and a capacitor C1611, wherein the gate of the field effect transistor Q1601 is connected to one end of the resistor R1610 and one end of the capacitor C1611, the other end of the resistor R1610 is connected to the source of the field effect transistor Q1602 and one end of the resistor R1611, the drain of the field effect transistor Q1601 is connected to one end of the resistor R1609 and the central processor of the intelligent electronic device, and the other end of the resistor R1609 is connected to 1. 8V power supply is connected, the source of field effect transistor Q1601 and the other end of capacitor C1611 are grounded; wherein, field effect transistor Q1602 is a P-type MOS tube, the resistance value of resistor R1608 is 0Ω, the resistance value of resistor R1605 is 4.3KΩ, the resistance value of resistor R1606 is 10KΩ, the resistance value of resistor R1611 is 1KΩ, the capacitance value of capacitor C1610 is 1μF, the resistance value of resistor R1609 is 47KΩ, the resistance value of resistor R1610 is 1KΩ, and the capacitance value of capacitor C1611 is 100nF. In this embodiment, when the Type-C interface of the intelligent electronic device is connected to the OTG device, the Type-C interface of the intelligent electronic device is grounded, the voltage across the resistor R1606 is 0V, the drain and source of the field effect transistor Q1602 are turned on, the voltage across the resistor R1610 is 1.8V, the drain and source of the field effect transistor Q1601 are turned on, the drain of the field effect transistor Q1601 is grounded, and a 0V level signal is output and fed back to the central processor of the intelligent electronic device, thereby identifying that the Type-C interface is connected to the OTG device.

[0021] As can be seen from the above, the utility model provides a circuit for Type-C interface to identify OTG devices. By arranging an OTG device access trigger circuit and an OTG device identification feedback circuit that cooperate with each other in the circuit for Type-C interface to identify OTG devices, the OTG device access trigger circuit can trigger information transmission to the OTG device identification feedback circuit and feedback to the central processor of the intelligent electronic device when the Type-C interface of the intelligent electronic device is connected to the OTG device, thereby realizing the function of Type-C interface to identify OTG devices. The circuit is simple and low in cost, which can meet people's needs for Type-C interface to identify OTG devices without increasing production costs much, thereby greatly improving the competitiveness of the product and solving the problem in the prior art that the Type-C interface of the intelligent electronic device cannot identify the OTG device.

[0022] The specific implementation methods described above are preferred implementation methods of the present utility model, and are not intended to limit the specific implementation scope of the present utility model. The scope of the present utility model includes but is not limited to the specific implementation methods. All equivalent changes made in accordance with the present utility model are within the protection scope of the present utility model.

Claims

1. A circuit for identifying an OTG device via a Type-C interface, arranged between the Type-C interface of an intelligent electronic device and a central processor of the intelligent electronic device, characterized in that: It includes an OTG device access trigger circuit and an OTG device identification feedback circuit. The input end of the OTG device access trigger circuit is connected to the Type-C interface of the intelligent electronic device. The Type-C interface of the intelligent electronic device can access the OTG device. The input end of the OTG device access trigger circuit is also connected to a 1.8V power supply. The output end of the OTG device access trigger circuit is connected to the input end of the OTG device identification feedback circuit. The output end of the OTG device identification feedback circuit is connected to the central processing unit of the intelligent electronic device. The OTG device access trigger circuit can trigger information to be transmitted to the OTG device identification feedback circuit and fed back to the central processing unit of the intelligent electronic device when the Type-C interface of the intelligent electronic device is connected to the OTG device.

2. The circuit for Type-C interface identification of OTG device according to claim 1, characterized in that: The OTG device access trigger circuit is provided with a field effect tube Q1602, a resistor R1608, a resistor R1605, a resistor R1606, a resistor R1611 and a capacitor C1610, wherein the gate of the field effect tube Q1602 is connected to one end of the resistor R1606 and one end of the capacitor C1610, the other end of the resistor R1606 is connected to one end of the resistor R1605 and the Type-C interface of the intelligent electronic device, the drain of the field effect tube Q1602 is connected to the other end of the capacitor C1610, the other end of the resistor R1605, and one end of the resistor R1608, the other end of the resistor R1608 is connected to the 1.8V power supply, the source of the field effect tube Q1602 is connected to one end of the resistor R1611 and the input end of the OTG device identification feedback circuit, and the other end of the resistor R1611 is grounded.

3. The circuit for Type-C interface identification of OTG device according to claim 2, characterized in that: The OTG device access trigger circuit is also provided with a resistor R1607 and a capacitor C1609, wherein one end of the resistor R1607 is connected to one end of the capacitor C1609, the other end of the resistor R1606, one end of the resistor R1605, and the Type-C interface of the smart electronic device, and the other end of the resistor R1607 and the other end of the capacitor C1609 are grounded.

4. The circuit for Type-C interface identification of OTG device according to claim 3, characterized in that: The OTG device identification feedback circuit is provided with a field effect transistor Q1601, a resistor R1610, a resistor R1609 and a capacitor C1611, wherein the gate of the field effect transistor Q1601 is connected to one end of the resistor R1610 and one end of the capacitor C1611, the other end of the resistor R1610 is connected to the source of the field effect transistor Q1602 and one end of the resistor R1611, the drain of the field effect transistor Q1601 is connected to one end of the resistor R1609 and a central processor of an intelligent electronic device, the other end of the resistor R1609 is connected to the 1.8V power supply, and the source of the field effect transistor Q1601 and the other end of the capacitor C1611 are grounded.

5. The circuit for Type-C interface identification of OTG device according to claim 4, characterized in that: The field effect transistor Q1602 is a P-type MOS tube.

6. The circuit for Type-C interface identification of OTG device according to claim 5, characterized in that: The resistance value of the resistor R1608 is 0Ω, the resistance value of the resistor R1605 is 4.3KΩ, the resistance value of the resistor R1606 is 10KΩ, the resistance value of the resistor R1611 is 1KΩ, and the capacitance value of the capacitor C1610 is 1μF.

7. The circuit for Type-C interface identification of OTG device according to claim 6, characterized in that: The resistance value of the resistor R1609 is 47KΩ, the resistance value of the resistor R1610 is 1KΩ, and the capacitance value of the capacitor C1611 is 100nF.

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