CN218974905U - Touch screen communication switching circuit - Google Patents
Touch screen communication switching circuit Download PDFInfo
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- CN218974905U CN218974905U CN202223546397.3U CN202223546397U CN218974905U CN 218974905 U CN218974905 U CN 218974905U CN 202223546397 U CN202223546397 U CN 202223546397U CN 218974905 U CN218974905 U CN 218974905U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
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Abstract
The utility model provides a touch screen communication switching circuit, which comprises: the MCU circuit is used for being connected with an IIC interface or a UART interface of the touch screen board through the board connector; the crystal oscillator circuit is connected with the MCU circuit; the voltage stabilizing circuit is connected with the MCU circuit; the USB interface circuit is connected with the MCU circuit; and the burning port circuit is connected with the MCU circuit. The MCU chip U3 converts the IIC interface or the UART interface of the touch screen board into a USB interface through the USB interface circuit, so that the original USB+IIC interface or USB+UART interface of the touch screen board can be converted into a double USB interface, a double USB scheme is not required to be designed on a public board, and the cost is reduced.
Description
Technical Field
The utility model relates to the technical field of touch screen circuits, in particular to a touch screen communication switching circuit.
Background
The common interface modes of the touch screen board card include IIC, USB, UART, such as IIC, USB, UART, USB +IIC, USB+UART, and the like, and part of the main boards only need to select one of the communication modes, so that 2 USB interfaces cannot appear on the common board card; while some motherboards are dual systems, which may require dual USB functionality, designing dual USB solutions on a common board increases the cost of the board, and therefore, in order to reduce the cost, a touch screen communication switching circuit is proposed.
Disclosure of Invention
The utility model provides a touch screen communication switching circuit which does not need to design a double USB scheme on a public board card so as to reduce cost.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a touch screen communication switching circuit comprising:
the MCU circuit is used for being connected with an IIC interface or a UART interface of the touch screen board through the board connector;
the crystal oscillator circuit is connected with the MCU circuit;
the voltage stabilizing circuit is connected with the MCU circuit;
the USB interface circuit is connected with the MCU circuit;
the burning port circuit is connected with the MCU circuit;
the MCU circuit comprises an MCU chip U3, a capacitor C12, a capacitor C16, a capacitor C17, a capacitor C21 and a capacitor C22, wherein a pin 9 of the MCU chip U3 is connected with the capacitor C12 which is grounded, a pin 10 of the MCU chip U3 is connected with the capacitor C17 which is grounded, a pin 6 of the MCU chip U3 is connected with the capacitor C21 which is grounded, a pin 25 of the MCU chip U3 is connected with the capacitor C16 which is grounded and then is connected with an external voltage end VDD3V, and a pin 7 of the MCU chip U3 is connected with the capacitor C22 which is grounded and then is connected with an external voltage end VDD3V;
the USB interface circuit comprises a USB interface J1, a diode TVS18, a diode TVS19, a resistor R1 and a resistor R2, wherein one end of the resistor R1 is connected with a pin 12 of the MCU chip U3, the other end of the resistor R1 is connected with a pin 3 of the USB interface J1 and the diode TVS19 which is grounded, one end of the resistor R2 is connected with a pin 11 of the MCU chip U3, the other end of the resistor R2 is connected with a pin 2 of the USB interface J1 and the diode TVS18 which is grounded, and the pin 1 of the USB interface J1 is connected with the diode TVS1 which is grounded.
In one embodiment of the disclosure, the crystal oscillator circuit includes a crystal oscillator X1, a capacitor C4 and a resistor R11, where a pin 1 of the crystal oscillator X1 is connected to one end of the capacitor C1, one end of the resistor R11 and a pin 30 of the MCU chip U3, a pin 4 of the crystal oscillator X1 is connected to the other end of the capacitor C1 and then grounded, a pin 3 of the crystal oscillator X1 is connected to one end of the capacitor C4, the other end of the resistor R11 and a pin 29 of the MCU chip U3, and a pin 2 of the crystal oscillator X1 is connected to the other end of the capacitor C4 and then grounded.
In one embodiment of the disclosure, the voltage stabilizing circuit includes a voltage stabilizing chip U1, a capacitor C2, a capacitor C5 and a capacitor C6, where a pin 1 and a pin 3 of the voltage stabilizing chip U1 are connected and then connected to a pin 1 of the USB interface J1, a pin 9 of the MCU chip U3 and the capacitor C2 grounded, a pin 2 of the voltage stabilizing chip U1 is grounded, a pin 4 of the voltage stabilizing chip U1 is connected to the capacitor C6 grounded, and a pin 5 of the voltage stabilizing chip U1 is connected to the capacitor C5 grounded and then used as a voltage terminal VDD3V.
In one embodiment of the disclosure, the writing circuit includes a writing port P1, a resistor R5, a resistor R8, a resistor R9, and a capacitor C20, where a pin 1 of the writing port P1 is externally connected to a voltage terminal VDD3V, a pin 2 of the writing port P1 is connected to one end of the resistor R8 and a pin 23 of the MCU chip U3, a pin 3 of the writing port P1 is connected to one end of the resistor R9 and a pin 24 of the MCU chip U3, a pin 4 of the writing port P1 is connected to one end of the resistor R5, a grounded capacitor C20 and a pin 31 of the MCU chip U3, and another end of the resistor R8 is externally connected to a voltage terminal VDD3V after being connected to another end of the resistor R9, and another end of the resistor R5 is externally connected to the voltage terminal VDD3V.
In summary, the utility model has at least the following advantages:
in the utility model, the required program can be programmed to the MCU chip U3 through the programming port circuit, the crystal oscillator circuit provides working frequency for the MCU chip U3, the voltage stabilizing circuit provides working voltage, the MCU chip U3 is connected with the IIC interface or the UART interface of the touch screen board through the board connector, the MCU chip U3 converts the IIC interface or the UART interface of the touch screen board into the USB interface through the USB interface circuit, the original USB+IIC interface or the USB+UART interface of the touch screen board can be converted into the double USB interface, the double USB scheme is not required to be designed on the public board, and the cost is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of an MCU circuit according to some embodiments of the present utility model.
FIG. 2 is a schematic diagram of pins of interface J3 when connected to a UART interface of a touch screen panel according to some embodiments of the present utility model.
Fig. 3 is a schematic diagram of pins of interface J2 when interfacing with the IIC of a touch screen panel according to some embodiments of the utility model.
Fig. 4 is a schematic diagram of a USB interface circuit according to some embodiments of the present utility model.
Fig. 5 is a schematic diagram of a crystal oscillator circuit according to some embodiments of the utility model.
Fig. 6 is a schematic diagram of a voltage stabilizing circuit according to some embodiments of the utility model.
Fig. 7 is a schematic diagram of a burn port circuit according to some embodiments of the utility model.
Detailed Description
Hereinafter, only certain exemplary embodiments are briefly described. As will be recognized by those of skill in the pertinent art, the described embodiments may be modified in numerous different ways without departing from the spirit or scope of the embodiments of the present utility model. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive.
In the description of the embodiments of the present utility model, it should be understood that the terms "length," "vertical," "horizontal," "top," "bottom," and the like indicate an orientation or a positional relationship based on that shown in the drawings, and are merely for convenience in describing the embodiments of the present utility model and to simplify the description, rather than to indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present utility model.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the embodiments of the present utility model, the meaning of "plurality" is two or more, unless explicitly defined otherwise.
In the embodiments of the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like are to be construed broadly and include, for example, either permanently connected, removably connected, or integrally formed; the device can be mechanically connected, electrically connected and communicated; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present utility model will be understood by those of ordinary skill in the art according to specific circumstances.
In embodiments of the utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, or may include both the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
The following disclosure provides many different implementations, or examples, for implementing different configurations of embodiments of the utility model. In order to simplify the disclosure of embodiments of the present utility model, components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit embodiments of the present utility model. Furthermore, embodiments of the present utility model may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed.
Embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1 to 7, the present embodiment provides a touch screen communication switching circuit, including:
the MCU circuit is used for being connected with an IIC interface or a UART interface of the touch screen board through the board connector;
the crystal oscillator circuit is connected with the MCU circuit;
the voltage stabilizing circuit is connected with the MCU circuit;
the USB interface circuit is connected with the MCU circuit;
the burning port circuit is connected with the MCU circuit;
as shown in fig. 1, the MCU circuit includes an MCU chip U3, a capacitor C12, a capacitor C16, a capacitor C17, a capacitor C21, and a capacitor C22, where a pin 9 of the MCU chip U3 is connected to the capacitor C12 that is grounded, a pin 10 of the MCU chip U3 is connected to the capacitor C17 that is grounded, a pin 6 of the MCU chip U3 is connected to the capacitor C21 that is grounded, a pin 25 of the MCU chip U3 is connected to the capacitor C16 that is grounded, and then an external voltage terminal VDD3V is connected, and a pin 7 of the MCU chip U3 is connected to the capacitor C22 that is grounded;
as shown in fig. 4, the USB interface circuit includes a USB interface J1, a diode TVS18, a diode TVS19, a resistor R1, and a resistor R2, one end of the resistor R1 is connected to a pin 12 of the MCU chip U3, the other end of the resistor R1 is connected to a pin 3 of the USB interface J1 and a grounded diode TVS19, one end of the resistor R2 is connected to a pin 11 of the MCU chip U3, the other end of the resistor R2 is connected to a pin 2 of the USB interface J1 and a grounded diode TVS18, and a pin 1 of the USB interface J1 is connected to a grounded diode TVS 1.
The MCU chip U3 performs filtering through a plurality of grounding capacitors, for example, a pin 9 of the MCU chip U3 is connected with a pin 1 (USB 5 Vin) of the USB interface J1, and a capacitor C12 plays a role in filtering; capacitor C22 and capacitor C16 also act as filters; the diode TVS1, the diode TVS18 and the diode TVS19 are TVS protection diodes, so that a protection effect is achieved, and the circuit can be effectively protected from voltage spikes induced by wires.
In some embodiments, as shown in fig. 5, the crystal oscillator circuit includes a crystal oscillator X1, a capacitor C4 and a resistor R11, where a pin 1 of the crystal oscillator X1 is connected to one end of the capacitor C1, one end of the resistor R11 and a pin 30 of the MCU chip U3, a pin 4 of the crystal oscillator X1 is connected to the other end of the capacitor C1 and then grounded, and a pin 3 of the crystal oscillator X1 is connected to one end of the capacitor C4, the other end of the resistor R11 and a pin 29 of the MCU chip U3, and a pin 2 of the crystal oscillator X1 is connected to the other end of the capacitor C4 and then grounded.
The capacitor C1 and the capacitor C4 are used as matching capacitors, so that the accuracy of the working frequency of the crystal oscillator X1 is improved.
In some embodiments, as shown in fig. 6, the voltage stabilizing circuit includes a voltage stabilizing chip U1, a capacitor C2, a capacitor C5 and a capacitor C6, where after the pin 1 and the pin 3 of the voltage stabilizing chip U1 are connected to each other, they are connected to the pin 1 of the USB interface J1, the pin 9 of the MCU chip U3 and the capacitor C2 that is grounded, the pin 2 of the voltage stabilizing chip U1 is grounded, the pin 4 of the voltage stabilizing chip U1 is connected to the capacitor C6 that is grounded, and after the pin 5 of the voltage stabilizing chip U1 is connected to the capacitor C5 that is grounded, it is used as the voltage terminal VDD3V.
Wherein, electric capacity C2 plays filtering and energy storage's effect, and electric capacity C5 plays the filtering effect.
In some embodiments, as shown in fig. 7, the recording port circuit includes a recording port P1, a resistor R5, a resistor R8, a resistor R9, and a capacitor C20, where a pin 1 of the recording port P1 is externally connected to a voltage terminal VDD3V, a pin 2 of the recording port P1 is connected to one end of the resistor R8 and a pin 23 of the MCU chip U3, a pin 3 of the recording port P1 is connected to one end of the resistor R9 and a pin 24 of the MCU chip U3, a pin 4 of the recording port P1 is connected to one end of the resistor R5, a grounded capacitor C20 and a pin 31 of the MCU chip U3, another end of the resistor R8 is connected to another end of the resistor R9 and then externally connected to a voltage terminal VDD3V, and another end of the resistor R5 is externally connected to the voltage terminal VDD3V.
The resistor R8 and the resistor R9 are pull-up resistors, and connection relationships, which are not described, may be set and connected as shown in fig. 1 to 7.
It should be understood that, as shown in fig. 1, 2 and 3, the board connector is an interface J2 and an interface J3, and when the MCU circuit is connected to the IIC interface of the touch screen board through the interface J2, the pins 1, 2, 3 and 28 of the MCU chip U3 are connected to the pins 3, 5, 4 and 2 of the interface J2 in a one-to-one correspondence; when the MCU circuit is connected with the UART interface of the touch screen panel card through the interface J3, the pin 26, the pin 27 and the pin 9 of the MCU chip U3 are connected with the pin 5, the pin 4 and the pin 6 of the interface J3 in a one-to-one correspondence.
In sum, the required program can be programmed to the MCU chip U3 through the programming port P1, the crystal oscillator X1 provides working frequency for the MCU chip U3, the voltage stabilizing chip U1 provides working voltage, the MCU chip U3 is connected with the IIC interface or the UART interface of the touch screen board through the interface J2 or the interface J3, the MCU chip U3 converts the IIC interface or the UART interface of the touch screen board into a USB interface through the USB interface J1, the original USB+IIC interface or the USB+UART interface of the touch screen board can be converted into a double USB interface, a double USB scheme is not required to be designed on a public board, and the cost is reduced.
While the above examples describe various embodiments of the present utility model, those skilled in the art will appreciate that various changes and modifications can be made to these embodiments without departing from the spirit and scope of the present utility model, and that such changes and modifications fall within the scope of the present utility model.
Claims (4)
1. A touch screen communication switching circuit, comprising:
the MCU circuit is used for being connected with an IIC interface or a UART interface of the touch screen board through the board connector;
the crystal oscillator circuit is connected with the MCU circuit;
the voltage stabilizing circuit is connected with the MCU circuit;
the USB interface circuit is connected with the MCU circuit;
the burning port circuit is connected with the MCU circuit;
the MCU circuit comprises an MCU chip U3, a capacitor C12, a capacitor C16, a capacitor C17, a capacitor C21 and a capacitor C22, wherein a pin 9 of the MCU chip U3 is connected with the capacitor C12 which is grounded, a pin 10 of the MCU chip U3 is connected with the capacitor C17 which is grounded, a pin 6 of the MCU chip U3 is connected with the capacitor C21 which is grounded, a pin 25 of the MCU chip U3 is connected with the capacitor C16 which is grounded and then is connected with an external voltage end VDD3V, and a pin 7 of the MCU chip U3 is connected with the capacitor C22 which is grounded and then is connected with an external voltage end VDD3V;
the USB interface circuit comprises a USB interface J1, a diode TVS18, a diode TVS19, a resistor R1 and a resistor R2, wherein one end of the resistor R1 is connected with a pin 12 of the MCU chip U3, the other end of the resistor R1 is connected with a pin 3 of the USB interface J1 and the diode TVS19 which is grounded, one end of the resistor R2 is connected with a pin 11 of the MCU chip U3, the other end of the resistor R2 is connected with a pin 2 of the USB interface J1 and the diode TVS18 which is grounded, and the pin 1 of the USB interface J1 is connected with the diode TVS1 which is grounded.
2. The touch screen communication switching circuit according to claim 1, wherein the crystal oscillator circuit comprises a crystal oscillator X1, a capacitor C4 and a resistor R11, wherein a pin 1 of the crystal oscillator X1 is connected with one end of the capacitor C1, one end of the resistor R11 and a pin 30 of the MCU chip U3, a pin 4 of the crystal oscillator X1 is connected with the other end of the capacitor C1 and then grounded, a pin 3 of the crystal oscillator X1 is connected with one end of the capacitor C4, the other end of the resistor R11 and a pin 29 of the MCU chip U3, and a pin 2 of the crystal oscillator X1 is connected with the other end of the capacitor C4 and then grounded.
3. The touch screen communication switching circuit according to claim 1, wherein the voltage stabilizing circuit comprises a voltage stabilizing chip U1, a capacitor C2, a capacitor C5 and a capacitor C6, the pin 1 and the pin 3 of the voltage stabilizing chip U1 are connected and then connected with the pin 1 of the USB interface J1, the pin 9 of the MCU chip U3 and the capacitor C2 which is grounded, the pin 2 of the voltage stabilizing chip U1 is grounded, the pin 4 of the voltage stabilizing chip U1 is connected with the capacitor C6 which is grounded, and the pin 5 of the voltage stabilizing chip U1 is connected with the capacitor C5 which is grounded and then used as a voltage terminal VDD3V.
4. The touch screen communication switching circuit according to claim 1, wherein the burning port circuit comprises a burning port P1, a resistor R5, a resistor R8, a resistor R9 and a capacitor C20, wherein a pin 1 of the burning port P1 is externally connected with a voltage terminal VDD3V, a pin 2 of the burning port P1 is connected with one end of the resistor R8 and a pin 23 of the MCU chip U3, a pin 3 of the burning port P1 is connected with one end of the resistor R9 and a pin 24 of the MCU chip U3, a pin 4 of the burning port P1 is connected with one end of the resistor R5, the capacitor C20 grounded and a pin 31 of the MCU chip U3, the other end of the resistor R8 is connected with the other end of the resistor R9 and then externally connected with a voltage terminal VDD3V, and the other end of the resistor R5 is externally connected with the voltage terminal VDD3V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223546397.3U CN218974905U (en) | 2022-12-29 | 2022-12-29 | Touch screen communication switching circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223546397.3U CN218974905U (en) | 2022-12-29 | 2022-12-29 | Touch screen communication switching circuit |
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| Publication Number | Publication Date |
|---|---|
| CN218974905U true CN218974905U (en) | 2023-05-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223546397.3U Active CN218974905U (en) | 2022-12-29 | 2022-12-29 | Touch screen communication switching circuit |
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| Country | Link |
|---|---|
| CN (1) | CN218974905U (en) |
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- 2022-12-29 CN CN202223546397.3U patent/CN218974905U/en active Active
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