CN220040998U - Circuit of upper computer through USB cable RESET main control board - Google Patents
Circuit of upper computer through USB cable RESET main control board Download PDFInfo
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- CN220040998U CN220040998U CN202321514904.7U CN202321514904U CN220040998U CN 220040998 U CN220040998 U CN 220040998U CN 202321514904 U CN202321514904 U CN 202321514904U CN 220040998 U CN220040998 U CN 220040998U
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- 229910052710 silicon Inorganic materials 0.000 claims description 3
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- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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Abstract
The utility model discloses a circuit of a RESET main control board of an upper computer through a USB cable, which comprises a control circuit, wherein the control circuit is used for connecting an MCU with a host, the control circuit comprises a main control chip U1, an optical coupler and a wiring terminal J7, the wiring terminal J7 is used for connecting the host to obtain working voltage, the main control chip U1 is connected with the wiring terminal J7 to obtain a host communication signal, and the optical coupler is connected with the main control chip U1 to display an indication signal of the main control chip U1. The utility model is integrated by one chip, the circuit is simple, and the cost is low; the USB-to-serial port data transmission conversion function and the I/O port control function are provided, and the host computer software can reset the main control board of the instrument and equipment through the USB cable, so that the device is stable and reliable.
Description
Technical Field
The utility model relates to the technical field of RESET circuits, in particular to a circuit of a RESET main control board of an upper computer through a USB cable.
Background
The high-performance intelligent instrument and meter/scientific analysis instrument and detection instrument are usually connected with an upper computer (i.e. host) in a communication way in the working process, and the upper computer is used for controlling the analysis instrument, the detection instrument and the like to work. In the process of communicating the instrument and the upper computer, the instrument is inevitably halted or firmware is hung up to be dead because of the interference problem or the software firmware BUG problem; or after the instrument runs for a long time, part of parameter indexes drift, and the instrument and the equipment need to be reinitialized. At this time, RESET needs to be performed on the instrument equipment, so that the instrument can be restarted and then can work online. In the prior art, the circuit of the RESET is complex through the upper computer control instrument, so that more components are used in the circuit, the manufacturing cost of the instrument is increased, the circuit does not have a communication function, and further, another circuit is connected with the upper computer, so that the working efficiency is influenced.
Disclosure of Invention
The utility model aims to provide a circuit of a RESET main control board of an upper computer through a USB cable, so as to solve the problems in the background technology.
In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a circuit of host computer through USB cable RESET main control board, includes control circuit, control circuit is used for being connected MCU with the host computer, control circuit includes main control chip U1, opto-coupler and binding post J7, binding post J7 is used for connecting the host computer obtains operating voltage, main control chip U1's connection acquire behind binding post J7 host computer communication signal, opto-coupler with main control chip U1 connects the back and shows main control chip U1's indication signal.
Preferably, a seventh pin of the main control chip U1 is connected to the connection terminal J7.
Preferably, the third pin and the fourth pin of the main control chip U1 are respectively connected to the connection terminal J7 and then communicate with the host.
Preferably, the twentieth pin and the twenty-first pin of the main control chip U1 are used for communicating with the serial port of the MCU, and the thirteenth pin of the main control chip U1 is used for controlling the reset pin of the MCU.
Preferably, a pull-up resistor is arranged in a reset pin of the MCU, and a reset capacitor is arranged outside the reset pin of the MCU.
Preferably, the main control chip U1 adopts a UART protocol interface chip of CP2102N-A02-GQFN24R signals of SILICON LABS.
Preferably, the optocoupler is a single-channel direct current input optocoupler of a model TLP 185.
Compared with the prior art, the utility model has the beneficial effects that: the utility model is integrated by one chip, the circuit is simple, and the cost is low; the USB-to-serial port data transmission conversion function and the I/O port control function are provided, and the host computer software can reset the main control board of the instrument and equipment through the USB cable, so that the device is stable and reliable.
Drawings
FIG. 1 is a schematic diagram of a circuit connection of the present utility model;
FIG. 2 is a schematic circuit diagram of the present utility model;
fig. 3 is a schematic diagram of the structure of the reset pin of the MCU according to the present utility model.
In the figure: 100. a host; 200. a control circuit; 10. a pull-up resistor; 20. and resetting the capacitor.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1, the present utility model provides a technical solution: the utility model provides a circuit of host computer through USB cable RESET main control board, including control circuit 200, this control circuit 200 is used for being connected MCU and host computer 100 (computer), control circuit 200 includes main control chip U1, opto-coupler IC21 and binding post J7, binding post J7 is used for connecting host computer 100 and acquires operating voltage, host computer 100 communication signal is obtained after main control chip U1's the connection binding post J7, opto-coupler 300 shows the instruction signal of main control chip U1 after being connected with main control chip U1.
Specifically, the seventh pin (VREGIN pin) of the main control chip U1 is connected to the connection terminal J7, and the host 100 provides the DC5V voltage to the main control chip U1 through the USB cable.
Specifically, a third pin (D+ pin) and a fourth pin (D-pin) of the main control chip U1 are respectively connected with the wiring terminal J7 and then communicated with the host.
Specifically, the twentieth pin (RXD pin) and the twenty-first pin (TXD pin) of the main control chip U1 are used for communicating with the serial port of the MCU, and the thirteenth pin (GPIO 1 pin) of the main control chip U1 is used for controlling the reset pin NRST of the MCU.
Specifically, the reset pin NRST of the MCU is internally provided with a pull-up resistor 10, the reset pin of the MCU is externally provided with a reset capacitor 20, further, the resistance value of the pull-up resistor 10 is 40K, and the capacitance of the reset capacitor is 0.1uF.
In the embodiment of the utility model, the main control chip U1 adopts a UART protocol interface chip of CP2102N-A02-GQFN24R signals of SILICON LABS, and the chip is a product in the prior art, and the circuit diagram is shown in FIG. 2 and is not described in detail.
In an embodiment of the present utility model, the optocoupler uses a single-channel dc input optocoupler of type TLP 185. The connection relation of each pin is as follows:
the first pin is connected with an input end and an output end through a resistor R78;
the third pin is connected with a thirteenth pin (GPIO 1 pin) of the main control chip U1;
the fourth pin is grounded;
reset pin NRST of sixth pin MCU.
The working principle of the circuit diagram provided by the utility model is as follows:
the host 100 controls the level of the 13 th pin (GPIO 1 pin) of the main control chip U1 by executing the corresponding instruction program, and transmitting the instruction program to the main control chip U1 through the USB cable:
a. when gpios1=0, the optocoupler emits light when energized, nrst=0;
b. when gpios1=1 and the optocoupler does not emit light, nrst=1;
c. in a normal working state of the MCU, GPIO 1=1; when the MCU is required to be reset, the GPIO 1=0 is enabled, after the time delay is 100ms, the GPIO 1=1 is enabled, namely, a low-level pulse of 100ms is executed, and the reset operation of the MCU can be completed.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides a circuit of host computer through USB cable RESET main control board, includes control circuit, control circuit is used for being connected MCU and host computer, its characterized in that: the control circuit comprises a main control chip U1, an optocoupler and a wiring terminal J7, wherein the wiring terminal J7 is used for being connected with a host to obtain working voltage, the main control chip U1 is connected with the wiring terminal J7 to obtain host communication signals, and the optocoupler is connected with the main control chip U1 to display indication signals of the main control chip U1.
2. The circuit of the RESET main control board of the upper computer through the USB cable according to claim 1, wherein the circuit is characterized in that: and a seventh pin of the main control chip U1 is connected with the wiring terminal J7.
3. The circuit of the RESET main control board of the upper computer through the USB cable according to claim 1, wherein the circuit is characterized in that: and a third pin and a fourth pin of the main control chip U1 are respectively connected with the wiring terminal J7 and then communicated with a host.
4. The circuit of the RESET main control board of the upper computer through the USB cable according to claim 1, wherein the circuit is characterized in that: the twenty-first pin and the twenty-first pin of the main control chip U1 are used for communicating with the serial port of the MCU, and the thirteenth pin of the main control chip U1 is used for controlling the reset pin of the MCU.
5. The circuit of the RESET main control board of the upper computer through the USB cable according to claim 1, wherein the circuit is characterized in that: and a pull-up resistor is arranged in the reset pin of the MCU, and a reset capacitor is arranged outside the reset pin of the MCU.
6. The circuit of the RESET main control board of the upper computer through the USB cable according to claim 1, wherein the circuit is characterized in that: the main control chip U1 adopts a UART protocol interface chip of CP2102N-A02-GQFN24R signals of SILICON LABS.
7. The circuit of the RESET main control board of the upper computer through the USB cable according to claim 1, wherein the circuit is characterized in that: the optocoupler adopts a single-channel direct current input optocoupler of a model TLP 185.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321514904.7U CN220040998U (en) | 2023-06-14 | 2023-06-14 | Circuit of upper computer through USB cable RESET main control board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321514904.7U CN220040998U (en) | 2023-06-14 | 2023-06-14 | Circuit of upper computer through USB cable RESET main control board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220040998U true CN220040998U (en) | 2023-11-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321514904.7U Active CN220040998U (en) | 2023-06-14 | 2023-06-14 | Circuit of upper computer through USB cable RESET main control board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220040998U (en) |
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2023
- 2023-06-14 CN CN202321514904.7U patent/CN220040998U/en active Active
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