A control circuit applied to an electromagnetic capacitor encryption all-in-one machine

Abstract

The utility model relates to hardware circuit field, concretely is a control circuit applied to electromagnetic electric capacity encryption integrated machine. Including interface circuit, power supply chip, HUB chip and main control chip, interface circuit is used for accessing power signal and USB signal, power signal connects the input end of power supply chip, passes through voltage conversion, and power supply chip output power signal is HUB chip, main control chip power supply, USB signal connects the input end of HUB chip, and the output end of HUB chip exports more than two way USB signal, one way USB signal connects main control chip, another way USB signal connects electric capacity touch -control screen, the rest USB signal is reserved signal for connecting external device, and the output end of main control chip leads out serial port signal and is connected with electromagnetic screen. The utility model has signal switching and low power consumption characteristics, improves the reliability of control circuit.

Description

Technical Field

[0001] This utility model relates to the field of hardware circuits, specifically a control circuit applied to an electromagnetic capacitor encryption integrated machine. Background Technology

[0002] Electromagnetic-capacitive encryption all-in-one machines integrate electromagnetic compatibility (EMC) technology, capacitive touch sensing technology, and hardware-level core circuit encryption functions to provide key solutions for secure data interaction across multiple industries. The control circuit, which serves as the core control component of the electromagnetic-capacitive encryption all-in-one machine, needs to function as a signal converter, power supply, and software implementation carrier. Existing electromagnetic-capacitive encryption all-in-one machines generally have complex control circuits, involve numerous external devices and input signals, are prone to mutual interference, have high power consumption, and are prone to overheating, thus affecting circuit lifespan. Utility Model Content

[0003] In view of the shortcomings of the prior art, this utility model provides a control circuit for an integrated electromagnetic capacitor encryption machine, which has signal conversion and low power consumption characteristics, thereby improving the reliability of the control circuit.

[0004] To solve the aforementioned technical problem, the present invention adopts the following technical solution: a control circuit for an electromagnetic-capacitive encryption integrated machine, comprising an interface circuit, a power chip, a HUB chip, and a main control chip. The interface circuit is used to receive power signals and USB signals. The power signal is connected to the input terminal of the power chip. After voltage conversion, the power chip outputs a power signal to power the HUB chip and the main control chip. The USB signal is connected to the input terminal of the HUB chip. The output terminal of the HUB chip outputs two or more USB signals. One USB signal is connected to the main control chip, another USB signal is connected to the capacitive touch screen, and the remaining USB signals are reserved for connecting peripherals. The output terminal of the main control chip leads out a serial port signal and connects to the electromagnetic screen.

[0005] Furthermore, the multiple USB signals output by the HUB chip are set to be of equal length, width, and spacing on the PCB board.

[0006] Furthermore, the interface circuit includes a USB Type B interface and a PH2.0-4PIN connector. A protection diode is provided between the power signal line, the USB signal line and ground. One end of the protection diode is grounded, and the other end is connected to the power signal line and the USB signal line.

[0007] Furthermore, the power chip has an input signal of +5V and output signals of +3.3V and +1.2V.

[0008] Furthermore, the power chip model is BL8028CB5TR or SY8088IAAC. The input terminal of the power chip is connected to the enable pin to input the signal, and the output terminal is connected to the output signal through an inductor, a voltage divider resistor, and a filter capacitor.

[0009] Furthermore, the main control chip is model HX6802, and the serial port signal output from the HX6802 is connected to connector CON5. The electromagnetic screen is connected to connector CON5.

[0010] The beneficial effects of this utility model are as follows: This utility model introduces a single USB signal, which is then split into multiple USB signals by a HUB chip. Depending on the application scenario, these multiple USB signals are connected to the main control chip, capacitive touchscreen, or other peripheral devices. This method can solve the application requirements of managing multiple USB devices and provides reserved interfaces, enabling the control circuit to have multi-interface, multi-tasking capabilities. Furthermore, the inclusion of protection diodes and the equal length, width, and spacing of the multiple USB signals on the PCB board effectively reduces interference between signals, ensuring stable, reliable, and accurate transmission of USB differential signals and guaranteeing high-quality signal transmission. It integrates a high-stability 5V to 3.3V DC-DC power supply chip and a 5V to 1.2V DC-DC power supply chip, supporting continuous and stable output: low-ripple, low-noise 3.3V and 1.2V, providing stable and accurate operation for the HX6802 chip and HUB chip. To solve the interaction problem between the HX6802 core chip and the electromagnetic screen, a serial port line is designed for the main control chip to communicate with the electromagnetic screen via the serial port for encrypted data transmission and debugging. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the principle of this utility model; Figure 2 This is the schematic diagram of the interface circuit; Figure 3 This is a schematic diagram of the power supply chip and its peripheral circuitry. Figure 4 This is a schematic diagram of the HUB chip and its peripheral circuitry. Figure 5 This is a schematic diagram of a serial port circuit. Detailed Implementation

[0012] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0013] Example 1 This embodiment discloses a control circuit applied to an electromagnetic capacitance encryption integrated machine, such as... Figure 1As shown, it includes an interface circuit, a power chip, a HUB chip, and a main control chip. The interface circuit is used to receive power signals and USB signals. The power signal is connected to the input terminal of the power chip. After voltage conversion, the power chip outputs a power signal to power the HUB chip and the main control chip. The USB signal is connected to the input terminal of the HUB chip. The output terminal of the HUB chip outputs two or more USB signals. One USB signal is connected to the main control chip, another USB signal is connected to the capacitive touch screen, and the remaining USB signals are reserved for connecting peripherals. The output terminal of the main control chip leads out a serial port signal and connects to the electromagnetic screen.

[0014] like Figure 2 As shown, the interface circuit includes a USB Type B interface and a PH2.0-4PIN connector, allowing for flexible adaptation to devices with different interface types by using different cables. Protection diodes D2, D3, and D4 are installed between the power signal line VUSBIN, the USB signal lines D+ and D-, and ground. One end of each diode is grounded, and the other end is connected to either the power signal line VUSBIN or the USB signal lines D+ and D-. A filter capacitor C6 is installed between the power signal line VUSBIN and ground. This protection design enables the circuit to achieve the highest common Level 4 protection rating (contact discharge ±8KV, air discharge ±15KV), protecting the interface while ensuring high-quality signal transmission.

[0015] In this embodiment, the power chip uses a 5V power supply as the input, which is converted to output +3.3V and +1.2V voltages. Specifically... Figure 3 As shown, the power supply chip is either BL8028CB5TR or SY8088IAAC. The input terminal VIN of the power supply chip is connected to the enable pin N, which is connected to the +5V input signal. The output terminal is connected to the output signal via an inductor, voltage divider resistors, and a filter capacitor. This embodiment uses two power supply chips to convert 5V to 3.3V and 5V to 1.2V. These power supply chips are DC-DC power supply chips, supporting continuous and stable output of low-ripple, low-noise 3.3V and 1.2V to power the HX6802 chip and HUB chip for stable and accurate operation.

[0016] like Figure 4 As shown, the HUB chip's input terminals contain a set of USB differential signals DM0 and DP0. Through a special hardware circuit design on the PCB board—equal length, equal width, and equal spacing—stable, reliable, and accurate transmission of the USB differential signals is ensured. To address the application requirements of managing multiple USB devices, a USB-HUB chip is integrated into the design. This chip converts the input USB signal into four sets of USB differential signals. One set connects to the HX6802 chip for information processing. Another set connects to a capacitive touchscreen, and the remaining two sets are reserved for connecting peripherals. This innovative design provides multi-interface, multi-tasking capabilities.

[0017] like Figure 5 As shown, the main control chip is model HX6802. The serial port signal from the output terminal of HX6802 is connected to connector CON5, and the electromagnetic screen is connected to the connecting machine CON5. In this embodiment, the domestically produced HX6802 chip is used as a dedicated encryption chip with a USB interface. Based on the national cryptographic certification, the HX6802 chip communicates with the electromagnetic screen, and the chip completes the collection and processing of electromagnetic signals to achieve secure encryption of electromagnetic information, effectively improving the security and reliability of signatures.

[0018] The above description is only the basic principle and preferred embodiment of this utility model. Any improvements and substitutions made by those skilled in the art based on this utility model shall fall within the protection scope of this utility model.

Claims

1. A control circuit for an integrated electromagnetic capacitor encryption machine, characterized in that: It includes an interface circuit, a power chip, a hub chip, and a main control chip. The interface circuit is used to receive power signals and USB signals. The power signal is connected to the input terminal of the power chip. After voltage conversion, the power chip outputs a power signal to power the hub chip and the main control chip. The USB signal is connected to the input terminal of the hub chip. The output terminal of the hub chip outputs two or more USB signals. One USB signal is connected to the main control chip, another USB signal is connected to the capacitive touch screen, and the remaining USB signals are reserved for connecting peripherals. The output terminal of the main control chip leads out a serial port signal and connects to the electromagnetic screen.

2. The control circuit for an integrated electromagnetic capacitor encryption machine according to claim 1, characterized in that: The interface circuit includes a USB Type B interface and a PH2.0-4PIN connector. A protection diode is provided between the power signal line, the USB signal line and ground. One end of the protection diode is grounded and the other end is connected to the power signal line and the USB signal line.

3. The control circuit for an integrated electromagnetic capacitor encryption machine according to claim 1, characterized in that: The power chip has an input signal of +5V and output signals of +3.3V and +1.2V.

4. The control circuit for an integrated electromagnetic capacitor encryption machine according to claim 3, characterized in that: The power chip model is BL8028CB5TR or SY8088IAAC. The input terminal of the power chip is connected to the enable pin to receive the input signal, and the output terminal is connected to the output signal through an inductor, a voltage divider resistor, and a filter capacitor.

5. The control circuit for an integrated electromagnetic capacitor encryption machine according to claim 1, characterized in that: The main control chip is model HX6802. The serial port signal output from the HX6802 is connected to connector CON5, and the electromagnetic screen is connected to connector CON5.

6. The control circuit for an integrated electromagnetic capacitor encryption machine according to claim 1, characterized in that: The multiple USB signals output by the HUB chip are set to have equal length, width, and spacing on the PCB board.

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