Display control device based on RK3588 core board

Abstract

The utility model relates to the electronic technical field, concretely, a kind of display control device based on RK3588 core board;Including RK3588 core board, network interface extension module, protocol transceiver module;Based on RK3588 core board, PCIE is converted into Ethernet by setting network interface extension module, and SPI is converted into Arinc429 interface by setting protocol transceiver module;The degree of localization substitution and DU compatibility of display control hardware are improved.

Description

Technical Field

[0001] This utility model relates to the field of electronic technology, and more specifically, to a display control device based on the RK3588 core board. Background Technology

[0002] The RK3588 is currently one of the most powerful domestically produced core processors, featuring a quad-core ARM Cortex-A76 at 2.4GHz and a quad-core ARM Cortex-A55 at 1.8GHz big.LITTLE architecture, providing efficient computing and multi-threaded processing capabilities. The RK3588 processor has 6 TOPS NPUs, supports INT4 / INT8 / INT16 / FP16 / BF16 / TF32, and supports TensorFlow / PyTorch / Caffe / MXNet deep learning frameworks, capable of handling various big data computing scenarios. It supports high-speed industrial interfaces such as PCIe 3.0, 3 PCIe 2.1 ports, 3 USB 3.1 ports, 3 SATA ports, and 2 GMAC ports, enabling high-speed connections to various external devices. Currently, existing display control hardware mainly uses foreign processors, resulting in a low degree of domestic substitution in the overall solution. Utility Model Content

[0003] This invention addresses the problems of low domestic substitution rate and incompatibility with DU in existing display control hardware by proposing a display control device based on the RK3588 core board. Based on the RK3588 core board, a network port expansion module is set to convert PCIE to Ethernet, and a protocol transceiver module is set to convert SPI to an Arinc429 interface; thus improving the domestic substitution rate and DU compatibility of the display control hardware.

[0004] The specific implementation details of this utility model are as follows:

[0005] A display control device based on the RK3588 core board includes the RK3588 core board, a network port expansion module, and a protocol transceiver module;

[0006] The network port expansion module is connected to the PCIE interface and RGMII interface of the RK3588 core board;

[0007] The protocol transceiver module is connected to the MIPI interface of the RK3588 core board;

[0008] The network port expansion module is used to convert PCIE interfaces and RGMII interfaces into multiple Ethernet ports;

[0009] The protocol transceiver module is used to convert the SPI interface to an Arinc429 interface.

[0010] To better realize this utility model, the protocol transceiver module further includes an Arinc429 protocol transceiver chip and an Arinc429 connector.

[0011] One end of the Arinc429 protocol transceiver chip is connected to the first MIPI input interface of the RK3588 core board via the SPI interface, and the other end is connected to the Arinc429 connector.

[0012] To better realize this utility model, the network port expansion module further includes an Ethernet control chip and an Ethernet PHY chip;

[0013] One end of the Ethernet control chip is connected to the PCIE interface of the RK3588 core board, and the other end is connected to four RJ45 interfaces.

[0014] One end of the Ethernet PHY chip is connected to the RGMII interface of the RK3588 core board, and the other end is connected to one RJ45 interface.

[0015] To better realize this utility model, the display control device based on the RK3588 core board further includes a video interface module;

[0016] The video interface module includes a conversion chip and a first HDMI connector;

[0017] One end of the conversion chip is connected to the second MIPI input interface of the RK3588 core board, and the other end is connected to the first HDMI connector.

[0018] To better realize this utility model, the video interface module further includes a second HDMI connector, a third HDMI connector, a fourth HDMI connector, and a MIPI connector;

[0019] The second and third HDMI connectors are connected to the HDMI output interfaces of the RK3588 core board;

[0020] The fourth HDMI connector is connected to the HDMI input interface of the RK3588 core board;

[0021] The MIPI connector is connected to the MIPI input interface of the RK3588 core board.

[0022] To better realize this utility model, the display control device based on the RK3588 core board further includes a power supply module;

[0023] The power module includes an overvoltage and overcurrent protection circuit, an energy storage circuit, a surge suppressor, a DC-DC isolation module, and a DC-DC conversion module;

[0024] The overvoltage and overcurrent protection circuit receives a 28V voltage at its input terminal and its output terminal is connected to the input terminal of the energy storage circuit.

[0025] The input terminal of the surge suppressor is connected to the output terminal of the energy storage circuit, and the output terminal of the surge suppressor is connected to the input terminal of the DC-DC isolation module.

[0026] The input terminal of the DC-DC conversion module is connected to the output terminal of the DC-DC isolation module, and the output terminal of the DC-DC conversion module is connected to the input terminal of the RK3588 core board.

[0027] To better realize this utility model, the DC-DC conversion module further includes a first DC-DC conversion chip, a second DC-DC conversion chip, and a third DC-DC conversion chip;

[0028] The input terminal of the first DC-DC converter chip is connected to the output terminal of the DC-DC isolation module, and the output terminal of the first DC-DC converter chip is connected to the input terminal of the RK3588 core board.

[0029] The first DC-DC converter chip is used to convert the 12V voltage obtained from the DC-DC isolation module into a 4V voltage;

[0030] The input terminal of the second DC-DC converter chip is connected to the output terminal of the DC-DC isolation module. The output terminal of the second DC-DC converter chip is connected to the input terminal of the converter chip, the UART interface of the RK3588 core board, the TYPEC interface of the RK3588 core board, the Arinc429 protocol transceiver chip, the Ethernet control chip, the Ethernet PHY chip, the HDMI input interface of the RK3588 core board, the HDMI output interface of the RK3588 core board, and the MIPI input interface of the RK3588 core board.

[0031] The second DC-DC converter chip is used to convert the 12V voltage obtained from the DC-DC isolation module to a 3.3V voltage;

[0032] The input terminal of the third DC-DC converter chip is connected to the output terminal of the DC-DC isolation module, and the output terminal of the third DC-DC converter chip is connected to the HDMI output interface and the TYPEC interface of the RK3588 core board.

[0033] The third DC-DC converter chip is used to convert the 12V voltage obtained from the DC-DC isolation module into a 5V voltage.

[0034] This utility model has the following beneficial effects:

[0035] This utility model is based on the RK3588 core board. By setting up a network port expansion module, it converts PCIE to Ethernet, and by setting up a protocol transceiver module, it converts SPI to an Arinc429 interface; thus improving the localization of display control hardware and DU compatibility. Attached Figure Description

[0036] Figure 1 A schematic block diagram of the display control device based on the RK3588 core board provided by this utility model.

[0037] Figure 2 A schematic block diagram of the 5-channel video function module provided by this utility model.

[0038] Figure 3 A schematic block diagram of the Ethernet module structure provided by this utility model.

[0039] Figure 4 A schematic block diagram of the 2-channel Arinc429 structure provided by this utility model.

[0040] Figure 5 A schematic diagram of the power module structure provided by this utility model. Detailed Implementation

[0041] To more clearly illustrate the technical solutions of the embodiments of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. It should be understood that the described embodiments are only some embodiments of this utility model, not all embodiments, and therefore should not be regarded as a limitation on the scope of protection. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0042] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "set up," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0043] Example 1:

[0044] This embodiment proposes a display control device based on the RK3588 core board, including the RK3588 core board, a network port expansion module, and a protocol transceiver module;

[0045] The network port expansion module is connected to the PCIE interface and RGMII interface of the RK3588 core board;

[0046] The protocol transceiver module is connected to the MIPI interface of the RK3588 core board;

[0047] The network port expansion module is used to convert PCIE interfaces and RGMII interfaces into multiple Ethernet ports;

[0048] The protocol transceiver module is used to convert the SPI interface to an Arinc429 interface.

[0049] Working principle: This embodiment is based on the RK3588 core board. By setting up a network port expansion module, PCIE is converted to Ethernet, and by setting up a protocol transceiver module, SPI is converted to an Arinc429 interface; thus improving the localization of display control hardware and DU compatibility.

[0050] Example 2:

[0051] This embodiment is based on the above embodiment 1, such as... Figure 1 , Figure 4 As shown, the specific structure of the protocol transceiver module is illustrated using a specific embodiment.

[0052] The protocol transceiver module includes an Arinc429 protocol transceiver chip and an Arinc429 connector;

[0053] One end of the Arinc429 protocol transceiver chip is connected to the first MIPI input interface of the RK3588 core board via the SPI interface, and the other end is connected to the Arinc429 connector.

[0054] Working principle: This embodiment is equipped with two Arinc429 function modules, which convert SPI into one Arinc429 output and two Arinc429 inputs through HI-3593.

[0055] The HI-3593 chip used in this embodiment is an Arinc429 protocol transceiver chip. This chip supports two-way reception and one-way transmission, where each receiver has tag identification, a 32×32 FIFO, and an analog line receiver.

[0056] Implementation diagram as follows Figure 4 As shown, the main performance indicators of HI-3593 are as follows:

[0057] Microcontrollers that support SPI;

[0058] Supports the industry-standard Arinc429 interface;

[0059] Minimize the number of peripherals and occupy fewer ports;

[0060] Supports 3.3V power supply;

[0061] Operating ambient temperature: -40℃~85℃;

[0062] Storage temperature range: -65℃ to 150℃.

[0063] The other parts of this embodiment are the same as those in Embodiment 1 above, so they will not be described again.

[0064] Example 3:

[0065] This embodiment is based on any one of Embodiments 1-2 above, such as Figure 1 , Figure 3 As shown, the specific structure of the network port expansion module is illustrated using a specific embodiment.

[0066] The network port expansion module includes an Ethernet control chip and an Ethernet PHY chip;

[0067] One end of the Ethernet control chip is connected to the PCIE interface of the RK3588 core board, and the other end is connected to four RJ45 interfaces.

[0068] One end of the Ethernet PHY chip is connected to the RGMII interface of the RK3588 core board, and the other end is connected to one RJ45 interface.

[0069] Working principle: The RK3588 core board only supports a maximum of two Ethernet ports. To meet current requirements, port expansion and conversion are needed. The currently selected solution is as follows:

[0070] The WX1860AL4 from Netcom Technology is used to expand four Ethernet ports via PCIe 2.0 x4, thus achieving four Ethernet ports. Then, the RK3588's built-in RGMII interface is used to connect the RTL8211F Ethernet PHY chip to achieve another Ethernet interface.

[0071] The Netcom WX1860AL4 gigabit Ethernet controller chip supports four-port and dual-ended gigabit Ethernet designs, featuring four fully integrated gigabit Ethernet media access control (MAC) modules, a physical layer PHY module, and four RGMII interfaces for connecting to external PHYs. It can be used in PC servers and embedded network devices.

[0072] Implementation diagram as follows Figure 3 As shown, the main performance indicators of the WX1860AL4 are as follows:

[0073] Supports 4-port 1 GbE network interface;

[0074] Supports PCIe Gen2x4 host interface;

[0075] Supports 1000Base-T / 100Base-T / 10Base-T, RGMII;

[0076] Internally integrated gigabit MAC and PHY module;

[0077] Supports network protocol acceleration (TCP / UDP, IP);

[0078] Supports SM2 / SM3 / SM4 algorithms;

[0079] Operating ambient temperature: -40℃~85℃;

[0080] Storage environment temperature: -65℃~140℃;

[0081] The RTL8211F is a highly integrated Ethernet transceiver compliant with 10Base-T, 100Base-TX, and 1000Base-T IEEE 802.3 standards. It provides all necessary physical layer functions for transmitting and receiving Ethernet packets over CAT.5 UTP cable. The RTL8211FI and RTL8211FDI are manufactured to industry-grade standards.

[0082] The main performance specifications of the RTL8211F are as follows:

[0083] Compatible with 1000Base-T IEEE 802.3ab, 100Base-TX IEEE 802.3u, and 10Base-T IEEE 802.3;

[0084] Supports RGMII;

[0085] Supports interrupt functionality, parallel detection, cross detection, and automatic correction;

[0086] Supports 25MHz external crystal or OSC;

[0087] Operating ambient temperature: -40℃~85℃;

[0088] Storage temperature range: -55℃ to 125℃.

[0089] The other parts of this embodiment are the same as any one of the above embodiments 1-2, so they will not be described again.

[0090] Example 4:

[0091] This embodiment is based on any one of embodiments 1-3 above, such as Figure 1 , Figure 2As shown, the structure of the video interface module is described with reference to a specific embodiment. The display control device based on the RK3588 core board also includes a video interface module.

[0092] The video interface module includes a conversion chip and a first HDMI connector;

[0093] One end of the conversion chip is connected to the second MIPI input interface of the RK3588 core board, and the other end is connected to the first HDMI connector.

[0094] The video interface module also includes a second HDMI connector, a third HDMI connector, a fourth HDMI connector, and a MIPI connector.

[0095] The second and third HDMI connectors are connected to the HDMI output interfaces of the RK3588 core board;

[0096] The fourth HDMI connector is connected to the HDMI input interface of the RK3588 core board;

[0097] The MIPI connector is connected to the MIPI input interface of the RK3588 core board.

[0098] The block diagram of the 5-channel video function module is as follows: Figure 2 As shown, the technical requirements for the 5-channel video module are as follows:

[0099] Interface types: 4 HDMI ports, 1 MIPI port;

[0100] Quantity: 2 HDMI outputs, 2 HDMI inputs, 1 MIPI input;

[0101] Maximum supported resolution: 1920*1080 (1080P).

[0102] The RK3588 supports up to four video outputs: up to two HDMI_TX outputs, one HDMI_RX output, and up to four MIPI_RX outputs. It can directly support two HDMI outputs, one HDMI input, and one MIPI input. The missing HDMI input is achieved using the LT6911C interface converter chip, which converts HDMI_RX to MIPI_RX.

[0103] The main performance characteristics of HDMI_TX are as follows:

[0104] Supports HDMI 2.1 TX and is backward compatible with HDMI 2.0 and HDMI 1.4;

[0105] Supports a maximum resolution of 8K@60Hz;

[0106] Supports RGB / YUV444 / YUV420 (Up to 10-bit) formats;

[0107] The main performance characteristics of HDMI_RX are as follows:

[0108] Supports HDMI 2.0 RX and is backward compatible with HDMI 1.4b;

[0109] Supports maximum resolution 4K@60Hz

[0110] Supports RGB / YUV444 / YUV422 / YUV420 formats;

[0111] The main performance characteristics of MIPI_RX are as follows:

[0112] Supports MIPIV version 1.2, with a maximum transmission rate of 2.5Gbps per channel;

[0113] Supports ×4 Lane mode or ×2 Lane + × Lane mode;

[0114] The LT6911C is a high-performance HDMI 1.4 to MIPI DSI / CSI / LVDS converter chip, with the following key performance characteristics:

[0115] Supports HDMI 1.4 input;

[0116] Supports a maximum resolution of 1080P;

[0117] Supports configurable 1 / 2 port output;

[0118] Operating ambient temperature: -40℃~85℃;

[0119] Storage environment temperature: -65℃~150℃;

[0120] It supports 3.3V / 1.2V power input and has an ESD protection level of 2kV HBM.

[0121] The other parts of this embodiment are the same as any one of the embodiments 1-3 above, so they will not be described again.

[0122] Example 5:

[0123] This embodiment is based on any one of embodiments 1-4 above, such as Figure 1 , Figure 5 As shown, the display control device based on the RK3588 core board also includes a power supply module;

[0124] The power module includes an overvoltage and overcurrent protection circuit, an energy storage circuit, a surge suppressor, a DC-DC isolation module, and a DC-DC conversion module;

[0125] The overvoltage and overcurrent protection circuit receives a 28V voltage at its input terminal and its output terminal is connected to the input terminal of the energy storage circuit.

[0126] The input terminal of the surge suppressor is connected to the output terminal of the energy storage circuit, and the output terminal of the surge suppressor is connected to the input terminal of the DC-DC isolation module.

[0127] The input terminal of the DC-DC conversion module is connected to the output terminal of the DC-DC isolation module, and the output terminal of the DC-DC conversion module is connected to the input terminal of the RK3588 core board.

[0128] The DC-DC conversion module includes a first DC-DC conversion chip, a second DC-DC conversion chip, and a third DC-DC conversion chip;

[0129] The input terminal of the first DC-DC converter chip is connected to the output terminal of the DC-DC isolation module, and the output terminal of the first DC-DC converter chip is connected to the input terminal of the RK3588 core board.

[0130] The first DC-DC converter chip is used to convert the 12V voltage obtained from the DC-DC isolation module into a 4V voltage;

[0131] The input terminal of the second DC-DC converter chip is connected to the output terminal of the DC-DC isolation module. The output terminal of the second DC-DC converter chip is connected to the input terminal of the converter chip, the UART interface of the RK3588 core board, the TYPEC interface of the RK3588 core board, the Arinc429 protocol transceiver chip, the Ethernet control chip, the Ethernet PHY chip, the HDMI input interface of the RK3588 core board, the HDMI output interface of the RK3588 core board, and the MIPI input interface of the RK3588 core board.

[0132] The second DC-DC converter chip is used to convert the 12V voltage obtained from the DC-DC isolation module to a 3.3V voltage;

[0133] The input terminal of the third DC-DC converter chip is connected to the output terminal of the DC-DC isolation module, and the output terminal of the third DC-DC converter chip is connected to the HDMI output interface and the TYPEC interface of the RK3588 core board.

[0134] The third DC-DC converter chip is used to convert the 12V voltage obtained from the DC-DC isolation module into a 5V voltage.

[0135] Working principle: The power supply section of the RK3588 domestic display and control hardware mainly consists of the 4V voltage for the RK3588 core board and the 3.3V and 5V voltages required by various functional modules. The main power supply tree is as follows: Figure 5 As shown.

[0136] The power supply section mainly consists of a filter circuit, a surge suppression circuit, an energy storage circuit, an isolated DC / DC converter circuit, and a BIT circuit.

[0137] Filtering circuit: The power supply filtering circuit suppresses high-frequency interference signals introduced by the 28VDC input terminal on the machine, and at the same time suppresses noise generated inside the monitor from being conducted out through the power line, thereby improving the monitor's anti-interference ability and the system's reliability.

[0138] Surge Suppression Circuit: The surge protection circuit is designed for compatibility, employing two main components: First, it utilizes overcurrent protection devices, overvoltage protection devices, and switching control devices. Overcurrent protection devices ensure the RK3588 domestic display control hardware can quickly disconnect the power supply in case of overcurrent, preventing serious damage. Overvoltage protection devices ensure the RK3588 domestic display control hardware can withstand voltage spikes and overvoltage surges. Switching control devices regulate the operation of the RK3588 domestic display control hardware. Second, it uses a commercially available surge suppressor, which has been experimentally verified to meet our design surge performance requirements. Under certain conditions, both circuits can be used simultaneously to achieve even stricter surge requirements.

[0139] Energy storage circuit: The energy storage circuit consists of energy storage components. It stores electrical energy during a 50ms power outage to ensure stable power supply output during the power outage and prevent malfunctions of the RK3588 domestic display and control hardware due to power failure.

[0140] DC / DC Conversion Circuit: The isolated DC / DC conversion circuit receives and filters 28VDC to generate +12VDC power to meet the power requirements of other functional modules of the RK3588 domestic display and control hardware. The main component selected for the isolated DC / DC conversion circuit is the military standard module CFDMR50-PJGC.

[0141] Protection Circuit: The protection circuit is designed with an overvoltage and overcurrent monitoring chip and an external MOSFET. It can meet the protection requirements of overvoltage, overcurrent, undervoltage, and overpower, and feed the detection results back to the main controller.

[0142] Physical Interface: The physical interfaces of the RK3588 domestic display and control hardware are shown in Table 1.

[0143] Table 1 Main Interfaces of Self-developed RK3588

[0144]

[0145] Key component selection and localization: The key component selection for the RK3588 localized display and control hardware is shown in Table 2 below;

[0146] Table 2 Key Component Selection

[0147]

[0148] According to the key component selection table, only the Arinc429 converter chip currently lacks a suitable domestic alternative; the other key components can meet domestic production requirements, significantly improving the level of domestic production.

[0149] The other parts of this embodiment are the same as any one of the embodiments 1-4 above, so they will not be described again.

[0150] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A display control device based on the RK3588 core board, characterized in that, Includes the RK3588 core board, network port expansion module, and protocol transceiver module; The network port expansion module is connected to the PCIE interface and RGMII interface of the RK3588 core board; The protocol transceiver module is connected to the MIPI interface of the RK3588 core board; The network port expansion module is used to convert PCIE interfaces and RGMII interfaces into multiple Ethernet ports; The protocol transceiver module is used to convert the SPI interface to an Arinc429 interface.

2. The display control device based on the RK3588 core board according to claim 1, characterized in that, The protocol transceiver module includes an Arinc429 protocol transceiver chip and an Arinc429 connector; One end of the Arinc429 protocol transceiver chip is connected to the first MIPI input interface of the RK3588 core board via the SPI interface, and the other end is connected to the Arinc429 connector.

3. The display control device based on the RK3588 core board according to claim 1, characterized in that, The network port expansion module includes an Ethernet control chip and an Ethernet PHY chip; One end of the Ethernet control chip is connected to the PCIE interface of the RK3588 core board, and the other end is connected to four RJ45 interfaces. One end of the Ethernet PHY chip is connected to the RGMII interface of the RK3588 core board, and the other end is connected to one RJ45 interface.

4. A display control device based on the RK3588 core board according to claim 1, characterized in that, The display control device based on the RK3588 core board also includes a video interface module; The video interface module includes a conversion chip and a first HDMI connector; One end of the conversion chip is connected to the second MIPI input interface of the RK3588 core board, and the other end is connected to the first HDMI connector.

5. A display control device based on the RK3588 core board according to claim 4, characterized in that, The video interface module also includes a second HDMI connector, a third HDMI connector, a fourth HDMI connector, and a MIPI connector. The second and third HDMI connectors are connected to the HDMI output interfaces of the RK3588 core board; The fourth HDMI connector is connected to the HDMI input interface of the RK3588 core board; The MIPI connector is connected to the MIPI input interface of the RK3588 core board.

6. A display control device based on the RK3588 core board according to claim 1, characterized in that, The display control device based on the RK3588 core board also includes a power supply module; The power module includes an overvoltage and overcurrent protection circuit, an energy storage circuit, a surge suppressor, a DC-DC isolation module, and a DC-DC conversion module; The overvoltage and overcurrent protection circuit receives a 28V voltage at its input terminal and its output terminal is connected to the input terminal of the energy storage circuit. The input terminal of the surge suppressor is connected to the output terminal of the energy storage circuit, and the output terminal of the surge suppressor is connected to the input terminal of the DC-DC isolation module. The input terminal of the DC-DC conversion module is connected to the output terminal of the DC-DC isolation module, and the output terminal of the DC-DC conversion module is connected to the input terminal of the RK3588 core board.

7. A display control device based on the RK3588 core board according to claim 6, characterized in that, The DC-DC conversion module includes a first DC-DC conversion chip, a second DC-DC conversion chip, and a third DC-DC conversion chip; The input terminal of the first DC-DC converter chip is connected to the output terminal of the DC-DC isolation module, and the output terminal of the first DC-DC converter chip is connected to the input terminal of the RK3588 core board. The first DC-DC converter chip is used to convert the 12V voltage obtained from the DC-DC isolation module into a 4V voltage; The input terminal of the second DC-DC converter chip is connected to the output terminal of the DC-DC isolation module. The output terminal of the second DC-DC converter chip is connected to the input terminal of the converter chip, the UART interface of the RK3588 core board, the TYPEC interface of the RK3588 core board, the Arinc429 protocol transceiver chip, the Ethernet control chip, the Ethernet PHY chip, the HDMI input interface of the RK3588 core board, the HDMI output interface of the RK3588 core board, and the MIPI input interface of the RK3588 core board. The second DC-DC converter chip is used to convert the 12V voltage obtained from the DC-DC isolation module to a 3.3V voltage; The input terminal of the third DC-DC converter chip is connected to the output terminal of the DC-DC isolation module, and the output terminal of the third DC-DC converter chip is connected to the HDMI output interface and the TYPEC interface of the RK3588 core board. The third DC-DC converter chip is used to convert the 12V voltage obtained from the DC-DC isolation module into a 5V voltage.

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