The design process considers that during the low-level control process of parking and parking, the two key heat-generating chips may generate a large amount of heat. Therefore, two MPUs are placed on the main board and the sub-board respectively. Also, the MCU is placed on the motherboard. The main board and sub-board are connected to the external Ethernet communication terminal through the Ethernet Switch, and the control and configuration of the entire Ethernet Switch are completed by the MCU. The Ethernet Switch can directly connect multiple 1000BASE-T1 and 100BASE-TX interfaces. At the same time, the Switch is also connected to the external expansion PHY through the SGMII port, which can lead to multiple 1000BASE-T1 ports. For the actual communication connection process, the information merging through the multi-in-one connector can be fully considered, and the undervoltage monitoring, overtemperature detection, and SQI reading capabilities can be fully considered during the design process.
When designing the VDC, it is also necessary to use the N-way CAN communication required for the associated ECU communication and be compatible with CAN-FD. The CAN-FD interface circuit adopts the standard CAN interface circuit, which supports ESD protection and terminal matching. Each channel of CAN communication needs a corresponding terminal matching resistor. , and reserve a common mode inductance of a certain size, and selectively carry out patching according to the actual EMC measurement results. The most important thing is to support any frame CAN wake-up function.