The design of the communication module of the electronic control system unit is based on the bus protocol and communication principle. The electronic control system design of the device is mainly composed of a bus transceiver and a microcontroller, an independent bus interface and some peripheral circuits. The general communication system uses the FPGA module of the PCI chip to control the MFR4310, and realizes the data transmission of the bus node through the TJA1080 chip, but this communication system uses a large volume, high cost, and complex hardware circuit modules.