Adopting RS-232C interface standard and asynchronous serialcommunication method, the overall scheme of the data communication system between the microcomputer in the ECU and a PC computer were designed.

• 采用RS-232C接口标准和串行异步通信方式，对ECU中的单片机与PC机之间的数据通信系统进行了总体方案设计和论证。