详细说明利用并口模拟I2C总线协议，实现Myson MTV230芯片的在线编程（ISP）过程，以及利用PC机的串口通信实现Winbond W78E516B的在线编程（ISP）过程；阐述PC机的串口与并口在单片机开发中的应用。-Detailed descr iption of the use of parallel simulation of I2C bus protocol to achieve Myson MTV230 chip circuit programming (ISP) process, and the use of PC-Serial communication implementation Winbond W78E516B-line programming (ISP) process　described PC-Serial Port and the parallel development in the SCM applications.