锁相环设计文档和一个可执行文件-PLL design documents and an executable file

AT89S5X系列单片机编程下载工具，界面简洁，非常好用。是单片机开发人员必备工具之一。-AT89S5X Series MCU Programming Tools download interface is simple and very handy. SCM is essential tools for the development of one of the officers.