对于一个单片机初者来说一定想自己设计一个小系统吧··这里提供了以89S52为核的小系统图和源程序！希望对刚学者有所帮助-early for a microcontroller were necessarily want to run their own small design a system here to provide it with nuclear 89S52 for the smaller system map and the source! Just want to help sc