用C51语言编写的，能够在51单片机上运行的利用LCD12864和PCF8563显示年月日星期时间的实时时钟，包含完整project和全部源代码。-C51 language, can be run on 51 single-chip to use LCD12864 and PCF8563 real-time clock to display the date weeks, including the complete project and full source code.