本课题通过MCS-51单片机来设计，采用汇编语言进行编程，可以实现以下一些功能：小时，分，秒和年，月，的显示、定时报警功能。本次设计的电子时钟系统由时钟电路，LCD显示电路，定时报警电路，按键调整电路四部分组成。-The subject of MCS-51 microcontroller through the design, assembly language programming, you can achieve the following features: hours, minutes, seconds, and year, month, display, timing alarm function. The design of the electronic clock system from the clock circuit, LCD display circuit, timing alarm circuit, the key adjustment circuit composed of four parts.