设计采用AT89S52单片机为核心，结合12864液晶， DS1302，4*4行列式键盘等外围电路，通过程序组成一个带万年历，闹钟，秒表的多功能电子钟。-Design uses AT89S52 microcontroller as the core, combining 12864, DS1302, 4* 4 determinant keyboard and other peripheral circuits, through the formation of a program calendar, alarm clock, stopwatch with multi-functional electronic bell.