设计一个以AT89S51单片机为核心的数字电子时钟控制器，实现电子时钟的时间、日期交替显示；有闹钟设置功能；并设计开关按钮或者键盘实现时间、日期的交替显示；可随机调整参数、设置闹钟。在单片机实验板上模拟调试实现数字电子时钟控制器的功能。-Design a AT89S51 microcontroller as the core of digital electronic clock controller, to achieve the electronic clock time, date alternate display　alarm clock setting function　and design of switching buttons or keyboard to achieve alternately displays the time, date　random adjustment parameters, set the alarm . In SCM experimental board Stager achieve functional digital electronic clock controller.