基于MSC51的数字钟。采用PCF8563作为日历芯片，ZLG7290显示和键盘控制。具有5个闹钟源。同时可以修改报时时间和报时音效和LED灯效。-MSC51-based digital clock. PCF8563 chip used as a calendar, ZLG7290 display and keyboard control. Clock source has a 5. At the same time, time can be amended time and time effi