单片机开发板演示程序 1602晶体:12M MCU：STC89S51，52orAT89系-Single-chip development board demo 1602 Crystal: 12M MCU: STC89S51, 52orAT89 Department

实现52单片机数字钟功能，利用1602液晶屏具有显示年、月、日、周和小时、分、秒及闹钟作用-Achieve 52 microcontroller digital clock function, using 1602 LCD screen has a display year, month, day, week, and hour, minute, second and alarm function