使用STC12C5410AD单片机作为开发系统实现简易闹钟、秒表、打铃小系统程序。包含实时时钟芯片HT1380控制，串口收发芯片STC232控制等。-STC12C5410AD the development of the use of single-chip system as simple alarm clock, stopwatch, playing small bell system procedures. Contains real-time clock chip HT1380 cont