《8051单片机基础教程》首先介绍了8051单片机的硬件、汇编语言、程序测试方法、基本I／O控制、中断控制、计时计数器控制、串行接口控制、A／D与D／A转换等土要内容，然后重点介绍了三个制作课题：LCD串行接口监视器、单片机电子钟、倒数计器。- Essentials 8051 First introduced 8051 hardware, assembly language, program testing methods, and basic I/O control, interrupt c

This an program for the 8051 for timer subsystem-This is an program for the 8051 for timer subsystem