这是基于small rtos操作系统的在51系列单片机上实现的一个数字钟，用proteus仿真实现，用原理图，可以在硬件上直接运行，但必须注意要用89S52或者更大ram的芯片。-This is based on small rtos operating system in the 51 series microcontroller implemented on a digital clock, with proteus simulation to achieve, with schematic

基于89S52的多功能数字钟汇编源码，内有注释，适合单片机初学者参考阅读-89S52-based multifunctional digital clock assembler source code, there are notes, suitable for beginners SCM reference reading

基于89s52的6位数码管电子钟,实现基本及时功能，同时具备秒表、调时功能-Based 89s52 of six digital electronic clock, the timely realization of the basic functions, along with a stopwatch, time transfer function