这是一个基于51单片机的DS1302_实时时钟驱动程序，来源于我自己买的开发版，我有用过绝对没问题的。,This is a single chip based on 51 real-time clock DS1302_ driver, from the development to buy my own version, I have used absolutely no problem.

DS1302实时时钟芯片（RTC）的中文技术文档,DS1302

ds1302时钟芯片电压可以在2~5.5VFANGWEI -DS1302 clock chip voltage can be in the 2 ~ 5.5VFANGWEI