This is to introduce the features and primary functions of real time of chip DS12887, which is designed by Dallas Company, as well as the circuit device of MCS-51 System. The system proved to be econmical in terms of power consumption.

• 主要介绍了DALLAS公司的实时时钟芯片DS12887的主要特性、基本功能,以及与MCS-51系统的硬件电路设计,并经试验证明,系统有较好的节能效果。