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新型时钟芯片DS12C887具有计时精确、断电情况下运行十年以上不丢失资料等优点,在单片机计时系统中有着广泛应用。本文分析了DS12C887的功能特性,介绍了DS12C887与AT89C51单片机系统的硬件电路图,同时介绍了单片机应用程序的编写方法。
The new DS12C887 clock chip has the advantages of accurate timing, no data loss and more than 10 years of operation in the case of a power failure, and is widely used in the timing system of a single chip microcomputer. This text has analyzed the function characteristic of DS12C887, introduced the hardware circuit diagram of DS12C887 and AT89C51 one-chip computer system, meanwhile introduced the preparation method of one-chip computer application program.