X1243工作原理及其I^2C通讯应用技术研究

The Principle of X1243 and Its Application Research in I^2C Communication

介绍美国Ｘｉｃｏｒ公司生产的串行实时时钟芯片Ｘ１２４３的功能及其工作原理，并以８９Ｃ２０５１单片机为例，给出了８９Ｃ２０５１和Ｘ１２４３通讯接口电路及其通讯程序的设计方法。Ｉ２Ｃ通讯接口电路具有高性能、低功耗、微型化和低价位的特点。该时钟源已成功地应用于集抄系统中。

The functions of serial real time clock/Calendar/ alarm chip X1243 Manufactured in Xicor corporation in American and its principles are introduced,and then a interface circuit between X1243 and 89C2051 microcomputer and operational programs are given as a example in the paper.PC communication interface has some specialty of high characteristic、low power consumption、miniaturization and low price.The chip has been applied to concentrated records successfully in power system.