串行时钟芯片 DS1302及在喷灌控制器中应用

The Serial Clock Chip DS1302 and Its Application in The Spray Irrigation Controller

本文介绍了串行时钟芯片 ＤＳ１３０２的功能和工作原理，并给出 ＤＳ１３０２在灌溉控制器中与 ＡＴ８９Ｃ５１单片机的接口电路设计。ＤＳ１３０２具有体积小、与单片机接口简单的特点，还可以利用ＤＳ１３０２的内部 ＲＡＭ对现场数据进行保护，防止系统掉电后重要的数据丢失，使喷灌控制器的硬件设计简化。

This paper introduces the functions and work principles of serial clock chip DS1302, the design of interface circuit with AT89C51 single -chip microcomputer in the spray irrigation controller. DS1302 has the distinguishing features of small volume and simple interface with single-chip microcomputer, the internal RAM of DS1302 is utilized to protect the scene data, the loss of important data is avoided after the system loses power, the hardware design of spray irrigation controller is simplified.