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。
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