基于AT89S2051单片机串行通信接口的I/O扩展技术研究  

Research on I/O extension technology of serial communication interface based on AT89S2051

作　　者：侯进旺[1] 杨晓晴[1] 

机构地区：[1]佛山职业技术学院,广东佛山528137

出　　处：《现代电子技术》2015年第7期160-162,共3页Modern Electronics Technique

摘　　要：白色智能家电产品多以单片机进行控制。这一类产品的特点是体积较小,需要外部输入的信息和对外输出的信息多,因此要求单片机体积小且I/O多。通过对基于单片机的串行通信接口与并入串出移位寄存器74LS166配合进行输入口扩展的关键技术进行研究,提出解决数据错位的方法。The white intelligent home appliances are often controlled by single chip microcomputer（MCU）. The characteristics of this kind of product is small size and more information from external input and to external output. Therefore,MCU with small in size and more I/O is required. In this paper,the serial communication interface based on AT89S2051 and parallel in serial out shift register 74LS166 are needed to research key technology of input interface extension. Some methods to solve data dislocation is put forward in this paper.

关 键 词：AT89S2051 数据错位 串行通信 74LS166 

分 类 号：TN95-34[电子电信—信号与信息处理] TP391.4[电子电信—信息与通信工程]