51单片机串行口扩展电路设计及其应用  

The design and application of extended electrocircuit in serial port of 51 Single Chip Micyoco(SCM)

作　　者：刘星华[1] 

机构地区：[1]福建工程学院,福建福州350014

出　　处：《山东轻工业学院学报（自然科学版）》2007年第2期59-62,共4页Journal of Shandong Polytechnic University

摘　　要：在以单片机为核心的多级分布式系统中,常常需要扩展单片机的串行口。本文主要介绍了基于SP2338和SP2538专用串行口扩展芯片,对单片机的串行口的扩展进行设计,实现一扩七的功能,并给出了实际的硬件电路及其在水厂监控系统中的应用。The extended SCM serial port is needed in the SCM-centered multilevel distributing system. Based on the research on extended chips in the SP2338 and SP2538 special serial ports, the paper makes the introduction of how to extend the serial port of SCM and realize the function of one to seven extending. It also shows hardware circuit and program flow charts for supervision system in the waterworks.

关 键 词：单片机 串口扩展 一扩七 

分 类 号：TH86[机械工程—仪器科学与技术]