基于I^2C总线的多MCU系统设计  

Design of multi-MCU system based on I^2C bus

作　　者：李晶[1] 吕肖晗 

机构地区：[1]孝感供电公司客户服务中心计量室,湖北孝感432100 [2]襄阳海特测控技术有限公司,湖北襄阳441000

出　　处：《现代电子技术》2015年第9期16-18,24,共4页Modern Electronics Technique

摘　　要：在一些应用系统中常常使用多片MCU协同实现系统功能,为实现多片MCU之间的数据交换,可以应用多端口RAM,但其结构复杂,成本高;而利用I2C总线使多片MCU之间通过RAM实现数据交换,具有结构简单、成本低的优点。介绍一种基于I2C总线的多MCU系统的设计,简要讨论I2C总线的结构、工作原理及多MCU竞争仲裁,给出I2C总线的多MCU系统的设计,实现了多MCU系统在实际中的应用。System functions are implemented by multi-MCU collaborative working in some application systems. Although the multi-port RAM can be applied to achieve data exchange among multiple MCUs,its structure is complex and cost is high. Multi-MCU data exchange can be realized by the method to link I2C bus with RAM,which has the advantages of simple struc-ture and low cost. Design of the multi-MCU system based on I2C bus is introduced. The structure,execution principle,multi-MCU competition and arbitration of I2C bus are discussed briefly. The design of multi-MCU system based on I2C bus is given. The application of multi-MCU system in practice was implemented.

关 键 词：I2C总线 多MCU系统 P89LPC932 数据交换 

分 类 号：TN915-04[电子电信—通信与信息系统]