电能计量芯片ATT7022B的通信研究与实现  

Research and implement of energy metering IC ATT7022B communication

作　　者：李静[1] 陈永泰[1] 

机构地区：[1]武汉理工大学信息工程学院,武汉430070

出　　处：《电子测量技术》2008年第5期88-90,94,共4页Electronic Measurement Technology

摘　　要：以电能计量芯片ATT7022B为例,详细分析了SPI总线接口的工作原理和特点。并运用软件模拟SPI总线时序的方法,解决电能计量芯片ATT7022B与ARM7系列中的EP7312的通信接口时序不匹配的问题,并成功实现两者的通信。文中将ATT7022B与EP7312直接相连,方便地实现了高速串行数据的传输,并给出了SPI的接口电路及软件设计流程图。设计完成后经测试证明,该方案完全满足SPI协议串行数据传输的要求,结构简单、性能可靠、具有较高的应用价值。The paper takes energy metering IC ATT7022B as an example to analyze characteristics and theory of SPI bus interface in details. It provides how to use software to resolve the time sequence mismatching problem and implement the communication between ATT7022B and the chip of EP7312. The ATT7022B and EP7312 can be connected directly through SPI bus, and conveniently realizes high speed serial data transmission. The interface circuit and software design of SPI are also offered in this paper. The test results indicate that the design meets the demand of SPI protocol for serial data transfer, has the characteristics of simple hardware architecture, and is reliable in performance. It has high practical value.

关 键 词：SPI接口 时序逻辑 电量采集 

分 类 号：TP336[自动化与计算机技术—计算机系统结构] TP274.2[自动化与计算机技术—计算机科学与技术]