基于IIC总线的键盘读取  

Reading Keyboard Based on IIC Bus

作　　者：徐广振[1] 张茂青[1] 王力[1] 黄颖[1] 

机构地区：[1]苏州大学机电工程学院,江苏苏州215021

出　　处：《江苏电器》2007年第4期43-45,50,共4页

摘　　要：介绍了IIC总线的基本概念和工作原理,叙述了IIC总线扩展芯片PCF8575的功能特点。在以LPC2148为微控制器,PCF8575芯片为IIC总线扩展的基础上,介绍了通过IIC总线读取键盘的硬件、软件设计,并得出结论。体现了IIC总线在嵌入式系统设计应用中的重要作用。Introduces the basal conception and working principle of the IIC bus, and describes the functions and characters of the PCF8575 expanded from IIC bus. Furthermore, the paper introduces the hardware and software design of reading the keyboard via the IIC bus, which is based on the LPC2148 microcontroller and the PCF8575 expanded from IIC bus, and gains a conclusion. The paper embodies an important function in designing and applying the embedded system.

关 键 词：IIC总线 嵌入式系统 键盘 LPC2148微控制器 PCF8575芯片 

分 类 号：TP334.2[自动化与计算机技术—计算机系统结构]