摘要：IC卡是目前广泛应用于访问控制和电子票据的一种智能卡。本文主要介绍了一种简易的IC卡读写终端的设计。论文介绍了实现IC卡数据存储的控制方法，并以西门子公司的SLE4442型逻辑加密卡为基础．详细分析了单片机控制IC卡数据读写的软、硬件实现。

　　本文采用AT89S52单片机设计了一个简易接触式IC卡控制系统，该系统可以对SLE4442进行读写。配合不同的软件及外围扩展电路，该系统可以应用到电业管理、燃气收费等不同的行业。还介绍了SLE4442芯片的特点、存储器结构，以及该芯片与单片机的最基本连接，分析了SLE4442逻辑加密存储卡的操作过程和AT89S52单片机的控制程序。

关键词：接触式IC卡；单片机；读写终端

Abstract：At present，the IC card is a kind of intelligent card applying to visit controlling and electronic note extensively．This paper has introduced the designing of a simple type IC card read-write terminal mainly． First of all，proceeding with the International Standard of IC cards，the paper has introduced the reading and writing technique of  IC card data． On the base of SLE4442-a kind of smart card of security logic made by SIEMENS． The paper has specified the software and hardware realization of IC card data reading and writing．

　　A simple control system for intelligent contact type IC card is presented with AT89S52，which is capable to read and write the logically encrypted memory card SLE4442．With some adaptations in software and peripheral circuits，the system could be easily used in various fields．Such as power charging system and gas charging system．The paper also has introduced the characteristic of the SLE4442 chip，the structure of storage，and the most essential connection between SLE442 chip and single chip processor．Moreover，the method how to use the system ，the problem of programming，and the flow chart of the system program of some interrelated commands have also been illustrated in the paper．

Key words: contact type IC card； single chip processor；read-write terminal