采用MSC-51系列单片机AT89C52作为中央处理器，以AT24XX系列芯片为存储卡。键盘采用4x4行列式键盘，显示模块采用LED七段数码显示管。选择51单片机来控制整个电路，单片机和IC卡、按键、显示管连接。用单片机来读取IC卡信息，单片机一直在扫描按键,若有按键单片机则感应到并对IC卡的内容进行查询或者修改，单片机此时也通过显示电路来显示IC卡正在修改的信息或是查询的信息。-The use of MSC-51 Series MCU AT89C52 as a central processing unit to AT24XX series of chips for the memory card. 4x4 determinant using keyboard keyboard, Seven-Segment LED display module using a digital display tube. 51 single-chip microcomputer to control the selection of the circuit, single-chip and IC card, button, display tube connection. MCU to read the IC card information, microcontroller has been scanning button, if keys are single-chip sensor and the IC card to query or modify the content, single-chip at this time through the display circuit to display the IC card in the process of amending the information or query information.