目前金融卡读写器主要采用RS232或RS422有线通信方式与PC终端设备通信,接口相对单一,传输速率慢,同时也不能远程监控主机进行无线通信,限制了读写器的网络化。MF-RC500是Philips公司为MIFARE(M1)射频卡设计的专用读卡器芯片,它应用于13.56 MHz非接触式通信中。利用射频识别技术开发的基于MF-RC500读卡器系统的工作方式是由MCU控制MF-RC500驱动天线对Mifare卡进行读写操作,然后通过USB与PC通信,把数据传给上位机。读写模块MFRC500是整个读写器的核心。作为MCU与射频卡通讯的中介,MF-RC500与M1卡由射频场来建立无线链接并完成数据交换。本文提出的设计相对于目前应用于金融领域的读卡器加强了安全保密性,同时与主机相连采用USB接口,增加了便捷性及扩展性。
At present tile reader-and-writer mainly use RS232 or RS422 wired communication with the PC terminal equipment, however the interface is relatively simple and the transfer rate is slow, which can not remotly monitor the host and Ihe reader's networking is limited. MF-RC500 is the dedicated reader chip of Philips MIFARE ( MI ) RF card and is applied to 13.56 MHz non-contact communications. The working method of the MF-RC500 reader system based on the radio frequency identification technology is controlled by the MCU to read and write the Mifare card, then to communicate with the PC. MF RC500 is the core of the reader-and-writer. As the MCU and RF card's communication intermedi;u'y, MF-RC500 M1 card using the RF field established a wireless link and completed the data exchange. The design presented by this paper strengthens the confidentiality security and increases the convenience and sealability.