The Design And Application Of Read & Write Module Of Radio Frequency Identification (RFID) IC Card

With the rapid development of electronic information technology, smart cards (IC card) are now very popular in our life. Radio Frequency Identification (RFID) card is becoming a new fashion in the application field of smart card, replacing the traditional contacting IC card. So it is of great practical significance to study the technology of RFID Card and develop the read&write device of RFID card for its generalization.The common concept of the RFID card and the basic working principle of RFID system are explained chiefly in the first part of this paper. Then, a read&write module of Mifarel RFID card is developed, based on the modular designing mind. The users of application system may develop their practical products rapidly with our module without understanding the details of RFID technology. The read&write module can not only do the control and read&write operations of the RFID card, but also can be redeveloped. The way to implement the read&write module is discussed in detail, including two parts, the hardware and the software. The former part includes the constitutes of the system, the design of the interface between MCU and the chip of RFID module, and the realization of the hardware circuits. And the latter mainly introduces how to drive the RFID communication and encapsulate the operation of the card into functions which can be transferred by the customers conveniently. The functions are irralated with hardware by doing its encapsulation according to the rules of software engineering. Then, two application examples based on read&write module are given, one is a general read&write device and the other is a check-in machine with network interface.At last, all the work are summarized and a research prospect of the subject in future is promised.