The Design And Development Of Contactless IC Card Reader

Contactless IC Card is one kind of new technology in the field of IC card,which is the combination of RF technology and IC card technology.Because contactless IC card has some advantages over common IC card such as its high working speed,good anticollsion quality,long working distance,there will be a good prospect for it in many fields such as automatic pricing,identity distinguishing,electric wallet,and so on.The contactless IC card reader is one of the key devices of a contactless IC card system.We developed one kind of contactless IC card reader,which is one part of a project and has about 25mm working distance.At first this paper generally introduces the contactless IC card,including its feature,type,international standard,key technology,typical usage and developing trendency.Then it introduces the RFID technology,from which the contactless IC card technology derived,and gives the compare of LEGIC technology and MIFARE technology,which are the representative technologies of contactless IC card technology at present.After that the MIFARE technology developed by PHILIPS Semiconductors is introduced in detail.The paper give emphasis to the introduction of MIFARE contactless IC card and the reader component,MFCM200.Based on these, the paper discusses the design of the contactless IC card reader in detail,inlcuding the circuit design and software design.The reader's circuit is made up of power supply circuit,LED circuit,buzzer drive circuit,RS232 communication circuit,MFCM200 interface circuit and antenna,all these circuits are layed on two PCB,control PCB and antenna PCB.The paper gives the whole process of circuit design in detail.The software design includes programing of MFCM200,programing of other circuit and programing of main program.All these programs are presented and remarked.