The Design Of High-Power RFID System Based On TI S6700

The RFID technology introduces the LSI, identification and computer communication technology. It is made up of the reader and transponder mounted on the carrier and realizes the contactless identification and data information exchange of the carrier. The RFID technology has the advantages to be more quick, contactless, accurate and without pollution comparing with other identification technology.The author bring forward the devise scheme to design the new type reader based on the TI S6700 reader IC while getting full understanding of the relevant theories and fundamentals about the RFID system, thus to realize the data collection, storage, display and transmission across a long way and enhance the reading distance through adding power amplifier and improving the antenna design.The research contents of this paper includes as follows: firstly, design a new type reader based on TI S6700 reader IC and try to enhance the reading distance through adding power amplifier; secondly, adopt the idea of GPIO simulation to produce SPI timings to drive S6700.Secondly, overcome the shortcoming of general MCU SPI port; thirdly, design the RS232/RS485 full duplex conversion module, MMI interface in the system; fourthly, analyze the RFID system communication protocol ISO15693 and find out the working processes and realization of the instruction; lastly, discuss the communication safety and accidental factors including the checkout and collision design, illustrate the realization of CRC and anti-collision arithmetic theory.The designed RFID system has the features to be cheap and power saving and it has the friendly interface and high identification rate, thus has a promising respect in many fields.