Many Standard High Frequency Rfid Read-write Device Design

With the development of society, the radio frequency identification technology(RFID, Radio Frequency Identification) plays an increasingly important role in howpeople work and life.It Widely used in the field of industrial products management,access control, public transportation-consumption, and vehicle detection. In our country,the low-frequency and high-frequency RFID technology is relatively mature,and occupythe in part of the market,UHF and microwave-frequencies is still in the exploration andrapid development of the process.But the high-frequency RFID technology can beapplied innovation, and design a supportfor high-performance, low-cost, multi-standardprotocol compatible reader, rich in domestic high-frequency RFID reader.Though a library management system high frequency (HF, High Frequency) readerdevelopmentinstance, this article describes the hardware and software design method ofmulti-standard high-frequency RFID reader system.This article first introduced the history and current status of the RFID technology.Subsequently began to introduce the working principle of the HF RFID system and highfrequency RFID standard protocols.And then analyze the functional needs of the reader,the selection of the core chip designreader hardware architecture and softwaresoluteions, where the process or to select a STC89C516RD+RF chip selected NXP’sRC632. Then design the circuit schematic and PCB layout of the reader system. Designof the reader software, including the overall flow chart of the program, each module ofthedriver, the menu interface programming, multi-protocol adaptive procedures. Aftercompleting the hardware and software design, Introduction the reader systemcommissioning steps and methods, and gives the test results. The test results show thatthe multi-standard high-frequency RFID reader designed to meet the expected target,Compared with products on the marke, It have the same tag identification performancecheaper price, Basic formation of the product.