Design And Verification Of Baseband For NFC Anti-Forgery Sensing Label Chip For IoT Nodes

Near Field Communication(NFC)technology is evolved from the integration of non-contact radio frequency identification(RFID)technology and interconnection technology.It has the characteristics of fast speed,good security,and excellent anti-interference ability.In recent years,NFC technology has been widely used in packaging box technology.The addition of NFC technology has made packaging boxes more user-friendly,making human-computer interaction more convenient,and also prompting smart packaging to gradually be applied to the field of Internet of Things.However,the current NFC anti-counterfeiting measures in practical applications have shortcomings such as easy forgery and easy transfer,which cannot play a real anti-counterfeiting effect,and can not meet the high-quality traceability requirements.At the same time,as the application field of NFC technology continues to expand,it has gradually emerged in the field of industrial control.The application of NFC technology is expected to solve the problems of traditional wireless sensor networks that are complex to build,difficult to manage,and high power consumption.In view of the characteristics of NFC technology and the needs of existing application scenarios,this paper proposes an anti-counterfeiting solution that realizes tamper-proof detection by detecting the on-off of pins.Under this scheme,the tag chip is sensitive and memorable to pin on-off actions,It can make up for the shortcomings of the existing NFC technology in anti-counterfeiting.At the same time,this article combines NFC tags and sensors to realize the collection and quantification of temperature and pressure information,which further promotes the wide application of NFC technology in the field of industrial control.Based on the near field communication protocol ISO/IEC 14443,this paper designs the digital baseband of label chip,completes the collection and quantification of temperature information through on-chip temperature sensor circuit,completes the collection and quantification of pressure information through off-chip pressure sensor and on-chip capacitance sensor circuit,and realizes the anti-forgery function of tamper detection by detecting pin interruption.After the analysis and interpretation of the protocol,combined with the anti-forgery and sensor implementation scheme,this paper presents a low-power digital baseband implementation method,divides the digital baseband into functional modules,uses Verilog language to code each module of the digital baseband,verifies the functional correctness of the code through simulation;The board-level validation of digital baseband code is completed by using the development board of the FPGA and commercial NFC reader,which further ensures the correctness and reliability of the design.At the same time,this paper uses TCL language to write scripts under the TSMC 180nm process,and uses a low-power comprehensive strategy to complete the logical synthesis of the digital baseband code.After synthesis,the area of the digital baseband is 36714.7?m~2,and the power consumption is 21.1?W.The physical implementation of the digital baseband is completed using EDA tools such as Encounter.After the tape-out is completed,the communication function,anti-forgery detection function,temperature sensor and pressure sensor function of the chip are tested.The chip can correctly respond to the wake-up command,anti-collision command,UID lock command,active command and read-write command.The test results meet the design and system requirements.