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NXPMFRC5221356MHzRFID无接触读写方案

发布时间:2020-07-21 17:53:40 阅读: 来源:干电池厂家

NXP公司的MFRC522 是13.56 MHz 无接触通信的高度集成的读/写IC,支持ISO/IEC 14443 A/MIFARE模式,两个方向的传输速率高达848 kBd. MFRC522工作电压2.5V到3.3V,提供SPI,串行UART和I2C总线接口,具有CRC协处理器和可编程I/O引脚,内部有自测试.本文介绍MFRC522主要特性, 简化和详细方框图, 读/写模式, 总线接口图以及典型应用方框图.MFRC522: Contactless reader ICThe MFRC522 is a highly integrated reader/writer IC for contactless communication at 13.56 MHz. The MFRC522 reader supports ISO/IEC 14443 A/MIFARE e MFRC522’s internal transmitter is able to drive a reader/writer antenna designed to communicate with ISO/IEC 14443 A/MIFARE cards and transponders without additional active circuitry. The receiver module provides a robust and efficient implementation for demodulating and decoding signals from ISO/IEC 14443 A/MIFARE compatible cards and transponders. The digital module manages the complete ISO/IEC 14443 A framing and error detection (parity and CRC) e MFRC522 supports MF1xxS20, MF1xxS70 and MF1xxS50 products. The MFRC522 supports contactless communication and uses MIFARE higher transfer speeds up to 848 kBd in both e following host interfaces are provided:? Serial Peripheral Interface (SPI)? Serial UART (similar to RS232 with voltage levels dependant on pin voltage supply)? I2C-bus interfaceMFRC522主要特性:Highly integrated analog circuitry to demodulate and decode responsesBuffered output drivers for connecting an antenna with the minimum number of external componentsSupports ISO/IEC 14443 A/MIFARETypical operating distance in Read/Write mode up to 50 mm depending on the antenna size and tuningSupports MF1xxS20, MF1xxS70 and MF1xxS50 encryption in Read/Write modeSupports ISO/IEC 14443 A higher transfer speed communication up to 848 kBdSupports MFIN/MFOUTAdditional internal power supply to the smart card IC connected via MFIN/MFOUTSupported host interfacesSPI up to 10 Mbit/sI2C-bus interface up to 400 kBd in Fast mode, up to 3400 kBd in High-speed modeRS232 Serial UART up to 1228.8 kBd, with voltage levels dependant on pin voltage supplyFIFO buffer handles 64 byte send and receiveFlexible interrupt modesHard reset with low power functionPower-down by software modeProgrammable timerInternal oscillator for connection to 27.12 MHz quartz crystal2.5 V to 3.3 V power supplyCRC coprocessorProgrammable I/O pinsInternal self-test图RC522简化方框图图RC522详细方框图图RC522读/写模式图RC522 I2C总线接口图图IN和MFOUT信号路经图图RC522典型应用方框图详情请见: 物联网相关文章:物联网是什么

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