原创 关于NXP MFRC522

金木雨电子有限公司利用MFRC522，开发一款性能优秀的射频模块。模块采用天线模块分离的设计方法，使得开发者能根据自己的需求来设计天线进而达到理想的读卡距离。

PCD model: NXP MF RC522

Working frequency: 13.56MHz

Card supported: Mifare 1K/4K, FM11RF08, Ultra Light, DesFire, Mifare ProX, T=CL smart card(ISO14443)

Anti collision ability: Full function of anti-collision; be able to process multi-cards; be able to set operate single card only

Auto detecting card: Supported, default OFF

EEPROM: 512 Bytes

Power supply:  DC 5V

Interface: IIC & UART (selected by SPS pin, recommend to use IIC)

Communication rate: IIC-400Kbps; UART-19.2Kbps/115.2Kbps

Max. command length: 253 Bytes

Interface level: 3.3V (TTL level; 5V tolerance)

Power consumption: 50mA

Reading range: 80mm (depending on card and antenna design)

Dimension: 21mm * 42mm

Package: DIP32

Weight: About 15g

ISP:  Yes

Operating temperature: -25 to +85 °C

Storage temperature: -40 to +125 °C

RoHS: Compliant

Antenna

TX500, size: 70mm*70mm, 90mm reading range

TX501, size: 50mm*50mm, 70mm reading range

TX502, size: 30mm*30mm, 60mm reading range

Offer OEM/ODM service

附：一篇关于MFRC522芯片的介绍，先分享下。

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 IC

The MFRC522 is a highly integrated reader/writer IC for contactless communication at 13.56 MHz. The MFRC522 reader supports ISO/IEC 14443 A/MIFARE mode.The 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) functionality.

The MFRC522 supports MF1xxS20, MF1xxS70 and MF1xxS50 products. The MFRC522 supports contactless communication and uses MIFARE higher transfer speeds up to 848 kBd in both directions.

The following host interfaces are provided:

? Serial Peripheral Interface (SPI)

? Serial UART (similar to RS232 with voltage levels dependant on pin voltage supply)

? I2C-bus interface

MFRC522主要特性:

Highly integrated analog circuitry to demodulate and decode responses

Buffered output drivers for connecting an antenna with the minimum number of external components

Supports ISO/IEC 14443 A/MIFARE

Typical operating distance in Read/Write mode up to 50 mm depending on the antenna size and tuning

Supports MF1xxS20, MF1xxS70 and MF1xxS50 encryption in Read/Write mode

Supports ISO/IEC 14443 A higher transfer speed communication up to 848 kBd

Supports MFIN/MFOUT

Additional internal power supply to the smart card IC connected via MFIN/MFOUT

Supported host interfaces

SPI up to 10 Mbit/s

I2C-bus interface up to 400 kBd in Fast mode, up to 3400 kBd in High-speed mode

RS232 Serial UART up to 1228.8 kBd, with voltage levels dependant on pin voltage supply

FIFO buffer handles 64 byte send and receive

Flexible interrupt modes

Hard reset with low power function

Power-down by software mode

Programmable timer

Internal oscillator for connection to 27.12 MHz quartz crystal

2.5 V to 3.3 V power supply

CRC coprocessor

Programmable I/O pins

Internal self-test


图1.MFRC522简化方框图（略）

图2.MFRC522详细方框图（略）

图3.MFRC522读/写模式（略）

图4.MFRC522 I2C总线接口图（略）

图5.MFIN和MFOUT信号路经图（略）

图6.MFRC522典型应用方框图（略）