Table of Contents

RFID RC522

rc522-2.jpg

This is a very inexpensive RFID module with an MFRC522 integrated circuit and a PCB antenna.

Although the MFRC522 has I2C, serial and SPI interfaces, only SPI is available on this module.

Pinout

+-------------------------------------+
|              ANTENNA                |
|                                     |
| XTAL         NXPRC522               |
|                                     |
+ *SDA SCK MOSI MISO IRQ GND RST 3V3  +

*SDA is the SPI NSS (slave select) input.

RPi

Pin ALT RFID RC522
GPIO8 CE0 SDA
GPIO11SCLK SCK
GPIO10MOSI MOSI
GPIO9 MISO MISO
IRQ
GND GND
GPIO25 RST
3V3 3V3

Resources

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