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--- interfaces:rc522 [2015/02/10 17:36]
darron [RFID RC522]
+++ interfaces:rc522 [2015/03/22 21:55] (current)
@@ Line 1: / Line 1: @@
 ==== RFID RC522 ====
+<wrap right>
+{{:interfaces:rc522-2.jpg?200}}
+</wrap>
-This is a very inexpensive RFID module with an RC522 integrated circuit
+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 ===
 <code>
-+-----------------------------------+
++-------------------------------------+
-|             ANTENNA               |
+|              ANTENNA                |
-|                                   |
+|                                     |
-+-SDA SCK MOSI MISO IRQ GND RST 3V3-+
+| XTAL         NXPRC522               |
+|                                     |
++ *SDA SCK MOSI MISO IRQ GND RST 3V3  +
+*SDA is the SPI NSS (slave select) input.
 </code>
+=== RPi ===
+^Pin   ^ALT  ^RFID RC522 |
+|GPIO8 |CE0  | SDA  |
+|GPIO11|SCLK | SCK |
+|GPIO10|MOSI | MOSI |
+|GPIO9 |MISO | MISO |
+|      |     | IRQ  |
+|GND   |     | GND  |
+|GPIO25|     | RST  |
+|3V3   |     | 3V3  |
+=== Resources ===
+[[http://www.nxp.com/documents/data_sheet/MFRC522.pdf|Data-sheet]]