Datasheet

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Guide Contents
Guide Contents
Overview
Breakout Wiring
Wiring the Breakout for SPI
Shield Wiring
Solder the Headers
Using the Adafruit NFC Shield with I2C
Using with the Arduino Leonardo and Yun
Arduino Library
Which Library?
Library Installation
Testing MiFare
About NFC
NFC (Near Field Communication)
Passive Communication: ISO14443A Cards (Mifare, etc.)
Active Communication (Peer-to-Peer)
NFC Data Exchange Format (NDEF)
Reading
MiFare Cards & Tags
MiFare Classic Cards
EEPROM Memory
4 Block Sectors
16 Block Sectors
Accessing EEPROM Memory
Note on Authentication
Example of a New Mifare Classic 1K Card
MiFare Ultralight Cards
EEPROM Memory
Lock Bytes (Page 2)
OTP Bytes (Page 3)
Data Pages (Page 4-15)
Accessing Data Blocks
Read/Write Lengths
About the NDEF Format
NDEF (NFC Data Exchange Format)
NDEF Messages
NDEF Records
Record Header (Byte 0)
Type Length
Payload Length
ID Length
Record Type
Record ID
Payload
Well-Known Records (TNF Record Type 0x01)
URI Records (0x55/'U')
Test Records
© Adafruit Industries https://learn.adafruit.com/adafruit-pn532-rfid-nfc Page 2 of 42