The PN532 is a highly integrated transmission module for contactless communication at 13.56 MHz including microcontroller functionality based on an 80C51 core with 40 Kbytes of ROM and 1 Kbytes of RAM. The PN532 combines a modulation and demodulation concept completely integrated for different kinds of contactless communication methods and protocols at 13.56 MHz with easy-to-use firmware for the different supported modes and the required host controller interfaces.

It works as an RFID reader/writer,1443-A card, or a virtual card and also supports NFC with Android phones. It is also compatible with Arduino.

Features:

1. Support II2, SPI and HSU (High-Speed UART)
2. I2C / UART: 3.3V ~ 24V TTL
3. SPI: 3.3V TTL with 100-ohm resistors in series
4. Communication distance: 5cm~7cm
5. On-board level shifter, Standard 5V TTL for I2C and UART, 3.3V TTL SPI
6. Work in NFC Mode or RFID reader/writer Mode
7. RFID reader/writer supports:
8. Plug and play, compatible
9. Built-in PCB Antenna, with 4cm~6cm communication distance
10. On-board level shifter, Standard 5V TTL for I2C and UART, 3.3V TTL SPI
11. Work as an RFID reader/writer
12. Work as a 1443-A card or a virtual card
13. Exchange data with other NFC devices such as a smartphone