The FM17522 is a highly integrated Transceiver IC for Contactless communication at 13.56MHz.
The FM17522 Transceiver IC support Reader/Writer mode supporting ISO14443A protocal.
The FM17522’s internal transmitter part is able to drive a reader/writer antenna designed to communicate with ISO/IEC14443A cards and transponders without additional active circuitry. The receiver part provides a robust and efficient implementation of a demodulation and decoding circuitry for signals from ISO/IEC14443A compatible cards and transponders. The digital part handles the complete ISO/IEC 14443A framing and error detection. The FM17522 supports ISO/IEC14443A cards and transponders with transfer speeds from 106kbit/s to 424kbit/s in both directions.

1.1 Introduction
The FM17522 is a highly integrated Transceiver IC for Contactless communication at 13.56MHz. The FM17522 Transceiver IC support Reader/Writer mode supporting ISO14443A protocal. The FM17522’s internal transmitter part is able to drive a reader/writer antenna designed to communicate with ISO/IEC14443A cards and transponders without additional active circuitry. The receiver part provides a robust and efficient implementation of a demodulation and decoding circuitry for signals from ISO/IEC14443A compatible cards and transponders. The digital part handles the complete ISO/IEC 14443A framing and error detection. The FM17522 supports ISO/IEC14443A cards and transponders with transfer speeds from 106kbit/s to 424kbit/s in both directions.

1.2 Features
Supports ISO14443A reader/writer mode
•ISO/IEC14443A 106kbit/s and higher transfer speed at 212kbit/s and 424kbit/s
•Typical operating distance in reader/writer mode for communication to a ISO14443A card up to 50mm (depending on the antenna size and tuning)
Supports host interfaces
•SPI interface up to 10Mbit/s
•I2C interface up to 400kbit/s in Fast Mode , and up to 3400kbit/s in High Speed Mode
•Serial UART in different transfer speeds up to 1228.8kbit/s, framing according to theRS232 interface with voltage levels according pad voltage supply
Comfortable 64 byte send and receive FIFO-buffer
Flexible interrupt modes
Multiple low-power modes
•Soft power down mode
•Hard power down mode
•Deep power down mode (typical 1uA)
Low Power external Card Detect (LPCD) at Reader/writer mode
Programmable timer
Internal oscillator to connect 27.12MHz quartz
Wide voltage supply: 2.2V ~ 3.6V
Integrated CRC Co-processor
Programmable I/O pins