MFRC522 is RFID that can function both to read and write, Antenna is designed to be able to communicate with ISO ISO / IEC 14443 A / MIFARE cards and transponders without additional active circuitry. Receiver module can work well and efficiently for demodulation and decoding signals from the ISO / IEC 14443 A / MIFARE compatible cards and transponders. Digital module can manage with lenglap complete ISO / IEC 14443 A framing and correcting errors (parity and CRC).
Here is the link RFID datasheet that you can download. Hope it is useful,