The MF RC500 is member of a new family of highly integrated reader ICs for contactless communication on 13,56MHz. This new reader IC family utilises an outstanding modulation and demodulation concept completely integrated for all major kinds of passive contactless communication methods and protocols on 13,56MHz. The MF RC500 supports all layers of ISO14443A. The internal transmitter part is able to drive a proximity antenna (up to 100mm) directly without additional active circuitry. The receiver part provides a robust and efficient implementation of a demodulation and decoding circuitry for signals of ISO14443A compatible transponders. The digital part handles ISO 14443A framing and error detection (Parity & CRC). Additionally it supports the fast CRYPTO 1 stream cipher to authenticate MIFAREÒ Classic (MIFARE® Standard, MIFARE® Light) products. A comfortable parallel interface which can be directly connected to any 8-bit μController gives high flexibility for Reader / Terminal design. 1.2 Features · Highly integrated analog circuitry to decode card response · Buffered output drivers to connect an antenna with minimum number of external components · Proximity operating distance (up to 100 mm) · Fast internal oscillator buffer to connect 13.56 MHz quartz · Clock frequency monitoring · Hard reset with low power functions · Power down mode per software