ISO/IEC 14443-3A (NFC-A)

ISO/IEC 14443-3A (NFC-A) defines the initialization and anti-collision mechanism for Type A contactless communication. Type A uses 100% ASK modulation with Modified Miller coding for reader-to-tag and Manchester coding with subcarrier load modulation for tag-to-reader. It is the basis for NFC Forum Type 1, Type 2, and Type 4 tags, including the entire NXP NTAG and MIFARE product families.