Historical
INCITS/ISO/IEC 14443-4-2001 (R2006)
Identification Cards - Contactless Integrated Circuit(s) Cards - Proximity Cards - Part 4: Transmission Protocol (formerly ANSI/ISO/IEC 14443-4:2001)
Specifies a half-duplex block transmission protocol featuring the special needs of a contactless environment and defines the activation and deactivation sequence of the protocol. This part of ISO/IEC 14443 is intended to be used in conjunction with other parts of ISO/IEC 14443 and is applicable to proximity cards of Type A and Type B.
InterNational Committee for Information Technology Standards [incits]