BS ISO/IEC 14443-4:2018+A2:2020 - Page 2

Cards and security devices for personal identification. Contactless proximity objects. Transmission protocol | Status: Current

1 Scope This document specifies a half-duplex block transmission protocol featuring the special needs of a contactless environment and defines the activation and deactivation of the protocol. This document is intended to be used in conjunction with other parts of ISO/IEC 14443 and is applicable to proximity cards or objects of Type A and Type B.