This document specifies the characteristics of the fields to be provided for power and bi-directional communication between proximity coupling devices (PCDs) and proximity cards or objects (PICCs).
This document does not specify the means of generating coupling fields, nor the means of compliance with electromagnetic radiation and human exposure regulations, which can vary depending on the country.th edition 2020-07 Cards and security devices for personal identification — Contactless proximity objects — Part 2: Radio frequency power and signal interface Cartes et dispositifs de sécurité pour l'identification personnelle — Objets sans contact de proximité — Partie 2: Interface radiofréquence et des signaux de communication Reference number ISO/IEC 14443-2:2020(E) ？ ISO/IEC 2020 ISO/IEC 14443-2: 標(biāo)準(zhǔn)截圖