ISO/IEC 14443-3:2018本文件描述如下:
-轮询进入接近耦合装置（PCD）场的接近卡或物体（PICC）
-PCD和PICC之间通信初始阶段使用的字节格式、帧和定时
-初始请求和应答请求命令内容
-方法在多个PICC中检测一个PICC并与之通信（防碰撞）
-初始化PICC和PCD之间通信所需的其他参数
-可选方式，用于根据应用标准简化和加快在多个PICC中选择一个PICC
-可选功能，允许设备在PICC和PCD的功能之间切换，以分别与PCD或PICC通信。 实现这种功能的设备称为PXD
ISO/IEC 14443-4中描述了高层和应用程序使用的协议和命令，以及初始阶段后使用的协议和命令
本文件适用于A型和B型PICC（如ISO/IEC 14443-2所述）、PCD（如ISO/IEC 14443-2所述）和PXD
注1:ISO/IEC 14443-2中定义了部分数据通信定时
注2:ISO/IEC 10373-6中定义了本文件的试验方法。

ISO/IEC 14443-3:2018 This document describes the following:
- polling for proximity cards or objects (PICCs) entering the field of a proximity coupling device (PCD);
- the byte format, the frames and timing used during the initial phase of communication between PCDs and PICCs;
- the initial Request and Answer to Request command content;
- methods to detect and communicate with one PICC among several PICCs (anticollision);
- other parameters required to initialize communications between a PICC and PCD;
- optional means to ease and speed up the selection of one PICC among several PICCs based on application criteria;
- optional capability to allow a device to alternate between the functions of a PICC and a PCD to communicate with a PCD or a PICC, respectively. A device which implements this capability is called a PXD.
Protocol and commands used by higher layers and by applications and which are used after the initial phase are described in ISO/IEC 14443？4.
This document is applicable to PICCs of Type A and of Type B (as described in ISO/IEC 14443？2), to PCDs (as described in ISO/IEC 14443？2) and to PXDs.
NOTE 1 Part of the timing of data communication is defined in ISO/IEC 14443？2.
NOTE 2 Test methods for this document are defined in ISO/IEC 10373？6.