iso-7816协议的模拟实现，即使单片机没有智能卡接口，也可以使用GPIO模拟实现该协议控制智能卡-iso-7816 protocol simulation, even if the single-chip smart card interface can also use the GPIO analog implementation of the protocol control smart card

这是关于RFID的通信协议，可直接应用。-This is on the RFID communication protocol can be applied directly.

iso7816中文文档，适合SAM开发时做参考-iso7816 Chinese documents, for a reference when developing SAM

ISO 7816协议中文版，接触式IC卡开发参考-ISO7816 protocol that the Chinese version, contactless IC card Development Reference