2007版的ISO/IEC 14443协议，主要增加A/B模式下高速（212k，424k，848k）通信模式。-2007 version of ISO/IEC 14443 protocol, the main change is adding A/B mode high-speed (212k, 424k, 848k) communication mode.

USB资料 适于初学者 很不错 EZ_USB FX2 gpif模式 高速数据传输-USB data is suitable for beginners to very good EZ_USB FX2 gpif speed data transmission mode

stm32f4 高速USB驱动，可实现高速，全速及低速模式。-stm32f4 Speed ​ ​ USB drive, enabling high-speed, full-speed and low-speed mode.