USB接口类型的描述以及定义，图文版，包含各种以前的和现行的USB接口的图片和口线顺序-USB interface type descr iptions and definitions, facsimile edition, contains a variety of previous and current images and the USB interface port line order

STC单片机基于USB口驱动，里面详细介绍了基于STC单片机基于USB口的驱动设计。-On STC microcontroller based on USB drive, it was introduced in detail based on STC microcontroller driven design based on USB port