USB 知識整理合輯
USB基礎知識概論
http://www.crifan.com/files/doc/docbook/usb_basic/release/htmls/
USB (Universal Serial Bus)
http://wiki.csie.ncku.edu.tw/embedded/USB
http://en.wikipedia.org/wiki/USB#Overview
USB引腳定義
http://blog.csdn.net/sdvch/article/details/5911669
USB引腳定義
http://www.cnblogs.com/chinalantian/articles/2131361.html
USB A型接口
http://www.elecfans.com/yuanqijian/jiekou/2009041248833.html
USB B型接口
http://www.elecfans.com/yuanqijian/jiekou/2009041248834.html
USB 2.0 A型、B型、Mini和Micro接口定義及封裝
http://connector.eefocus.com/article/11-12/2285941323754675.html
USB3.0連接器引腳、接口定義及封裝尺寸
http://blog.csdn.net/junnes/article/details/8588856
USB2.0速度識別
http://blog.chinaunix.net/uid-103601-id-2961385.html
USB2.0 全速 FULL SPEED 和高速 HIGH SPEED 的區別
http://www.renhaibo.com/archives/166.html
USB高速設備識別
http://blog.sina.com.cn/s/blog_541cfd660101201r.html
EHCI和OHCI,UHCI的比較和區別
http://blog.csdn.net/pengwentao/article/details/7769185
幾種USB控制器類型:OHCI,UHCI,EHCI,xHCI
http://smilejay.com/2012/10/usb_controller_xhci/
USB OTG學習筆記
http://blog.csdn.net/ccwwff/article/details/6334789
USB OTG的工作原理 http://www.xuebuyuan.com/742429.html
USB信號簡介
http://blog.csdn.net/wjjontheway/article/details/8037147
USB OTG http://www.xuebuyuan.com/1948386.html
(以上整理來源互聯網)