USB 1.1 and USB 2.0 detailed description of the agreement, physical electrical characteristics, design rules and so on. very informative

Packet : 69491743usb1.1_2.0.rar filelist
USB协议\usb_1.1(en).pdf
USB协议\usb_2.0(en).pdf
USB协议\usb_OTG.pdf
USB协议\USB1.1中文\01 intro.doc
USB协议\USB1.1中文\02 术语和缩略词.doc
USB协议\USB1.1中文\05 USB数据流模型.doc
USB协议\USB1.1中文\07 USB电气特性(缩写).doc
USB协议\USB1.1中文\08 协议层.doc
USB协议\USB1.1中文\09 USB设备架构.doc
USB协议\USB1.1中文\10 usb主机硬件软件.doc
USB协议\USB1.1中文\11 集线器规范_1.doc
USB协议\USB1.1中文\usb9_one.doc
USB协议\USB1.1中文
USB协议

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