usb 1.1 spec.详细完整的usb规范

点读笔芯片资料，集成mp3解码、隐形二维码识别，丰富的接口包括：USB、NANDFLASH、T卡、GPIO、12BIT ADC等-Point reading pen chip data integrated mp3 decoder, invisible two-dimensional code recognition, rich interfaces including: USB, NANDFLASH, T card, GPIO, 12BIT ADC, etc.

Samsung s new ARM cpu datasheet. S5PC100 Spec. - CPU ARM Cortex-A8 667-833Mhz - 32KB L1, 256KB L2 Cache - Video 720p (1280x720 Play. h.264 divx, mp4...) - nand, sd/mmc, usb booting - Windows CE 6.0, Linux (*Android) support - support 1

EHCI（Enhanced Host Controller Interface）增强型主机控制器接口规范描述了一个通用串行总线（USB）2.0版的主机控制器的寄存器级接口。该规范包括系统软件和主机控制器硬件之间的硬件/软件接口的描述。本规范的目的是为硬件组件设计，系统集成商和设备驱动程序（软件）开发。-usb ehci1.0 spec