UTMI全称为 USB2.0 Transceiver Macrocell Interface，此协议是针对USB2.0的信号特点进行定义的，分为8位或16位数据接口。目的是为了减少开发商的工作量，缩短产品的设计周期，降低风险。此接口模块主要是处理物理底层的USB协议及信号，可与SIE整合设计成一专用ASIC芯片，也可独立作为PHY的收发器芯片，下以8位接口为例介绍PHY的工作原理及设计特点。 -UTMI called USB2.0 Transceiver Macrocell Interfac

USBHostSlave is a USB 1.1 host and Device IP core. – Supports full speed (12Mbps) and low speed (1.5Mbps) operation. – USB Device has four endpoints, each with their own independent FIFO. – Supports the four types of USB data transfer control,

USB接口开发的源代码,包括软件和硬件，学习USB非常好用的资料-USB interface, the development of source code, including software and hardware, learning is very easy to use USB data

USB1.1标准接口的IP核的实现和其设计实现的源码范例VHDL-USB1.1 standard interface IP core implementations and examples of their design and implementation of the VHDL source code