USB Operating Package - Med Associates Inc.
USB protocol | PPT
About the USB Protocol, Common USB Bus Errors, and How to Troubleshoot Them - Total Phase
USB high-speed SOF - xxxdk's blog
USB Transfer Types | Microchip Technology
SOF-Calibrated 48MHz USB Clock IP Core
An Introduction to USB Communication (Part 2) - Open4Tech
USB Transfer Types | Microchip Technology
USB Enumeration | Perytech
Canovatech - CT20101
USB 2.0 | EmbeddedInn
USB笔记】USB 2.0 帧开始包Start-of-Frame Packets_usb2.0 sof-CSDN博客
USB Full Low Speed Signal Quality
USB协议详解第20讲（USB包-帧首包SOF）_usb sof-CSDN博客
Hacking microcontroller firmware through a USB | Securelist
Universal Serial Bus - OSDev Wiki
TZ3-SOF-USB
USB 介面淺介- 大大通(繁體站)
How USB Works | Microchip Technology
USB Made Simple - Part 6
DE2-115 FAQ English version - Terasic Wiki
USB-101 | SOFNG | USB Connectors | JLCPCB
An Introduction to USB Communication (Part 2) - Open4Tech
USB Audio Simplified
USBD — Universal serial bus device
USB Transfer Types | Microchip Technology
USB协议详解第20讲（USB包-帧首包SOF）_usb sof-CSDN博客
USB Enumeration | Perytech
USB Component: USB Protocol
