Serial Communication - learn.sparkfun.com
USB-IF Compliance Updates
![SOLVED] - USB data indicator on D+ D- bus from AVR | Forum for Electronics](https://lh6.googleusercontent.com/-B7r_aQHKm3E/UxlT75fx75I/AAAAAAAACZM/Kr2N9pXc5yc/s640/USB%2520connections.png "SOLVED] - USB data indicator on D+ D- bus from AVR | Forum for Electronics")
SOLVED] - USB data indicator on D+ D- bus from AVR | Forum for Electronics
USB hardware - Wikipedia
Measuring the Universal Serial Bus (USB)
Logic Voltage Levels – Wired && Coded;
signal eye voltage level too high USB 2.0 Upstream near end - Electrical Engineering Stack Exchange
USB-IF Compliance Updates
FAN3989 — USB/Charger Detection Device with Load Switch
USB-IF Compliance Updates
Guide to USB-C Pinout and Features - Technical Articles
USB Made Simple - Part 2
USB in a NutShell - Chapter 2 - Hardware
USB Dedicated Charging Port Controller and Power Switch. datasheet (Rev. A)
ARM: USB Low-Speed Device on NXP LPC1800/4300 USB0 Host
What is the exact voltage of a standard USB data signal in either data wire? I'd assume they are the same. I know that the power wires are 5 volts. - Quora
voltage - Why does USB have Vcc=5V and high=3.3V? - Electrical Engineering Stack Exchange
Agilent Technologies N5416A Automated USB 2 - ppt video online download
Switching in USB Consumer Applications | Analog Devices
Verify USB port's supply voltage before use - EDN
USB 101: An Introduction to Universal Serial Bus 2.0
