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USB Basics
USB is the most successful personal-computer interface ever. PCs, tablets, phones, and other devices have USB ports that can connect to everything from keyboards, mice, and game controllers to cameras, printers, drives, audio and video devices, and more. USB is versatile, reliable, fast, power-conserving, inexpensive, and supported by operating systems for computers large and small.
With continued improvements and enhancements such as SuperSpeed Plus and more flexible power delivery, USB is likely to continue to dominate as the interface of choice for an ever-expanding range of devices.
This chapter introduces USB, including its advantages and limits, some history about the interface and recent enhancements to it, and a look at what's involved in design- ing and programming a device with a USB interface.