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Handbook of Serial Communications Interfaces by Louis E. Frenzel

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Chapter Two

Serial I/O Primer

A Short Course in Data Communications and Networking

If you are reading this book, then you probably already know the basics of serial I/O. However, if you want a quick review, this chapter will refresh your memory on the key concepts. The chapter covers the principles of serial data transfer common to all the interfaces to be discussed later. These basics include serial versus parallel transfer, balanced versus unbalanced connections, physical media types, data rate, line coding, protocols, serdes, and other common characteristics. The chapter is not intended to cover all aspects of serial I/O, but it will provide a background for understanding and selecting the interfaces covered. Only Layers 1 and 2 of the Open ...

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