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Twiddle bits

Posted: 03 Dec 2001     Print Version  Bookmark and Share

Keywords:I/O pins  board  FPGA  bit manipulation 

Twiddle bits Embedded systems are not often blessed with an abundance of peripheral devices. In some cases-particularly when first bringing up a new board-we may have nothing more than a few discrete bits with which to report what's going on inside the system, or to communicate our wishes to it. Fortunately, much can be done with a lone bit. In this article, I'll discuss the basics of general-purpose I/O pins, including programming considerations, and some simple circuitry for really putting them to work. View the PDF document for more information.

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