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Understanding and using the I2C bus

Posted: 01 Nov 1997     Print Version  Bookmark and Share

Keywords:I2C bus  Inter-IC Control  peripheral chips 

Understanding and using the I2C bus The Inter-IC Control (I 2 C) bus is a de facto standard developed by Philips Semiconductors over a decade ago. Originally, its purpose was to connect a CPU to peripheral chips in a television, but its scope has since broadened to cover a whole range of intelligent devices. The reason for its acceptance is clear: board sizes are shrinking, thereby decreasing IC package sizes, while functionality of these programmable devices continues to increase. While this article deals with the original I 2 C bus interface, the applicability of other interfaces such as ACCESS.bus, SMBus, and a host of other manufacturer serial protocol interfaces (SPIs) is evident. I'm focusing on this subject because while many of us routinely use these serial interfaces, only a limited number of tutorials describe the mechanics of implementing them. Dealing with these interfaces consumes much of my time; in fact, one of my biggest problems is simply monitoring the interface. View the PDF document for more information.

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