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What does I²C stand for? 

What does I²C mean? This page is about the various possible meanings of the acronym, abbreviation, shorthand or slang term: I²C.

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I²C

Inter-Integrated Circuit

Computing

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What does I²C mean?

I²C
I²C is a multimaster serial single-ended computer bus invented by Philips used for attaching low-speed peripherals to a motherboard, embedded system, cellphone, or other electronic device. Not to be confused with the term Two Wire Interface which only describes a compatible hardware interface. Since the mid-1990s, several competitors brought I²C products on the market, which are fully compatible with the NXP I²C-system. Since October 10, 2006, no licensing fees are required to implement the I²C protocol. However, fees are still required to obtain I²C slave addresses allocated by NXP. SMBus, defined by Intel in 1995, is a subset of I²C that defines the protocols more strictly. One purpose of SMBus is to promote robustness and interoperability. Accordingly, modern I²C systems incorporate policies and rules from SMBus, sometimes supporting both I²C and SMBus with minimal reconfiguration required.

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