I²C - Wikipedia
https://en.wikipedia.org/wiki/I%C2%B2C
I C (Inter-Integrated Circuit, eye-squared-C), alternatively known as I2C or IIC, is a synchronous, multi-controller/multi-target (controller/target), packet switched, single-ended, serial communication bus invented in 1982 by Philips Semiconductors. It is widely used for attaching lower-speed peripheral ICs to processors and microcontrollers in short-distance, intra-board communication. Designed: 1982; 40 years ago
Designed: 1982; 40 years ago
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