i2c memo

This is a tiny memo on "how does i2c work"

There will be no complex explanations, just basic stuff.
Most of this information can be found in the web.

i²c

History and origin

Basically we don't care, but for sake of clarity I have to mention, that i²c really is IIC which means Inter-Integrated circuit. Why do we care? Because this brings in length and line quality limitations. Sometimes we can extend this limits, but most of the time it's better to obey official reference documentation.