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Basics

Created by Philips Semiconductor in 1982
No licence needed since 2006.
Bi directional communication - Half Duplex
VDD - Power line
SDA - Data line
SCL - Clock line
GND - Ground
i23C Bus
I2C Mode
Speed
Standard Mode
100 kbps
Fast Mode
400 kbps
Fast Mode Plus
1 Mbps
High Speed Mode
3.4 Mbps
Ultra-Fast Mode
5 Mbps