The master pulls the SDA line low while SCL remains high.
Uses a Serial Data Line ( SDA ) and a Serial Clock Line ( SCL ). I2C Overview
Multiple masters can control the same slave, and multiple slaves can reside on the same bus. The master pulls the SDA line low while SCL remains high
The master sends the 7-bit unique address of the target slave, followed by a R/W bit (0 for write, 1 for read). The master sends the 7-bit unique address of
I2C (Inter-Integrated Circuit), often pronounced "eye-squared-see" or "eye-two-see," is a popular, synchronous, multi-master/multi-slave communication protocol invented in 1982 by Philips Semiconductors (now NXP). It is used for short-distance, intra-board communication between a processor and low-speed peripherals such as sensors, LCDs, and memory chips. Its hallmark is using only two wires for communication, making it highly efficient for managing multiple devices on a single bus.
SDA and SCL are connected to a voltage source via pull-up resistors, allowing devices to pull the lines low without creating short circuits.