I2C - Signals
What signals are used in I2C interface?
I2C is very simple serial interface with only two wires.
- SDA (Serial DatA): Carries data signal
- SCL (Serial CLock): Carries clock signal
Both SDA and SCL are bi-directional lines, connected to a positive supply voltage via a current-source or pull-up resistor. When the bus is free, both lines are HIGH.