GPIO 2 (I2C Data)
|I2C1 SDA||SMI SA3||DPI VSYNC||AVEOUT VSYNC||AVEIN VSYNC|
- Physical/Board pin 3
- GPIO/BCM pin 2
- Wiring Pi pin 8
- GPIO/BCM pin 0 on Rev 1 ( very early ) Pi
SDA (I2C1 Data) is one of the i2c pins on the Pi, learn more about i2c.
SDA includes a fixed, 1.8 kΩ pull-up to 3.3v, which means this pin is not suitable for use as a general purpose IO where no pull-up resistor is desired.