pinout.vvzero.com/src/en/pin/pin-3.md

SDA (I2C1 Data) is one of the i2c pins on the Pi, [learn more about i2c](/pinout/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.
Content tweaks for #375 2020-08-26 03:08:38 +08:00			`SDA (I2C1 Data) is one of the i2c pins on the Pi, [learn more about i2c](/pinout/i2c).`
Added more pin content 2015-03-25 08:29:41 +08:00
Content tweaks for #375 2020-08-26 03:08:38 +08:00			`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.`