Logic 1 means the pin is tied "high" so that the voltage on the pin is a constant DC level that exceeds the VIH spec of 2.1V.
SDA means the pin is tied to the SDA signal (I2C data line).
Logic 1 means the pin is tied "high" so that the voltage on the pin is a constant DC level that exceeds the VIH spec of 2.1V.
SDA means the pin is tied to the SDA signal (I2C data line).