75XX I2C
From embeddedTS Manuals
The I2C_SCL and I2C_SDA pins bring out the I2C bus from the CNS2132 CPU. We do have an example for connecting to the I2C bus that uses the temperature sensor used on some of this series. You can find the C example here.
Please refer to the CNS2132 user's guide, page 55, 144, and 312 for more information on this I2C bus.