The TI TPS25730 USB-C PD device is at I2C address 0x20 and provides power over a USB-C cable to the SCU35 board. This I2C interface can be used to provide general status information about the TI TPS25730 USB-C PD device as well as the ability to control the device behavior. More information about using the TPS25730 device can be found at the TI website.