SLLA565 September 2021 TUSB1044
The PD controller controls the TUSB1044 FLIP depending on the CC communication to support USB Type-C Normal and FLIP orientation. The CTL[1:0] is set by the PD controller depending on the PD communication to operate in USB and DP alternate mode. The combinations of CTL0 and CTL1 support the following configurations: USB3.2 Gen2x1 only, two-lane DP + two-lane USB3.2 Gen2x1, or four-lane DP.
In the I2C mode, FLIP and CTL0 are designed to work as SCL and SDA respectively and must be connected to the I2C master of the PD controller. CTL1 can be left as NC. FLIP and CTL[1:0] function are controlled though I2C register 0x0A.