Termination Resistors (Rp, Rd, Ra) required for the USB Type-C (KA-03259)
A downstream-facing port (DFP), such as a host computer, exposes pull-up terminations, Rp, on its CC pins (CC1 and CC2). An upstream-facing port (UFP), such as a peripheral, exposes pull-down terminations, Rd, on its CC pins. The purpose of Rp and Rd terminations on CC pins is to identify the DFP-to-UFP connection and the CC pin that will be used for communication. To do this, the DFP monitors both CC pins for a voltage lower than its unterminated voltage. More https://community.infineon.com/t5/Knowledge-Base-Articles/Termination-Resistors-Required-for-the-USB... here.