SLVSD02D March 2015 – June 2019 TPS65982
The C_CC1 and C_CC2 pins are used to deliver power to active circuitry inside a connected cable and output USB-PD data to the cable and connected device. Figure 20 shows the C_CC1, and C_CC2 outputs to the port. Only one of these pins will be used to deliver power at a time depending on the cable orientation. The other pin will be used to transmit USB-PD data through the cable to a connected device.
Figure 37 shows a high-level flow of connecting these pins based on the cable orientation. See the Cable Plug and Orientation Detection section for more detailed information on plug and orientation detection.
Figure 38 and Figure 39 show the two paths from PP_CABLE to the C_CCn pins. When one C_CCn pin is powered from PP_CABLE, the other is connected to the USB-PD BMC modem. The red line shows the power path and the green line shows the data path.