Why do USB-PD Traces sometimes show volage on CC1 AND CC2, and other times show voltage on only CC1 OR CC2?
![Share about Firmware-Hardware and the latest USB Type-C PD technology. : USB Type-C Configuration Channel (CC) pin function (English version) Share about Firmware-Hardware and the latest USB Type-C PD technology. : USB Type-C Configuration Channel (CC) pin function (English version)](http://3.bp.blogspot.com/-pkTN-WQPgHM/U_K51jW9eYI/AAAAAAAAAiE/mOtJqWHqRA0/s1600/Physical_layer_CC.jpg)
Share about Firmware-Hardware and the latest USB Type-C PD technology. : USB Type-C Configuration Channel (CC) pin function (English version)
![usb c - Can USB Type-C 2.0 upstream (device) connect its CC pins and share a pull-down? - Electrical Engineering Stack Exchange usb c - Can USB Type-C 2.0 upstream (device) connect its CC pins and share a pull-down? - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/Hb6M5.png)