![Álvaro Prieto on Twitter: "USB-C cables only pass through CC1. In order to use DAM, we need to have a USB-C plug (or custom cable) to connect both CC1 and CC2. If Álvaro Prieto on Twitter: "USB-C cables only pass through CC1. In order to use DAM, we need to have a USB-C plug (or custom cable) to connect both CC1 and CC2. If](https://pbs.twimg.com/media/FMJSLmHVQAI5z9C.png)
Álvaro Prieto on Twitter: "USB-C cables only pass through CC1. In order to use DAM, we need to have a USB-C plug (or custom cable) to connect both CC1 and CC2. If
Why do USB-PD Traces sometimes show volage on CC1 AND CC2, and other times show voltage on only CC1 OR CC2?
![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)
usb c - Can USB Type-C 2.0 upstream (device) connect its CC pins and share a pull-down? - Electrical Engineering Stack Exchange
![Usb Type-c Conversion Board 2.54mm Cc1 Cc2 5.1k Pull-down Resistor Connection - Integrated Circuits - AliExpress Usb Type-c Conversion Board 2.54mm Cc1 Cc2 5.1k Pull-down Resistor Connection - Integrated Circuits - AliExpress](https://ae01.alicdn.com/kf/Sc487c290be0044498b9998077d658e0bs/USB-TYPE-C-conversion-board-2-54MM-CC1-CC2-5-1K-pull-down-resistor-connection.jpg_Q90.jpg_.webp)