Why do USB-PD Traces sometimes show volage on CC1 AND CC2, and other times show voltage on only CC1 OR CC2?
![How to design a proper USB-C™ power sink (hint, not the way Raspberry Pi 4 did it) | by Benson Leung | Medium How to design a proper USB-C™ power sink (hint, not the way Raspberry Pi 4 did it) | by Benson Leung | Medium](https://www.scorpia.co.uk/wp-content/uploads/2019/06/image-300x292.png)
How to design a proper USB-C™ power sink (hint, not the way Raspberry Pi 4 did it) | by Benson Leung | Medium
![Mike on Twitter: "USB-C question: I've seen others pull down CC1 & CC2 through a 5.1K resistor many times but the STM32 BlackPill appears to connect them to each other.? https://t.co/p3RjMr1Bvm" / Mike on Twitter: "USB-C question: I've seen others pull down CC1 & CC2 through a 5.1K resistor many times but the STM32 BlackPill appears to connect them to each other.? https://t.co/p3RjMr1Bvm" /](https://pbs.twimg.com/media/E9zwYWaXIAkEuMf.jpg)
Mike on Twitter: "USB-C question: I've seen others pull down CC1 & CC2 through a 5.1K resistor many times but the STM32 BlackPill appears to connect them to each other.? https://t.co/p3RjMr1Bvm" /
![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/-3YFIjRmidYs/VBjjenmDkVI/AAAAAAAAAjQ/MI5j9l-3Ih4/s1600/Type_c_accessory_detection.jpg)
Share about Firmware-Hardware and the latest USB Type-C PD technology. : USB Type-C Configuration Channel (CC) pin function (English version)
![Cómo afectan los diferentes tipos de cables USB tipo C a la funcionalidad de la estación de acoplamiento? Conocimiento - Xiamen Kabasi Electric Co., Ltd Cómo afectan los diferentes tipos de cables USB tipo C a la funcionalidad de la estación de acoplamiento? Conocimiento - Xiamen Kabasi Electric Co., Ltd](http://m.kbs-connector.com/Content/uploads/2021625326/202105221459189a56e6fcdd834f4fb5c5801af2d23ea6.png)
Cómo afectan los diferentes tipos de cables USB tipo C a la funcionalidad de la estación de acoplamiento? Conocimiento - Xiamen Kabasi Electric Co., Ltd
![Simple way to use USB Type-C to get 5V at up to 3A (15W) - Support - Engineering and Component Solution Forum - TechForum │ Digi-Key Simple way to use USB Type-C to get 5V at up to 3A (15W) - Support - Engineering and Component Solution Forum - TechForum │ Digi-Key](https://global.discourse-cdn.com/digikey/original/2X/d/d113438788b55d74940d81de8889356949d9d8d4.jpeg)