Re:All About USB-C: Illegal Adapters
by yjftsjthsd-h on Tuesday December 27, 2022 @02:50PM
(#34152934)
Always, or did it just break the ability to flip it upside-down?
[ Parent
| on HN ]
If the 5.1k pull-down resistors are missing on the device side, it will not charge from a USB-C wall brick, laptop, etc. in either orientation, but it will work fine when charging from a USB-A outlet with a USB-A to USB-C cable. This is because USB-C outlets are not permitted to provide any power until they detect the presence of a "legacy" device that just wants 5v (as signaled by the pull-down resistors on the device).