Gregory's Server@bcoffy i lost at c-to-c charging and pull down resistors, could i request an explanation please?
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2 comments
@genevieve @bcoffy A USB-C device which wants to receive power needs a resistor of a specific value between each of the two CC pins and ground, and the charger will only provide power when it sees one of these resistors. If a device cheats and uses a single resistor for both pins, it will work with basic cables but will fail with more capable cables (which use both pins). This famously happened with the initial revision of the RaspberryPi 4 (they fixed it in later revisions). |
@genevieve @bcoffy USB spec requires devices that want power to have 5.1kΩ resistors between the CC line and ground, and if a charger doesn't detect them it needs to refuse power delivery