this post was submitted on 24 Nov 2024
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All the other brands went along (slrpnk.net)
submitted 4 weeks ago by [email protected] to c/[email protected]
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[–] [email protected] 1 points 4 weeks ago (1 children)

You can even get PD capable USB-C cables that don’t transmit data at all.

I don't think this is right. The PD standard requires the negotiation of which side is the source and which is the sink, and the voltage/amperage, over those data links. So it has to at least support the bare minimum data transmission in order for PD to work.

[–] [email protected] 2 points 4 weeks ago* (last edited 4 weeks ago) (1 children)

Technically, yes, data must transmit to negotiate, but it doesn’t require high throughput. So you’ll get USB 2.0 transfer speeds (480 Mb/s) with most “charging only” USB-C cables. That’s only really useful for a keyboard or mouse these days.

[–] [email protected] 2 points 4 weeks ago

This limitation comes up sometimes when people try to build out a zero-trust cable where they can get a charge but not necessarily transfer data to or from an untrusted device on the other side.