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* Superspeed is the bandwidth tiers - 5, 20, 40, and 80 soon. High speed and Basic speed are for older and/or simpler devices (defined by USB 2.0). * They do s
by dwaite 4y ago
* Superspeed is the bandwidth tiers - 5, 20, 40, and 80 soon. High speed and Basic speed are for older and/or simpler devices (defined by USB 2.0).
* They do specify power tiers, 15W is the minimum for chargers, 30W I believe is the minimum for power delivery cables, with cables being additionally certified (and marked) for 60W, 120w and 240W.
* A certified cable with USB-C ports on both ends should be a USB cable, full-stop. Negotiation of alt modes is up to the devices on both ends.
The problem is that there are a lot of vendors that use garbage terms like USB 3.2 2x2, which were never meant for the market at all. I suspect this is usually a consequence of those products not actually being certified, and thus avoiding using the official marks.
IMHO, that there was anything publicly talking about "USB 3.2 2x2" is a side effect of the USB-IF not having the teeth to enforce use of the "USB" mark. Vendors would start using the right terms and running basic conformance if, say, they found they were no longer able to get their products imported. But the Implementers Forum is made up of the same vendors who are shipping broken devices, cheap charging cables, and motherboards with spec-invalid ports.
When many people talk about USB 3.2, people assume there is some sort of semantic versioning of the port or cables itself. Thats not how specs work - everything which was USB 3.0 compliant is USB 3.2 compliant. If you want to mandate new things or break old ones, you create a new version like USB4.
Many people have the same problem with HDMI 2.1a - there is no device certified with HDMI 2.0 that is incompatible with HDMI 2.1a. Thus, advertising 2.1a support means _nothing_ compared to advertising HDMI 2 support in general. It was a marketing failure that the HDMI licensing organization allowed vendors to use version numbers to imply _anything_, vs advertising that the devices you are connecting support features like 8K/60 or VRR.