Lukas
You may have heard of eUSB, the low-voltage cousin to the venerable USB 2.0 from 25 years ago. It's used on SoCs made on small process nodes that can't support standard USB 2.0 voltage levels.
Turns out, it recently got an upgrade called eUSB2V2 (yes, really). It supports asymmetric operation (which is a first for USB) at up to 4.8Gbit/s and is aimed at connecting high-resolution webcams in laptops.
✧✦Catherine✦✧
@malwareminigun @aris this is true but TTs did not work for 1-to-2 migration and 2-to-3 migration was even worse
Billy O'Neal
@aris I'm sorry but WHAT.
I know double-Es say USB is cursed but that's a new one
Billy O'Neal
@fleaz I think 'USB 4 2.0' is worse than that. At least the 'x2' part actually describes the operation of the interface and conveys that devices not supporting that protocol would still operate at 10Gbps (assuming USB 3 Gen 2 is understood as 10Gbps).
In fact this protocol is the one big wrench in the gears of my 'just name then by bandwidth' strategy as my hypothetical 'USB 20Gbps' actually operate in 'USB 10Gbps' mode for most 'USB 40Gbps' implementations like Thunderbolt 3/4 controllers.
Aris Adamantiadis :verified:💲Paid
@malwareminigun @fleaz I'll never forgive them of deciding to make USB3 backward compatible with USB2 by multiplexing USB2 electrically instead of tunneling USB2 through USB3. It makes so many USB2 devices unstable when behind a hub.
Billy O'Neal
@karotte @whitequark I can’t believe they still can’t get the names right even when it’s not about the consumer “make the names confusing so we can advertise the same garbage as new” scam
I will keep protesting by saying USB <bitrate> until they choose something more sane.
No: USB 3 Gen 1 Yes: USB 5Gbps
No: USB 3 Gen 2 Yes: USB 10Gbps
No: USB 4 2.0 Yes: USB 80Gbps
And so on
fleaz
@malwareminigun @karotte @whitequark You forgot the worst of them all "USB 3.2 Gen 2x2" 🤡
✧✦Catherine✦✧
@malwareminigun @aris Transaction Translators
Billy O'Neal
@whitequark @aris TTs?
Coelacanthus 😶🌫️ 🏳️⚧️
@malwareminigun @karotte @whitequark It's not enough, I think. Both USB 3.2 gen2x1 and 3.2 gen1x2 are 10Gbps, but they are not the same thing. Plug USB 3.2 gen2x1 into gen1x2, you will got the most common speed gen1x1 which is 5Gbps, vice versa. The same thing is also happened on USB4 v1 and USB 3.2 gen2x2, both are 20Gbps (ignore optional USB4 v1 40Gbps). But USB4 use a different PHY layer, so it need a tunnel to be compatible with USB 3. Unfortunately, only 10Gbps tunnel is required, 20Gbps tunnel is optional, so if you plug a USB 3.2 gen2x2 into USB 4, you may can only get 10Gbps instead of 20Gbps.
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