USB 3.2 Specification Published and Announced

by Hilbert Hagedoorn on: 09/27/2017 07:11 PM | source: | 28 comment(s)

A while ago there was already word out on the street that the USB Focus group would be announcing a new draft for upcoming USB 3.2, that has now been finalized and published. To keep things really simple, we're doubling thing up once again.

Where USB 3.0 aka 3.1 Gen1 was capable of 5 Gbps connectivity, USB 3.1 Gen2 did 10 Gbps. USB 3.2 will double that up-towards 20 Gbps. Divide it by 8 bits and that would be 2500 MB/sec from which you need to deduct encoding and errors. There is a distinction though as it is based up-on two-lane operation as tweakers.net spotted today.

Key characteristics of the USB 3.2 solution include:

Two-lane operation using existing USB Type-C cables
Continued use of existing SuperSpeed USB physical layer data rates and encoding techniques
Minor update to hub specification to address increased performance and assure seamless transitions between single and two-lane operation

So basically using two 10 Gbit/s lanes you get towards a throughput of 20 Gbps. Obviously you will need a host and client connection that is compatible with the new standard. Current USB type C cabled would be compatible if they have been certified for 10 Gbps SuperSpeed USB. If you like to do some reading, there is a 548 page document available on the new 3.2 Spec, download here.


USB version	Speed	Encoding	Connectors
USB 2.0 (incl usb 1.0 and 1.1)	up to 480 Mbps	8 / 10bit	Type a, b (mini, micro), c
USB 3.1 Gen 1 (SuperSpeed Usb)	up to 5 Gbps	8 / 10bit	Type a, b (mini, micro), c
USB 3.1 Gen 2 (SuperSpeed usb Gbps)	up to 10 Gbps	128 / 130bit	Type a, b (micro), c
USB 3.2 (SuperSpeed usb 20 Gbps)	up to 2 lanes 5 Gbps up to 2 lanes 10 Gbps	128 / 130bit	Type a, b (micro), c

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Kaarme
Senior Member

Posts: 3405
Joined: 2013-03-10

#5476335 Posted on: 09/27/2017 08:38 PM

USB3 was much needed as USB2 was too slow for external HDs and was also holding back flash drives. After that I didn't really care anymore, but I have to say the Type-C connector is quite nice for a phone as there's no need to check the orientation.

DLD
Senior Member

Posts: 887
Joined: 2002-09-14

#5476340 Posted on: 09/27/2017 08:49 PM

But, of course - we are saved from extinction now that we do not have to

worry about

"orientation". Because, lo and behold, disorientation of such magnitude could have lead us to unimaginable disasters, compared to (but not limited to) Irma, El Niño and alike...

Ouch! Something is missing here, in the new specs: whatever happened to RGB decoration?! I want every pin to be equipped with LED of a different color!

Emille
Senior Member

Posts: 785
Joined: 2014-09-22

#5476341 Posted on: 09/27/2017 08:55 PM

But, of course - we are saved from extinction now that we do not have to

worry about

"orientation". Because, lo and behold, disorientation of such magnitude could have lead us to unimaginable disasters, compared to (but not limited to) Irma, El Niño and alike...

Ouch! Something is missing here, in the new specs: whatever happened to RGB decoration?! I want every pin to be equipped with LED of a different color!

I didn't even know sarcasm of this magnitude was even possible.

Agent-A01
Senior Member

Posts: 11625
Joined: 2010-12-27

#5476343 Posted on: 09/27/2017 08:59 PM

Lots of typo errors in this article.
Thought you might want to know.

SilAntoine
Junior Member

Posts: 6
Joined: 2014-12-27

#5476362 Posted on: 09/27/2017 09:36 PM

Meanwhile PS/2 ports are still alive and well!

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