What is USB 3.2?

Dec 02, 2020

   Before understanding what is USB 3.2, we need to sort out the development history of USB


   Actually, USB 3.2 is a re-division of the various specifications in USB 3.0 and USB 3.1 by the USB Implementers Forum (USB-IF) so that consumers can quickly identify them.

   USB 3.2 Gen1 (SuperSpeed USB) = USB 3.1 Gen1 = USB 3.0; USB 3.2 Gen2 (SuperSpeed USB 10Gbps) = USB3.1 Gen2; USB 3.2 Gen 2 (SuperSpeed USB 20Gbps) = USB 3.1 Gen 2 2

   The USB interface is divided into USB 1.0, USB 1.1, USB 2.0, USB 3.0. The USB 2.0 interface and USB 3.0 interface that we often say are classified according to the USB specification. In 2013, USB 3.0 was renamed USB 3.1 Gen 1, and USB 3.1 Gen 2 with a bandwidth of 10Gbps was released. The two are collectively referred to as USB 3.1. In 2017, USB 3.1 Gen 1 and USB 3.1 Gen 2 were renamed to USB 3.2 Gen 1 and USB 3.2 Gen 2. At the same time, the USB 3.2 Gen 1x2 with a bandwidth of 10Gbps and the USB 3.2 Gen 2x2 with a bandwidth of 20Gbps were added. These 4 are collectively referred to as USB 3.2

  So far we have entered the USB 3.2 era, and the name of USB 3.0 has become history. In short, USB 2.0 is still retained, and USB 3.0 has now been renamed USB 3.2 Gen 1 by the USB-IF Association, and the names USB 3.2 Gen 1x2 and USB 3.2 Gen 2x2 have also been added. Among them, USB 3.2 Gen 1x2 and USB 3.2 Gen 2x2 respectively represent the dual-channel mode of USB 3.2 Gen 1 and USB 3.2 Gen 2, while USB 3.2 Gen 1 and USB 3.2 Gen 2 are single-channel modes

   The previous USB naming rules are very simple: USB 1.1 (12Mbps), USB 2.0 (480Mbps), USB 3.0 (5Gbps)
   Until the emergence of USB 3.1, the USB-IF Association decided to confuse everyone. The biggest new feature of USB 3.1 is to double the data rate to 10Gb/s. A reasonable approach is to mark the existing 5Gb/s device as "USB 3.0" and the new 10Gb/s device as "USB 3.1". But this is not what the USB-IF Association does. For incomprehensible reasons, the USB-IF Association decided to name USB 3.0: 5Gb/s as "USB 3.1 Gen 1" and 10Gb/s as "USB 3.1 Gen 2" (Super Speed USB 10Gbps)

   Now, the USB-IF Association is making things more confused. First of all, the old USB 3.1 device is now magically changed to USB 3.2---at the exact same speed. And the new 20Gbps got a stupid new name:

   USB 3.1 Gen 1 becomes USB 3.2 Gen 1, USB 3.1 Gen 2 becomes USB 3.2 Gen 2, and the name of new 20 Gbps is...USB 3.2 Gen 2×2

   In this case, if a product claims that they support USB 3.2, consumers will not know whether they are getting 5gbps, 10gbps or 20Gbps without further information
   Therefore, we are still using the familiar names: USB 2.0, USB 3.0, USB 3.1, as for USB 3.2, it seems that few people use this name. If you have any doubts, contact us !