In March last year, the USB-IF organization officially announced the USB4 interface standard, the speed reached 40Gbps, and integrated 100W charging, video signal transmission and so on. However, the launch of USB4 was handed over to the Tiger Lake 11 generation Core mobile platform, which will not be available until the second half of this year. Recently, Intel used to support three master exposures for USB 4, the device ID is 0x9A1B, 0x9A1D and 0x9A13, and the support documentation mentions down compatibility for USB 3.2, while supporting USB Power Delivery 3.0.
The so-called USB 3.2 is actually defined by the latest definition, including USB 3.2 Gen2x2, USB 3.2 Gen2, USB 3.2 Gen1 three generations, namely the earlier USB 3.2, USB 3.1 and USB 3.0.
As for USB4, Intel also divides the USB 4 20 and USB 40, with interface bandwidths of 20Gbps and 40Gbps respectively.
In addition, an important change in the emergence of USB 4 is that type-c, which is positive and negative blind, has replaced size over Type-A.
Details of AMD’s support for USB4 are unclear, after independent sources revealed it would not follow up until 2022.