At the Taipei Computer Exhibition,Xiangshuo(ASMedia) announced that it had taken the lead in completingUSB 3.22x2 main controller and public demonstration.
XiangshuoThe new master control scheme of is composed of two parts. One is the xHCI master control chip“ASM3242”The second is PCIe NVMe SSD bridge chip“ASM2364”, using PCIe 3.0 x4 interface, theoretical bandwidth 4GB/s, can fully meetUSB 3.220Gbps (2.5GB/s) and supports NVMe.
The scheme isXiangshuoFully independent research and development, from PHY to control circuit.
XiangshuoIt was revealed that this new master controller will be delivered to customers in batch in August, and the first model is expected to supportUSB 3.2This fall, about two years after the standard was released.
USB 3.2The standard was released in September 2017. It is downward compatible with USB 3.1/3.0/2.0 and retains the original physical layer data rate and encoding mechanism, but uses USBType-CFour additional lines are reserved in the interface to double the speed.
It also means that,USB 3.2There will be onlyType-CAn interface that no longer has Type-A.
However, according to the latest regulations of USB-IF, USB 3.2, 3.1 and 3.0 are not "standard", but should be called USB 3.2 Gen 1USB 3.2 Gen 2、USB 3.2 Gen 2x2……
In addition, although the USB 4.0 standard has been announced and integrated with Intel Thunderbolt 3 technology, the speed has doubled again to 40Gbps, it is still far away. At present, it is only 0.96 version of the draft specification. If all goes well, it is expected to be completed by the end of this summer, and then it will take about two years to design and develop related products. Therefore, it will take the second half of 2021 to see USB 4.0 devices as soon as possible.