The USB standard has been very well-received in the IT world. That’s why the USB IF organization publishes a new version of the standard from time to time, which offers faster data transmission. The USB 3.2 standard was published in September last year, but only now did we see the first demonstration of its capabilities. Synopsys implemented a new solution on the FPGA platform and connected it to a computer with Windows 10.
Demonstration prepared by Synopsys reveals interesting about the new standard. USB 3.2 does not require new drivers or cables for proper operation. During the test, a standard USB 3.1 cable was used, which is intended for operation with currently offered devices. The engineers also did not have to modify the drivers installed on the Windows computer in any way. Likewise, no firmware modification was required on the platform that pretended to be USB stick. Best of all, however, is that USB 3.2 devices will work with cables that comply with the USB 3.1 standard, which is twice as slow. However, this is not the slightest problem, because the newer standard is faster due to multi-band data transmission.
During the first USB 3.2 test, the result was 1.6 GB/s (14.17 Gbps)
The test was carried out using the HD Speed program, which measured the speed of reading data from the mounted USB memory. The result at the level of 1.6 GB / s is very good, because it exceeds the theoretical limit of the USB 3.1 standard. However, we must remember that the conversion between GB/s and Gbps does not consist in dividing the result by 8. The first measure determines the amount of data read in a second. Therefore, the prefix Giga means the number 10243. The second measure determines the number of bits sent by the interface in a second. In this case, the prefix Giga means the number 1000³. At the same time, we must include here some overhead correction data, which in the case of USB 3.1 and USB 3.2 is 3.1%.
Synopsys has not yet reached the speed announced by the USB IF organization. The USB 3.2 standard allows for the transfer of data from storage media with a speed exceeding 2 GB/s. There is a lot of work ahead of engineers before they refine their solution and miniaturize it. Implementation on the FPGA platform proves that the algorithms developed by Synopsys work. However, the most important are the results that will be obtained on the target hardware platform.