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USB 3.2, released in September 2017, [35] preserves existing USB 3.1 SuperSpeed and SuperSpeedPlus architectures and protocols and their respective operation modes, but introduces two additional SuperSpeedPlus operation modes (USB 3.2 Gen 1×2 and USB 3.2 Gen 2×2) with the new USB-C Fabric with signaling rates of 10 and 20 Gbit/s (raw data ...
SuperSpeed+ (SS+) uses increased signaling rate (Gen 2×1 mode) and/or the additional lane in the Type-C connector (Gen 1×2 and Gen 2×2 mode). A USB connection is always between a host or hub at the A connector end, and a device or hub's upstream port at the other end.
Under the USB 3.2 specification, released 22 September 2017, [11] existing SuperSpeed certified USB-C 3.1 Gen 1 cables will be able to operate at 10 Gbit/s (up from 5 Gbit/s), and SuperSpeed+ certified USB-C 3.1 Gen 2 cables will be able to operate at 20 Gbit/s (up from 10 Gbit/s). The increase in bandwidth is a result of multi-lane operation ...
The xHCI reduces the need for periodic device polling by allowing a USB 3.0 or later device to notify the host controller when it has data available to read, and moves the management of polling USB 2.0 and 1.1 devices that use interrupt transactions from the CPU-driven USB driver to the USB host controller.
The USB Power Delivery specification revision 2.0 (USB PD Rev. 2.0) has been released as part of the USB 3.1 suite. [ 57 ] [ 64 ] [ 65 ] It covers the USB-C cable and connector with a separate configuration channel, which now hosts a DC coupled low-frequency BMC -coded data channel that reduces the possibilities for RF interference . [ 66 ]
USB 3.2 SuperSpeed+ (aka USB 3.2 Gen 2×2 USB4 Gen 2×2, USB4 Gen 3×1) [45] 20 Gbit/s: 2.424 GB/s: 2017 Thunderbolt 2: 20 Gbit/s: 2.5 GB/s: 2013 FPGA Mezzanine Card Plus (FMC+) [46] 28 Gbit/s: 3.5 GB/s: 2019 External PCI Express 2.0 ×8: 32 Gbit/s: 4 GB/s: USB4 Gen 3×2 [47] 40 Gbit/s: 4.8 GB/s: 2019 Thunderbolt 3 two links: 40 Gbit/s: 5 GB/s ...
Cable length should be 2.0 m or less for Gen 1 and 1.0 m or less for Gen 2. Thunderbolt Type-C to Type-C active cable Thunderbolt 3 (40 Gbit/s) Alternate Mode with cables longer than 0.8 m requires active Type-C cables that are certified and electronically marked for high-speed Thunderbolt 3 transmission, similarly to high-power 5 A cables.
USB 3.1, released in July 2013, is the successor standard that replaces the USB 3.0 standard. USB 3.1 preserves the existing SuperSpeed transfer rate, giving it the new label USB 3.1 Gen 1, [7] [8] while defining a new SuperSpeed+ transfer mode, called USB 3.1 Gen 2 [9] which can transfer data at up to 10 Gbit/s over the existing USB-type-A and ...