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Nt1110 Usb 3.1

In: Computers and Technology

Submitted By raiderbrad
Words 367
Pages 2
The new USB 3.1 adds a 10 Gbps speed mode that uses a more efficient data encoding and will deliver more than twice the effective data of existing Super Speed USB over enhanced, fully backward compatible USB connectors and cables. The specification extends the existing Super Speed mechanical, electrical, protocol and hub definition while maintaining compatibility with existing USB 3.0 software stacks and device class protocols as well as with existing 5 Gbps hubs and devices and USB 2.0 products. In January 2013, the USB group had a press release revealing plans to update USB 3.0 to 10 Gbit/s, effectively putting it on par with Thunderbolt by mid-2013. The USB 3.1 specification was released introducing a faster transfer mode called "Super Speed USB 10 Gbps"; its logo features a Super speed (stylized as SUPERSPEED+) caption. The USB 3.1 standard increases the signaling rate to 10 Gbit/s, doubling that of USB 3.0, and reduces line encoding overhead to just 3% by changing the encoding scheme to 128b/132b. Though, some initial tests demonstrated usable transfer speeds of only 7.2 Gbit/s, suggesting a 30% overall overhead. The USB 3.1 standard is backward compatible with USB 3.0 and USB 2.0. Using three power profiles of those defined in the USB Power Delivery Specification, it lets devices with larger energy demands request higher currents and supply voltages from compliant hosts – up to 2 A at 5 V (for a power consumption of up to 10 W), and optionally up to 5 A at either 12 V (60 W) or 20 V (100 W). Initially, USB provided two speeds (12 Mbps and 1.5 Mbps). With rapid adoption and success of the USB standard and the increasing power of PCs and computing devices. USB 2.0 provided up to 480 Mbps of bandwidth while keeping software compatibility with earlier USB applications. With ever increasing bandwidth requirements, in 2008 the USB 3.0 specification (providing 5 Gbps bi-directional bandwidth) was released. USB 3.1 is the next logical step in this progression providing 10Gbps of bi-directional bandwidth while maintaining backward compatibility with previous USB versions.

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