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USB 3.2 Doubles Maximum Possible Bandwidth With a Type-C Cable

posted by martyb on Thursday July 27 2017, @01:58PM   Printer-friendly
from the doubled-USB-is-half-TB3 dept.

takyon writes:

One cable to rule them all... for now:

The USB 3.0 Promoters Group announced an update to the existing USB 3.1 standard in order to double the maximum possible bandwidth from 10 Gbps to 20 Gbps. This USB 3.2 specification is currently in the final draft review phase. USB 3.2 will remain backward compatible with existing USB devices.

The new specifications will retain the USB 3.1 physical layer data rates and encoding techniques. The doubling of bandwidth is achieved by going in for a two-channel operation (current USB 3.1 Gen 1/2 devices use only one 'super-speed' channel).The use of two channels is possible only if a certified USB 3.1 Type-C cable is used to connect the host and the device.

[...] The USB 3.2 update is consumer-friendly, since backwards compatibility is retained and there is no need for any new cables. Thunderbolt 3 also uses Type-C, and can go up to 40 Gbps. Its specifications are being opened up, and that makes future developments in the USB Type-C space worth keeping an eye on.

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  • (Score: 3, Insightful) by kaszz on Thursday July 27 2017, @02:03PM (1 child)

    by kaszz (4211) on Thursday July 27 2017, @02:03PM (#545172) Journal

    Still half-duplex? and the connectors look like gene-splicing gone wrong..
    Let's not forget polling and strict host-device tree structure. The USB API is also overly complex, compare with SCSI.

    Thunderbolt seems like a better hope?

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  • (Score: 5, Informative) by LoRdTAW on Thursday July 27 2017, @02:45PM

    by LoRdTAW (3755) on Thursday July 27 2017, @02:45PM (#545191) Journal

    USB 1&2 are half duplex. USB 3.x and C are full duplex and support interrupts without polling.

    See:
    http://inno-logic.com/usb-3-superspeed-overview.php [inno-logic.com]
    https://en.wikipedia.org/wiki/USB_3.0#Overview [wikipedia.org]