Tuesday, October 18th 2022
USB-IF Announces Publication of New USB4 Specification to Enable USB 80 Gbps Performance
USB Implementers Forum (USB-IF), the support organization for the advancement and adoption of USB technology, today announced the publication of the USB4 Version 2.0 specification, a major update to enable USB 80 Gbps performance over the USB Type-C cable and connector. The updated USB4 specification doubles the maximum aggregate bandwidth of USB to the benefit of higher-performance displays, storage, and USB-based hubs and docks. The USB Type-C and USB Power Delivery (USB PD) specifications have also been updated to support this higher level of data performance.
"For engineers, USB4 is defined by its multi-protocol tunneling that architecturally differentiates it from its predecessors - USB 3.2 and USB 2.0," said Brad Saunders, USB-IF Board Chair and CEO. "This updated technical specification extends USB4 speed and data protocol performance, enabling manufacturers to develop products that can deliver USB 80 Gbps in addition to existing USB 40 Gbps and USB 20 Gbps to end users."
Key characteristics of the updated USB 80 Gbps solution include:
USB Developer Days 2022 will include detailed technical training covering the latest updates to the USB4, USB Type-C and USB PD specifications.
Source:
USB-IF
"For engineers, USB4 is defined by its multi-protocol tunneling that architecturally differentiates it from its predecessors - USB 3.2 and USB 2.0," said Brad Saunders, USB-IF Board Chair and CEO. "This updated technical specification extends USB4 speed and data protocol performance, enabling manufacturers to develop products that can deliver USB 80 Gbps in addition to existing USB 40 Gbps and USB 20 Gbps to end users."
- Up to 80 Gbps operation, utilizing a new physical layer architecture based on PAM3 signal encoding, over existing 40 Gbps USB Type-C passive cables and newly defined 80 Gbps USB Type-C active cables.
- Optionally for certain applications, such as driving very-high performance USB4-based displays, the USB Type-C signal interface can be configured asymmetrically to deliver up to 120 Gbps in one direction while retaining 40 Gbps in the other direction.
- Updates to data and display protocols to better use the increase in available bandwidth
- USB data architecture updates now enable Enhanced SuperSpeed USB data tunneling to exceed 20 Gbps.
- Aligns with DisplayPort Revision 2.1 and PCI Express Revision 4.
- Backward compatibility with all previous versions of USB.
USB Developer Days 2022 will include detailed technical training covering the latest updates to the USB4, USB Type-C and USB PD specifications.
15 Comments on USB-IF Announces Publication of New USB4 Specification to Enable USB 80 Gbps Performance
USB 3.12.1
USB 3x2
USB 3 Pro
USB 4 Max Pro
USB 3 Pro Max Ultra
USB 4
USB 4 Pro
Or one of these, for Power Delivery stuff:
... but they literally just announced the 80 gbps version and now they're announcing 120 gbps?
:eek:
USBe Gen1 x(#of lanes)
USBe Gen2 x(#of lanes)
USBe Gen3 x(#of lanes)
USBe Gen4 x(#of lanes)
They've already drawn
ireaggro; might as well roll with it.The 120 Gbps options is actually 120/40 Gbps, so 120 Gbps to a display, with DP tunneling and 40 Gbps to the PC from the display (acting as a hub).
It's all part of the 80 Gbps spec. They just take an extra pair of lanes for upstreams data and use a single pair for downstreams data. The other way around is admittedly also possible, but less likely.
Contrary to popular belief, Gen[Y]x[Z] is a great naming scheme. A shame they decided to bend to pressure from the public.
If the versioning of something is so harmonious to human mind, then it is either too outdated to have uncertainty, or as restrictive as a private product from a company.
It'd be like when AGP left us we called PCIe:
PCI2 gen1 1x16
PCI3 gen1 2x16
PCI2 gen1 1x8
PCI3 gen1 2x8
PCI2 gen1 1x4
PCI3 gen1 2x2
PCI2 gen1 1x1