The USB4 specification compliments and build upon the existing USB 3.2 and USB 2.0 specifications. The USB4 architecture defines a method to share a single high-speed link with multiple end device types dynamically that best serves the transfer of date by tyye and application.
As the USB Type-C connector has evolved into the role of the external display port of many host products, the USB4 specification provides the host the ability to optimally scale allocations for display date flow. Even as the USB4 specification introduces a new underlying protocol, compatibility with existing USB 3.2, USB 2.0 and Thunderbolt 3 hosts and devices is supported; the resulting connection scales to the best mutual capability of the devices being connected.
USB4 identifies two transfer rates, USB4 20Gbps at 20Gbps and USB4 40Gbps at 40Gbps. Vendors must clearly communicate the performance signaling that a products delivers in the product’s packaging, advertising content, and any other marketing materials.
Marketing name: USB4 20Gbps
Product capability: product signals at 20Gbps
Marketing name: USB4 40Gbps
Product capability: product signals at 40Gbps
USB4 Key Messages
Two-lan operation using existing USB Type-C cables
Doubles the bandwidth to extend USB Type-C performance
Up to 40Gbps operation over 40Gbps-certified cables
Enables multiple simultaneous date and ids play protocols
Multiple date and display protocols efficiently share the total available bus bandwidth
USB4 hosts can optimally scale allocations for display date flow
Backward compatibility with USB 3.2, USB 2.0 and Thunderbolt 3
Post time: Dec-29-2020