The USB Implementers Forum has announced the publication of USB4! The specification is available to download now as part of the document library of USB.org.
USB Implementers Forum Announces the Publication of Its Thunderbolt 3-Based USB4 Standard article tells that USB 4 offers up to 40Gb/s throughput, PCI Express, and DisplayPort connectivity — plus compatibility back to USB 2.0.
USB4 is built around Intel’s Thunderbolt connectivity standard, which incorporates PCI Express and DisplayPort plus power delivery connectivity in a single cable.
USB4 is promised to be be fully backwards compatible with previous USB devices from the current top-end USB 3.2 Gen 2×2 standard down to USB 2.0 (though not now very rarely used USB 1.0). USB4 will be compatible with existing USB Type-C cables.
77 Comments
Tomi Engdahl says:
https://www.usb.org/sites/default/files/usb_data_performance_language_usage_guidelines_september_2022.pdf
https://www.usb.org/sites/default/files/usb-if_usb_type-c_cable_logo_usage_guidelines_final_20220928.pdf
Tomi Engdahl says:
https://www.graniteriverlabs.com/en-us/technical-blog/usb-logo-new-guidelines
https://www.itechtics.com/usb-logos/
Tomi Engdahl says:
https://www.techpowerup.com/299488/the-usb-if-announces-new-logos-kills-off-superspeed-branding
https://www.enablingusb.org/certification/
Tomi Engdahl says:
https://www.itechtics.com/usb-logos/
https://www.graniteriverlabs.com/en-us/technical-blog/usb-logo-new-guidelines
https://arstechnica.com/gadgets/2021/09/usb-if-is-once-again-trying-to-logo-its-way-out-of-usb-c-confusion/
Tomi Engdahl says:
https://www.usb.org/logo-license
Tomi Engdahl says:
COM Express -kortit saavat nopeammat sarjaväylät
https://etn.fi/index.php/13-news/14230-com-express-kortit-saavat-nopeammat-sarjavaeylaet
COM Express on erittäin suosittu sulautettujen laitteiden korttiformaatti. Nyt alan standardeja kehittävä PICMG-konsortio on lanseerannut COM Expressiin uuden version 3.1. Se on ratifioitu tukemaan nopeita sarjaliitäntöjä, kuten PCIe Gen 4 ja USB4.
Nämä uudet väylärajapinnat pidentävät COM Expressin käyttöaikaa johtavana Computer-on-Module (COM) -standardina erilaisissa suorituskykyisissä järjestelmissä. Nopeaa signalointia tukemaan on COM Expressin tyypin 6, 7 ja 10 liitäntöihin lisätty rinnalle 16 gigabitin liitin. Myös SATA Gen 3 -signaalin eheys- ja häviöbudjettitiedot on lisätty jokaiselle tyypille.
Nämä parannukset liittyvät nastoituksen päivityksiin, mukaan lukien valinnainen USB4 (tyyppi 6), MIPI-CSI-liittimet (tyypit 6, 10), SoundWire (tyypit 6, 10) sekä ylimääräinen yleiskäyttöinen SPI-liitäntä (tyypit 6, 10). CEI-signalointia tukeva 10 GbE-liitäntä ja IPMB-hallintaliitäntä on myös nyt määritelty Type 7 -liitännässä osana COM.0 R3.1 -määritystä.
https://www.picmg.org/openstandards/com-express/
Tomi Engdahl says:
https://www.techpowerup.com/review/usb4-guide-info-technology-details/2.html
A key thing to note is that the standard is called “USB4,” not “USB 4.0″ or “USB 4,” and the USB-IF actually has two marketing names for USB4, namely “USB4 20 Gbps” and “USB4 40 Gbps.” The technical names are “USB4 Gen 2×2″ and “USB Gen 3×2,” but there’s also “USB4 Gen 2×1″ and “USB4 Gen 3×1,” both of which are fallback protocols in case of interference or a bad cable, and both rely on a single cable pair. Normally, both cable pairs are used, so using just one cable pair will cut speeds in half.
USB4 has to support at least one display output, but unlike previous USB standards, the DisplayPort signal is tunnelled rather than using DP Alt Mode. That said, DP Alt Mode is still supported for older devices, as well as for DP 2.0 devices. The advantage of tunnelling is that a single cable can in theory transmit USB4, DisplayPort, and PCIe signals at the same time, something that wasn’t possible with previous versions of USB. This is also how Thunderbolt 4 works and why the two standards are so similar.
Unlike DP Alt Mode, which physically takes over two wire pairs of the four pairs in a USB Type-C cable for exclusive use for DisplayPort signals, tunnelling allows the DP 1.4 signal to be transmitted simultaneously with USB4 or PCIe signals.
Tomi Engdahl says:
https://www.picmg.org/openstandards/com-express/
COM Express® Module Base Specification Rev 3.1
https://www.picmg.org/product/com-express-module-base-specification-rev-3-1/
Tomi Engdahl says:
PICMG consortium ratifies COM Express 3.1 to support high-speed serial interfaces
https://militaryembedded.com/radar-ew/signal-processing/picmg-consortium-ratifies-com-express-31-to-support-high-speed-serial-interfaces
WAKEFIELD, Mass. The PICMG consortium has ratified the new COM Express 3.1 specification to support high-speed serial interfaces such as PCIe Gen 4 and USB4.
To support this high-speed signaling, an updated 16 Gb/sec connector has been specified across the family’s Type 6, 7, and 10 pinouts and added SATA Gen 3 signal-integrity and loss budget information. These improvements join pinout-specific upgrades including optional USB4 (Type 6), MIPI-CSI connectors (Types 6, 10), SoundWire (Types 6, 10), as well as an additional general-purpose SPI interface (Types 6, 10). A CEI signaling-enabled 10 GbE interface and IPMB management interface are also now defined in the Type 7 pinout as part of COM.0 R3.1.
Jeff Munch, CTO of Adlink Technology and chairman of the COM Express subcommittee, said of the newly ratified 3.1 standard: “In the latest release of the COM Express specification, the subcommittee has added support for PCI Express Gen 4, USB4, and newer 10G side-band interfaces while maximizing backwards compatibility.”
PICMG® Releases Its Newest COM.0 R3.1 Spec for COM Express to Include PCIe Gen 4 and USB 4.0 Support
COM Express R3.1 Compliant Modules — ADLINK Express-ADP Type 6 Basic size and Express-ID7 Type 7 Basic size Now Available
https://www.adlinktech.com/en/news/picmg-com-express-r31-module
Compared to R3.0, Revision 3.1 has added support for several advanced interfaces suitable for next-gen AIoT applications, such as PCIe Gen 4 support across all module types, USB4 for Type 6 and adding a second PCIe Clock while updating 10G Ethernet to support CEI side-band signaling for Type 7. Other enhancements include adding options for general purpose SPI, MIPI-CSI connectors, and SoundWire, as well as adding IPMB for Type 7.
ADLINK Express-ADP Type 6 Basic size utilizes 12th Gen Intel® Core™ processors based on advanced hybrid architecture with up to 6 Performance-cores (P-cores) and 8 Efficient-cores (E-cores), effectively boosting productivity and fueling IoT innovation across a wide variety of deployments. It provides DDR5 memory support with up to 4800 MT/s combined with increased cache, and integrated Intel® Iris® Xe graphics with up to 96EUs, to offer four concurrent 4K60 HDR displays and Intel® Deep Learning Boost for superior AI performance. Using DDI, eDP 1.4b and USB4/TBT4, the four independent displays support Display Alternative mode, the module provides premium graphics features for superior content support, display and I/O virtualization.
Tomi Engdahl says:
https://www.techadvisor.com/article/725034/best-thunderbolt-4-and-usb4-hubs-and-docks.html
Tomi Engdahl says:
https://sphinxpc.in/amds-chipset-driver-now-supports-usb4-some-bug-fixes-introduced/
Tomi Engdahl says:
https://www.neowin.net/news/latest-amd-chipset-driver-brings-additional-am5-support-sha256-and-usb4-debugging/
Tomi Engdahl says:
https://www.tomsguide.com/features/thunderbolt-4-vs-usb4-whats-the-difference
Tomi Engdahl says:
USB4 is a Glorious Mess
https://www.youtube.com/watch?v=C6aCCp-Umcw
USB has never been easy to understand, and USB4 is no exception. How compatible is it with Thunderbolt 3? What about Thunderbolt 4? What cables can and can’t be used? Is a USB4 cable interchangeable with a Thunderbolt 4 cable?
0:00 USB 4 is soooo confusing
1:25 What is USB 4?
4:47 Connecting TB devices to USB4 ports
7:30 MacOS vs. Windows
9:47 Older TB product compatibility
10:32 Daisy Chaining
12:38 External GPU
13:17 Watch Linus break things
15:39 Is USB4 compatible with TB3/4 devices?
Tomi Engdahl says:
Newly Branded USB Pushes 80 Gb/s
April 7, 2023
Jeff Ravencraft talks about the latest USB labeling, performance, and power-delivery support.
https://www.mwrf.com/technologies/systems/video/21263480/newly-branded-usb-pushes-80-gbs?utm_source=RF+MWRF+Wireless+for+Consumers&utm_medium=email&utm_campaign=CPS230407083&o_eid=7211D2691390C9R&rdx.identpull=omeda|7211D2691390C9R&oly_enc_id=7211D2691390C9R
he USB Implementers Forum (USB-IF) is the manager of all things dealing with the Universal Serial Bus (USB). The Type-C connector not only dominates USB implementations, but older versions still exist and the protocols remain upward-compatible. I talked with Jeff Ravencraft, President and COO of USB-IF (see video above), about the latest technical capabilities and the new branding that should make it easier for consumers to understand what they’re buying.
These days, the top speed limit of USB on a Type-C connections is 80 Gb/s in both directions (see figure). There’s an interesting but unlabeled version pushing 120 Gb/s in one direction and 40 Gb/s in the other (same total throughput) that targets high-resolution multiple-monitor support, but most will utilize 80-Gb/s or lower speeds.
In addition, the USB power-delivery standard now cranks out up to 240 W of power. In theory, certified cables must run at least at the 400-Mb/s Hi-Speed USB rate. These days, though, the 5 Gb/s over a Type-C cable tends to be the minimum needed for data transfers.
Likewise, the 5-W limit of the much older USB connections has been replaced with a 60- and 240-W standard. These are specs for the cable and the power delivery (PD) of a source. The power requirements of a device are negotiated by the USB PD protocol. Multiple voltages and current settings can be supported by USB devices now to provide a more flexible and power-efficient interface. It’s also possible for a device to be a source as well as a sink at different times. This allows a smartphone to power a display or a display could charge a smartphone.
The new PD standard adds three fixed voltages to the mix: 28, 36, and 48 V. The prior standard included 5, 9, 15, and 20 V. It’s also possible to have an adjustable voltage between 15 V and the three new higher voltages in the mix. In addition, it allows devices to negotiate the amount of power provided with a 100-mV resolution.
Tomi Engdahl says:
Newly Branded USB Pushes 80 Gb/s
April 7, 2023
Jeff Ravencraft talks about the latest USB labeling, performance, and power-delivery support.
https://www.mwrf.com/technologies/systems/video/21263480/newly-branded-usb-pushes-80-gbs?utm_source=RF+MWRF+Today&utm_medium=email&utm_campaign=CPS230407100&o_eid=7211D2691390C9R&rdx.identpull=omeda|7211D2691390C9R&oly_enc_id=7211D2691390C9R
These days, the top speed limit of USB on a Type-C connections is 80 Gb/s in both directions (see figure). There’s an interesting but unlabeled version pushing 120 Gb/s in one direction and 40 Gb/s in the other (same total throughput) that targets high-resolution multiple-monitor support, but most will utilize 80-Gb/s or lower speeds.
Tomi Engdahl says:
https://www.phoronix.com/news/Intel-Linux-thunderbolt-utils
Tomi Engdahl says:
https://etn.fi/index.php/new-products/15409-80-gigabitin-usb4-tuli-heti-tuotteina
Tomi Engdahl says:
https://etn.fi/index.php/13-news/15427-ensi-vuonna-tuleva-thunderbolt-5-hakkaa-kaikki-muut-liitaennaet
Tomi Engdahl says:
https://muropaketti.com/yleinen/adata-julkaisi-ulkoisen-usb4-liitantaisen-ssd-aseman-jaahdytetty-vauhtivarasto/
Tomi Engdahl says:
https://etn.fi/index.php/13-news/15739-windowsin-usb-kiihtyy-ennaetysnopeuteen
Tomi Engdahl says:
https://hackaday.com/2024/01/16/50-10gbps-mesh-network-uses-usb4/
Tomi Engdahl says:
https://fangpenlin.com/posts/2024/01/14/high-speed-usb4-mesh-network/
Tomi Engdahl says:
The state of USB is a mess and there’s nothing we can do to fix it
BY
BRADY SNYDER
PUBLISHED JUN 8, 2024
https://www.xda-developers.com/the-state-of-usb-is-a-mess/
USB-C was supposed to be the port to replace all the other ports. But as more products use USB-C, things are only getting more confusing.
KEY TAKEAWAYS
USB-C is a mess due to various supported specifications, creating confusion for users and manufacturers alike.
The naming schemes for USB 3.1 and USB 3.2 created by USB IF caused confusion, making it hard to differentiate between them.
Manufacturers need to streamline USB-C ports to all support the same specifications and avoid using multiple USB versions.
Tomi Engdahl says:
Anritsu introduces a Receiver Test Solution that Supports USB4® Version 2.0 with 80 Gbit/s Data Transmission Speed
https://www.anritsu.com/en-gb/test-measurement/news/news-releases/2024/2024-09-03-gb01
Tomi Engdahl says:
Vihdoin 20 gigabitin yhteys USB-oheislaitteeseen
https://etn.fi/index.php/new-products/16679-vihdoin-20-gigabitin-yhteys-usb-oheislaitteeseen
Infineon Technologies on julkistanut EZ-USB-sarjaan uuden ohjelmoitavan FX20-ohjaimen, joka tarjoaa ensimmäistä kertaa jopa 20 gigabitin datanopeuden USB-oheislaitteeseen.
EZ-USB FX20-ohjaimen ansiosta tiedonsiirto nopeutuu merkittävästi, jopa kuusinkertaiseksi verrattuna edeltäjäänsä eli EZ-USB FX3 -piiriin. Uusi ohjain sisältää myös LVDS-liitännän, mikä mahdollistaa suuren kaistanleveyden ja parantaa laitteen suorituskykyä.
Uusi ohjain tulee markkinoille vuoden 2025 ensimmäisellä neljänneksellä
Digitalization via USB 20Gbps for AI, imaging and emerging applications
Connecting the analog realm with EZ-USB™ FX family
https://www.infineon.com/cms/en/product/promopages/ez-usb-fx/?redirId=282083
For over a decade, EZ-USB™ FX3 has played a critical role in machine learning applications, being the gold-standard building block providing USB 5Gbps connectivity to machine vision cameras, spectrum analysers and many high-bandwidth data acquisition systems. With the growing digitalization of the real world driven by AI, the demand for databases and higher-speed interfaces has been rocketing in all industries.
Since 2021, Infineon, as the USB market leader, has invested tens of millions of dollars into the development of the next-generation general-purpose USB peripheral controllers. After three years of development, EZ-USB™ FX20, with up to 600% higher performance than its predecessor, is finally here to deliver USB 20Gbps performance for AI, imaging and emerging applications.
Tomi Engdahl says:
https://wccftech.com/usb4-2-0-80-gbps-240w-power-delivery-certified-cables-available/