Are all cables that have a USB-C connector automatically USB 3.0 or 3.1 compliant?
Vou apenas responder à pergunta contida no título, porque ela começa uma pergunta muito melhor do que suas outras perguntas.
Para simplificar, não, todos os cabos USB tipo C não são criados iguais. Benson Leung, um engenheiro do Google, passou um tempo considerável enviando revisões de cabos USB Type-C para a Amazon.
Ele tem centenas de resenhas de produtos, mas com base nessas análises pode-se concluir que um fabricante pode produzir um cabo que tecnicamente funciona, mas que na verdade não está em conformidade com o padrão USB real.
Benson Leung
However, as I understand it, the letters refer to the exterior HW interface and the numbers describe the interior mechanism.
Eu assumo por "letras" você quer dizer a indicação de que tipo de conector é? O cabo deve estar em conformidade com o mesmo padrão da porta, conectores USB fora dos conectores Tipo-C e compatíveis com padrões anteriores.
Who's right?
Eu não colocaria muito peso no conhecimento de um funcionário aleatório da BestBuy. Eu não diria que você estava correto também. Como assinalei, uma pessoa em quem você pode confiar lhe dará conselhos precisos, é claro, Benson Leung.
To lead off, my verdict: This cable does not follow the USB Type C specification Release 1.2. To find the specification, please go to usb.org, and look under developers/usbtypec.
The USB Type-C specification defines two types of Type-C cables: * Section 3.4.1 USB Full-Featured Type-C Cable Assembly for cables that support SuperSpeed operation * Section 3.4.2 USB 2.0 Type-C Cable Assembly for cables that only support USB 2.0.
Since Aukey advertises that this cable is capable of 10gbps operation and calls it a "USB 3.1 Gen 1" cable at least once in their product description, I will judge them based on Section 3.4.1 for a "Full-Featured" Type-C cable.
My analysis shows these serious problems with this cable, based on my visual analysis, and using my "Twinkie" PD Analyzer as well as Total Phase's Advanced Cable Tester.
- Missing USB certification and SuperSpeed logo This cable is not certified by USB-IF and lacks any identifying logo on the cable itself and on the box. This means that the cable is completely anonymous and a user may simply forget what kind of cable it is and not know it is one that supports SuperSpeed.
It is absolutely expected, given the possible complexity and range of functionality of a C-to-C cable that official USB-IF logos be used, and USB-IF certification must be done to reduce customer confusion.
- Missing required e-marker electronic identifier chip USB Type-C Specification Section 4.9 "Electronically Marked Cables" states, "All USB Full-Featured Type-C cables shall be electronically marked."
In my testing with a Twinkie PD Analyzer and the Total Phase Advanced Cable Tester, this cable lacks the required e-marker entirely, and will not work with sources and sinks that depend on checking the capabilities of the cable using the identifier chip.
- Missing 6 required data carrying wires. 4 SuperSpeed wires and 2 SBU wires USB Type-C Specification Table 3-10 "USB Full-Featured Type-C Standard Cable Assembly Wiring" lists 16 wires that are mandatory for that type of cable.
In my testing of the Aukey CB-CD7 using the Total Phase Advanced Cable Tester, only 9 wires are present. This cable is missing the following data wires: SDPp3, SDPn3, SDPp4, SDPn4, SBU_A, SBU_B.
As a result, this cable fails when Alternate Modes are used, the most common of which is DisplayPort Alternate Mode. When I tried using this cable to connect my Chromebook to an LG 4K monitor with USB-C, the cable failed to carry the 4k video to the monitor because of the 6 missing wires.
High IR drop on GND: 89.55 mΩ measured. 83.00 mΩ allowed by the USB Type-C specification. This may result in poor performance charging or no charging at all as high IR drop on GND may distrupt PD communication over CC.
SuperSpeed TX and RX fail signal integrity at 10gbps. Aukey claims that this is a USB 3.1 Gen 2 cable capable of 10gbps, but the Advanced Cable Tester on C-C / SS Gen 2 / 3A / SI default settings marks the cable as a fail for 10ghz signal integrity.
Aukey, please contact me if you have any questions on how to fix this cable. I would highly recommend stop selling this cable immediately, as it is at best a deceptive product for consumers.
For consumers, I do not recommend buying this cable, as it will not work with Chromebooks, MacBook Pros, or other Type-C devices that use DisplayPort or other Alternate Modes, as is expected of USB 3.1 Full Featured C-to-C cables. It is NOT futureproof like true Full-Featured C-to-C cables.
O Aukey CB-D36 viola a especificação USB; Falha em Modos Alternativos devido à falta de fios e falta do marcador de e-mail necessário.