XPost: alt.windows7.general   
   From: nospam@needed.invalid   
      
   On 2/29/2024 5:25 AM, Dan Purgert wrote:   
   > On 2024-02-29, J. P. Gilliver wrote:   
   >> In message  at Wed, 28 Feb 2024 17:14:29,   
   >> Dan Purgert  writes   
   >>> On 2024-02-28, J. P. Gilliver wrote:   
   >>>> [...]I continue to be surprised when such a standard does arise _and   
   >>>> is implemented widely_ - such as ISA, ATX, PCI, and USB (though that   
   >>>> last has so many connectors that it's lost its early attraction).   
   >>>   
   >>> There are ... 5 total (6 if you count the short-lived "USB-3 Micro-B   
   >>> Connector"), over the span of 25 years.  That's honestly not very bad at   
   >>> all, and a far sight better than earlier options where everything was   
   >>> different.  Nowadays, it's all converging back to USB-C, so ...   
   >>>   
   >>>   
   >> Type A - the default you get on PCs/laptops. Type B - the almost square   
   >> one you get on printers and _some_ scanners. At least three small   
   >> non-turn-over-able ones (at least two of which I always feel are   
   >> susceptible to easy damage). Type C. That's just the mechanical ones,   
   >> before you get into the extra connections, varying speeds, varying power   
   >> capabilities..   
   >   
   > Yeah, thought you were talking about the mechanical connectors moreso   
   > than "well, we have USB1.1, USB2, USB3[.n] ... ".  At least it's mostly   
   > all backwards-compatible down to USB1.1 on the protocol side :)   
      
   Since nobody buys all these things, we'll never know :-)   
      
      "Backward Compatibility   
      
       Another significant change with USB4 V2 is backward compatibility.   
       The new standard will be compatible with the original version of   
       USB4, USB 3.2, USB 2.0, and Thunderbolt 3. Thanks to this new feature,   
       you can get the best performance possible across all your devices with one   
   system.   
      "   
      
   USB 1.1 likely has too high of a signal swing, to work with the new stuff.   
      
   https://www.analog.com/en/resources/analog-dialogue/articles/swi   
   ching-in-usb-consumer-applications.html   
      
                                 USB 1.1          USB 2.0   
      Single-Ended Amplitude     0 V to 3.3 V     0 V to 400 mV   
      
   Wouldn't it be nice if there was a single table indicating   
   what things you could mix ?   
      
     Paul   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)