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   sci.electronics.repair      Fixing electronic equipment      124,925 messages   

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   Message 124,268 of 124,925   
   Roger Hayter to peter@easthope.ca   
   Re: Re (2): USB functionality.   
   12 Mar 24 17:28:18   
   
   From: roger@hayter.org   
      
   On 12 Mar 2024 at 16:29:31 GMT, "peter@easthope.ca"  wrote:   
      
   > In article <2219572717.2fe80b82@uninhabited.net>, Roger Hayter   
   >  wrote:   
   >> But can even USB-C accept a signal input (keyboard and mouse for   
   >> instance) and unrelated signal output (audio for instance) on the   
   >> same physical socket? I ask only out of curiosity.   
   >   
   > The setup is rarely tried.  Appears that nobody can reply.   
   >   
   > A keyboard or mouse sends tiny amounts of data; a few bytes per   
   > second. In principle the link should be able to fit that in without   
   > significant drop-outs in audio output.  WIth so many details involved,   
   > a general answer is difficult. When all else fails, we can test and   
   > see what happens.  =8~)   
   >   
   > Regards,             ... P.   
      
   So you could use an overarching protocol which was bilateral (ethernet   
   anyone?) and send and separate messages both ways.  What I was aksing was   
   whether within the USB protocol there was provision for using some pins in for   
   one electrical signal (bi or uni-directional) and other pins for another   
   electrical signal. Because that would be the only way to do it without special   
   software on at least one of the devices.   
      
   --   
   Roger Hayter   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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