XPost: sci.electronics.design   
   From: DLU1@DecadentLinuxUser.org   
      
   On Sat, 08 Aug 2015 08:53:14 +0100, TTman  Gave   
   us:   
      
   >On 08/08/2015 06:50, DaveC wrote:   
   >> USB uses differential signaling, D- and D+ signal lines. Since it’s   
   >> differential, is absolute polarity important? If, for example, I mix up the   
   >> two conductors on a USB device I’m rewiring, is this critical?   
   >>   
   >>   
   >> Just curious…   
   >>   
   >> Thanks,   
   >> Dave   
   >>   
   >Yes it's imperative you get it right   
   >   
      
     Yes.  ALL FOUR conductors, not just the signal pair.   
      
     Two are power.  Does it make sense to you that reversing those would   
   be OK?   
      
     Or mixing any from each set?   
      
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