XPost: sci.electronics.design   
   From: this@is.not.me.com   
      
   On 8/7/2015 10:50 PM, DaveC wrote:   
   > USB uses differential signaling, D- and D+ signal lines. Since it’s   
   > differential, is absolute polarity important?   
      
   Of *course* it is!  Do you think you can replace every '0'   
   with a '1' and still get the same *meaning*?   
      
   > If, for example, I mix up the   
   > two conductors on a USB device I’m rewiring, is this critical?   
      
   Yes.   
      
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    * Origin: you cannot sedate... all the things you hate (1:229/2)