people see "D+" and "D-" in the USB 1.1/2.0 pinout and assume it's differential whereas it's... not. it's actually a bus based on two single ended, DC-unbalanced lines that carry the inverse of each other most of the time. it only really helps with EMI and nothing more
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They *do* use a comma (bit stuff violation) for HS EOP. But they still require a HS squelch circuit (an *absolute* differential threshold receiver that measures when the swing is too low) to detect invalid/bus idle state for other reasons.pic.twitter.com/ikUM18s5YY
Thanks. Twitter will use this to make your timeline better. UndoUndo
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So it is differential after all?
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It's shitty cursed differential.
End of conversation
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