Hi,

my question is slightly off-topic since its affects a property of
USB that's presumably standardized. Nevertheless, I'm unable to
find any definite information on this:

Is it correct that the root hub of a host controller has always
address 255 on the given USB bus?

If this is the case, then there are device addresses 0 to 126 +
255 (the root hub), correct? 

Thanks in advance,
/Markus


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