Honored Contributor
Honored ContributorUgh. Had the document near completion last night and realized it's just not organized correctly, making some issues more confusing than they need to be. Will be delayed a few days to re-work.
I haven't looked at the AN directly that you quoted above, but it really depends on the definition of skew for a source-synchronous interface(and I don't know if there is one). I generally take the data delay to be the positive number, so a skew of 1ns means the data delay is 1ns longer than the clock, whereas a skew of -1ns means it is 1ns shorter. I've tried to explicitly state "the data delay skewed in relation to the clock delay". I'd be curious if a) you agree with that usage and b) if the wording makes sense. (I've seen other datasheets that just say skew but don't define it. If it's symmetric, i.e. +/-1ns, that's fine since both definitions come to the same conclusion, but often you have to go to their waveforms to decipher the meaning...)
