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p1012: How to detect end of frame in the transparent controller?

Question asked by carl peng on Nov 23, 2016
Latest reply on Nov 24, 2016 by Serguei Podiatchev

Hello,

I have some puzzles for transparent controller of p1012 QE, could you please give some suggestions? 

The questions is:  how to detect end of frame in the transparent transfer?

 

As the QEIWRM.pdf said, user must use the CD line to alert the transparent controller of the end of frame.

but as the below figure show:

we can find that, if CD is negation, will be CD lost, then in the RxBD, the CD flag will be set, controller consider

that a CD lost happened, and the frame will be discarded.

so, my question is how to use CD line to alert the end of frame?

 

Thank you!

Carl

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