Re: Ethernet PHY chip discovery not working on 855T with 971/972 chips

Dan Malek wrote:

Dean Matsen wrote:

quoted

Yes, I see we have no pullup on that line. We do dedicated HVAC
applications, so we
don't need to do this search.

But.......the hardware is broken. The MDIO is supposed to be
an open-drain with a pullup. I guess you may be lucky the
ends of the connection are driving the line proplerly, but it
could be luck that will run out someday.


-- Dan

Well, I don't disagree there. We're going to investigate updating the
schematics for future products. Thanks for the input.


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