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Does BF537 MDIO pin have an internal pullup?

Question asked by TomGuthrie on May 25, 2011
Latest reply on May 31, 2011 by TomGuthrie

I am using the BF537 with the SMSC LAN8700 Ethernet PHI. My PCBs have been working in the field, but I noticed that I left off the pull-up resistor on the MDIO line. Most of my boards work, but a few fail a basic Ethernet PHI loopback test. How can the circuit work at all if the pullup is missing? Does the the BF537 have an internal pullup?

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