This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

DP83867IS: register read/write issue, read constant D97D for all registers

Part Number: DP83867IS

We have connected four PHY with address 0x00, 0x03, 0x0C and 0x0F. All three PHY works fine except PHY with address 0x0C reads out the the constant value D97D for all registers. Cannot even write to any registers of this PHY.

It is not able to read correct model, OUI, and Rev number. Only its PHY address seems to be correct i.e 0x0C. Please find the snapshot attached. Any suggestions on this what can go wrong? Thank you