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P2020 PHY control problem

Question asked by byeong seong Jang on Mar 29, 2017
Latest reply on Mar 30, 2017 by ufedor

P2020 PHY control problem ..


P2020 related questions.

Related to TSEC2 Ethernet PHY chip control
MDC, MDIO port measurement result
PHY chip control waveform on P2020 (measured by oscilloscope): Normal
Response waveform on PHY chip: Normal
However, output using MII utility commands:
The chip ID value is read as 0000
Even if PHY chip is removed, chip ID value is read as 0000
(Note: TSEC3 Ethernet PHY chip is normally accessed)

TSEC2, 3 use the same PHY chip

I'm curious about the solution.
Thank you.