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STM32F765 Ethernet stop working increasing MCU clock

Question asked by peregrinus on Sep 1, 2017
Latest reply on Sep 5, 2017 by peregrinus

Hi All, 

    I am working on a custom board using the STM32F765.

 

The ethernet peripheral is based on DP83620 connected in RMII. 

 

In my application the ethernet is working as the AHB clock is below 190MHz, then it stops to work. I am still trying to understand what happens, for sure when it does not work no data is transmitted. Sometimes reading the status flag of the IC, I read the no link. 

It seems and HW problem but I cant figure the reason. 

I wonder if it could be related to the silicon errata. I have the silicon "Z" revision.

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