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May 5, 2020
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STM32 Ethernet

  • May 5, 2020
  • 1 reply
  • 727 views

I use ethernet switch instead of PHY with stm32f4. While RMII pins are connected to STM32, I manage MDIO pins with SPI.There is basic things whic is I can not understand.What is the difference between the autonegation,speed settings in STM32 ethernet driver configuration and switch autonegation,speed configuration?

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    Best answer by Pavel A.

    Depends on the switch.

    If it is like Micrel /Microchip KS: STM32 connects to its internal port which has fixed parameters, so don't autonegotiate, just match these parameters.

    Enable autonegotiation on external ports of the switch, if desired.

    -- pa

    1 reply

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    Pavel A.Answer
    Super User
    May 5, 2020

    Depends on the switch.

    If it is like Micrel /Microchip KS: STM32 connects to its internal port which has fixed parameters, so don't autonegotiate, just match these parameters.

    Enable autonegotiation on external ports of the switch, if desired.

    -- pa

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