STM32 Ethernet

[DCtech]

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?

[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