Hi, I am considering STM32H725 series microcontroller in a design. 1. Can RTL8201F ethernet PHY from Realtek be used with STM32H725 series microcontroller? 3. Does STM32H725 series has necessary libraries for Realtek Ethernet PHY ICs.

[TDK]

1. STM32H7 supports both RMII and MII connection to PHY. The RTL8201F supports both of these types. So yes.

3. Once configured, the PHY should be transparent. There aren't PHY-specific things needed. STM32H7 library has support for LwIP for various ethernet communication protocols. There are examples.

https://community.st.com/s/article/How-to-create-project-for-STM32H7-with-Ethernet-and-LwIP-stack-working

[Piranha]

All typically required things are common, except for two - the speed and duplex status bits of the auto-negotiation result are PHY specific and located in PHY specific register.