Ethernet in MII mode

rak14 · ‎03-11-2023

Hi,

I'm using S32K148 Microcontroller, will it support MII mode with PHY?

What are settings needs to be done to work in MII mode?

Should TX_CLK and RX_CLK configured for 2.5MHz/25MHz?

PetrS · ‎03-13-2023

Hi,

yes, S32K148 support MII mode.
On MCU side, the ENET module have to be set for MII mode and all needed pins properly initialized.
Thy PHY must be set for MII mode as well, either using bootstrapping options or later by updating PHY registers using SMI interface.
TX_CLK/RX_CLK are inputs on MCU side, a PHY is generating those clock signals.

BR, Petr

View solution in original post

PetrS · ‎03-13-2023

Hi,

yes, S32K148 support MII mode.
On MCU side, the ENET module have to be set for MII mode and all needed pins properly initialized.
Thy PHY must be set for MII mode as well, either using bootstrapping options or later by updating PHY registers using SMI interface.
TX_CLK/RX_CLK are inputs on MCU side, a PHY is generating those clock signals.

BR, Petr