STM32U585 + LAN9250, which bus to use? SDMMC or Quad SPI from OCTOSPI?

[manoj-j]

I want to use LAN9250 with STM32U585RITxQ (64pin package) controller using SPI/SQI interface as described in Microchip's datasheet.

I find similar interface on STM32 as OctoSPI (using Quad SPI) and SDMMC which looks similar to me.

So I don't know which one is the correct choice. I need to use it at as highest data rate as possible (so 4 bit bus...).

Personally I don't think OctoSPI (using Quad SPI) is compatible with this as it is design for Memory. But I am not sure right now.

Can anybody help me decide on this?

[KDJEM.1]

Hello @manoj-j and welcome to the community;

For the OCTOSPI interface, you need to verify if this interface is supported by the device. The command format and order shared in the device datasheet must be aligned with the command format and order mentioned in the STM32 reference.

Thank you.

Kaouthar