Usage of M33 core in standalone mode in stm32mp257

srisatya2007 · ‎2026-03-04

Hi,

Can I use only M33 core as a standalone controller on stm32mp257 evaluation board without need of linux operating system and DDR

PatrickF · ‎2026-03-05

Hi @srisatya2007

This is what we name M33-TD, where Linux on A35 is optional (then you should question choice of STM32MP2 for only M33 core).

Please look to https://wiki.st.com/stm32mpu/wiki/How_to_migrate_STM32CubeMPU_examples_from_A35-TD_flavor_to_M33-TD_flavor

and https://wiki.st.com/stm32mpu/wiki/STM32MP2_boot_chain_overview#STM32MP2_M33-TD_flavor_boot_chain

In our SW deliveries, DDR is assumed mandatory due to limited internal RAM size and our default choice of having M33 TF-M and application code copied from external Flash to DDR instead of XiP (because XiP is limited to Serial-Flash/RAM and not possible on eMMC or SD-Card).
But you could probably build you SW differently (then with limited ST support).

Regards.

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