Unable to Configure DDR3 for Cortex-M4 using CubeMX. If DDR3 is dedicated for Cortex-A7 only , how Cortex-M4 is running

[Maksh.1]

[OlivierK]

Hi Maksh.1 (Community Member)

Indeed, DDR is dedicated to Cortex-A7. Cortex-M4 can run out of SystemRAM or external storage via QSPI/FMC

https://wiki.st.com/stm32mpu/wiki/STM32MP15_peripherals_overview

[Maksh.1]

Thanks @OlivierK​ 

It means by default Cortex-M4 runs on SystemRAM unless we configure FMC to Cortex-M4

[OlivierK]

Hi Maksh.1 (Community Member)

That's correct, the Cortex-M4 runs by default on MCU-RAM (not SystemRAM as previously mentioned) unless FMC or an external memory interface is configured.