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

Maksh.1 · ‎2021-08-03

OlivierK · ‎2021-08-03

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

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Maksh.1 · ‎2021-08-03

Thanks @OlivierK

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

OlivierK · ‎2021-08-04

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.

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