STM32N657L0 NOR flash XIP/LRUN problem

[javad321javad]

Hi,

I’m trying to run a simple FSBL application from NOR flash on a custom STM32N657L0 board. The application runs without any issues in Dev-Mode from RAM. However, when I sign and flash the same application, it does not run.

I’m using a custom external flash loader for the W25Q64JV NOR flash, based on the template provided in the STM32Cube repository. I’ve attached it for your reference.

I also have a question regarding VDDCORE. It is currently set to 0.89 V, while we are operating in normal-speed mode. Should we reduce the voltage to 0.8 V? Could the current VDDCORE setting be a potential cause of the problem?

General info:

• Board is working with 3v3 domain
• XSPI2 is used.
• HSE with no PLL is used (48MHz).

I have used the following the guides provided by ST for the tests:

 

 

 

[KDJEM.1]

Hello ​@javad321javad and welcome to the community;

 

Could you please to check your external loader configuration.

May be this wiki Getting started with External memory Manager and External memory loader - stm32mcu can help you.

 

Thank you.

Kaouthar

[javad321javad]

Hi ​@KDJEM.1 ,
Thanks a lot for your reply,
I have checked that link and modified my project configuation based on”W25Q64JV” NOR flash. To be compatible with the default setings to read from XSPI1/Single line, I also modified the project configuartion to use XSPI1.

Still not able to run from the flash.

Now the configuation looks like this:

• For XSPI1:

• For MXSPI:

• For EXTMEM_MANAGER:

and

• For EXTMEM_LOADER:

• PWR

 

[javad321javad]

The problem was in hardware. the VDDA1v8PLL was not connected. After fixing the hardware issue, it starts to works. Thanks for your help and support.

[KDJEM.1]

Hello ​@javad321javad ,

 

Glad to know that the issue has been resolved, and I want to thank you for coming back to the community to share the solution.

Thank you for your contribution in STCommunity.

 

Kaouthar