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Using SDRAM and NOR Flash

Question asked by ducommun.christophe on May 5, 2015
Latest reply on May 6, 2015 by ducommun.christophe
I have a simple project running on my STM324x9IEval Kit using external SDRAM and NOR Flash.

The project run correctly when a use only SDRAM, #define DATA_IN_ExtSDRAM is uncommented in system_stm32f4xx.c and my vars are located correctly in SDRAM.

The project run correctly when I use NOR Flash without external SDRAM.

But when I enable the external SDRAM and use the NOR Flash, the software crash when I try to erase or program the NOR Flash. The init and read are working.

When I tell the software crash, the debugguer lose the connection with the target and I can't see what is happening.

I have tryed to use external SRAM and NOR Flash, and the code work as expected.

Do you have any idea of the cause of this issue which is happening only when external SDRAM and NOR flash erase or write operation is executed ?