using the fsmc to boot from NOR and run with pSRAM -MCP - STM32F439

[eli_az]

Posted on February 28, 2016 at 13:43

Hi.

I would like to understand wheather it is possible to use the FSMC of the STM32F439 to interface with a MCP module  - NOR FLASH+pSRAM, where the address and data are shared and multiplexed .

I see that there is a bank for NOR /PSRAM , but is it possible to work with both on the same chip ?

will it be possible to boot from the nor and run with the RAM after ? does the driver support address/data multiplexing ?

thank you !

Daniel

[Tesla DeLorean]

Posted on February 28, 2016 at 14:09

Well ''booting'' from external memory is problematic because you need something to configure the pins, buses, and settings, which are part/board specific.

In the STM32 you'd need to have some minimal code in FLASH which brings up the interfaces in the desired fashion, and then transfers control.