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eli_az
eli_az
Associate II
February 28, 2016
Question

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

  • February 28, 2016
  • 1 reply
  • 528 views
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
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    1 reply

    Tesla DeLorean
    Tesla DeLorean
    Guru
    February 28, 2016
    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.

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