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Please teach me about FSMC in STM32 MCU

Junki
Associate

‎2025-03-23 11:41 PM - last edited on ‎2025-03-24 5:37 AM by

Please teach me about FSMC in STM32 MCU.

When the CPU communicates with external MRAM, can FSMC be used?

 

<MRAM specifications>

Interface Type:Parallel

Data Bus Width:16 bit

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mƎALLEm
ST Employee

‎2025-03-24 12:34 AM

Hello @Junki and welcome to the community,

You need to provide the MRAM part number and also the STM32 part number.

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Junki
Associate
In response to mƎALLEm

‎2025-03-24 12:54 AM

The STM32 is the STM32L4 series.
I can't provide the MRAM part number. How can I tell if FSMC can be used?

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mƎALLEm
ST Employee
In response to Junki

‎2025-03-24 1:11 AM - edited ‎2025-03-24 5:20 AM

You need to provide at least which signals are available on that MRAM: data/address/control and the power supply of that MRAM.

Otherwise, you need to check the datasheet of the STM32: the FSMC signals vs what is available on MRAM signals + the power supply.

Check also the application note AN4761 "Using STM32L476/486 FSMC peripheral to drive external memories"

Hope that helps.

 

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