STM32F446RE

[Muhsin Ali]

Posted on January 20, 2017 at 06:02

Hi Guys,

I am working on a project based on 

STM32F446RE and we need to interface external SDRAM(16bit) with STM32. Can anybody help me with interface of SDRAM with STM32.

Regards,

Muhsin Ali

#stm32f446re #sdram

[Nesrine M_O]

Posted on January 20, 2017 at 11:38

Hi

muhsinali009

,

• I recommend you to have a look to FMC examples under the STM32F4 package to have idea how to configure the FMC controller to access the SDRAM memory: STM32Cube_FW_F4_V1.0\Projects\STM32446E_EVAL\Examples\FMC
• Also have a look to the

  http://www.st.com/content/ccc/resource/technical/document/user_manual/da/0b/72/0b/d3/77/44/df/DM001678pdf/files/DM001678pdf/jcr:content/translations/en.DM001678pdf

  user manual page 51 about SDRAMElectrical schematic.

-Nesrine-

[Muhsin Ali]

Posted on January 23, 2017 at 08:26

Hi

ELMHIRI.Syrine

,

The document you provided was useful, but we are using WLCSP81 package(

http://www.digikey.com/product-detail/en/stmicroelectronics/STM32F446MEY6TR/497-15812-2-ND/5287184

). It seems some of the interfacing pins are not available for this package(ex:- FMC_A0 to FMC_A11). Do we have alternate pins for this or do we need to use UFBGA144(

http://www.digikey.com/product-detail/en/stmicroelectronics/STM32F446ZEH6/497-15814-ND/5287173

) package.

Regards,

Muhsin Ali

[Nesrine M_O]

Posted on January 23, 2017 at 09:59

Hi

Ali.Muhsin

,

FMCAlternate functions are available forUFBGA144 andLQFP144 packages,please refer toSTM32F446xx pin and ball descriptions table in your datasheet for further details.

-Nesrine-

Ifmy suggestanswers your question, please mark it as correct.

[waclawek.jan]

Posted on January 23, 2017 at 11:41

Nesrine,

I went to the

http://www.st.com/en/microcontrollers/stm32f446re.html

and it says

• Flexible external memory controller with up to 16-bit data bus: SRAM,PSRAM,SDRAM/LPSDR SDRAM, Flash NOR/NAND memories

I also opened the datasheet, DocID027107 Rev 6, and in 3.9  Flexible memory controller (FMC) it says:

All devices embed an FMC

JW

[Muhsin Ali]

Posted on January 23, 2017 at 12:02

Hi

Waclawek.Jan

,

In the datasheet page no:-13 it is mentioned that

UFBGA144(

STM32F446Z

) andLQFP144(

STM32F446V)

packages only support FMC, but i dnt know why it mentions all device have embed FMC.

Regards,

Muhsin Ali

[waclawek.jan]

Posted on January 23, 2017 at 12:17

Hi Mushin Ali,

I see that. I meant my comment as a request for documentation and website enhancement.

JW

[Nesrine M_O]

Posted on January 23, 2017 at 12:20

Hi

Waclawek.Jan

,

This documentation issue has been reported internally for review.

Thank you very much for your contribution to the enhancement of our STM32 resources.

-Nesrine-

[Qiyan Li]

Posted on December 04, 2017 at 21:06

Hi

Waclawek.Jan

,

I'm also thinking about connecting the external SDRAM with STM32F446RE. As you said there is no FMC on this board, is there any other way I can connect external SDRAM?