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Sakthi_IND
Associate III
May 19, 2026
Question

external memory selection for STM32H745 ?

  • May 19, 2026
  • 2 replies
  • 107 views


Hi Team,

I am working on board design using STM32H745 (LQFP176 package), and I would like to confirm the correct external memory selection for my smart kitchen application.

Application details:
- MCU: STM32H745 (dual core)
- Package: LQFP176
- USB OTG FS used as HOST to interface a USB camera
- Camera usage: Snapshot (JPEG only, no continuous video streaming)
- Current: 2MP
- Future plan: up to 5MP snapshot
- Additional peripherals:
- I2S (audio codec interface)
- 4× I2C buses
- UART / RS485
- 2× SPI 

For external memory, can I use QSPI PSRAM (APS6404L 8MB), or should I use SDRAM via FMC?


 Please advise which memory type is recommended.  Any guidance or recommended reference designs would be helpful.

 

Thanks
Sathiya

 

2 replies

KDJEM.1
KDJEM.1
Technical Moderator
May 19, 2026

Hello @Sakthi_IND;

 

To check if the memory is supported with QUADSPI interface, I recommend you to look at Overall FAQs for QUADSPI/OCTOSPI/HSPI/XSPI - STMicroelectronics Community precisely "1.1 How to check whether a device is supported" 

 

Also you can find some example in this article some examples of memories used in ST official boards for STM32.

For hardware recommendations, I advise you to refer 6L2S_Outjob schematic and Getting started with STM32H74xI/G and STM32H75xI/G MCU hardware development - Application note

 

Thank you.

Kaouthar

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mƎALLEm
mƎALLEm
Technical Moderator
May 19, 2026

Hello @Sakthi_IND ,

Could you please clarify what relation between the title "Smart kitchen" and the content of your post?

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