STM32U5G9J-DK2

[Riscy]

I struggled with the difference between STM32U5G9J-DK2 and STM32U5G9J-DK1. The STM32U5G9J-DK2 link to the STM website is not working or is missing. It seems to me the STM32U5G9J-DK2 is a newer, cheaper variant, but what is the difference with DK1? I guess the STM32U5A9J-DK has no audio and is an older model. Does CubeMX for STM32U5G9J-DK2 include Azure ThreadX/FileX/USBX just like Nucleo STM32U5A5. 

The 2nd question is, is there a useful daughterboard that has an SD card for the Nucleo STM32U5A5?

Thanks

[Mike_ST]

Hello,

The STM32U5G9J-DK1 and the STM32U5G9J-DK2 are completly different boards, the STM32U5G9J-DK1 is the same design as the STM32U5A9J-DK (the one with the round screen), the STM32U5G9J-DK2 is another design with a rectangular screen (you have a pic in the STM32cubeIDE). The product page, which I guess is where your link is pointing to, should open soon (end january?).

For the Azure projects, please check on github :

STM32U5 Github 

or on the STM32U5 software package page:

STM32U5 package 

[Mike_ST]

>> The 2nd question is, is there a useful daughterboard that has an SD card for the Nucleo STM32U5A5?

I personnaly don't know other solution than this kind of module:

SD module 

[Riscy]

I placed an order for DK2 from Digikey (158 ex-stocks now), and I found a picture in STM32CubeIDE (thanks), but no initial documentation kits; since it is new, I accept I would have to wait for it. It would be helpful to have a schematic. And BOM so I can experiment with memory access via Azure FileX while waiting for the actual documentation kit to be released. Since DK2 has already been released, could I have the schematic file kit? 

In case the schematic is not available, then I was wondering if the DK2 memory circuit is the same as DK1.

[Riscy]

Thanks, I think I have one lying around......

[Mike_ST]

DK2 has only an OctoSPI flash mem (MX66LM1G45GXDI00).

No external RAM.

Schematic should be avaible when the product page will open.

[ACapo.1]

Shame there is no PSRAM on the DK2, a bit limiting!

[Riscy]

Acapo.1

Interestingly, I have worked on a few STM32 graphic cards for Automotive apps (mostly debugging), and most have external SRAM and FLASH (4-2 year old design). I wondered what the role of external SRAM actually do and what the consequence of not having external SRAM in the context of graphic use, but MCU does have a large SRAM bank build in but not a large as external SRAM. This explains the lower cost than DK1. 

I'm learning in this area. 

[Alex - APMemory]

fyi, if more PRAM is critical,  for lab evaluation, you may have a way to replace on the BGA24 footprint the OPI NOR by an OPI RAM (like APS25608N-OBR-BD/APS51208N-OBR-BD), but this would be only Octal, not Hexa PSRAM.

STM32U5A9J-DK/DK1 includes OPI/HPI PSRAM (APS512XXN-OBR-BG) on board

Regards

Alex

[Riscy24]

Thank for the reminder, I had lot of misadventure with U5 due major issue with HAL library related to USB-C interface. The USB-C power management has closed source code which mad impossible to fix bug where USB-C is not working. I gave up and move on to IMX series from NXP. I still have this board and will try fine time if try USB-C again. It was a major dissappointment and it did impacted management in the department for future STM32 design. I never rely on demo code for professional work, and it need to be clear if there closed source or private code exist in the documentation so we're better informed.