ESP-PSRAM64H and STM32H743 QSPI mode

[Dat Tran]

Hi,

Is there any one success with ESP-PSRAM64H in memory mapped mode?

We are able to read ID (0x9F) in spi mode. But when we read/write, it return 0xFF. We don't see EnableWrite command, does this chip has EnableWrite command?

We also wanted to use this memory as RAM so we can read and write from a pointer.

But how we send Read and Write command Id at the same time when set register at memory mapped mode?

Many thanks

[Tesla DeLorean]

Related topics, easier for me to find later

https://community.st.com/s/question/0D53W00000iCq1hSAC/stm32h723-problem-with-serial-ram-in-memory-mapped-mode

[APiro.1]

Tesla DeLorean,

Thanks for sharing of the link! It seem that we need to try the APS6408L-3OBM-BA to see if it works. It may wait until next version of our prototype board to add it on, because I couldn't find any evaluation board of this BGA.

/Artin

[Alex - APMemory]

Hi,

I'm not sure which board you are looking at. For reference, we did test APS6408L-3OBM-BA  on MB1331 for STM32H7A/B, by replacing the NOR to IoT RAM using the OCTOSPI2 slot. Demo code attached as well.

Thanks

Alex

[Alex - APMemory]

Hi Artin,

Please see APS6408L-3OBM-BA code example attached, It was used on MB1331 STM32H7A/B board, replacing the NOR by our RAM on the OCTOSPI2 slot

Hope this help

Alex

[APiro.1]

Hello Alex,

Thanks for description and the sample code! I really appreciate it. We are going to produce a new version of prototype board for one of our new products and I will add APS6408L-3OBM-BA on it to test.

What I meant by evaluation board was that if APM had small PCBs with APS6408L-3OBM-BA like in your picture. It would help people to verify the memory with their designs and APM to sell more memory.

/Artin