STM32H750 + QuadSPI PSRAM chip: would it work?

[sminder]

I wonder if STM32H750 will work with QuadSPI PSRAM chip (for example ESP-PSRAM64H) and map it into the memory natively? I've read in the datasheet that MCU supports Flash chips via QuadSPI, but what about PSRAM?

[Alex - APMemory]

Hi,

The QuadSPI memory Controller of the STM32H750 is a NOR memory Controller and so it doesn't support Memory Mapped Write function (other functions are supported and might run Quad PSRAM). If you need full functionnal external RAM for this specific MCU version, you could use use ADMUX PSRAM (for example APS12816G…) or SDRAM (for example A3V64S40GTP) using the FMC controller rather than the Quad memory controller.

fyi, other version of STM32H7 (for example H7A3/B3/B0 or H72x/73x) does support QSPI or OPI PSRAM with full functionality

Alex 

By the way, the ESP-PSRAM64H is only supporting ESP32 MCU, an equivalent Quad RAM PN to use is APS6404L-3SQR-SN (lower density 16Mb APS1606M-3SQR also available)