We are currently working on a project using the STM32H750IBT6 microcontroller interfaced with a single-bank Quad SPI NOR Flash (MT25QL512ABB) on our custom board. The QSPI interface is operational.
However, we are facing an issue with the external loader. While the same external loader setup works correctly with the STM32H750 development board using the same two MT25QL512ABB Flash memories, it fails to function on our custom board.
Development board QSPI schematic:
Our custom board QSPI schematic:
For reference, we are used the external loader implementation for development board from the following link:
https://controllerstech.com/w25q-flash-series-part-8-quadspi-external-loader/
We request your support in:
Verifying if our schematic connections for the QSPI interface may be contributing to the issue.
Identifying any possible hardware or configuration-related causes for the external loader failure.
Hello @Geethat and welcome to the community;
Have you tested the MT25L01G_STM32H750B-DISCO external loader in STM32CubeProgrammer with your customer board?
I think, you can use the external loader "MT25TL01G_STM32H750B-DISCO" [support memory Size = 128M] for your QSPI memory MT25QL512ABB8ESF-0SIT [memory Size = 64B] because the size of your memory is less than the external loader supported by STM32CubeProgrammer.
For hardware checking, I recommend you to refer to AN4938 precisely section "9.4.3 Quad serial parallel interface (QUADSPI)"
I hope this help you.
Thank you.
Kaouthar
Yes, we have tested the external loader MT25TL01G_STM32H750B-DISCO in STM32CubeProgrammer with our custom board, but it did not work.
Could you please advise on the next steps? and also verify our custom board schematic whether it is correct or not.
The errors we have received are as follows:
