Unable to access external storage 0x90000000 but download successful.

[AMOMO]

The application can be downloaded to external Flash at address 0x90000000. However, during debug startup, address 0x90000000 cannot be accessed, even though there are no errors during XSPI initialization.

Hardware Error:

• Fault PC (Program Counter): 0x2000fec8

• Fault LR (Link Register): 0x38636566

• Bus Fault Address: 0x90000000

Hard Fault Error The flash chip is: MX25UM25645G Set as follows

[Tesla DeLorean · Accepted solution]

LR looks to be ASCII junk, perhaps popped off the stack.

You'll need to look at the generated CODE, and debug it

[AMOMO]

After adjustments, it seems that the internal flash and external flash structures are similar, but I still cannot access the address 0x90000000. Could you provide tutorials or documentation on how boot accesses flash content? Thank you very much.

[AMOMO]

Thank you for your advice. Currently, after enabling the Flash module via the IOC configuration options, I have successfully accessed the address 0x90000000.