Hi @temmka ,
Thanks for your interest in NXP MIMXRT series!
For your needs, I encourage you to try the flexspi_nor polling project in the SDK first.
In this project, flexspi will send data and operate the external Nor flash connected with FLEXSPI. Some simple flash command will be executed, such as Write Enable, Erase sector, Program page.
Example will first erase the sector and program a page into the flash, at last check if the data in flash is correct.
Best regards,
Gavin