Please provide IBIS model for the part S25FL256SAGMFIR01 also Hspice model if it is available for SI analysis purpose.
Thank you for contacting Cypress Semiconductor.
You can download the IBIS model for S25FL256S device from the following link - https://www.cypress.com/ibis/s25fl256s-ibis
Please go through the ibis_readme_s25fl256s.txt file to choose the correct model according to your package.
Please let me know if you have any further queries.