Hello Pratik,
the requested documents and other useful FS26 documents are available in the FS26 product page, under the Secure section. Please note, to be able to download the confidential documents, your company need to have a valid NDA (Non Disclosure Agreement) with NXP and you need to be registered on the nxp.com page.
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The Hardware design guideline is in the AN12995.
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With Best Regards,
Jozef