Hi TakenoriSato,
A few notes,
. For DK, what’s the main purpose of using it in your product? Keep in mind, once ODM Production Bit is burned, all the fuses are not readable, including DK. Reserved ODM fuse is another option to consider.
. The reason why the error message from script is due to SSK calculation will be from DK and SBK.
. The document you referred to is correct. So is the secure boot package. Sorry for the confusion. Nano is using TX1 so the fuses are mostly the same. We will make the document clear on Nano product.
. Other than that, could you point out what discrepancies you were referring to? We will make sure it’s clear and accurate. Thanks