Thank you for contacting Cypress.
I think you must be talking about the following table in S25FL1-K datasheet.
This table is comparison to S25FL-P which has the MirrorBit technology and no uniform sector Architecture. The FL-P has 16 4KB parameter sector at the top or bottom of the array. The FL1-K is Floating gate technology and has uniform 4KB/32KB/64KB sectors, therefore a N/A for having parameter sectors.
For example, S25FL132KOXNFV010 is divided into 4kB x 1024.
4kB sectors are used as both parameter sector and general memory sector.
At this case, Cypress describe parameter sector size of S25FL132KOXNFV010 is N/A.
Is my understanding correct?
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Yes, you are right.