UNO R4: RENESAS On chip Data Flash access process FCB

Hi,

Where could I find the description of how to access the On chip Data Flash for writing, clearing, etc., at chip hardware level.

Information about the Flash Control Block (FCB), in the Renesas RA4M1 Group User’s Manual is quite (totally) limited.

I am a hobbyist, so I like to "mettre les mains dans le cambouis".

Thanks a lot