I'm designing a system where I wan't to
store the user's settings in a non-volatile memory.
The philips P89C51RB2 microcontroller has a Flash which is In-system and In-application programmable.
Does this mean that I can use the Flash
to store data without external harware or serial comm. ?

I'm hoping to avoid battery backed-up
NVRAM by using this method.

Please help soon.
Thank you.