I've thought about this for adding a user-configuration section to an  
existing product, which didn't have enough extra code space in it...

My thought was that since this would expectedly be used on a "handful"  
of times, I could have the extra code in external memory waiting like  
a DLL, then load that into the PIC when needed, temporarily  
overwriting some other code that's not needed during normal operation  
(like some 32-bit math routines).  That math code would also be in  
external memory and re-loaded when the configuration section was  
complete.

I haven't worked out the full details, but then I discovered the  
16F1936, giving me more code space (over the 16F883).

Cheers,
-Neil.


Quoting cllow2020 <cllow2020@gmail.com>:

> need  help,
> does anyone know how to increase pic flash memory size by using external
> eeprom ? is this possible to have extended flash memory?
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