hi,

what is difference between dsPIC33FJ256GP710A and dsPIC33FJ256MC710A? in terms of functionality.
if i use dsPIC33FJ256MC710A instead dsPIC33FJ256GP710A then will it work?

what changes i will have to do to use dsPIC33FJ256MC710A instead of dsPIC33FJ256GP710A?

 

Look at the last pages in the datasheet to decode the difference. I'd do it for you, but retirement has made me too lazy.

Oh, alright.

http://ww1.microchip.com/downloads/en/devicedoc/70165a.pdf p.415

GP710 -- general purpose family with 100 pins
MC710 -- motor control family with 100 pins

Your application will determine if they are interchangeable or not.