can N+2's firmware runs on a 144 pins STM32F405 chip without any code changes?

i would like to use a 144 pins chip instead the 64 pins one,because there is not enough IO i can use,and i dont want to extend the io with 74 series chips..so can N+2's firmware runs on a 144 pins STM32F405 chip without any code changes?(everything is same as the N+2,except the CPU,but the cpu is still the STM32405 series,just 144 pins)

i think so, yes. the crystal has to be the same frequenzy.

ok,thankyou NooM