2021-12-14 10:05 PM
2021-12-14 10:16 PM
What do you mean with "extreme noisy environment"?
No chance using a (grounded) case for shielding, EMI-compatible PCB layout, conditioning / filtering of IO signals?
We're making electronics for >20 years now running on 3.3V and less for industrial environments, so it should be possible.
5V would limit your choice so much, it will be hard to find some powerful controller.
2021-12-14 10:46 PM
Noise immunity comes with differential pairs. Usb, dsi.... even below 2v
2021-12-15 01:04 AM
circuit is placed near to a induction coil which is main source of noise.