Hi,
I am having a problem whten connecting two microcontrollers together. I have a main board with power, and a hotswappable daughter board that takes its power from the first.
When I connect the two boards together (with the main already powered), the main will reset - as if the daughter requires too much current and the main board browns out.
HOWEVER, I have put a scope on the power lines going into the main microcontroller and the positive rail does not seem to drop.
The microcontroller has 100nF caps as bypass caps - I was wondering if I could/should but some larger caps where I connect the daughter board to act as a reservoir of sorts.
Does anyone have an experience dealing with the same issue - and how did they fix it?
Many thanks,
steaky