This is just a thought. With my Atmega8 i always run out of GPIOs or EXT-INTs or TIMERS. Can I combine two MCUs on the same CRYSTAL to be in sync.
1. What is Daisy Chain?
2. What mechanism is used to communicate between the two?
3. Do the work in Master-Master mode or Master slave?
What you think, are people doing such things already?
PS: I searched the forum but didn't find answers to my questions above, thus a post.