I know this has been discussed many times before, but this time from a different perspective.
I think I have never used an AVR with a ceramic resonator, only with a crystal.
Now I would really need the PCB real estate for something else, so I am considering a resonator, as they are smaller and require less external components (load caps are built-in to some resonators, but not all).
So my question is that what problems have you encountered with ceramic resonators, if any? Should I just expet it to work and forget about it? Any startup problems? Any suggestions about setting fuses differently or including series or feedback resistors in the circuit?
I am also interested in what way do I have to take into account serial port communication knowing that resonators are only 1%-2% accurate while crystals are 100ppm-200ppm in non-tuned circuits? Should I include delays between bytes, or between some amount of bytes, if transmitting bursts of continuous data as fast as possible (interrupts or not, don't know yet. Baud rate 115200 maximum.) I only know that 2% is good enough for a single byte, but is it good for data packets?