Can any one please explain the ways in which atmega chip can be clocked for example difference between ceramic resonator and normal crystal oscillator we found on arudino(16Mhz), external clock etc. PLEASE SEE THE ATTACHMENTS WHERE I INCLUDED SEVERAL TABLES THAT CONFUSES ME FROM AVR DATASHEET..
It's really confusing and even on internet no correct and straight forward simple explanation.
Consider I want to use 20Mhz crystal oscillator (normal one as like arudino's 16Mhz) to clock my avr. What fuse bit should I select. I attached a screenshot of a table from datasheet, please any explain what all those low, high medium power means plus do they really mean using normal CRYSTAL OSCILLATOR?
My doubts topic are listed below:
1.What is really this ceramic resonator means?? Difference between it and a normal crystal oscillator we use??
2. Low power crystal oscillator and Full swing crystal oscillator? Do I really choose Full swing crystal oscillator since I need a clock of 20Mhz??
3. Also explain Ceramic resonator_fast rising power, Ceramic resonator_slowly rising power all this thins means. I will include the screen shot of each area which is to be explained?