I'm going to play around with USB with my 2313. I'm looking at this circuit, and it needs a 12MHz crystal, but I have never worked with crystals before, and I need help finding the value of the load capacitors. I have looked around the internet but have not found a good tutorial that explains this thoroughly and I have a few questions:
The schematic from the website states that the load capacitors are 27pF, but I heard that all crystals are different and may even need adjusting. I am planning on buying this crystal, and it says that the impedance is 32pF and the shunt capacitance is 7pF. What do these values mean, and how do I find the value of the capacitors I should be using?