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In the data sheet for the PCM2902E it states that crystal spec's. for the clock is a 12Mhz / plus and minus 500ppm freq. tolerance clock.
1.) I wanted to know if I can use a tighter freq. tolerance like 50-100ppm ?
also in the data sheet it states to use a 1M ohm resistor across the crystal and two capacitors.
2.) Do the capacitor values needed for the crystal have to match the crystals load capacitance - other words if the crystal has a load capacitance of 20pF then two capacitors of 20pF must be used?
3.) Selecting a crystal does the value of the ESR of the crystal matter , I found two crystals that are 30 and 60 ESR max .
4.) Is the 1M ohm resistor value across the crystal stay the same value regardless of crystal spec's.
