I'm under the impression that the 16MHz crystal oscillator needs two 22pF capacitors, like this one I'm using:http://www.sparkfun.com/commerce/product_info.php?products_id=536
Today I found out their datasheet (in comments) says 20pF. I'm a bit confused. I thought all parallel(right?) HC49/US crystals at 16MHz need 22pF. Can someone clarify this?
By the way, I did some crude testing and my standalone arduino with this crystal and 22pF caps and timing seems good, not off by like 10% or something. Thanks.