See, e.g., Ex. CC at 4 [‘336 File History, 7/7/97 Amendment] (distinguishing Magar prior art reference that disclosed an external crystal across plus and minus pins connected to on-chip clock generator).
I don't recall seeing the name Magar before. They claim Magar's art is prior to the 336. I can't look this up now. Wolfpackvolt can you help?