The g2231 etc certainly are not specced to work from high frequency crystals or oscillators, but in actual use it works: http://forum.43oh.com/topic/594-use-a-

The g2231 etc certainly are not specced to work from high frequency crystals or oscillators, but in actual use it works: http://forum.43oh.com/topic/594-use-a-12mhz-external-square-wave-as-mclk/ http://forum.43oh.com/topic/594-use-a-12mhz-external-square-...