I am going to be working with the Freescale MC9S12XE processor and trying to figure out the oscillator configuration. They offer the following options:
Loop Controlled Pierce Oscillator
Full Swing Pierce Oscillator
They recommend the Loop Controlled for most situations but suggest the Full Swing for high frequency crystal operation.
The documentation states the following about the general Pierce Oscillator and noise immunity:
The XOSC will contain circuitry to dynamically control current gain in the output amplitude. This ensures a signal with low harmonic distortion, low power and good noise immunity.
• High noise immunity due to input hysteresis
But it does not say if one configuration offers more noise immunity over the other.
My question is, would one of these configurations offer more noise immunity than the other? Why or why not?