Chapter 6 Pierce Oscillator (S12XOSCLCPV1)
MC9S12XDP512 Data Sheet, Rev. 2.11
Freescale Semiconductor 315
6.4.3 Wait Mode Operation
During wait mode, XOSC is not impacted.
6.4.4 Stop Mode Operation
XOSC is placed in a static state when the part is in stop mode except when pseudo-stop mode is enabled.
During pseudo-stop mode, XOSC is not impacted.