MC3S12RG128 Datasheet, PDF (246/546 Pages) Freescale Semiconductor, Inc – Microcontrollers

Chapter 9 Clocks and Reset Generator (CRGV4) Block Description
Read: anytime
Write: anytime except if PLLSEL = 1
NOTE
Write to this register initializes the lock detector bit and the track detector
bit.
MC3S12RG128 Data Sheet, Rev. 1.05
246
Freescale Semiconductor