Following the code snipet in S12XE IPLL Calculator, Rev. 0 as soon as I set CPMUSYNR to suggestion in table 7.22 of MCS12P128RM1 for external 4MHz crystal, my BDM running P&E ICD12Z runs away.
Dispite its complication the S12CPMU should add exceptional security to a MPU weekest link, its clock.
Fast
