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issue about the Clocks Generator

Question asked by xiaochen qiang on Nov 21, 2017
Latest reply on Nov 27, 2017 by Daniel Martynek

I am using the CPU MC9S12XEP100,and using CMOS Compatible External Oscillator,

Question 1:the  Lock bit of the CRGFLG Register can not change to 1,it is always 0,why?the oscillator Circuit and scope as below:

the same program in Many other CPU can change to 1 and work normaly,but individual CPU can not change to 1,why?

Question 2: The CPU can not download the program after change the Oscillator Circuit,why?the changed Circuit and scope as below: