Thank you very much Darrel.
I also went through the hardware, and found nothing wrong.
10Mhz xtall, 15pf caps, HSPLL (DEF. OSC 40) does not work.
20Mhz xtall, 15pf caps, HS_OSC (DEF. OSC 20) works.
Testing it with 40Mhz using a test code (without MIBAM) is ok.
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