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Problem on LPC54608Expresso, PLL's will not lock

Question asked by Carsten Groen on Dec 23, 2016
Latest reply on Dec 26, 2016 by Carsten Groen


I have been going thru the various test programs for the LPC54608Expresso board and I'm having some problems with the "periph_clkout" sample. I can get the CLKOUT working fine, but only if I disable the PLL code (both system and audio).

If any of the Chip_Clock_SetAudioPLLFreq() or Chip_Clock_SetupSystemPLLPrec() is called (the two lines with the breakpoints in the attached screendump, the code will hang forever waiting for PLL lock (both Audio and System)

Am I doing something wrong, or are any of you able to reproduce this ?