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FRDM-K20D50M clock system

Question asked by Daniel Egener on Mar 3, 2015
Latest reply on Mar 4, 2015 by David Diaz Marin


i am new in ARMs, new in Kinetis and new in Processor Expert.


I try to setup the clock system of this Evaluation system. To test the setup i want to toggle a pin in the main function. But i cannot see a clean toggle signal. An other idea was to toggle the pin in an timer interrupt. If i choose Period of 100 Khz, i can see a clean toggle signal on the oscilloscope. If i change the period to 50 Khz or 1 Mhz i cannot see a clean signal.

Does anybody an idea what's going wrong?

Thanks in advance!