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KL02 Crystal Oscillator

Question asked by Thomas Dowad on Oct 11, 2013
Latest reply on Oct 16, 2013 by Hui_Ma



I'm wanting to use the MKL02Z32VFK4


I've just come across the part in the KL02 docs where they tell you it only operates with a 32KHz crystal. That was quite a surprise. I've just done a project with a K20, so I was expecting very much the same. I have not worked out the secret for finding details, given that the documentation is now designed to be somewhat device-independent. I can't seem to find what should be simple answers.


I am wondering about the repercussions. I presume this frequency can be multiplied up? What is the maximum crystal-controlled operating frequency? Is there a code example someone could provide?


I presume it is still possible to use an external oscillator to feed in a higher frequency?


What are the pros and cons of using a low-frequency (kHz) crystal rather than a MHz crystal?


Might I be better off using a different KL MCU, if I want to run that MCU at max clock rate, with a crystal-controlled oscillator?