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Strange waveform measurement of Reset pin

Question asked by sun man kim on Dec 15, 2014
Latest reply on Dec 18, 2014 by sun man kim

I was making a sample board using the MK64FN1M0VLQ12

 

Apply the power and confirmed the clock and reset.

 

But this strange wave was measured at reset pin. like as below,

 

My sample board have a 10K  ohm pull up resistor.


Regardless of the existence of the pull-up resistor, this waveform is


always measured, Like the attached picture.


It seems like a reset pin directly drives High-Low as the output pin.


So I am the SWD debugging using the J-Link Tool Fail to proceed.


Is there a way to fix this problem?

IMG_20141213_191342.jpg

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