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K02 DAC output logic level during Power-On Reset (POR)

Question asked by marie lu on Sep 29, 2015
Latest reply on Oct 5, 2015 by marie lu

Dear Sir or Madam,

I'm using the K02FN64VFM10, and would like to use the DAC port to generate a slope signal. Processor Expert is used to initialize the DAC module.

During the power-on process, the DAC output stays at 3 V for about 250 ms, and then drops to 0 V and start to generate the slope signal.

As in the figure below, the yellow line is the DAC output, which stays high during the first 250 ms. The green line is the 3.3 V VDD signal (Power supply) and the pink line is a GPIO output, which generate a high level output immediately after the automatic initialization by Processor Expert.@@

I'm wondering if the DAC output logic level could be programmed to 0 V during reset at the very beginning.

IMG_1212.JPG

 

Thank you in advance for any kind of help!

Marie

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