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VREF_OUT as reference for ADC16 on 32 pin KL17

Question asked by Nick Dolling on Dec 14, 2015
Latest reply on Nov 21, 2017 by JeffLynne

Hi All,

 

I would like to use the internal 1.2V reference as the refernece for the ADC. Both the datasheet and reference manual suggest this should be possible, however it's not obvious how to configure it.

 

The only options for reference sources in the ADC config are Vrefh orValth. For Valth it says refer to the chip configuration information (which I assume is the datasheet), but there is nothing there either.

 

If I select the ALR reference, I get results as though the reference voltage is still 3.3V.

 

Any sugegstions?

 

Thanks,

 

Nick

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