Hi,
We are reading values from the AIO_0 pin. Is there any way to disable the pull-down resistor of the Analog pins? Looking for something similar to the PIO PioSetMode() function.
The purpose is to monitor voltage levels of our battery pack.
Thanks,
Mike
Opinions expressed in the content posted here are the personal opinions of the original authors, and do not necessarily reflect those of Qualcomm Incorporated or its subsidiaries (“Qualcomm”). The content is provided for informational purposes only and is not meant to be an endorsement or representation by Qualcomm or any other party. This site may also provide links or references to non-Qualcomm sites and resources. Qualcomm makes no representations, warranties, or other commitments whatsoever about any non-Qualcomm sites or third-party resources that may be referenced, accessible from, or linked to this site.
I am not sure there is a pull-down resistor?
Did you get a bad reading?
Agreed, the data sheet doesn't mention any resistors on the AIO pins and it would be odd for them to be active on an analog pin.
But yes, we are getting unexpected readings.
We have a voltage divider with two 1Mohm resistors, which should give us a 2:1 divider, but instead, we're seeing a 2.75 : 1 divider, as if there's a pull-down resistor in parallel with the resistor to ground.
Are there any other configuration options that could possibly interfere or relate to the AIO module?
Thanks
Please call my Skype nissim.test
You probably presume that the ADC has a range of 3V when it is ~1.3V max input.