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According to MEC1322 datasheet, ADC VREF is 3V. With the voltage divider on Kunimitsu, R1=180K and R2=20K, so full ADC is equal to 30V if ADC VREF is 3V. BUG=none BRANCH=none TEST=Checked value returned by adc console cmd. 20xxx mV is returned by Zinger. 14xxx mV is returned by Apple charger. Change-Id: I155ce03e3c840740c1dc3a985a1d5cfcf3b40c30 Signed-off-by: Kevin K Wong <kevin.k.wong@intel.com> Reviewed-on: https://chromium-review.googlesource.com/304192 Reviewed-by: Shawn N <shawnn@chromium.org>
For an overview of the Embedded Controller firmware, refer to http://www.chromium.org/chromium-os/2014-firmware-summit
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