SLUSDQ4 April 2019 BQ79606A-Q1
GPIO1 - GPIO6 are available to measure using the auxiliary ADC. To use the GPIOn as ADC input, first configure the GPIOn as an input using the corresponding GPIO*_CONF register. Enable the ADC conversion on the GPIOn inputs using the AUX_ADC_CTRL1 register. Note If GPIO* is weakly pulled-up (to VIO) and then a GPIO* AUX_ADC conversion is performed, the ADC data will correspond to 96% of VIO. This is due to the resistor divider in the ADCMUX circuit. See AUX GPIO Input Measurement for more details.