38.5.18 Battery Voltage Measurement

The battery voltage is connected to one input of the ADC to perform voltage measurement. To obtain an accurate measurement under conditions that are close to real-life, an internal resistive load is automatically attached to the battery voltage output when the channel is selected for conversion.

When VBAT is selected for measurement, the conversion result is 0.6 x VBAT.

Two resistive load values can be selected by configuring ADC_ACR.ZBAT.

For information on the ADC channel to which VBAT is connected, see the figure Block Diagram.

Refer to the section “Electrical Characteristics” for the resistive load value.