This application note describes how to use the ADC portion of the ASP module to build a battery voltage detection circuit with an accuracy of approximately +/- 20mV at the 3V - 4.2V range.
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MC9328MX1 Battery Voltage Detection Using the i.MX1
This application note describes how to use the ADC portion of the ASP module to build a battery voltage detection circuit with an accuracy of approximately +/- 20mV at the 3V - 4.2V range.