ADC Conversion Result

After the conversion is complete (ADCSRA.ADIF is set), the conversion result can be found in the ADC Data Registers (ADCL).

For single ended conversion, the result is

ADCL=VIN256VCC

where VIN is the voltage on the selected input pin, and VCC the selected voltage reference (see also descriptions of ADMUX.MUX). 0x00 represents analog ground, and 0xFF represents the selected reference voltage minus one LSB.