The OPT4060 device measures light on four independent channels and updates output registers with proportional ADC codes. Updates are based on the mode of operation as described in Modes of Operation. If readout of output registers is performed before a successful completion of a measurement, the previous measurement is what would be read out. Output of the each channel is represented by two parts (i) four bits of EXPONENT_CHx and (ii) 20 bits of MANTISSA_CHx. This arrangement of binary logarithmic full-scale range with linear representation with in a range, helps in covering a large dynamic range of measurements. MANTISSA here represents the linear ADC codes proportional to the measured light within a given full-scale range and the EXPONENT_CHx represents the current-full scale range selected. The selected range can be automatically determined by the auto-range selection logic or manually selected as per Table 8-3.