After the power supplies are turned on, the ADC remains in reset until DVDD, IOVDD, and the analog power supply (AVDD – AVSS) voltage exceed the respective power-on reset (POR) voltage thresholds. If a POR event has occurred, the FL_POR flag (bit 7 of the STATUS byte) is set. This flag indicates that a POR event has occurred and has not been cleared. This flag is cleared with a user register write to set the bit to 0. The power-on reset is described further in the Power-On Reset section.