The device monitors V_SUP for two low voltage thresholds, UV_SUP and V_nPOR. When V_SUP drops below UV_SUPF and is above V_nPORF, the device is in an under-voltage power state. Once V_SUP ramps above UV_SUPR, the device enters restart mode and turns on the V_CC LDO, see Restart Mode. When V_SUP drops below V_nPORF, the device goes into a power off state. Once V_SUP ramps above V_nPORR, the device prepares the digital core to wake up. The device waits for V_SUP to rise above UV_SUPR and then turns on the V_CC LDO. Once V_SUP and V_CC are above their under-voltage levels, the device enters Init mode, see Init Mode. The described under-voltage events are also considered brown out events and more information can be found at Device Brownout information.