The FSET resistor missing or invalid for both BOOST_FSET and PWM_FSET is detected if any one of them is not assembled or not a valid value as requested during the initialization. LP886XX-Q1 defaults the switching frequency of boost to 400 kHz if BOOST_FSET resistor is missing or invalid, or PWM dimming frequency to 305 Hz if PWM_FSET resistor is missing or invalid. The FSET_STATUS fault bit is set in the BOOST_FAULT_STATUS register. The FSET resistor missing or invalid fault is not monitored after initialization, so that the LP886XX-Q1 device operates at the boost switching frequency and the PWM dimming frequency determined during initialization even though the FSET resistor is missing or invalid after initialization.