A lock loop circuit (216) includes a precharge circuit (304), an oscillator circuit (306), and a calibration circuit (309). The calibration circuit includes at least one register (362). The precharge circuit provides a precharge signal (347). The oscillator circuit provides an output frequency signal (228) in response to a steering signal (334) that is based on the precharge signal. The calibration circuit, prior to the lock loop circuit entering a disabled mode of operation, determines a calibration value (368) for the precharge circuit based on the precharge signal and the steering signal. The calibration circuit stores the calibration value as a digital calibration value (370) in the register.