Calibrating a high-speed clock signal generated using a processor internal to the electronic authentication device without using a crystal oscillator

摘要

A method is used in calibrating an internal clock generator. An electronic device is instructed to output a high-speed clock signal which is communicated to an external calibration system. The high-speed clock signal is measured using measurement equipment associated with the external calibration system. One or more calibration values based on the measured clock signal value are calculated. The calculated calibration values are communicated to the electronic device. The electronic device is instructed to generate a calibrated clock signal by applying the one or more calibration values to an internally generated clock signal.