Patent ID: 8224602

Claim:
A method for harmonizing the after-prescaled oscillator frequencies of a plurality of I 2 C Bus slave devices, comprising: estimating a raw operating frequency of each oscillator on an individual I 2 C Bus slave device by counting how many independent local oscillator cycles occur during a measurement window period spanned by a fixed number of serial clock line (SCL) transitions observed in a particular I 2 C Bus common to the plurality of I 2 C Bus slave devices; automatically calculating a prescale factor from a measurement obtained in the step of estimating; and automatically loading said prescale factor into a corresponding programmable prescale divider associated with an oscillator providing said raw operating frequency; wherein, the estimating, calculating, and loading when conducted for a plurality of I 2 C Bus slave devices on said particular I 2 C Bus results in a harmonization of the respective output frequencies of a respective programmable prescale divider.