METHOD FOR STABILIZING THE CLOCK FREQUENCY OF A MICROCONTROLLER

摘要

The invention relates to a method for stabilizing the clock frequency (f) of a microcontroller associated with a field device in automation engineering, wherein the field device is subjected to different process conditions depending on the usage, and the clock frequency (f) of the microcontroller (μC) is determined for at least two different temperature values (T1, T2,...) and/or for at least two different voltage values (U1, U2,...). On the basis of the determined values, the dependence of the clock frequency (f) of the microcontroller (μC) on the temperature (T) over a predetermined temperature range and/or frequency range and/or the dependence of the clock frequency (f) of the microcontroller (μC) on the voltage (U) over a predetermined voltage range and/or frequency range is determined. The determined values are stored and the influence of the temperature (T) and/or the voltage (U) on the clock frequency (f) of the microcontroller (μC) is/are compensated at least approximately taking the determined temperature dependence and/or the determined voltage dependence into account.