Method and apparatus for the realization of a failsafe time function

摘要

A method for enabling an oscillating crystal available in a system to be used to generate a software-realized time function, and an apparatus for implementing the method, without requiring additional hardware components, wherein a periodic interrupt signal is generated by the system-internal real-time clock, a table entry with a reference to a routine in an intra-system table is accessed upon receipt of the periodic interrupt signal and a counter is formed by the routine.