Method and system for updating a stored data value in a non-volatile memory

摘要

A method of updating a stored data value in a non-volatile memory is disclosed. The method comprises the steps of: (a) reading the stored data value from the non-volatile memory; (b) reading a stored differential value from a volatile memory; (c) receiving an updated data value; (d) calculating a calculated differential value from the difference between the updated data value and the sum of the stored data value and the stored differential value; (e) comparing the calculated differential value with a threshold differential value; and (f) writing the updated data value to the non-volatile memory if the calculated differential value exceeds the threshold differential value.