Abstract: A method is described for backing up data stored in a portion of a volatile memory. The method includes allocating, in a Flash memory, two memory zones with equal size alternately working as active memory zone and backup memory zone, where each memory zone has a basic data region, a header region and an update data region. A size of the basic data region is equal to a size of the portion of the volatile memory, when switching between the two memory zones for working as active memory zone. A copy of the data is stored in the portion of the volatile memory into the basic data region of the active memory zone and storing integrity data for the data stored in the basic data region in the header region and if there is a change to data in the portion of the volatile memory, storing the change in the update data region of the active memory zone.