1. Method of managing access to a non-volatile memory, wherein said non-volatile memory results from the association of a non-volatile memory of a first type comprising characteristics of high capacity and coarse granularity, with a non-volatile memory of a second type comprising characteristics of low capacity and fine granularity, such that said non-volatile memory resulting from said association has the characteristics of capacity of said non-volatile memory of the first type and the characteristics of granularity of said non-volatile memory of the second type.