Data protecting method, memory control circuit unit and memory storage device

Abstract

A data protecting method for a rewritable non-volatile memory module is provided. The method includes assigning a plurality of physical pages into a plurality of encoding groups to group a first physical page to a first encoding group and group a second physical page to a second encoding group, where each of the physical pages stores user data and a parity code corresponding to the user data, the first physical page is composed of memory cells of a first word line, and the second physical page is composed of memory cells of a second word line adjacent to the first word line. The method also includes respectively encoding the user data in the physical pages of the encoding groups for generating a plurality of group parity codes respectively corresponding to the encoding groups.