Abstract:
The invention relates to a method of protecting data in a semiconductor electronic memory comprising a memory matrix (2) and respective matrix address decoding (3) and predecoding (4) blocks. The method consists of using a protected memory portion (5) within said matrix (2) and respective dedicated decoding portions (6,7) for storing, into the protected portion (5), a protection code (CP) external to the address area of the matrix (2). The protection code (CP) can only be written and/or read through a command interpreter (8).