公开(公告)号：EP1450261A1

公开(公告)日：2004-08-25

申请号：EP03425093.6

申请日：2003-02-18

Applicant: STMicroelectronics S.r.l.

Inventor： Babudri, Irene ,  Ghezzi, Stefano ,  Giannini, Giuseppe ,  De Luca, Ruggero

IPC: G06F12/14

CPC classification number: G06F12/1425

Abstract: A memory, particularly but not limitatively a Flash memory, comprises at least one data storage area (SEC1-SEC4) comprising a plurality of data storage locations (ML1-MLm), and an access circuitry (105,110) for accessing the data storage locations for either retrieving or altering a data content thereof, depending for example on a memory user request. The memory includes at least one first user-configurable flag element and a second user-configurable flag element. Both the at least one first and the second flag elements are used by a user to set a protected state of the respective data storage area against alteration of the content of the data storage locations thereof. The protected state defined by setting the first flag element is user-removable, i . e ., it can be removed by request from the user, so as to enable again the alteration of the content of the data storage area. On the contrary, the protected state defined by setting the second flag element is permanent and, once set, it cannot be removed: the data storage area becomes unalterable.

Abstract translation: 存储器，特别是但不限于闪存，包括至少一个包括多个数据存储位置（ML1-MLm）的数据存储区域（SEC1-SEC4）和用于访问数据存储位置的访问电路（105,110） 取决于或更改其数据内容，例如根据存储器用户请求。 存储器包括至少一个第一用户可配置标志元件和第二用户可配置标志元件。 所述至少一个第一和第二标志元素都由用户使用以设置相应数据存储区域的受保护状态以防其数据存储位置的内容的改变。 通过设置第一标志元素定义的受保护状态是用户可移除的，即可以通过来自用户的请求去除它，以便再次允许数据存储区域的内容的改变。 相反，通过设置第二标志元素定义的受保护状态是永久的，一旦设置，就不能被去除：数据存储区域变得不可变。

公开(公告)号：EP0926601A1

公开(公告)日：1999-06-30

申请号：EP97830717.1

申请日：1997-12-24

Applicant: STMicroelectronics S.r.l.

Inventor： Campardo, Giovanni ,  Ghezzi, Stefano ,  Giannini, Giuseppe ,  Torricelli, Piero Enrico

IPC: G06F12/14 ,  G11C8/00 ,  G11C16/06 ,  G07F7/10

CPC classification number: G07F7/1008 ,  G06F12/1433 ,  G06F21/79 ,  G06Q20/341 ,  G06Q20/357 ,  G11C8/20 ,  G11C16/22

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).

Abstract translation: 本发明涉及保护数据在半导体电子存储器包括存储器矩阵的方法（2）和相应的矩阵地址译码（3）和预解码（4）块。 所述基质内使用受保护的存储器部分（5）的方法，besteht（2）以及用于存储，进入外部的地址区中的受保护的部分（5），一个保护码（CP）各自专用的解码部（6,7） 矩阵的（2）。 保护代码（CP）只能通过一个命令解释器（8）被写入和/或读出。