发明名称 Semiconductor memory with access protection scheme
摘要 A memory, particularly but not limitatively a flash memory, comprises at least one data storage area comprising a plurality of data storage locations, and an access circuitry 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.
申请公布号 US7249231(B2) 申请公布日期 2007.07.24
申请号 US20040781974 申请日期 2004.02.18
申请人 STMICROELECTRONICS S.R.L. 发明人 BABUDRI IRENE;GHEZZI STEFANO;GIANNINI GIUSEPPE;DELUCA RUGGERO
分类号 G06F12/00;G06F12/14 主分类号 G06F12/00
代理机构 代理人
主权项
地址