Electronic memory and electronic device provided with such a memory
AssigneeEM Microelectronic-Marin SA
InventorVincent Fuentes
Life of this patent
Estimating the term…
Abstract
The electronic memory (2) includes blocks (M1 to MN) associated respectively with protective sequences (P1 to PN) and decision units (D1 to DN) which control access to the memory blocks. The protective sequences include at least two bits. In order to protect the memory blocks against physical actions which could vary the inscribed code, access to a block is closed when the corresponding protective sequence has identical logical states.
Claims6
An electronic memory including at least one block of memory associated with protective means for controlling access to data comprised in said block of memory, wherein said protective means include a protective sequence of at least two bits and a decision unit which closes access to said block of memory when the logic states of the bits of said sequence are identical.
An electronic device fitted with an electronic circuit and a electronic memory including at least one block of memory associated with protective means for controlling access to data comprised in said block, said protective means including a protective sequence of at least two bits, said protective means being programmable, and a decision unit which closes access to said block of memory when the logic states of the bits of said sequence are identical, and with an electronic circuit being arranged to allow an authorised user or a manufacturer to programme the progammable protective sequence, this operation being protected by specific protective means.
Dependencies are inferred from the claim text.