Patent ID: 8151072
Filing Date: 2012-04-03
Classification: G06F

Abstract:
1. An electronic device including: (i) a logic unit; (ii) a non volatile memory, wherein said non volatile memory includes a plurality of distinct words whose access can be individually locked; (iii) an electromagnetic communication antenna; and (iv) a protection register of said plurality of words, wherein the protection register is formed of two protection words each having a plurality of lock bits respectively corresponding to the plurality of words, wherein the two protection words are alternately active and inactive during a successive locking of the words of said plurality of words, wherein the active protection word defines the state of said protection register, wherein any word is locked if the corresponding lock bit of said protection register is in a first logic state whereas access thereto is free if said corresponding lock bit is in a second logic state, wherein each new locking of one word of said plurality of words generates writing of a resulting new protection word in the inactive protection word which then becomes the active protection word of said protection register.