Method for storing and/or changing state-information of a memory as well as integrated circuit and data carrier
AssigneeKoninklijke Philips Electronics N.V.
InventorFranz Amtmann
Life of this patent
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Abstract
In a method for storing and/or changing state information in a memory (2) containing a plurality of memory cells (3), wherein the memory cells (3) assume an irreversible memory state as a result of a programming step, wherein the state information is represented by a number and/or position of memory cells (3) that are in an irreversible memory state or are programmed, the state information (S3, S13) is determined by checking the memory state of the memory, and then, after selecting (S4, S14) an unprogrammed memory cell (3) the selected memory cell is programmed during or for changing the state information (2).
Claims12
A method for storing and/or changing a state information item of a memory containing a plurality of memory cells, wherein the memory cells assume an irreversible memory state as a result of a programming step, wherein the state information is represented by a number and/or position of memory cells existing or programmed in an irreversible memory state, said method comprising the steps presented in the following;
- determining the state information by checking the memory state of the memory and selecting an unprogrammed memory cell and programming the selected memory cell during and/or for changing the state information of the memory.
An integrated circuit for storing and/or changing state information of a memory containing a plurality of memory cells wherein the memory cells assume an irreversible memory state as a result of a programming step, said integrated circuit containing a programming unit for programming the memory cells and a feed-logic circuit said feed-logic circuit being provided for picking up and emitting data for programming and determining the state information of memory.
Dependencies are inferred from the claim text.