Method and device for updating information elements in a memory

A method for updating information elements in a memory which includes a plurality of memory locations, wherein an initial value D0 has been written at a first location E0 of the memory, E0 being determined by an initial value of a string of indicator bits, the initial value being defined by the parity of the rank of a last bit of the string of indicator bits in a programmed state, the method comprising:

• writing a new value D1 at another location E1 of the memory, E1 being determined by the first blank state bit parity of the rank of a string of logic indicator bits;
• verifying the written value in E1 by comparing the written value in E1 with D1;
• emitting an error code to a processing unit, if, after verifying the written value in E1, the written value in E1 does not match D1;
• erasing the string of indicator bits entirely so that all of the indicator bits are in a blank state and writing the first bit to the programmed state, if, after verifying the written value in E1, i) all the indicator bits are in the programmed state and ii) the written value in E1 matches D1, and writing a first bit of the string of indicator bits in a blank state to the programmed state, so as to make the value written in E1 accessible in a reading mode.

An updating device for updating information elements comprising:

• a memory which includes a plurality of memory locations;
• a string of indicator bits;
• means for writing an initial value D0 at a first location E0 of the memory;
• means for determining the location E0 by an initial value of the string of indicator bits, the initial value being defined by the parity of the rank of a last bit of the string of indicator bits in a programmed state;
• means for writing a new value D1 at another location E1 of the memory, the location E1 being determined by the first blank state bit parity of the rank of a of the string of logic indicator bits;
• means for verifying the written value in E1 by comparing the written value in E1 with D1;
• means for emitting an error code to a processing unit, if, after verifying the written value in E1, the written value in E1 does not match D1;
• means for erasing the string of indicator bits entirely so that all of the indicator bits are in a blank state and writing the first bit to the programmed state, if, after verifying the written value in E1, i) all the indicator bits are in the programmed state and ii) the written value in E1 matches D1, so as to make the value written in E1 accessible in a reading mode;
• and
• an automation designed to activate the different steps of the updating of the memory.

An updating device for updating information elements comprising:

• a memory which includes a plurality of memory locations;
• a string of indicator bits;
• means for writing an initial value D0 at a first location E0 of the memory;
• means for determining E0 by an initial value of the string of indicator bits, the initial value being defined by the parity of the rank of a last bit of the string of indicator bits in a programmed state;
• means for writing a new value D1 at another location E1 of the memory, E1 being determined by the parity of the rank of a of the string of logic indicator bits;
• means for verifying the written value in E1 by comparing the written value in E1 with D1;
• means for emitting an error code to a processing unit, if, after verifying the written value in E1, the written value in E1 does not match D1;
• means for erasing the string of indicator bits entirely so that all of the indicator bits are in a blank state and writing the first bit to the programmed state, if, after verifying the written value in E1, i) all the indicator bits are in the programmed state and ii) the written value in E1 matches D1, so as to make the value written in E1 accessible in a reading mode;
• means for writing a first bit of the string of indicator bits in a blank state to the programmed state if, after verifying the written value in E1 and before erasing, i) the value written in E1 matches D1 and ii) all the indicator bits are not in the programmed state, so as to make the value written in E1 accessible in a reading mode;
• and
• an automation designed to activate the different steps of the updating of the memory.

A method for updating information elements in a memory which includes a plurality of memory locations, wherein an initial value D0 has been written at a first location E0 of the memory, E0 being determined by an initial value of a string of indicator bits, the initial value being defined by the parity of the rank of a last bit of the string of indicator bits in a programmed state, the method comprising:

• writing a new value D1 at another location E1 of the memory, E1 being determined by the parity of rank of a of the string of logic indicator bits;
• verifying the written value in E1 by comparing the written value in E1 with D1;
• emitting an error code to a processing unit, if, after verifying the written value in E1, the written value in E1 does not match D1;
• erasing the string of indicator bits entirely so that all of the indicator bits are in a blank state and writing the first bit to the programmed state, if, after verifying the written value in E1, i) all the indicator bits are in the programmed state and ii) the written value in E1 matches D1, so as to make the value written in E1 accessible in a reading mode;
• and
• writing a first bit of the string of indicator bits in a blank state to the programmed state if, after verifying the written value in E1 and before erasing, i) the value written in E1 matches D1 and ii) all the indicator bits are not in the programmed state, so as to make the value written in E1 accessible in a reading mode,
• wherein the plurality of memory locations are written serially according to successive updatings.