Method of selecting trimmings in non-volatile memories, corresponding device and computer program product

A method, comprising:

• selecting trimmings out of a set of candidate trimmings for analog blocks in a non-volatile memory (NVM) device and applying the selected trimmings to the analog blocks in the NVM device;
• performing a reading operation of a fixed pattern using the analog blocks in the NVM device having applied thereto the selected trimmings, obtaining a read pattern;
• checking if the read pattern is equal to the fixed pattern;
• and
• in response to the read pattern being not equal to the fixed pattern and in a presence of other trimmings still to be selected in the set of candidate trimmings, selecting out of the set of candidate trimmings a new set of trimmings and repeating with the new set of trimmings the performing, checking, and selecting in response to the checking.

A non-volatile memory (NVM) device comprising analog blocks configured to have application trimmings applied thereto, the NVM device configured to:

• select trimmings out of a set of candidate trimmings for the analog blocks in the NVM device and apply the selected trimmings to the analog blocks in the NVM device;
• perform a reading operation of a fixed pattern using the analog blocks in the NVM device having applied thereto the selected trimmings, obtaining a read pattern;
• check if the read pattern is equal to the fixed pattern;
• and
• in response to the read pattern being equal to the fixed pattern, select the selected trimmings as the application trimmings for application to the analog blocks;
• in response to the read pattern being not equal to the fixed pattern and in a presence of other trimmings still to be selected in the set of candidate trimmings, select out of the set of candidate trimmings a new set of trimmings and repeating with the new set of trimmings the perform, check, and select in response to the checking;
• and
• in response to the read pattern being not equal to the fixed pattern and in an absence of the other trimmings still to be selected in the set of candidate trimmings, indicate a failure in selecting any trimmings for the application to the analog blocks.

A computer program product loadable in a control unit of a non-volatile memory (NVM) device, the NVM device comprising analog blocks configured to have application trimmings applied thereto, the computer program product comprising portions of software code configured to cause the NVM device to implement, in response to the computer program product being run in the control unit of the NVM device:

• select trimmings out of a set of candidate trimmings for the analog blocks in the NVM device and apply the selected trimmings to the analog blocks in the NVM device;
• perform a reading operation of a fixed pattern using the analog blocks in the NVM device having applied thereto the selected trimmings, obtaining a read pattern;
• check if the read pattern is equal to the fixed pattern;
• and
• in response to the read pattern being equal to the fixed pattern, select the selected trimmings as the application trimmings for application to the analog blocks;
• in response to the read pattern being not equal to the fixed pattern and in a presence of other trimmings still to be selected in the set of candidate trimmings, select out of the set of candidate trimmings a new set of trimmings and repeating with the new set of trimmings the perform, check, and select in response to the checking;
• and
• in response to the read pattern being not equal to the fixed pattern and in an absence of the other trimmings still to be selected in the set of candidate trimmings, indicate a failure in selecting any trimmings for the application to the analog blocks.