公开(公告)号：DE60102203D1

公开(公告)日：2004-04-08

申请号：DE60102203

申请日：2001-12-13

Applicant: ST MICROELECTRONICS SRL

Inventor： DE SANDRE GUIDO ,  PASOTTI MARCO ,  ROLANDI PIER LUIGI ,  GUAITINI GIOVANI ,  IEZZI DAVID ,  POLES MARCO

IPC: G11C11/56

Abstract: It is described a programming method for a multilevel memory cell able to store a plurality of bits in a plurality of levels. The method comprises the phases of: initially programming a cell threshold value to a first set of levels [0;(m-1)] being m a submultiple of the plurality of levels of the multilevel cell; reprogramming without erasing another set of levels [m;(2m-1)] containing the same number m of levels as the first set; reiterating the reprogramming without erasing phase until the levels of the multilevel cell are exhausted. It is also described a multilevel memory device of the type comprising a plurality of multilevel memory cells organized into sectors, the sectors being themselves split into a plurality of data units wherein a data updating operation is performed in parallel, the data units being programmed by means of the programming method.