| 摘要 |
Method for writing data in a non volatile memory unit comprising memory pages, each page (mp) including a predetermined number of memory cells, each memory cell (mc) storing a memory word (mw), the memory word (mw) comprising a predetermined sequence (pre) of digital values also indicated as value (1) and complementary value (0), the method providing an erase operation for erasing all the memory words (mw) in the memory page (mp), setting the predetermined sequence of digital values to a sequence of complementary values (0), and a program operation for storing in the memory cell (mc) a word (mw1) to be stored, setting a sequence (post) of digital values of the word to be stored (mw1) in the memory cell (mc). The method provides the steps of: for each memory cell (mc) of the memory page (mp), comparing the memory word (mw) stored with the word (mw1) to be stored and returning a positive check if complementary values (0) of the sequence (post) corresponds to complementary values (0) of the predetermined sequence (pre); if the check is negative, executing the erase operation. For each memory cell (mc), comparing the memory word (mw) stored with the word (mw1) to be stored and executing the program operation only if the word (mw1) to be stored is different from the memory word stored (mw); repeating the steps for each memory page (mp) wherein the data must be stored. |
