| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a semiconductor integrated circuit system having an electrically rewritable nonvolatile semiconductor storage device which can accelerate write operation. <P>SOLUTION: The semiconductor integrated circuit system is equipped with a semiconductor chip and a nonvolatile memory cell which is arranged on this chip, memorizable of data of three or more values and rewritable of data, and changes two or more distribution widths of a write threshold voltage according to two or more write levels. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
