| 摘要 |
<p>PURPOSE: To provide a memory system efficiently rewritable without retreating the data in an erase area at a rewriting time. CONSTITUTION: Memory chips CH1-CHk capable of simultaneously writing the data in plural pieces of memory cells on one word line by using a sense latch circuit, and an interface means 100 interfacing them with the outside are adopted, and one word line is defined one sector similarly to erasure, and the write in sector is attained. Since the unit of the write coincides with the same of the erasure, the temporarily keeping work of the data required when the data are rewritten and a retreat area for it are eliminated.</p> |
