| 摘要 |
<p>PURPOSE:To reduce the power consumption, by rewriting to '0' so as not to discharge bit lines for a memory cell frequently accessed, restoring it to data at the time of reading, and making the same logic data as writing requirement outputtable. CONSTITUTION:At the time of writing requirement, data of '0' is read out from memory cells M7, M32 in which data of '1' is to be written, and read-out data '1' having the same logic as that in writing requirement can be outputted by investing this data by a data restoring circuit 13. Also, data of '1' is read out from memory cells M2, M6, M8, M14-M16, M18, M22-24, M26, M30-M31 in which data of '0' is to be written, and read-out data '0' having the same logic as that in writing requirement can be outputted by inverting this data by the circuit 13. Thereby, memory cells discharging bit lines B1-B7 are M4, M13, M19, M20, M25, M27, M29, and M7, M10, M32, and the number of discharge can be decreased.</p> |
