| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a semiconductor memory apparatus in which increase of layout area due to providing a redundant memory cell and increase of an access time can be suppressed. <P>SOLUTION: The semiconductor memory apparatus having a plurality of memory banks independently accessible, comprises a plurality of read/write amplifiers for reading and writing data for memory cells of memory banks provided respectively in relation of one to one in a plurality of memory banks, a plurality of relieving bit registers being redundant memory cells used instead of a defective memory cell of a corresponding memory bank provided respectively in relation of one to one in a plurality of memory banks, a relieving discriminating circuit discriminating access to a defective memory cell, and a switching control circuit stopping operation of a corresponding read/write amplifier when the defective memory cell is accessed. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
