| 摘要 |
A sub-memory (11) is provided in addition to a main memory (10) so as to store data from a main control section (7) in the main memory (10) and the sub-memory (11), and error detecting circuits (12 and 13) respectively detect the errors of the data stored in the memories (10 and 11) and control selectors (8 and 9) so that data can be read out from the error-free memories. |
