| 摘要 |
PURPOSE:To improve the reliability of a memory system by confirming that the data output of a memory is normal, then writing the normal data automatically to another memory. CONSTITUTION:When the data of a using memory 1 is judged to be wrong by an error detecting part 4, the memory 1 is switched to a spare memory 2. The data output given from the memory 2 is sent to the part 4 and confirmed that it is normal. Then a processing control part 7 gives an indication to a memory switching part 3 to turn the memory 1 into a data writable state with an indication of a microprogram stored in a semifixed memory 8. Then an indication is given to a data switching part 9 to obtain a state where the input data can be supplied to a data writing register 13. Then the normal data is shifted to the register 13 from a data reading register 12 and then written to the address of the memory 1. |
