| 摘要 |
PURPOSE:To avoid useless error logging, by providing a rewrite-in circuit rewriting a corrected data to a storage device when a correctable error is detected and a control circuit performing control based on the result discriminated by rewrite-in. CONSTITUTION:Data read out at a readout circuit 20 from a storage device 10 is checked for the presence of error at an error detection and correction circuit 30, and the output data is transmitted to a control circuit 50. If the address storing the data is not recorded in the circuit 50, the circuit 50 instructs rewrite- in to the storage device 10, the data is transferred from the circuit 60 to a line 112 to make rewrite-in to the storage device 10. After rewrite-in, when a re- readout instruction signal is started via a signal line 109, the re-readout of this data is made at the readout circuit 20. After the re-readout of the data, if the error correction is informed to the circuit 50 for the data at the circuit 30, an error report instruction signal is transmitted to an error report circuit 40 and the error information is transmitted via a signal line 107. |
