| 摘要 |
PURPOSE:To enable to prevent the production of 2-bit error, by supperssing data readout/write-in from the memory immediately after the power supply, reading out the data one by one words after the achievement of a given status, and correcting one bit error for re-write-in. CONSTITUTION:Immediately after the application of power supply, the data readout/write-in from the storage device 16 is suppressed with the control means. Further, the control means is operated after the achievement of a given status, data is read out from the storage device 1 one by one, error correction is made with the error correction circuit 19 if there is one bit error in the data, so that re-write-in can be made to the storage device 16. For example, by using the circuit as shown in Figure, the start timing of memory patrol is made with the T counter 1, and the address signal of the address counter 7 is made to +1 through the output signal of the T counter produced every given time, allowing to make data readout, correction and re-write-in word by word. |
