| 摘要 |
<p>PROBLEM TO BE SOLVED: To easily and surely detect normality of operation of a storage device composed by an elastic store(ES) by constituting it so that an additional check code and checked result of ES read data are collated to each other without a check code writing in/reading from the ES. SOLUTION: In writing, on the basis of incoming write data and a write frame clock, one frame of the data is operated, a block check code is obtained, the data are written in an ES and the block check code is held in a code holding part (1) 3 apart from the write data. Then at the time of reading, data read on the basis of a read-out clock and a read frame clock and block-checked and the result is held in a code holding part (2) 5. Further, a holding output of the check code of a code holding part (1) 3 and a holding output of the check result of the code holding part (2) 5 are compared with each other. By a correspondence detection of this comparison result, normality of the ES operation is confirmed.</p> |
