| 摘要 |
PURPOSE:To increase the detection accuracy for the error of the reading data, by giving a comparison between the value summed up through the inspection circuit at a certain part of each record and the accumulated value during the writing and recorded on the memory in case the recorded file data is read. CONSTITUTION:The file data FD sent from the buffer circuit 1 is sent to the switch circuit 9 via the output terminal (a) of the selection circuit 6 and recorded to the file memory circuit 5 via the writing circuit 3. When reading, the data FD read in precedently is read by the reading circuit 4 and sent to the circuit 1 through the terminal (a) of the selection circuit 6'. In this case, the data group (a-z) to be inspected is sent to the inspection circuit 7' via the output terminal (b) of the circuit 6' to receive an inspection, and the result of this inspection is accumulated SM' in the accumulator 8'. Then a comparison 10 is given between the accumulated value SM' and the accumulated value SM during the writing and sent from the output terminal (c) of the circuit 6'. And the error detection signal NG is delivered when no coincidence is obtained through the above comparison. As a result, the detection accuracy can be increased for the error of the reading data. |
