| 摘要 |
PURPOSE:To prevent misrecognition of a data block by providing a data register for storing data including block numbers. CONSTITUTION:After writing a data block, if an error arises in an operation after reading its block, the backward read is executed, and the readout data at that time are stored in the data register 10. A block number part BNO is taken out of the data stored in the data register 10 to be sent to a microprocessor 9 to confirm whether a block skip has accurately been performed or not.
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