| 摘要 |
PURPOSE: The memory device is provided, in which access operations on memory cells or memory cell areas which cannot be written to or read from properly are detected and these memory cells or memory cell areas are replaced as quickly as possible and with a minimum level of complexity. CONSTITUTION: The memory device(S) includes a multiplicity of memory cells for storing data; at least one comparison unit having an address input and being configured to check whether an address received at the address input has a memory cell associated therewith which cannot be written to or read from properly or is in a memory cell area containing memory cells which cannot be written to or read from properly; and a selection device connected to the comparison unit, the selection device being configured to ensure that backup memory cells or backup memory cell areas are used instead of memory cells or memory cell areas which cannot be written to or read from properly; wherein information about a location of the memory cells or memory cell areas which are not to be used is supplied to the selection device at an instant at which a determination has not yet been made that the address received at the address input has a memory cell associated therewith which cannot be written to or read from properly or is in a memory cell area containing memory cells which cannot be written to or read from properly.
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