NON-VOLATILE MEMORY CONTROL METHOD

摘要

A control method of nonvolatile memory, wherein it does not happen that data which ought to have been erased are not erased or data which ought to have been written are lost even in the case where forced interruption takes place due to shutdown of power source for memory device, reset command or the like, is provided. When data are written in a last page of a block, the block is validated by setting the block data validation flag provided in the redundant area of the last page of the block 0 (valid). Furthermore, by providing a counter for judging new or old, data can be protected even in the case where the above-mentioned solution means cannot respond to.