MEMORY CONTROLLER, MEMORY CONTROLLER CONTROL METHOD, AND MEMORY SYSTEM
To provide a memory controller, a memory controller control method, and a memory system capable of appropriately storing determination voltages for threshold voltages of a multilevel memory into a memory region.SOLUTION: According to one embodiment, a memory controller includes a compression unit th...
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Zusammenfassung: | To provide a memory controller, a memory controller control method, and a memory system capable of appropriately storing determination voltages for threshold voltages of a multilevel memory into a memory region.SOLUTION: According to one embodiment, a memory controller includes a compression unit that compresses two or more types of determination voltages for a threshold voltage of a memory cell to a vector quantity, the memory cell being capable of storing three or more types of values. The memory controller further includes a storing unit that stores the vector quantity into a memory region. The memory controller further includes a decompression unit that decompresses the vector quantity to the determination voltages.SELECTED DRAWING: Figure 7
【課題】多値メモリの閾値電圧の判定電圧をメモリ領域内に好適に記憶させることが可能なメモリコントローラ、メモリコントローラの制御方法、およびメモリシステムに関する。【解決手段】一の実施形態によれば、メモリコントローラは、3種類以上の値を記憶可能なメモリセル用の閾値電圧の2種類以上の判定電圧を、ベクトル量に圧縮する圧縮部を備える。前記コントローラは、さらに、前記ベクトル量をメモリ領域内に記憶させる記憶部を備える。前記コントローラは、さらに、前記ベクトル量を前記判定電圧に伸張する伸張部を備える。【選択図】図7 |
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