JP2014164794A - 可変抵抗メモリセルのためのecc管理のための装置および方法 - Google Patents
可変抵抗メモリセルのためのecc管理のための装置および方法 Download PDFInfo
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- G—PHYSICS
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- G11C17/16—Read-only memories programmable only once; Semi-permanent stores, e.g. manually-replaceable information cards in which contents are determined by selectively establishing, breaking or modifying connecting links by permanently altering the state of coupling elements, e.g. PROM using electrically-fusible links
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Abstract
【解決手段】データ記憶デバイスは、概して、少なくとも1つの可変抵抗メモリセル内の既定の閾値からの変動を識別し、その少なくとも1つの可変抵抗メモリセルに対する第1のエラー訂正符号(ECC)レベルを第2のECCレベルに格上げするように構成される少なくとも1つのコントローラを備えて構築され、動作され得る。
【選択図】図2
Description
Count(Adj)=Actual Reads+K1(Temp)+K2(Age)+K3(Delta−V) (1)
上式のような調節された読み出しカウントを提供してもよく、ここでCount(Adj)は調節されたカウント値であり、Actual Readsは実際の読み出し動作を表し、Tempは温度の読み出し/範囲/区域であり、Ageはブロックの経過時間を表し、Delta−Vはデータアクセス動作中にセル抵抗において検出されたまたは予測された変更を表す。経過時間は、モジュール242を用いて、選択されたメモリ位置での書き込みおよび/または読み出しの合計数との関連等、様々な方式で追跡されることができる。Delta−V値は、異なる読み出し電圧および抵抗閾値の適用に応答して利用されることができる。他の因数が使用され得ることは理解されよう。
Claims (20)
- 少なくとも1つの可変抵抗メモリセル内の既定の閾値からの変動を識別し、前記少なくとも1つの可変抵抗メモリセルに対する第1のエラー訂正符号(ECC)レベルを第2のECCレベルに格上げするように構成されるコントローラを備える、装置。
- 前記少なくとも1つの可変抵抗メモリセルが、ソリッドステートメモリアレイの一部である、請求項1に記載の装置。
- 前記ソリッドステートメモリアレイが、複数の異なる種類の可変抵抗メモリセルを有する、請求項2に記載の装置。
- 第1の種類の可変抵抗メモリセルは、プログラム可能な金属化セルを含む、請求項3に記載の装置。
- 第2の種類の可変抵抗メモリセルは、相変化ランダムアクセスメモリセルを含む、請求項4に記載の装置。
- 第3の種類の可変抵抗メモリセルは、抵抗性ランダムアクセスメモリセルを含む、請求項5に記載の装置。
- 前記コントローラが、前記既定の抵抗閾値からの変動を反応的に識別するために、複数の異なるメモリセル動作条件を同時に分析するように構成される評価エンジンを備える、請求項1に記載の装置。
- 前記評価エンジンが、モデルジェネレータに、前記既定の抵抗閾値からの変動を事前対策的に識別するためのデータを提供する、請求項7に記載の装置。
- 前記既定の抵抗閾値からの前記識別された変動は、前記既定の抵抗閾値を満たす前記少なくとも1つの可変抵抗メモリセルに対応する、請求項8に記載の装置。
- 少なくとも1つの可変抵抗メモリセル内の既定の抵抗閾値からの変動を識別することと、前記少なくとも1つの可変抵抗メモリセルに対する第1のエラー訂正符号(ECC)レベルを第2のECCレベルに格上げすることと、を含む、方法。
- 前記第1のECCレベルが、チェックサムを含む、請求項10に記載の方法。
- 前記第2のECCレベルが、パリティチェックを含む、請求項11に記載の方法。
- 前記第2のECCレベルが、前記第1のECCレベルと異なるECCスキームを備える、請求項10に記載の方法。
- 前記コントローラが、複数の異なる動作パラメータを使用して、メモリセル抵抗における変動の予測モデルを生成する、請求項10に記載の方法。
- 前記予測モデルが、ECCエンジンによって既定のメモリセルのECCを予測するために使用される、請求項14に記載の方法。
- 前記第1のECCレベルが、可変抵抗メモリセルのページに対応し、前記第2のECCレベルが、個別の可変抵抗メモリセルに対応する、請求項10に記載の方法。
- 少なくとも1つの可変抵抗メモリセル内の既定の抵抗閾値から将来の変動を識別することと、前記少なくとも1つの可変抵抗メモリセルに対する第1のエラー訂正符号(ECC)レベルを第2のECCレベルに事前対策的に格上げすることと、を含む、方法。
- 識別された可変抵抗メモリセルに論理的に近位の未識別の可変抵抗メモリセルが、前記第1のECCレベルから前記第2のECCレベルに格上げされる、請求項17に記載の方法。
- 識別された可変抵抗メモリセルに物理的に近位の未識別の可変抵抗メモリセルが、前記第1のECCレベルから前記第2のECCレベルに格上げされる、請求項17に記載の方法。
- 前記第1のECCレベルが、前記コントローラの評価エンジン部分からの観察された動作データに応じて予測される、請求項17に記載の方法。
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US13/779,434 | 2013-02-27 | ||
US13/779,434 US9164832B2 (en) | 2013-02-27 | 2013-02-27 | ECC management for variable resistance memory cells |
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JP2014164794A true JP2014164794A (ja) | 2014-09-08 |
JP2014164794A5 JP2014164794A5 (ja) | 2017-04-20 |
JP6313994B2 JP6313994B2 (ja) | 2018-04-18 |
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US (1) | US9164832B2 (ja) |
JP (1) | JP6313994B2 (ja) |
KR (1) | KR101591694B1 (ja) |
CN (1) | CN104008773B (ja) |
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2014
- 2014-02-25 JP JP2014033996A patent/JP6313994B2/ja not_active Expired - Fee Related
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WO2017043149A1 (ja) * | 2015-09-08 | 2017-03-16 | ソニー株式会社 | メモリコントローラ、メモリおよびメモリシステム |
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JP6313994B2 (ja) | 2018-04-18 |
KR20140107133A (ko) | 2014-09-04 |
CN104008773B (zh) | 2017-12-12 |
US20140245108A1 (en) | 2014-08-28 |
KR101591694B1 (ko) | 2016-02-04 |
CN104008773A (zh) | 2014-08-27 |
US9164832B2 (en) | 2015-10-20 |
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