JP2022514341A - メモリデバイスにおける信号展開キャッシングのページポリシー - Google Patents
メモリデバイスにおける信号展開キャッシングのページポリシー Download PDFInfo
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- JP2022514341A JP2022514341A JP2021535536A JP2021535536A JP2022514341A JP 2022514341 A JP2022514341 A JP 2022514341A JP 2021535536 A JP2021535536 A JP 2021535536A JP 2021535536 A JP2021535536 A JP 2021535536A JP 2022514341 A JP2022514341 A JP 2022514341A
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Abstract
Description
本特許出願は、本願譲受人に譲渡されかつ全体が参照により明白に組み込まれている、2018年12月21日に出願されたYudanovらの「MULTIPLEXED SIGNAL DEVELOPMENT IN A MEMORY DEVICE」という名称の、米国特許仮出願第62/783,388号の優先権を主張するものである。
本特許出願は、2018年12月21日に出願されたYudanovらの「MULTIPLEXED SIGNAL DEVELOPMENT IN A MEMORY DEVICE」という名称の、米国特許仮出願第62/783,388号に対する優先権を主張する、2019年12月20日に出願されたYudanovらの「PAGE POLICIES FOR SIGNAL DEVELOPMENT CACHING IN A MEMORY DEVICE」という名称の、PCT出願番号PCT/US2019/067832に対する優先権を主張するものであり、これらの出願のそれぞれは、本願譲受人に譲渡されかつ全体が参照により明白に組み込まれる。
Claims (28)
- メモリアレイに格納されたデータに対する読み取りコマンドをメモリデバイスで受信することと、
前記コマンドに少なくとも部分的に基づいて、前記データを前記メモリアレイから信号展開コンポーネントアレイに転送することと、
前記転送に少なくとも部分的に基づいて、センスアンプアレイを用いて前記データを検知することであり、前記データが、前記転送の後、前記信号展開コンポーネントアレイに格納された、前記データを検知することと、
前記メモリアレイに格納された追加データに対する1つまたは複数の追加アクセスコマンドを前記メモリデバイスで受信することと、
前記1つまたは複数の追加アクセスコマンドに少なくとも部分的に基づいて、前記追加データを前記メモリアレイから信号展開コンポーネントアレイに転送することと、
前記メモリアレイから前記信号展開コンポーネントアレイへの前記追加データの転送後または転送中、前記データを前記信号展開コンポーネントアレイから前記メモリアレイに書き込むことと、
を含む方法。 - 前記データを前記メモリアレイから前記信号展開コンポーネントアレイに転送することが、
前記メモリアレイのアクセス線セットを前記信号展開コンポーネントアレイと結合することであり、前記アクセス線セットがそれぞれ、前記メモリアレイのメモリセルセットのうちの少なくとも1つに対応する、前記メモリアレイの前記アクセス線セットを前記信号展開コンポーネントアレイと結合することと、
前記結合に少なくとも部分的に基づいて、前記結合に少なくとも部分的に基づいて展開された信号状態を前記信号展開コンポーネントアレイの信号展開コンポーネントセットそれぞれに格納することと、
を含む、請求項1に記載の方法。 - 前記格納の後、前記信号展開コンポーネントアレイから前記アクセス線セットを切り離すことであり、前記データを前記信号展開コンポーネントアレイから前記メモリアレイに書き込むことが、前記アクセス線セットを前記信号展開コンポーネントアレイと再結合することを含む、前記信号展開コンポーネントアレイから前記アクセス線セットを切り離すことをさらに含む、請求項2に記載の方法。
- 前記センスアンプアレイを用いて前記データを検知することが、
前記データが前記信号展開コンポーネントアレイに格納されている間に、前記信号展開コンポーネントセットを前記センスアンプアレイと結合することと、
前記センスアンプアレイのセンスアンプセットによって、前記信号展開コンポーネントセットおよび前記信号展開コンポーネントセットの前記センスアンプアレイとの結合と関連付けられた信号状態に少なくとも部分的に基づいて、論理信号を生成することと、
を含む、請求項2に記載の方法。 - 前記データを前記信号展開コンポーネントアレイから前記メモリアレイに書き込むことが、
前記信号展開コンポーネントアレイを前記メモリアレイのアクセス線セットと結合することであり、前記アクセス線セットがそれぞれ、前記メモリアレイのメモリセルセットのうちの少なくとも1つに対応する、前記信号展開コンポーネントアレイを前記メモリアレイのアクセス線セットと結合することと、
前記結合に少なくとも部分的に基づいて、前記データを前記メモリセルセットに格納することと、
を含む、請求項1に記載の方法。 - 前記データが前記メモリアレイから前記信号展開コンポーネントアレイに転送された後、前記メモリアレイが、もはや前記データを格納していない、請求項1に記載の方法。
- 前記データが前記信号展開コンポーネントアレイに格納されている間に、前記データをリフレッシュすることをさらに含む、請求項1に記載の方法。
- 前記メモリアレイ内のワード線の少なくとも一部をアクティブ化することであり、前記データを前記メモリアレイから前記信号展開コンポーネントアレイに転送することが、前記ワード線の前記少なくとも一部をアクティブ化することに少なくとも部分的に基づく、前記ワード線の前記少なくとも一部をアクティブ化することと、
前記データを前記信号展開コンポーネントアレイから前記メモリアレイに書き込む前に、前記メモリアレイ内の前記ワード線の前記少なくとも一部を非アクティブ化することであり、前記データを前記信号展開コンポーネントアレイから前記メモリアレイに書き込むことが、前記ワード線の前記少なくとも一部を再アクティブ化することを含む、前記ワード線の前記少なくとも一部を非アクティブ化することと、
をさらに含む、請求項1に記載の方法。 - 前記メモリアレイが、第1の種類の記憶素子をそれぞれ含む複数のメモリセルを備え、
前記信号展開コンポーネントアレイの各信号展開コンポーネントが、第2の種類の記憶素子を含む、請求項1に記載の方法。 - 前記第1の種類の記憶素子が、強誘電体素子を含み、
前記第2の種類の記憶素子が、コンデンサを含む、請求項9に記載の方法。 - 前記データが前記メモリアレイから前記信号展開コンポーネントアレイに転送された後、かつ、前記データが前記信号展開コンポーネントアレイから前記メモリアレイに書き込まれる前に、前記データに対する第2の読み取りコマンドを前記メモリデバイスで受信することと、
前記第2の読み取りコマンドに少なくとも部分的に基づいて、前記データが前記信号展開コンポーネントアレイに格納されたものと判定することと、
前記判定に少なくとも部分的に基づいて、前記データが前記信号展開コンポーネントアレイに格納されている間に、前記センスアンプアレイを用いて前記データを検知することと、
をさらに含む、請求項1に記載の方法。 - 前記1つまたは複数の追加読み取りコマンドに応答し、かつ、前記信号展開コンポーネントアレイの容量に少なくとも部分的に基づいて、前記信号展開コンポーネントアレイのキャッシュポリシーに少なくとも部分的に基づいて前記信号展開コンポーネントアレイから前記データをエビクトする旨を決定することであり、前記書き込みが、当該エビクトする旨の決定に少なくとも部分的に基づく、前記データをエビクトする旨を決定することをさらに含む、請求項1に記載の方法。
- 前記キャッシュポリシーが、先入れ先出し(FIFO)ポリシー、最古使用(LRU)ポリシー、または最低頻度使用(LFU)ポリシー、あるいはこれらの任意の組み合わせを含む、請求項12に記載の方法。
- 少なくとも2つのキャッシュポリシーに従って、前記信号展開コンポーネントアレイを動作させることと、
前記少なくとも2つのキャッシュポリシーそれぞれについて、前記信号展開コンポーネントアレイの各性能基準を決定することと、
をさらに含む、請求項13に記載の方法。 - 前記データと関連付けられたアクセスパターンを識別することと、
前記アクセスパターンに少なくとも部分的に基づいて、前記キャッシュポリシーを決定することと、
をさらに含む、請求項12に記載の方法。 - 前記データが、前記メモリアレイ内の第1のメモリセルセットから前記信号展開コンポーネントアレイに読み取られ、
前記データが、前記信号展開コンポーネントアレイから前記メモリアレイ内の第2のメモリセルセットに書き込まれる、請求項1に記載の方法。 - 前記第2のメモリセルセットと関連付けられたアドレスの指示を出力することと、
前記指示に応じた肯定または否定をモニタリングすることであり、前記肯定の受信または前記否定の欠如の識別に少なくとも部分的に基づいて、前記データが前記信号展開コンポーネントアレイから前記第2のメモリセルセットに書き込まれる、前記指示に応じた肯定または否定をモニタリングすることと、
をさらに含む、請求項16に記載の方法。 - 前記第1のメモリセルセットが、オペレーティングシステム用の異なるメモリページと関連付けられ、
前記第2のメモリセルセットが、オペレーティングシステム用の第2のメモリページと関連付けられ、
当該方法が、前記データが前記信号展開コンポーネントアレイから前記第2のメモリセルセットに書き込まれることに少なくとも部分的に基づいて、前記オペレーティングシステム用のメモリページ表を更新することであり、前記オペレーティングシステム用の前記メモリページ表が、論理データアドレスの物理データアドレスへのマッピングを含む、前記オペレーティングシステム用の前記メモリページ表を更新することをさらに含む、請求項17に記載の方法。 - メモリアレイに格納されたデータに対する読み取りコマンドをメモリデバイスで受信することと、
前記読み取りコマンドに少なくとも部分的に基づいて、前記データを前記メモリアレイから信号展開コンポーネントアレイに転送することと、
前記転送に少なくとも部分的に基づいて、センスアンプアレイを用いて前記データを検知することであり、前記データが、前記転送の後、前記信号展開コンポーネントアレイに格納された、前記データを検知することと、
前記転送の後、前記データに少なくとも部分的に基づく情報を前記信号展開コンポーネントアレイから前記メモリアレイに書き込むことと、
前記検知に少なくとも部分的に基づいて、前記メモリデバイスにより前記データを出力することと、
を含む方法。 - 前記データを前記メモリアレイから前記信号展開コンポーネントアレイに転送することが、
前記メモリアレイのアクセス線セットを前記信号展開コンポーネントアレイと結合することであり、前記アクセス線セットがそれぞれ、前記メモリアレイのメモリセルセットのうちの少なくとも1つに対応する、前記メモリアレイの前記アクセス線セットを前記信号展開コンポーネントアレイと結合することと、
前記結合に少なくとも部分的に基づいて、前記結合に少なくとも部分的に基づいて展開された信号状態を前記信号展開コンポーネントアレイの信号展開コンポーネントセットそれぞれに格納することと、
を含む、請求項19に記載の方法。 - 前記アクセス線セットが、前記データが前記信号展開コンポーネントアレイから前記メモリアレイに書き込まれる後まで、前記信号展開コンポーネントアレイと結合されたままである、請求項20に記載の方法。
- 前記メモリアレイ内のワード線の少なくとも一部をアクティブ化することであり、前記データを前記メモリアレイから前記信号展開コンポーネントアレイに転送することが、前記ワード線の前記少なくとも一部をアクティブ化することに少なくとも部分的に基づき、前記ワード線の前記少なくとも一部が、前記データが前記信号展開コンポーネントアレイから前記メモリアレイに書き込まれる後まで、アクティブ化されたままである、前記ワード線の前記少なくとも一部をアクティブ化することをさらに含む、請求項19に記載の方法。
- 前記読み取りコマンドが、読み取り-修正-書き込みコマンドを含み、
当該方法が、前記データが前記信号展開コンポーネントアレイに格納されている間に、前記読み取り-修正-書き込みコマンドに少なくとも部分的に基づいて、前記データを修正することであり、前記データに少なくとも部分的に基づいて書き込まれた前記情報が、前記修正データを含む、前記データを修正することをさらに含む、請求項19に記載の方法。 - 前記メモリデバイスにより前記修正データを出力することをさらに含む、請求項23に記載の方法。
- メモリアレイに格納されたデータにアクセスするためのコマンドをメモリデバイスで受信することと、
前記データを前記メモリアレイから信号展開コンポーネントアレイに転送することと、
前記転送に少なくとも部分的に基づいて、センスアンプアレイを用いて前記データを検知することであり、前記データが、前記転送の後、前記信号展開コンポーネントアレイに格納された、前記データを検知することと、
前記信号展開コンポーネントアレイまたは前記データのページポリシーを識別することと、
前記識別したページポリシーに少なくとも部分的に基づいて、修正データを前記信号展開コンポーネントアレイから前記メモリアレイに書き込むことと、
を含む方法。 - 前記データを含むデータセットのアクセスパターンを識別することと、
前記アクセスパターンに少なくとも部分的に基づいて、前記信号展開コンポーネントアレイの前記ページポリシーを決定することと、
をさらに含む、請求項25に記載の方法。 - 前記ページポリシーの指示を前記メモリデバイスで受信することであり、前記識別が、前記指示に少なくとも部分的に基づく、前記ページポリシーの前記指示を前記メモリデバイスで受信することをさらに含む、請求項25に記載の方法。
- 前記識別したページポリシーに少なくとも部分的に基づいて、前記修正データを書き込むことが、前記識別したページポリシーに少なくとも部分的に基づいて一度に、前記修正データを前記信号展開コンポーネントアレイから前記メモリアレイに書き込むことを含む、請求項25に記載の方法。
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