JP5599977B2 - 半導体記憶装置 - Google Patents
半導体記憶装置 Download PDFInfo
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- JP5599977B2 JP5599977B2 JP2009012077A JP2009012077A JP5599977B2 JP 5599977 B2 JP5599977 B2 JP 5599977B2 JP 2009012077 A JP2009012077 A JP 2009012077A JP 2009012077 A JP2009012077 A JP 2009012077A JP 5599977 B2 JP5599977 B2 JP 5599977B2
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- refresh
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C11/00—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor
- G11C11/21—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements
- G11C11/34—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using semiconductor devices
- G11C11/40—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using semiconductor devices using transistors
- G11C11/401—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using semiconductor devices using transistors forming cells needing refreshing or charge regeneration, i.e. dynamic cells
- G11C11/406—Management or control of the refreshing or charge-regeneration cycles
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C11/00—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor
- G11C11/21—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements
- G11C11/34—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using semiconductor devices
- G11C11/40—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using semiconductor devices using transistors
- G11C11/401—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using semiconductor devices using transistors forming cells needing refreshing or charge regeneration, i.e. dynamic cells
- G11C11/406—Management or control of the refreshing or charge-regeneration cycles
- G11C11/40618—Refresh operations over multiple banks or interleaving
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C11/00—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor
- G11C11/21—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements
- G11C11/34—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using semiconductor devices
- G11C11/40—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using semiconductor devices using transistors
- G11C11/401—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using semiconductor devices using transistors forming cells needing refreshing or charge regeneration, i.e. dynamic cells
- G11C11/406—Management or control of the refreshing or charge-regeneration cycles
- G11C11/40622—Partial refresh of memory arrays
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Computer Hardware Design (AREA)
- Dram (AREA)
Description
12 アドレスバッファ
21 リフレッシュカウンタ
22,22a,22b リフレッシュ制御回路
23 セグメントアドレスレジスタ
24 バンクアドレスレジスタ
25 判定回路
31 アクセス制御回路
32 データ入出力回路
41 デコーダ
61 SRラッチ回路
62 ワンショット信号生成回路
Claims (6)
- それぞれ複数のメモリセルからなる複数のセグメントに分割された少なくとも一つのメモリバンクと、
リフレッシュアドレスを生成するリフレッシュカウンタと、を備える半導体記憶装置であって、
前記リフレッシュアドレスにより指定されるメモリセルのうち、前記メモリバンク内の全てのセグメントに属するメモリセルをリフレッシュする第1の動作モードと、
前記リフレッシュアドレスにより指定されるメモリセルのうち、前記メモリバンク内の指定されたセグメントのメモリセルをリフレッシュし、指定されていないセグメントのメモリセルをリフレッシュしない第2の動作モードと、を有し、
リフレッシュ動作開始時にセットされ、リフレッシュ動作完了時にリセットされることによりリフレッシュ状態信号を生成するラッチ回路と、前記第2のモードにおいて前記指定されていないセグメントを前記リフレッシュアドレスが示している場合、前記ラッチ回路のセットを禁止するゲート回路とを含むリフレッシュ制御回路をさらに備えることを特徴とする半導体記憶装置。 - 前記第2の動作モードにおいてリフレッシュを行わないセグメントを記憶するセグメントアドレスレジスタと、
前記セグメントアドレスレジスタに記憶されたアドレスと前記リフレッシュアドレスとを比較する判定回路と、をさらに備え、
前記第2の動作モードにおいては、前記判定回路によって一致が検出されたアドレスに対応するセグメントに対してリフレッシュを行わないことを特徴とする請求項1に記載の半導体記憶装置。 - 前記セグメントアドレスレジスタに記憶されたアドレスは、前記メモリバンク内のロウアドレスの一部であることを特徴とする請求項2に記載の半導体記憶装置。
- 前記セグメントアドレスレジスタに記憶されたアドレスは、前記メモリバンク内のロウアドレスの最上位ビットを含んでいることを特徴とする請求項3に記載の半導体記憶装置。
- 前記メモリバンクを複数備え、
前記複数のメモリバンクのうち、リフレッシュ対象となるメモリバンクを指定するバンクアドレスレジスタをさらに備え、
前記リフレッシュ制御回路は、リフレッシュ対象となるメモリバンクが指定されていない場合、前記判定回路による判定結果にかかわらず、リフレッシュ動作を行わないことを特徴とする請求項1乃至4のいずれか一項に記載の半導体記憶装置。 - 前記リフレッシュ制御回路は、リフレッシュ対象となるメモリバンクが指定されていない場合、前記判定回路による判定結果にかかわらず、前記ラッチ回路のセットを禁止することを特徴とする請求項5に記載の半導体記憶装置。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2009012077A JP5599977B2 (ja) | 2009-01-22 | 2009-01-22 | 半導体記憶装置 |
US12/692,116 US8441879B2 (en) | 2009-01-22 | 2010-01-22 | Semiconductor memory device requiring refresh operation |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2009012077A JP5599977B2 (ja) | 2009-01-22 | 2009-01-22 | 半導体記憶装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2010170612A JP2010170612A (ja) | 2010-08-05 |
JP5599977B2 true JP5599977B2 (ja) | 2014-10-01 |
Family
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Application Number | Title | Priority Date | Filing Date |
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JP2009012077A Active JP5599977B2 (ja) | 2009-01-22 | 2009-01-22 | 半導体記憶装置 |
Country Status (2)
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US (1) | US8441879B2 (ja) |
JP (1) | JP5599977B2 (ja) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100899394B1 (ko) * | 2007-10-31 | 2009-05-27 | 주식회사 하이닉스반도체 | 리프래쉬 제어 회로 |
KR102289001B1 (ko) | 2014-06-09 | 2021-08-13 | 삼성전자주식회사 | 솔리드 스테이드 드라이브 및 그것의 동작 방법 |
KR20160035897A (ko) * | 2014-09-24 | 2016-04-01 | 에스케이하이닉스 주식회사 | 반도체 메모리 장치 및 그를 포함하는 시스템 |
JP2017181895A (ja) | 2016-03-31 | 2017-10-05 | 東京応化工業株式会社 | 化学増幅型ポジ型感光性樹脂組成物 |
US10332582B2 (en) * | 2017-08-02 | 2019-06-25 | Qualcomm Incorporated | Partial refresh technique to save memory refresh power |
US11735246B2 (en) * | 2021-11-15 | 2023-08-22 | Micron Technology, Inc. | Semiconductor device performing refresh operation |
US11621052B1 (en) * | 2021-12-13 | 2023-04-04 | Nanya Technology Corporation | Method for testing memory device and test system |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4056173B2 (ja) * | 1999-04-14 | 2008-03-05 | 富士通株式会社 | 半導体記憶装置および該半導体記憶装置のリフレッシュ方法 |
JP3745185B2 (ja) * | 2000-03-13 | 2006-02-15 | 沖電気工業株式会社 | ダイナミックランダムアクセスメモリ |
JP2001338489A (ja) * | 2000-05-24 | 2001-12-07 | Mitsubishi Electric Corp | 半導体装置 |
JP4767401B2 (ja) * | 2000-10-30 | 2011-09-07 | ルネサスエレクトロニクス株式会社 | 半導体記憶装置及びその製造方法 |
US6590822B2 (en) * | 2001-05-07 | 2003-07-08 | Samsung Electronics Co., Ltd. | System and method for performing partial array self-refresh operation in a semiconductor memory device |
JP2002373489A (ja) * | 2001-06-15 | 2002-12-26 | Mitsubishi Electric Corp | 半導体記憶装置 |
KR100424178B1 (ko) * | 2001-09-20 | 2004-03-24 | 주식회사 하이닉스반도체 | 반도체 메모리 장치의 내부어드레스 발생회로 |
US6618314B1 (en) * | 2002-03-04 | 2003-09-09 | Cypress Semiconductor Corp. | Method and architecture for reducing the power consumption for memory devices in refresh operations |
US6665224B1 (en) * | 2002-05-22 | 2003-12-16 | Infineon Technologies Ag | Partial refresh for synchronous dynamic random access memory (SDRAM) circuits |
JP2004273029A (ja) * | 2003-03-10 | 2004-09-30 | Sony Corp | 記憶装置およびそれに用いられるリフレッシュ制御回路ならびにリフレッシュ方法 |
US7342841B2 (en) * | 2004-12-21 | 2008-03-11 | Intel Corporation | Method, apparatus, and system for active refresh management |
KR100642759B1 (ko) * | 2005-01-28 | 2006-11-10 | 삼성전자주식회사 | 선택적 리프레쉬가 가능한 반도체 메모리 디바이스 |
KR100644221B1 (ko) * | 2005-07-19 | 2006-11-10 | 삼성전자주식회사 | 반복 리프레쉬를 구동하는 리프레쉬 제어회로 및 이를포함하는 반도체 메모리 장치 |
US7492656B2 (en) * | 2006-04-28 | 2009-02-17 | Mosaid Technologies Incorporated | Dynamic random access memory with fully independent partial array refresh function |
JP4299849B2 (ja) * | 2006-08-22 | 2009-07-22 | エルピーダメモリ株式会社 | 半導体記憶装置及びそのリフレッシュ制御方法 |
JP2008276878A (ja) | 2007-04-27 | 2008-11-13 | Toshiba Corp | 半導体記憶装置 |
US7613060B2 (en) * | 2007-05-21 | 2009-11-03 | Micron Technology, Inc. | Methods, circuits, and systems to select memory regions |
KR100899394B1 (ko) * | 2007-10-31 | 2009-05-27 | 주식회사 하이닉스반도체 | 리프래쉬 제어 회로 |
-
2009
- 2009-01-22 JP JP2009012077A patent/JP5599977B2/ja active Active
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2010
- 2010-01-22 US US12/692,116 patent/US8441879B2/en active Active
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Publication number | Publication date |
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JP2010170612A (ja) | 2010-08-05 |
US20100182864A1 (en) | 2010-07-22 |
US8441879B2 (en) | 2013-05-14 |
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