JP4804479B2 - 半導体装置およびその制御方法 - Google Patents
半導体装置およびその制御方法Info
- Publication number
- JP4804479B2 JP4804479B2 JP2007550029A JP2007550029A JP4804479B2 JP 4804479 B2 JP4804479 B2 JP 4804479B2 JP 2007550029 A JP2007550029 A JP 2007550029A JP 2007550029 A JP2007550029 A JP 2007550029A JP 4804479 B2 JP4804479 B2 JP 4804479B2
- Authority
- JP
- Japan
- Prior art keywords
- data
- circuit
- inverted
- bits
- memory cell
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C16/00—Erasable programmable read-only memories
- G11C16/02—Erasable programmable read-only memories electrically programmable
- G11C16/06—Auxiliary circuits, e.g. for writing into memory
- G11C16/10—Programming or data input circuits
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C2207/00—Indexing scheme relating to arrangements for writing information into, or reading information out from, a digital store
- G11C2207/22—Control and timing of internal memory operations
- G11C2207/2263—Write conditionally, e.g. only if new data and old data differ
Description
Claims (11)
- 不揮発性メモリセルを複数配置したメモリセルアレイと、
前記メモリセルアレイにプログラムすべきデータを分割した分割データの書き込むビットの総数を検出し、前記ビットの総数を所定のビットの数と比較する検出回路と、
前記ビットの総数を前記所定のビットの数と比較した結果に応じ前記分割データを反転または非反転したデータである反転データを保持するラッチ回路と、
前記ラッチ回路と接続し、前記反転データを前記メモリセルアレイにプログラムするライト回路と、
前記検出回路、前記ラッチ回路および前記ライト回路に接続し、前記ライト回路に前記反転データを前記メモリセルアレイにプログラムさせる間に、前記検出回路に次の分割データの書き込むビットの総数を検出させ、前記ビットの総数を前記所定のビットの数と比較させる制御回路と、を具備する半導体装置。 - 前記反転データが反転または非反転かを示す指標データを保持する指標ラッチ回路を具備し、
前記検出回路は、前記ビットの総数を前記所定のビットの数と比較した結果に応じ、前記指標データを前記指標ラッチ回路に出力し、
前記ライト回路は、前記反転データを前記メモリセルアレイにプログラムする際に、前記指標データを前記指標ラッチ回路から前記メモリセルアレイにプログラムする請求項1記載の半導体装置。 - 前記分割データを前記ラッチ回路に転送するためのスイッチ回路を有し、
前記検出回路が前記分割データの書き込むビットの総数を検出し、前記ビットの総数を所定のビットの数と比較する間は、前記スイッチ回路はオフし、前記ラッチ回路に前記反転データを転送する間は、前記スイッチ回路はオンする請求項1または2記載の半導体装置。 - 外部回路より入力された前記プログラムすべきデータを記憶し、前記検出回路および前記ラッチ回路に前記分割データを出力する記憶装置を具備する請求項1から3のいずれか一項記載の半導体装置。
- 前記ライト回路は、前記反転データを前記メモリセルアレイにプログラムする前に、前記メモリセルアレイ内の前記反転データをプログラムすべきメモリセルに接続するビットラインをプリチャージし、
前記制御回路は、前記ライト回路が前記プリチャージしているの間に、前記検出回路に次の分割データの書き込むビットの総数を検出させ、前記ビットの総数を前記所定のビットの数と比較させる請求項1から4のいずれか一項記載の半導体装置。 - 不揮発性メモリセルを複数配置したメモリセルアレイと、
前記メモリセルアレイから読み出すべきデータを分割した分割データを前記メモリセルから読み出すリード回路と、
前記分割データがプログラムされた際に反転または非反転されたかを示す指標データが反転または非反転を示すかを判断する制御回路と、
前記リード回路が読み出した分割データを保持し、前記制御回路の反転または非反転の判断結果に応じ、前記分割データを反転または非反転したデータである反転データを出力するラッチ回路と、を具備し、
前記制御回路が、前記指標データが反転または非反転を示すかを判断する間に、リード回路は次の分割データを前記メモリセルアレイから読み出す半導体装置。 - 前記ラッチ回路が前記分割データを保持する際に前記指標データを保持する指標ラッチ回路を具備し、
前記リード回路は、前記分割データを前記メモリセルアレイから読み出す際に前記指標データを読み出し、
前記制御回路は、前記指標ラッチ回路から前記指標データを読み出し、前記指標データを用い、前記分割データが書き込みの際反転または非反転されたかを判断する請求項6記載の半導体装置。 - 前記分割データを前記ラッチ回路に転送するためのスイッチ回路を有し、
前記制御回路が、前記分割データが書き込みの際反転または非反転されたかを判断する間は、前記スイッチ回路はオフし、前記リード回路から前記ラッチ回路に前記分割データを転送する間は、前記スイッチ回路はオンする請求項7記載の半導体装置。 - 前記ラッチ回路の出力した前記反転データを記憶し、前記メモリセルアレイから前記反転データを含む前記読み出すべきデータを外部回路に出力する記憶装置を具備する請求項6から8いずれか一項記載の半導体装置。
- 不揮発性メモリセルを複数配置したメモリセルアレイを具備する半導体装置の制御方法において、
前記メモリセルアレイにプログラムすべきデータを分割した分割データの書き込むビットの総数を検出するステップと、
前記ビットの総数を所定のビットの数と比較するステップと、
前記ビットの総数を前記所定のビットの数との比較結果に応じ前記分割データを反転または非反転し反転データとするステップと、
前記反転データを前記メモリセルアレイにプログラムするステップと、を有し、
前記反転データをプログラムするステップを行う間に、次の分割データの書き込むビットの総数を検出するステップと前記ビットの総数を所定のビットの数と比較するステップとを行う半導体装置の制御方法。 - 不揮発性メモリセルを複数配置したメモリセルアレイを具備する半導体装置において、
前記メモリセルアレイから読み出すべきデータを分割した分割データを前記メモリセルから読み出すステップと、
前記分割データがプログラムされた際に反転または非反転されたかを判断するステップと、
前記反転または非反転の判断結果に応じ、前記分割データを反転または非反転するステップと、を有し、
前記反転または非反転を示すかを判断するステップを行う間に、次の分割データを前記メモリセルアレイから読み出すステップを行う半導体装置の制御方法。
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2005/022827 WO2007069295A1 (ja) | 2005-12-13 | 2005-12-13 | 半導体装置およびその制御方法 |
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| JPWO2007069295A1 JPWO2007069295A1 (ja) | 2009-05-21 |
| JP4804479B2 true JP4804479B2 (ja) | 2011-11-02 |
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| Country | Link |
|---|---|
| US (1) | US7450419B2 (ja) |
| JP (1) | JP4804479B2 (ja) |
| TW (1) | TWI345789B (ja) |
| WO (1) | WO2007069295A1 (ja) |
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Also Published As
| Publication number | Publication date |
|---|---|
| US7450419B2 (en) | 2008-11-11 |
| WO2007069295A1 (ja) | 2007-06-21 |
| JPWO2007069295A1 (ja) | 2009-05-21 |
| US20070180184A1 (en) | 2007-08-02 |
| TWI345789B (en) | 2011-07-21 |
| TW200731284A (en) | 2007-08-16 |
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