JP6123017B2 - 可変レイテンシーメモリ動作用装置および方法 - Google Patents
可変レイテンシーメモリ動作用装置および方法 Download PDFInfo
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- JP6123017B2 JP6123017B2 JP2016500725A JP2016500725A JP6123017B2 JP 6123017 B2 JP6123017 B2 JP 6123017B2 JP 2016500725 A JP2016500725 A JP 2016500725A JP 2016500725 A JP2016500725 A JP 2016500725A JP 6123017 B2 JP6123017 B2 JP 6123017B2
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- 230000015654 memory Effects 0.000 title claims description 155
- 238000000034 method Methods 0.000 title description 7
- 230000004913 activation Effects 0.000 claims description 66
- 230000004044 response Effects 0.000 claims description 32
- 239000000872 buffer Substances 0.000 description 46
- 238000010586 diagram Methods 0.000 description 36
- 239000004065 semiconductor Substances 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/14—Handling requests for interconnection or transfer
- G06F13/16—Handling requests for interconnection or transfer for access to memory bus
- G06F13/1668—Details of memory controller
- G06F13/1689—Synchronisation and timing concerns
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/14—Handling requests for interconnection or transfer
- G06F13/16—Handling requests for interconnection or transfer for access to memory bus
- G06F13/1605—Handling requests for interconnection or transfer for access to memory bus based on arbitration
- G06F13/161—Handling requests for interconnection or transfer for access to memory bus based on arbitration with latency improvement
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C7/00—Arrangements for writing information into, or reading information out from, a digital store
- G11C7/10—Input/output [I/O] data interface arrangements, e.g. I/O data control circuits, I/O data buffers
- G11C7/1051—Data output circuits, e.g. read-out amplifiers, data output buffers, data output registers, data output level conversion circuits
- G11C7/106—Data output latches
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C7/00—Arrangements for writing information into, or reading information out from, a digital store
- G11C7/10—Input/output [I/O] data interface arrangements, e.g. I/O data control circuits, I/O data buffers
- G11C7/1051—Data output circuits, e.g. read-out amplifiers, data output buffers, data output registers, data output level conversion circuits
- G11C7/1063—Control signal output circuits, e.g. status or busy flags, feedback command signals
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C7/00—Arrangements for writing information into, or reading information out from, a digital store
- G11C7/22—Read-write [R-W] timing or clocking circuits; Read-write [R-W] control signal generators or management
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C8/00—Arrangements for selecting an address in a digital store
- G11C8/06—Address interface arrangements, e.g. address buffers
-
- 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
- G11C2207/2209—Concurrent read and write
-
- 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
- G11C2207/2272—Latency related aspects
-
- 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
- G11C2207/229—Timing of a write operation
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- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Human Computer Interaction (AREA)
- Dram (AREA)
- Memory System (AREA)
Description
本出願は、2013年3月15日に出願された米国非仮特許出願整理番号13/838,296に対する優先権を享受する権利を主張し、米国非仮特許出願整理番号13/838,296は、その全体において、あらゆる目的で参照によって本明細書に組み入れられる。
バッファ170の複数の行データバッファ174のうちの一つに読み出しデータを提供してもよい。データバッファ170は、いかなる数の行データバッファ174を含んでもよく、少なくとも一実施形態においては、アドレスバッファ160およびデータバッファ170は、其々、同一数の行アドレスバッファ166および行データバッファ174を含んでもよい。幾つかの実施形態においては、行データバッファ174および行アドレスバッファ166の数は異なってもよい。読み出しデータは、バッファアドレスBAに少なくとも部分的に基づいて、行データバッファ174からマルチプレクサ176へと提供され、その後、ステートマシン178に提供されてもよい。ステートマシン178は、制御信号CTLに少なくとも部分的に基づいて、データバス135へと読み出しデータを提供してもよい。
Claims (20)
- 先に発行されるアクティブ化コマンド及びその後に発行されるリード又はライトコマンドを受けて、リード又はライトのメモリ動作を実行するメモリであって、
前記メモリ動作が実行可能であるかどうかを、前記アクティブ化コマンドの発行から前記リード又はライトコマンドの発行までの時間間隔が可変レイテンシー期間に含まれるかどうかで判断し、
その判断結果として、実行可能であることを示す情報か実行可能でないことを示す情報を返信し、
実行可能であるときは、前記メモリ動作を実行し、
実行可能でないときは、前記アクティブ化コマンドを伴わない前記リード又はライトコマンドのみの再発行を待つ、
ように構成されたメモリ、
を備える装置。 - 前記判断は、前記アクティブ化コマンド及び前記リード又はライトコマンドの両方の発行をもって行うように構成された、
請求項1に記載の装置。 - 前記アクティブ化コマンドと前記リード又はライトコマンドとの間に発行されるチェックコマンドを更に受け、
前記判断は、前記アクティブ化コマンドの発行から前記チェックコマンドの発行までの時間間隔が前記可変レイテンシー期間に含まれるかどうかで行われる、
請求項1に記載の装置。 - 前記判断結果として実行可能でないときは、
新たなチェックコマンドを更に受け、
前記判断は、前記アクティブ化コマンドの発行から前記新たなチェックコマンドの発行までの時間間隔が前記可変レイテンシー期間に含まれるかどうかで行われる、
請求項3に記載の装置。 - 前記判断結果として実行可能であるときは、
前記チェックコマンドを受けた後に、前記リード又はライトコマンドを受け、前記リード又はライトコマンドに基づいて前記メモリ動作を実行する、
請求項3に記載の装置。 - 前記メモリ動作が実行可能であるかどうかを、前記アクティブ化コマンドの発行から前記リードコマンドの発行までの時間間隔が可変レイテンシー期間に含まれるかどうかで判断し、
その判断結果として実行可能であるときは、
更に、ライトコマンドの発行を受けて前記ライトのメモリ動作を実行する
請求項1に記載の装置。 - 前記アクティブコマンドを受信する前にプリアクティブコマンドを受信し、前記プリアクティブコマンド及び前記アクティブコマンドの両方に基づいてアクセスされるべき行アドレスが確定する請求項1記載の装置。
- 前記実行可能でないことを示す情報は、前記可変レイテンシー期間の残りの期間を示す情報を包含する請求項1記載の装置。
- 先にアクティブ化コマンドを発行し、その後にリード又はライトコマンドを発行して、リード又はライトのメモリ動作を実行させるコントローラであって、
前記アクティブ化コマンドの発行から前記リード又はライトコマンドの発行までの時間間隔が可変レイテンシー期間に含まれるかどうかを判断した結果として、前記メモリ動作が実行可能であることを示す情報か実行可能でないことを示す情報を受信し、
実行可能であるときは、前記リードコマンドに基づくデータを受信し、又は、前記ライトコマンドに基づくデータを送信し、
実行可能でないときは、前記アクティブ化コマンドを伴わない前記リード又はライトコマンドのみを再発行する、
ように構成されたコントローラ、
を備える装置。 - 前記アクティブ化コマンドを発行した後であって前記リード又はライトコマンドを発行する前にチェックコマンドを発行し、
前記判断結果として実行可能でないときは、
新たなチェックコマンドを更に発行する、
ように構成されたコントローラ、
を備える請求項9に記載の装置。 - 前記アクティブコマンドを発行する前にプリアクティブコマンドを発行し、前記プリアクティブコマンド及び前記アクティブコマンドの両方に基づいてアクセスされるべきメモリの行アドレスが確定する請求項9記載の装置。
- 前記実行可能ではないことを示す情報は、前記可変レイテンシー期間の残りの期間を示す請求項9記載の装置。
- 先にアクティブ化コマンドを発行し、その後にリード又はライトコマンドを発行するコントローラと、
前記先に発行されるアクティブ化コマンド及びその後に発行されるリード又はライトコマンドを受けて、リード又はライトのメモリ動作を実行するメモリを備え、
前記メモリは、前記メモリ動作が実行可能であるかどうかを、前記アクティブ化コマンドの発行から前記リード又はライトコマンドの発行までの時間間隔が可変レイテンシー期間に含まれるかどうかで判断し、
前記メモリは、その判断結果として、実行可能であることを示す情報か実行可能でないことを示す情報を前記コントローラに提供し、
前記メモリは、実行可能であるときは、前記メモリ動作を実行し、
前記コントローラは、実行可能でないことを示す情報を受け取ったとき、前記アクティブ化コマンドを伴わない前記リード又はライトコマンドのみを再発行する、
装置。 - 前記判断は、前記アクティブ化コマンド及び前記リード又はライトコマンドの両方の発行をもって行うように構成された、
請求項13に記載の装置。 - 前記コントローラは、前記アクティブ化コマンドと前記リード又はライトコマンドとの間にチェックコマンドを発行し、
前記判断は、前記アクティブ化コマンドの発行から前記チェックコマンドの発行までの時間間隔が前記可変レイテンシー期間に含まれるかどうかで行われる、
請求項13に記載の装置。 - 前記判断結果として実行可能でないときは、
前記コントローラは、新たなチェックコマンドを更に発行し、
前記判断は、前記アクティブ化コマンドの発行から前記新たなチェックコマンドの発行までの時間間隔が前記可変レイテンシー期間に含まれるかどうかで行われる、
請求項15に記載の装置。 - 前記判断結果として実行可能であるときは、
前記コントローラは、前記リード又はライトコマンドを発行し、
前記メモリは、前記リード又はライトコマンドに基づいて前記メモリ動作を実行する、
請求項16に記載の装置。 - 前記メモリ動作が実行可能であるかどうかを、前記アクティブ化コマンドの発行から前記リードコマンドの発行までの時間間隔が可変レイテンシー期間に含まれるかどうかで判断し、
その判断結果として実行可能であるときは、
前記コントローラは、ライトコマンドを発行し、
前記メモリは、前記発行されたライトコマンドに基づいて前記メモリ動作を実行する
請求項13に記載の装置。 - 前記アクティブコマンドを受信する前にプリアクティブコマンドを受信し、前記プリアクティブコマンド及び前記アクティブコマンドの両方に基づいてアクセスされるべき行アドレスが確定する請求項13記載の装置。
- 前記実行可能でないことを示す情報は、前記可変レイテンシー期間の残りの期間を示す情報を包含する請求項13記載の装置。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/838,296 US9734097B2 (en) | 2013-03-15 | 2013-03-15 | Apparatuses and methods for variable latency memory operations |
US13/838,296 | 2013-03-15 | ||
PCT/US2014/021118 WO2014149831A1 (en) | 2013-03-15 | 2014-03-06 | Apparatuses and methods for variable latency memory operations |
Publications (2)
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JP2016514329A JP2016514329A (ja) | 2016-05-19 |
JP6123017B2 true JP6123017B2 (ja) | 2017-04-26 |
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US (3) | US9734097B2 (ja) |
EP (1) | EP2972914B1 (ja) |
JP (1) | JP6123017B2 (ja) |
KR (1) | KR101693137B1 (ja) |
CN (1) | CN104981789B (ja) |
SG (1) | SG11201505417SA (ja) |
WO (1) | WO2014149831A1 (ja) |
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US9734097B2 (en) | 2017-08-15 |
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EP2972914A1 (en) | 2016-01-20 |
CN104981789B (zh) | 2019-04-16 |
KR20150113180A (ko) | 2015-10-07 |
CN104981789A (zh) | 2015-10-14 |
US20180349302A1 (en) | 2018-12-06 |
EP2972914A4 (en) | 2016-11-30 |
EP2972914B1 (en) | 2018-10-31 |
KR101693137B1 (ko) | 2017-01-04 |
WO2014149831A1 (en) | 2014-09-25 |
SG11201505417SA (en) | 2015-09-29 |
US20140281182A1 (en) | 2014-09-18 |
US10740263B2 (en) | 2020-08-11 |
US10067890B2 (en) | 2018-09-04 |
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