JP5363252B2 - 半導体集積回路 - Google Patents
半導体集積回路 Download PDFInfo
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- JP5363252B2 JP5363252B2 JP2009207627A JP2009207627A JP5363252B2 JP 5363252 B2 JP5363252 B2 JP 5363252B2 JP 2009207627 A JP2009207627 A JP 2009207627A JP 2009207627 A JP2009207627 A JP 2009207627A JP 5363252 B2 JP5363252 B2 JP 5363252B2
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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
- G06F13/38—Information transfer, e.g. on bus
- G06F13/40—Bus structure
- G06F13/4063—Device-to-bus coupling
- G06F13/4068—Electrical coupling
- G06F13/4072—Drivers or receivers
-
- 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
- G11C11/4063—Auxiliary circuits, e.g. for addressing, decoding, driving, writing, sensing or timing
- G11C11/407—Auxiliary circuits, e.g. for addressing, decoding, driving, writing, sensing or timing for memory cells of the field-effect type
- G11C11/409—Read-write [R-W] circuits
- G11C11/4093—Input/output [I/O] data interface arrangements, e.g. data buffers
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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
- G11C11/4063—Auxiliary circuits, e.g. for addressing, decoding, driving, writing, sensing or timing
- G11C11/407—Auxiliary circuits, e.g. for addressing, decoding, driving, writing, sensing or timing for memory cells of the field-effect type
- G11C11/409—Read-write [R-W] circuits
- G11C11/4096—Input/output [I/O] data management or control circuits, e.g. reading or writing circuits, I/O drivers or bit-line switches
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- 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
- G11C7/1006—Data managing, e.g. manipulating data before writing or reading out, data bus switches or control circuits therefor
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- 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
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- 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
- G11C7/1057—Data output buffers, e.g. comprising level conversion circuits, circuits for adapting load
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- 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
- G11C7/1066—Output synchronization
-
- 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
- G11C7/1078—Data input circuits, e.g. write amplifiers, data input buffers, data input registers, data input level conversion circuits
-
- 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
- G11C7/1078—Data input circuits, e.g. write amplifiers, data input buffers, data input registers, data input level conversion circuits
- G11C7/1084—Data input buffers, e.g. comprising level conversion circuits, circuits for adapting load
-
- 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
- G11C7/1078—Data input circuits, e.g. write amplifiers, data input buffers, data input registers, data input level conversion circuits
- G11C7/1093—Input synchronization
-
- 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
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
- H03K19/0005—Modifications of input or output impedance
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2213/00—Indexing scheme relating to interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F2213/0038—System on Chip
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
Description
本発明の実施の形態1について図面を参照して説明する。なお本発明は、複数の信号線を介してパラレルに送信データを送信するデータ送信回路と、送信データを受信するデータ受信回路と、を備え、制御信号によってデータ送信回路からのデータ送信が制御される回路に対して適用可能である。本実施の形態では、SoC(System On Chip)回路とSDRAM(Synchronous Dynamic Random Access Memory)回路とを備え、両回路間で双方向にデータ転送が行われる信号線(以下、単に双方向用信号線と称す)を介してデータ転送が行われる場合を例に説明する。
100 SoC回路
101 SDRAM回路
200 制御信号
201 外部端子
202 バッファ
203 データ出力回路
204 ターミネーション回路
205 制御回路
206 インバータ
207 抵抗
208 抵抗
209 スイッチ
210 スイッチ
230 制御信号
231 制御信号
251 NAND回路
252 AND回路
253 トランジスタ
254 トランジスタ
255 インバータ
256 データ選択回路
257 レジスタ
258 セレクタ
Claims (9)
- 複数の信号線を介して、パラレルに送信データを送信するとともに、前記送信データに対応しかつ前記送信データに同期したストローブ信号を送信する、データ送信回路を備え、
前記データ送信回路は、
前記各信号線に対して設けられ、前記送信データを出力するためのデータ送信モードと、出力をハイインピーダンスにするためのハイインピーダンスモードと、が切り替わる複数のデータ出力回路と、
前記各データ出力回路に対して、前記送信データと予め設定された固定データとのいずれかを選択して出力するデータ選択回路と、
前記各データ出力回路が、前記ハイインピーダンスモードから前記データ送信モードへモードが切り替わってから前記送信データの出力を開始するまでの間、前記固定データを出力するように制御する制御回路と、を備えた半導体集積回路。 - 前記データ選択回路は、
前記固定データを記憶するレジスタと、
前記レジスタに記憶された前記固定データと、前記送信データと、の何れかを、前記制御回路から出力された制御信号に基づいて選択し出力するセレクタと、を備えた、請求項1に記載の半導体集積回路。 - 前記制御回路は、前記各データ出力回路のモードを前記ハイインピーダンスモード及び前記データ送信モードの何れかに切り替える、請求項1又は2に記載の半導体集積回路。
- 前記制御回路は、前記データ送信回路が前記送信データの送信を行う場合、前記各データ出力回路のモードを前記データ送信モードに切り替え、前記データ送信回路が前記送信データの送信を行わない場合、前記各データ出力回路のモードを前記ハイインピーダンスモードに切り替える、請求項1〜3の何れか一項に記載の半導体集積回路。
- 前記データ送信回路は、前記複数の信号線上にそれぞれ設けられた複数の外部端子をさらに備え、
前記制御回路は、前記複数の外部端子のそれぞれに対し、隣接する外部端子とは異なる電位の前記固定データを出力するように制御する、請求項1〜4の何れか一項に記載の半導体集積回路。 - 前記各データ出力回路は、
PチャネルMOSトランジスタ及びNチャネルMOSトランジスタによって構成されるインバータを有し、
前記PチャネルMOSトランジスタ及び前記NチャネルMOSトランジスタは、前記ハイインピーダンスモードの場合、何れもオフし、前記データ送信モードの場合、前記送信データ及び前記固定データの何れかに基づいて何れか一方がオン、他方がオフする、請求項1〜5の何れか一項に記載の半導体集積回路。 - 前記送信データを受信するデータ受信回路をさらに備えた請求項1〜6の何れか一項に記載の半導体集積回路。
- 前記データ受信回路は、前記ストローブ信号に同期して前記送信データを受信する、請求項7に記載の半導体集積回路。
- 前記データ送信回路は、データ送信のコマンドを出力した後に、前記送信データ及び前記ストローブ信号を送信する、請求項1〜8の何れか一項に記載の半導体集積回路。
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2009207627A JP5363252B2 (ja) | 2009-09-09 | 2009-09-09 | 半導体集積回路 |
US12/876,793 US7999572B2 (en) | 2009-09-09 | 2010-09-07 | Semiconductor integrated circuit |
CN201410583551.5A CN104375970B (zh) | 2009-09-09 | 2010-09-09 | 半导体集成电路 |
CN201010282293.9A CN102024493B (zh) | 2009-09-09 | 2010-09-09 | 半导体集成电路 |
US13/172,199 US8653851B2 (en) | 2009-09-09 | 2011-06-29 | Semiconductor integrated circuit |
US14/148,135 US8907699B2 (en) | 2009-09-09 | 2014-01-06 | Semiconductor integrated circuit |
US14/537,452 US9171592B2 (en) | 2009-09-09 | 2014-11-10 | Semiconductor integrate circuit |
US14/859,942 US20160012878A1 (en) | 2009-09-09 | 2015-09-21 | Semiconductor integrated circuit |
Applications Claiming Priority (1)
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JP2009207627A JP5363252B2 (ja) | 2009-09-09 | 2009-09-09 | 半導体集積回路 |
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JP2013184009A Division JP5588053B2 (ja) | 2013-09-05 | 2013-09-05 | 半導体集積回路 |
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JP2011061393A JP2011061393A (ja) | 2011-03-24 |
JP2011061393A5 JP2011061393A5 (ja) | 2012-04-05 |
JP5363252B2 true JP5363252B2 (ja) | 2013-12-11 |
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US (5) | US7999572B2 (ja) |
JP (1) | JP5363252B2 (ja) |
CN (2) | CN104375970B (ja) |
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JP5346259B2 (ja) | 2009-09-08 | 2013-11-20 | ルネサスエレクトロニクス株式会社 | 半導体集積回路 |
JP5390310B2 (ja) | 2009-09-08 | 2014-01-15 | ルネサスエレクトロニクス株式会社 | 半導体集積回路 |
JP5363252B2 (ja) * | 2009-09-09 | 2013-12-11 | ルネサスエレクトロニクス株式会社 | 半導体集積回路 |
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2009
- 2009-09-09 JP JP2009207627A patent/JP5363252B2/ja active Active
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2010
- 2010-09-07 US US12/876,793 patent/US7999572B2/en active Active
- 2010-09-09 CN CN201410583551.5A patent/CN104375970B/zh active Active
- 2010-09-09 CN CN201010282293.9A patent/CN102024493B/zh active Active
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2011
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2014
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Also Published As
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JP2011061393A (ja) | 2011-03-24 |
US20110255354A1 (en) | 2011-10-20 |
CN102024493B (zh) | 2014-12-03 |
US8907699B2 (en) | 2014-12-09 |
US7999572B2 (en) | 2011-08-16 |
CN102024493A (zh) | 2011-04-20 |
US20160012878A1 (en) | 2016-01-14 |
US20140119142A1 (en) | 2014-05-01 |
CN104375970B (zh) | 2017-08-29 |
US9171592B2 (en) | 2015-10-27 |
US20150055398A1 (en) | 2015-02-26 |
CN104375970A (zh) | 2015-02-25 |
US8653851B2 (en) | 2014-02-18 |
US20110057722A1 (en) | 2011-03-10 |
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