WO2006132006A1 - メモリ制御装置及びメモリ制御方法 - Google Patents
メモリ制御装置及びメモリ制御方法 Download PDFInfo
- Publication number
- WO2006132006A1 WO2006132006A1 PCT/JP2005/023786 JP2005023786W WO2006132006A1 WO 2006132006 A1 WO2006132006 A1 WO 2006132006A1 JP 2005023786 W JP2005023786 W JP 2005023786W WO 2006132006 A1 WO2006132006 A1 WO 2006132006A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- access
- memory control
- control device
- circuit
- arbitration
- 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.)
- Ceased
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Classifications
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; 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
-
- 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
Definitions
- the present invention relates to a memory control device and a memory control method for efficiently performing memory access.
- the operating frequency of the DRAM memory cell itself has not changed, and from the user's point of view, the minimum access size to DRAM is getting larger and larger. . Therefore, there is no particular problem when transferring with a long burst length, but when transferring with a short burst length, there is a problem that the amount of invalid data transfer becomes large and the effective bandwidth decreases.
- Patent Document 1 Japanese Patent Laid-Open No. 2000-175201
- an access circuit configured to be accessible to a plurality of storage devices accesses one of the storage devices, the access circuit already accesses the other storage device. If there is an access request from a circuit, the access request of an access circuit that can access the plurality of storage devices is made to wait.
- one access circuit accesses one storage device and stores it in this one storage device. After the data to be accessed by the other access circuit is stored in the other storage device accessible by the other access circuit, the other access circuit is to access the stored data. .
- a data transfer method has the problem that it takes a very long time to handle a large amount of data.
- the storage device accessible to the access circuit is usually used for another purpose such as a local memory storing processing related to the access circuit, for data transfer between a plurality of storage devices. It is necessary to secure a separate storage area. If the storage device can not perform time division processing etc., it is necessary to take measures such as increasing the memory capacity and increasing the memory bandwidth. As described above, when the memory capacity is increased or the memory bandwidth is increased, the same measures as the number of masters are required, and as a result, the circuit area is increased.
- the arbitration circuit becomes complicated, and as a result, the circuit area and the power consumption increase. Further, in the case where there are a plurality of such access circuits, the same problem arises as the number of the access circuits.
- the present invention has been made in view of the point of force, and an object of the present invention is to improve the effective band width.
- the present invention provides at least two storage devices in which data is stored;
- At least two access means for accessing the storage device At least two access means for accessing the storage device
- the amount of invalid data transfer can be reduced for short burst length access, and an advantageous effect can be obtained in improving the effective bandwidth.
- an advantageous effect can be obtained in reducing the circuit area in which each access circuit does not have to be able to access a plurality of storage devices.
- access to each storage device can be performed in an efficient order, and the effective bandwidth of each storage device can be further improved.
- an advantageous effect can be obtained in reducing the circuit area that requires no access to a plurality of storage devices. Also in the case of considering the development of LSI, it is advantageous in reducing the circuit area, and also has an advantageous effect in shortening the start-up time and reducing the power consumption.
- FIG. 1 is a block diagram showing a configuration of a memory control device according to Embodiment 1 of the present invention.
- FIG. 2 is a block diagram showing a configuration of a conventional memory control device.
- FIG. 3 is a block diagram showing a configuration of a memory control device according to a second embodiment.
- FIG. 4 is a block diagram showing a configuration of a memory control device according to a second embodiment.
- FIG. 5 is a block diagram showing another configuration of the memory control device according to the second embodiment.
- FIG. 6 is a block diagram showing a configuration of a memory control device according to the third embodiment.
- FIG. 7 is a block diagram showing an internal configuration of the arbitration circuit according to the third embodiment.
- FIG. 8 is a block diagram showing another internal configuration of the arbitration circuit according to Embodiment 3.
- Embodiment 9 is a block diagram showing a configuration of a memory control device according to Embodiment 4. .
- FIG. 10 is a block diagram showing a configuration of a memory control device according to a fifth embodiment.
- FIG. 11 is a block diagram showing a configuration of a memory control device according to a sixth embodiment.
- FIG. 12 is a block diagram showing a configuration of a memory control device according to a seventh embodiment. Explanation of sign
- FIG. 1 is a block diagram showing a configuration of a memory control device according to Embodiment 1 of the present invention.
- reference numerals 30, 40 denote access circuits, which are each connected to the storage device 10 so as to be accessible via the arbitration circuit 20, and are each accessably connected to the storage device 11 via the arbitration circuit 21. It is done.
- FIG. 1 describes the case where two access circuits 30 and 40 are used
- Two or more access circuits may be provided. This point is the same as in the following embodiments.
- the arbitration circuits 20 and 21 arbitrate, for each of the storage devices 10 and 11, access requests to the storage devices 10 and 11 issued from the access circuits 30 and 40, respectively.
- the storage devices 10 and 11 store necessary data and read out data in response to an access request.
- the storage devices 10 and 11 include DDR2 (Double Data Rate 2). It is made.
- the bus width of the data bus 500 between the arbitration circuit 20 and the storage device 10 is 4 bytes
- the bus in the data bus 501 between the arbitration circuit 21 and the storage device 11 is If the width is 4 bytes, the minimum access unit is 4 bursts, or 16 bytes.
- FIG. 2 the configuration of a conventional memory control device is shown in FIG.
- the access circuits 30 and 40 are each connected to the storage device 12 via the arbitration circuit 22 so as to be accessible.
- the minimum access unit is 4 bursts, ie 32 bytes. It becomes.
- the unnecessary data transfer amount will be specifically examined.
- the embodiment shown in FIG. Assuming that the access circuits 30 and 40 in the memory control device 1 are circuits that perform motion compensation in the video decoding process, the access circuit 30 frequently performs 16-byte access, but if there is no page crossover in the memory, it is wasteful. Data transfer amount is 0 bytes.
- the configuration of the memory control device according to the first embodiment is as follows. A performance improvement of twice that of the conventional memory controller is seen.
- arbitration is performed when viewed from one of the access circuits. It is generally preferred that the time awaited by arbitration in circuit 20 is reduced.
- the case where a DRAM (Dynamic Random Access Memory) is used as the storage devices 10 and 11 described in the embodiment is not limited to this form. You may use static random access memory) or flash memory.
- DRAM Dynamic Random Access Memory
- the storage devices 10 and 11 may be configured with different types of memories, such as the storage device 10 is configured with a DRAM and the storage device 11 is configured with a flash memory.
- two or more forces may be exemplified as to the case where two storage devices 10 and 11 are used. Also, the bus width of the storage devices 10 and 11 does not matter.
- access circuits 30 and 40 have been described as being capable of accessing each of the storage devices 10 and 11, they may be accessible to only one of the storage devices.
- the access circuits 30 and 40 may be provided either inside or outside the LSI.
- FIG. 3 is a block diagram showing a configuration of a memory control device according to Embodiment 2 of the present invention.
- the difference from the first embodiment is that an inter-storage transfer circuit 50 is provided between the arbitration circuits 20 and 21. Therefore, the same parts as those of the first embodiment are indicated by the same reference numerals and differences from the first embodiment. I will explain only. The same applies to Embodiments 3 to 7 below.
- the access circuit 30 is connected to the storage device 10 via the arbitration circuit 20 so as to be accessible.
- the access circuit 40 is connected to the storage device 11 via the arbitration circuit 21 so as to be accessible.
- An inter-storage transfer circuit 50 for transferring data between the storage devices 10 and 11 is provided between the two arbitration circuits 20 and 21.
- the inter-storage transfer circuit 50 is instructed by the signal 1000 output from the access circuit 30 and the inter-storage transfer circuit 50 copies necessary data from the storage 10 to the storage 11. .
- the access circuit 40 accesses the data previously stored in the storage device 11 and the necessary processing is performed.
- the inter-storage transfer circuit 50 stores the data based on the signal 1001 output from the access circuit 40. Necessary data are copied from the device 11 to the storage device 10.
- FIG. 5 shows a state in which an externally accessible register 60 is connected to the inter-storage transfer circuit 50 in the memory control device shown in FIG. Necessary information such as an address is stored in the register 60, and the inter-storage transfer circuit 50 is activated based on the information stored in the register 60. .
- the access circuits 30, 40 need not be configured to access the multiple storage devices 10, 11, respectively, and the circuit area and power consumption can be reduced. It is advantageous to reduce the data size, and it is possible to copy data between storage devices.
- access circuits 30 and 40 respectively have access to the power S exemplified in the case where access to a single storage device 10 and 11 is possible and to access circuits to a plurality of storage devices. You may use.
- FIG. 6 is a block diagram showing a configuration of a memory control device according to Embodiment 3 of the present invention.
- the access circuits 30 and 40 are each connected to the storage device 10 so as to be accessible via the arbitration circuit 20, and accessible to the storage device 11 via the arbitration circuit 21 respectively. I'm connected.
- the arbitration circuit 20 When the storage device 10 is in an accessible state, the arbitration circuit 20 outputs a signal 1010 indicating the access state to the access circuits 30 and 40, respectively.
- the arbitration circuit 21 outputs a signal 1011 indicating the access state to the access circuits 30 and 40, respectively.
- the access circuits 30, 40 access the optimum storage device based on the signals 1010, 1011.
- FIG. 7 is a block diagram showing an internal configuration of the arbitration circuit 20 in the memory control device according to the third embodiment.
- access circuits 30, 40 are internally provided in the arbitration circuit 20.
- Primary storage 70 is provided to store force access requests.
- the access circuits 30, 40 can perform so-called prior issuance without waiting for the completion of data by the number of commands that can be stored in the primary storage device 70, and throughput can be improved.
- an idle information management device 71 is connected to the primary storage device 70, and while an access request from the access circuits 30, 40 is outputted to the storage device 10, the idle information management device 71 is connected. In 71, pointer information indicating the data storage state of the primary storage device 70 is output.
- the free space information management device 71 compares the pointer information with a predetermined prescribed value, and the free space information of the primary storage device 70 according to the comparison result is accessed via the signal 1010.
- the predetermined specified value to be compared is, for example, the time from when the free information is transmitted to access circuit 30 to when access circuit 30 issues an access request command and reaches arbitration circuit 20. It is preferable to set in consideration of time.
- FIG. 8 is a block diagram showing another internal configuration of the arbitration circuit 20 in the memory control device according to the third embodiment. As shown in FIG. 8, access circuit 30 is internally provided in arbitration circuit 20.
- the arbitration unit 80 arbitrates the access requests from the access circuits 30 and 40, and outputs the access request issued from the selected access circuit to the storage device 10.
- the access circuit 30 becomes accessible from the arbitration status in the arbitration unit 80, it is transmitted to the access circuit 30 via the signal 1010.
- the arbitration unit 80 outputs the signal 1010 indicating the free information to the access circuit 30, the access request issued by the access circuit 30 based on the signal 1010 is transmitted to the arbitration unit 8
- the signal 1010 indicating the free space information may be output in consideration of the time until 0 receives.
- the number of stages of the primary storage devices 72 and 73 may be any number. Also, the primary storage devices 72, 73 need not be provided for each of the access circuits 30, 40. I do not care.
- FIG. 9 is a block diagram showing a configuration of a memory control device according to Embodiment 4 of the present invention.
- the access circuit 30 is connected to the arbitration circuits 20 and 21 through the switching circuit 90, respectively. Further, the arbitration circuit 20 is connected to the storage device 10, and the arbitration circuit 21 is connected to the storage device 11. With this configuration, the access circuit 30 has an arbitration circuit 20,
- the storage devices 10 and 11 can be accessed via 21.
- the access circuit 40 is connected to the storage device 10 via the arbitration circuit 20 in an accessible manner, and is connected to the storage device 11 via the arbitration circuit 21 so as to be accessible.
- the switching circuit 90 switches the access destination of the access circuit 30 based on the setting value of the register 91 described later. Specifically, which one of the storage devices 10 and 11 should be accessed It has become possible to switch.
- a register 91 accessible from the outside is connected to the switching circuit 90.
- This register 91 stores information indicating which storage device is to be accessed.
- the access circuit 30 is configured to be able to access both of the storage devices 10 and 11, the circuit area and the power consumption tend to increase normally.
- the storage device 10 If the present invention is applied to an access circuit that only needs to be accessed, it is possible to obtain advantageous effects in reducing the circuit area and the power consumption.
- FIG. 10 is a block diagram showing a configuration of a memory control device according to Embodiment 5 of the present invention. As shown in FIG. 10, the access circuits 30 and 40 are connected to the arbitration circuit 20 via the selection circuit 100. Further, the arbitration circuit 20 is connected to the storage device 10, and the access circuits 30, 40 are connected to the storage device 10 via the arbitration circuit 20 so as to be accessible.
- the selection circuit 100 only one access request of the access circuits 30, 40 is adjusted. It is selectively output to the storage device 10 through the stop circuit 20.
- FIG. 11 is a block diagram showing a configuration of a memory control device according to Embodiment 6 of the present invention. As shown in FIG. 11, the access circuits 30, 40 are connected to the data arbitration circuits 25, 26, respectively. In addition, the data arbitration circuits 25 and 26 are connected to the storage device 10 via the selection circuit 110.
- the selection circuit 110 only one of the data output from the data arbitration circuits 25 and 26 is selectively output to the storage device 10.
- the circuit area can be reduced, and wiring congestion can be eliminated in the layout design.
- the configuration of the memory controller is advantageous in solving such problems.
- the memory control according to the first embodiment in which the circuit resources of the data arbitration circuits 25 and 26 are the same as described above although the bandwidth demand is lowered.
- the performance will be further improved because it is equivalent to the device.
- FIG. 12 is a block diagram showing a configuration of a memory control device according to Embodiment 7 of the present invention. As shown in FIG. 12, the access circuits 30 and 40 are connected to the arbitration circuits 20 and 21, respectively.
- the arbitration circuit 20 is connected to the storage device 10 via the selection circuit 110.
- the arbitration circuit 21 is connected to the storage device 11 and connected to the storage device 10 via the selection circuit 110. Further, a register 120 is connected to the arbitration circuit 21, and a signal 1030 for controlling clock oscillation or stop is outputted from the register 120 to the arbitration circuit 21.
- a register 121 is connected to the storage device 11. For example, when the storage device 11 is a DRAM, power-down or self-refreshing from the register 121 to the storage device 11 is performed.
- a signal 1031 is output which controls mode start or stop.
- the value of the registers 120 and 121 is set to put the arbitration circuit 21 in the clock stop state while storing
- the device 11 can be put into power down or self refresh mode, and power consumption can be reduced.
- the arbitration circuit 20 and the storage device 10 are in the operating state, and the instructions and data of the microcomputer etc. necessary for the recovery of the system are stored in the storage device 10, the microcontroller There is no need to deploy the instructions and data in the storage device 10 again, and the effect of shortening the activation time of the device can be obtained.
- the present invention is extremely useful and industrially applicable because it has a highly practical effect of being able to improve the effective bandwidth.
- the present invention can be applied to a network terminal that reproduces a compressed and encoded stream, a DVD recording and reproducing device, a digital television, a PDA, a cellular phone, a personal computer and the like.
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Abstract
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Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007520026A JP4693843B2 (ja) | 2005-06-09 | 2005-12-26 | メモリ制御装置及びメモリ制御方法 |
| US11/916,748 US20090235003A1 (en) | 2005-06-09 | 2005-12-26 | Memory control device and memory control method |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005-169817 | 2005-06-09 | ||
| JP2005169817 | 2005-06-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2006132006A1 true WO2006132006A1 (ja) | 2006-12-14 |
Family
ID=37498215
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2005/023786 Ceased WO2006132006A1 (ja) | 2005-06-09 | 2005-12-26 | メモリ制御装置及びメモリ制御方法 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20090235003A1 (ja) |
| JP (1) | JP4693843B2 (ja) |
| CN (1) | CN101194235A (ja) |
| WO (1) | WO2006132006A1 (ja) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013534348A (ja) * | 2010-08-31 | 2013-09-02 | クアルコム,インコーポレイテッド | マルチチャネルdramシステムにおける負荷分散方式 |
| JP2016532974A (ja) * | 2013-09-03 | 2016-10-20 | クアルコム,インコーポレイテッド | マルチチップパッケージ上の異種メモリ用の統合メモリコントローラ |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101840382B (zh) * | 2009-03-19 | 2013-03-27 | 北京普源精电科技有限公司 | 数据存储系统和数据存取方法 |
| US9396109B2 (en) * | 2013-12-27 | 2016-07-19 | Qualcomm Incorporated | Method and apparatus for DRAM spatial coalescing within a single channel |
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| JPS61256458A (ja) * | 1985-05-10 | 1986-11-14 | Hitachi Ltd | 情報転送方式 |
| JPS63175964A (ja) * | 1987-01-16 | 1988-07-20 | Hitachi Ltd | 共有メモリ |
| JPH01169565A (ja) * | 1987-12-24 | 1989-07-04 | Fujitsu Ltd | マルチプロセッサ制御方式 |
| JPH01231145A (ja) * | 1988-03-11 | 1989-09-14 | Nec Corp | 情報処理装置 |
| JP2000132503A (ja) * | 1998-10-23 | 2000-05-12 | Victor Co Of Japan Ltd | データ転送装置 |
| JP2000187615A (ja) * | 1998-12-24 | 2000-07-04 | Hitachi Ltd | スイッチ装置を有する情報処理装置 |
| JP2002500395A (ja) * | 1997-12-24 | 2002-01-08 | クリエイティブ、テクノロジー、リミテッド | 最適な多チャネル記憶制御システム |
| JP2003263363A (ja) * | 2002-03-08 | 2003-09-19 | Ricoh Co Ltd | メモリ制御回路 |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5214769A (en) * | 1987-12-24 | 1993-05-25 | Fujitsu Limited | Multiprocessor control system |
| JPH03212754A (ja) * | 1990-01-17 | 1991-09-18 | Nec Corp | メモリリクエスト制御方式 |
| US7509179B2 (en) * | 2000-08-29 | 2009-03-24 | Panasonic Corporation | Distribution system |
| KR101051506B1 (ko) * | 2002-09-30 | 2011-07-22 | 텔레폰악티에볼라겟엘엠에릭슨(펍) | 스케일러블 멀티채널 메모리 액세스를 위한 방법 및 메모리제어기 |
| JP4099039B2 (ja) * | 2002-11-15 | 2008-06-11 | 松下電器産業株式会社 | プログラム更新方法 |
-
2005
- 2005-12-26 WO PCT/JP2005/023786 patent/WO2006132006A1/ja not_active Ceased
- 2005-12-26 CN CNA2005800500463A patent/CN101194235A/zh active Pending
- 2005-12-26 US US11/916,748 patent/US20090235003A1/en not_active Abandoned
- 2005-12-26 JP JP2007520026A patent/JP4693843B2/ja not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61256458A (ja) * | 1985-05-10 | 1986-11-14 | Hitachi Ltd | 情報転送方式 |
| JPS63175964A (ja) * | 1987-01-16 | 1988-07-20 | Hitachi Ltd | 共有メモリ |
| JPH01169565A (ja) * | 1987-12-24 | 1989-07-04 | Fujitsu Ltd | マルチプロセッサ制御方式 |
| JPH01231145A (ja) * | 1988-03-11 | 1989-09-14 | Nec Corp | 情報処理装置 |
| JP2002500395A (ja) * | 1997-12-24 | 2002-01-08 | クリエイティブ、テクノロジー、リミテッド | 最適な多チャネル記憶制御システム |
| JP2000132503A (ja) * | 1998-10-23 | 2000-05-12 | Victor Co Of Japan Ltd | データ転送装置 |
| JP2000187615A (ja) * | 1998-12-24 | 2000-07-04 | Hitachi Ltd | スイッチ装置を有する情報処理装置 |
| JP2003263363A (ja) * | 2002-03-08 | 2003-09-19 | Ricoh Co Ltd | メモリ制御回路 |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013534348A (ja) * | 2010-08-31 | 2013-09-02 | クアルコム,インコーポレイテッド | マルチチャネルdramシステムにおける負荷分散方式 |
| US9268720B2 (en) | 2010-08-31 | 2016-02-23 | Qualcomm Incorporated | Load balancing scheme in multiple channel DRAM systems |
| JP2016532974A (ja) * | 2013-09-03 | 2016-10-20 | クアルコム,インコーポレイテッド | マルチチップパッケージ上の異種メモリ用の統合メモリコントローラ |
| US10185515B2 (en) | 2013-09-03 | 2019-01-22 | Qualcomm Incorporated | Unified memory controller for heterogeneous memory on a multi-chip package |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4693843B2 (ja) | 2011-06-01 |
| CN101194235A (zh) | 2008-06-04 |
| US20090235003A1 (en) | 2009-09-17 |
| JPWO2006132006A1 (ja) | 2009-01-08 |
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