CN201622521U - Computer with built-in network storage device - Google Patents
Computer with built-in network storage device Download PDFInfo
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- CN201622521U CN201622521U CN2009202150582U CN200920215058U CN201622521U CN 201622521 U CN201622521 U CN 201622521U CN 2009202150582 U CN2009202150582 U CN 2009202150582U CN 200920215058 U CN200920215058 U CN 200920215058U CN 201622521 U CN201622521 U CN 201622521U
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Abstract
The utility model provides a computer with a built-in network storage device, and belongs to the technical field of computers. The utility model provides a computer which comprises a computer motherboard, a centeral proceesing unit, a first memory unit, a network interface unit, a hard disk, a second processing unit and a second memory unit, wherein the second processing unit, the hard disk, the second memory unit and the network interface unit are arranged on the computer motherboard, to form a network storage device; and the second processing unit is in communication connection with the hard disk, the second memory unit and the network interface unit. The utility model extends the functions of a host computer through the built-in network storage device, so that the computer can execute the network storage task in standby, hibernation or shutdown mode; meanwhile, the builti-in network storage device can share the hard disk. Therefore, the computer has the characteristics of low cost and low power consumption.
Description
Technical field
The utility model belongs to field of computer technology, is specifically related to a kind of computing machine with built-in network storage device, relates in particular to a kind of computing machine that all can realize network storage function under " standby ", " dormancy " or " shutdown " state.
Background technology
In recent years, stochastic calculation machine technology and development of internet technology, the network application of computing machine is ubiquitous.Wherein, data download (network download is wherein a kind of task form of the network storage) becomes a kind of basic function of computing machine from the network, and usually, the computer installation of existing common hardware framework all can be realized this basic function.The main frame of realizing the computing machine of network download generally comprises: the chipset on the CPU (central processing unit) on mainboard, the mainboard (CPU), the mainboard (for example north and south bridge chip group), hard disk, internal memory, network interface card, power module, CD-ROM drive etc.Usually, the network download of computing machine is a multi job mode, for example, the user when carrying out network browsing, carry out simultaneously software upgrading download, simultaneously by software network data download such as BT.And this network download data can delay the speed of network browsing usually greatly, and therefore, the network data download was carried out in start when the user allowed Computer Processing idle usually.
Generally speaking, the duty of computing machine roughly can be divided into six kinds of states of following S0-S5:
S0 is meant the common duty of computing machine, all computer motherboards and connection device standard-sized sheet thereof, and power consumption generally can surpass 80W;
S1 is also referred to as POS (Power On Suspend, power supply is hung up), be meant that computing machine is except quitting work CPU by the cpu clock controller, other mainboard connection devices (for example hard disk, internal memory, chipset etc.) are operate as normal still, power consumption is below 30W (for example, some CPU cooling software utilizes this principle of work exactly) generally;
S2 is meant that CPU is in closed condition, and bus clock also is closed, but the equipment that all the other mainboards connect still turns round;
S3 is meant STR (Suspend to RAM, internal memory hang up), also is not to use the longest state of using of person, and STR enters operating state data before the STR to system to be stored in the internal memory and to go.Under the STR state, main circuit power still continues as the most necessary power devices such as internal memory, do not lose to guarantee data, and other equipment all is in closed condition, and the power consumption of system is extremely low.In case we press Power button (host power switch), system just is waken up, at once reading of data and return to duty before the STR from internal memory.The read or write speed of internal memory is exceedingly fast, thus we to feel to enter and leave the time that the STR state spent only be several seconds, power consumption is no more than 10W;
S4 is also referred to as STD (Suspend to Disk, hard disk hang up), and the system primary power of being meant cuts out, but hard disk is still charged and can be waken up, and information is written in the hard disk in this moment internal memory, and all parts quit work;
S5 is meant and connects power supply at interior all devices Close All, the no power consumption of computing machine itself.
In the above state, usually, S0 is a normal operating conditions; S1, S2 state are referred to as " power saving " state, rolling mouse, can wake computer up by arbitrary keyboard; The S3 state is referred to as " standby (Standby) " state; The S4 state is referred to as " dormancy (Hibernate) " or " sleep (Sleep) " state usually; The S5 state is referred to as " shutdown " state.With the network download is example, and computing machine is usually operated under the S0 state when daily execution network download, and under S3, S4 and S5 state, the computing machine of prior art is may not realize the network download task at least.Therefore, the computer user normally needs to operate in the duty of S0 when carrying out the network download of larger data.Generally speaking, the computer user is being in order to make network download not influence network speed when it uses, normally the user leave allow under the state computer run at the S0 state, allow it automatically perform network download.Like this, though active computer can better be realized network storage tasks such as network download,, have the shortcoming that operating cost height, power consumption are big, shorten the computing machine life-span.
At the above demand, proposed in the prior art a kind of network attached storage that is exclusively used in network download (Network Attached Storage, NAS).Need carrying out during network storage tasks such as this device utilization execution network download of task is simple, the less characteristics of related hardware of requirement operation, forms one with relative hardware simplicity structure (with respect to main frame) and is similar to the file server that is exclusively used in network download.NAS generally includes microprocessor, network control module, be used for the hard disk of data storage and controller thereof, load module, fixed memory module, display module etc., by with the upper module co-ordination, the user can directly be connected with network by network interface, realizes network data services.Therefore, have relative cost low (with respect to computing machine), availability height, conveniently advantage such as install and use.
Simultaneously, also propose a kind of DAS (Direct Attached Storage, direct attached storage) in the prior art, also can be described as SAS (Server-Attached Storage, server extra storage).DAS is defined as directly being connected the data storage device under various servers or the client-side extensions interface, and it depends on server, itself is piling up of hardware, does not have any storage operating system.In this mode, memory device is directly to arrive server by cable (normally scsi interface (SmallComputer System Interface, small computer system interface) cable), and I/O (input/input) request directly sends to memory device.
No matter be NAS or DAS, with respect to main frame all is a separate equipment device, along with the individual application demand of the network storage is more and more wider, the personal user better realizes network storage function, generally be not ready to spend again high price to buy NAS or DAS very much, the substitute is, normally make the main frame long-play realize the self networks storage demand in the S0 state.
Therefore, be necessary to propose a kind of main frame that also can under " standby ", " dormancy " or " shutdown " state, all can realize network storage function.
The utility model content
The technical problems to be solved in the utility model is to provide a kind of computing machine all can realize the computing machine of network storage function under " standby ", " dormancy (comprising sleep state) " or " shutdown " state.
For solving above technical matters, the utility model provides a kind of computing machine, comprises computer motherboard, CPU (central processing unit), first internal storage location, network interface unit and hard disk, and comprises:
Second processing unit, its operation power consumption is lower than CPU (central processing unit); And
Second internal storage location,
Wherein, described second processing unit, hard disk, second internal storage location, network interface unit all place computer motherboard, also make up the formation network storage device, and described network storage device is at computing machine under " standby ", " dormancy " or " shutdown " state and all is in electriferous state; Second processing unit communicates to connect with described hard disk, second internal storage location, network interface unit respectively.
According to computing machine provided by the utility model, wherein, described network storage device communicates to connect with CPU (central processing unit), first internal storage location respectively.
Preferably, under the situation of described CPU (central processing unit) operation, second processing unit does not move, and under the situation that described CPU (central processing unit) is not moved, second processing unit can move.
According to computing machine provided by the utility model, wherein, described second processing unit can be 8,16 or 32 s' microprocessor.Described second processing unit can be 8086 Series chip, micro-control unit or digital signal processor.Described second processing unit can also be the Graphics Processing Unit on the video card on the computer motherboard; It perhaps is the processing unit in the remote opening unit.
According to computing machine provided by the utility model, wherein, described hard disk is exclusively used in network storage device.Described second internal storage location by at any time all the memory bank of charged work place on the computer motherboard.Described internal storage location is the video memory on the video card on the computer motherboard.
According to computing machine provided by the utility model, wherein, this computing machine also comprises power module, and described power module is electrically connected and makes the network storage device in the computing machine under " standby ", " dormancy " or " shutdown " state to be in electriferous state at any time with external power source.
Technique effect of the present utility model is, this computing machine comprises the network storage device that is built on the computer motherboard, and this network storage device can continue by hard disk in second processing unit, second internal storage location, the computing machine and network interface unit continuation or restart network storage task when being in " standby ", " dormancy " or " shutdown " state at computing machine.Therefore this computing machine all can be realized network storage function being under " standby ", " dormancy " or " shutdown " state, has cost characteristics little, low in energy consumption.
Description of drawings
Fig. 1 is the functional module structure synoptic diagram of the computing machine that provides of the utility model;
Fig. 2 is the mainboard structure synoptic diagram of the computing machine that provides of band the utility model.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, the utility model is described in further detail below in conjunction with accompanying drawing.
In this utility model, " standby " state is meant the S3 state described in the background technology; " dormancy " state is meant the S4 state described in the background technology, and " dormancy " state also comprises usually said " sleep " state; " shutdown " state is the S5 state described in the background technology.
Figure 1 shows that the functional module structure synoptic diagram of the computing machine that the utility model provides.As shown in Figure 1, this computing machine 10 comprises and mainly comprises network storage device 200, power module 120, CPU (central processing unit) 110, first internal storage location 130 and computer motherboard (not shown) that CPU (central processing unit) 110, first internal storage location 130, network storage device 200 all place on the computer motherboard.Power module 120 can be respectively to CPU (central processing unit) 110, first internal storage location 130, network storage device 200 power supplies, be at computing machine under " standby ", " dormancy " or " shutdown " state, power module 120 all can be to network storage device 200 power supplies so that it be in electriferous state.
See also Fig. 1, network storage device 200 comprises second processing unit 210, the hard disk 220 on the computer motherboard, second internal storage location 230 on the computer motherboard and the network interface unit 240 on the computer motherboard on the computer motherboard.The network storage device 200 of this embodiment places on the computer motherboard, power module 120 power supplies by computing machine, thereby no matter computing machine is to be operated under the states such as standby, shutdown or dormancy, second processing unit 210 on the computer motherboard in the network storage device 200, the hard disk 220 on the computer motherboard, second internal storage location 230 on the computer motherboard and the network interface unit 240 on the computer motherboard can both be in electriferous state.Therefore, the power module 120 of computing machine is electrically connected with the AC power of outside at any time.CPU (central processing unit) 110 on network storage device 200 and the computer motherboard, first internal storage location 130 on the computer motherboard communicate to connect, thus can with CPU (central processing unit) 110, first internal storage location, 130 swap datas, order etc.
Continue to consult Fig. 1, the CPU (central processing unit) 110 on the computer motherboard is central processing units on the traditional computer, in the now common PC, application generally be the central processing unit of Intel Company or AMD.CPU (central processing unit) 110 on the computer motherboard is used to focus on Command Tasks such as various Video processing, system operation, has powerful data processing function, also has frequency height, characteristics that power consumption is high simultaneously.In the prior art, the personal user is when making computer operate in S0 state execution network storage function, and the processing capacity of its data command is finished by CPU (central processing unit) 110.Because computing machine CPU (central processing unit) 110 when S2, S3, S4, S5 state is uncharged, therefore, in the prior art, computing machine can not be finished the network storage (for example network download) task when S2, S3, S4, S5 state.First internal storage location 130 on the computer motherboard places on the memory bank on the computer motherboard usually, and it can be the internal memory of DDR (Double Data Rate RAM, Double Data Rate synchronous DRAM) 1, DDR2 or DDR3.In the prior art, because computing machine first internal storage location 130 when S4, S5 state is uncharged, and in the task process of the network storage, be that dependence realizes processes such as swap data with internal memory, therefore, in the prior art, can not finish the network storage (for example network download) task when S4, S5 state especially.
Continue to consult Fig. 1, second processing unit 210 on the included computer motherboard of network storage device 200 is a kind of microprocessors that are different from CPU (central processing unit) 110.Because need carrying out when carrying out network storage task of task is simple, it is not so complicated relatively that data command is handled, therefore, second processing unit 210 can be selected the lower CPU of energy consumption (CPU (central processing unit)), this also reduces the power requirement to the power module 120 of computing machine, the frequency of the CPU that power consumption is lower is common also lower, its processing frequency is to satisfy network storage task processing demands generally speaking, certainly, its size of handling frequency will satisfy the requirement of its network interface unit that communicates to connect at least.Preferably, under the situation of CPU (central processing unit) 230 operations, second processing unit 210 does not move; Under CPU (central processing unit) situation out of service, can select 210 operations of second processing unit.In this embodiment, second processing unit 210 on the computer motherboard can be 8086 Series chip, MCU (Micro Control Unit, micro-control unit), DSP (DigitalSignal Processing, digital signal processor) etc., it can be 8,16 or 32 s' microprocessor, and it also can be the processing unit of the more energy-conservation microprocessor architecture of ARM latter Marvell company.Along with the development and change of microprocessor technology, the selection of second processing unit 210 also can further be expanded.Need to prove that second processing unit 210 can be understood as at least two kinds of situations on computer motherboard: first kind, second processing unit 210 is the extra processing units that are specifically designed to the network storage that increase of computer motherboard of the prior art relatively; Second kind, second processing unit 210 be exist on the computer motherboard of the prior art, another processing unit except that CPU (central processing unit) 110, for example can be GPU (the Graphic Processing Unit on the video card on the mainboard, Graphics Processing Unit), also can be as Chinese patent application numbers 200910163355.1, Chinese patent application number 200910163356.6 (utility model titles: the processing unit in the remote opening unit computer motherboard).Communicate by letter with the webserver that sends start-up command in this remote opening unit, it is connected in one removably and is connected to power supply and responds the controlled terminal that described start-up command triggers main circuit, and provide electric power by described controlled terminal, wherein, described remote opening unit comprises a processing unit, one communication unit that connects described processing unit and communicate by letter with described controlled terminal with the described webserver, and at least one stores the storage unit of described network server address, described remote opening unit by described communication unit initiatively with described address on the webserver keep communicating by letter.
Continue to consult Fig. 1, the hard disk 220 on the computer motherboard in this embodiment network storage device 200 is to utilize the hard disk that is connected with computer motherboard of the prior art to realize the network storage of related data.In this embodiment, can comprise two hard disks on the computer motherboard, hard disk is used for the common task that computing machine carries out except that the network storage to be used, and another promptly is the hard disk 220 that is exclusively used on the computer motherboard of the network storage.Hard disk 220 on the computer motherboard is at computing machine under " standby ", " shutdown " or " dormancy " state, all can be charged by the power module 120 of computing machine.The number of hard disk 220 or capacity are not limited by the utility model.The interface type of hard disk 220 can be SATA (Serial ATA, serial ports) form, IDE (IntegratedDrive Electronic, ide) form, SCSI form or optical-fibre channel form, its physical interface type are not limited by the utility model yet.Need to prove that along with the development of computer memory technical, hard disk also can be replaced (for example, the solid state hard disc of Flash form of memory) by the memory storage of other form, the selection of hard disk 220 also can be expanded with the development of technology.
Continue to consult Fig. 1, second internal storage location 230 on the computer motherboard is for being different from first internal storage location 130 on the prior art computer motherboard, this second internal storage location 230 is at computing machine under " standby ", " shutdown " or " dormancy " state also can make it charged by the power module 120 of computing machine, therefore, under the instruction control of second processing unit 210, no matter computing machine at which kind of state, can carry out data processing work.Can by on computer motherboard, be provided with one at any time all the memory bank of charged work be exclusively used in second internal storage location 230, therefore, second internal storage location 230 also can be for being same as the hardware of first internal storage location 130, and just its memory size can be less relatively.When the network storage, usually the deposit data that needs most frequent use in the register (Register) of second processing unit 210, the relatively frequent deposit data of using in second internal storage location 230, the deposit data of use once in a while in hard disk 220.The capacity of second internal storage location 230 and number are not limited by the utility model, and it also can be the internal memory of DDR1, DDR2 or DDR3.Need to prove that along with the development of computer memory technical, internal memory also can be replaced (for example, the phase transition storage of studying) by the memory storage of other form, the selection of second internal storage location 230 also can be expanded with the development of technology.What need further specify is, second internal storage location 230 can be understood as at least two kinds of situations on computer motherboard: first kind, second internal storage location 230 is the extra storage unit that are specifically designed to the network storage that increase of computer motherboard of the prior art relatively; Second kind, second internal storage location 230 is the storage unit that existed on the computer motherboard of the prior art, as long as its retainer belt electricity condition and communicating to connect with second processing unit 210 at any time for example, can be the video memory on the video card on the mainboard.In a certain embodiment, second internal storage location 230 can communicate to connect with hard disk 220, with swap data.
Continue to consult Fig. 1, network interface unit 240 on the computer motherboard also is to be at computing machine under " standby ", " shutdown " or " dormancy " state also can make it charged by the power module 120 of computing machine, and its network service that is used for network storage process connects.Network interface unit 240 can be used the network interface card on the computer motherboard of prior art, also can independently dispose the network service of network interface card module-specific in the network storage in addition.The exchange of network data all is to realize that by network interface unit 240 network interface unit 240 outsides can be connected with the Internet.
Continue to consult Fig. 1, the network storage device 200 of the computing machine of this embodiment further can also comprise satellite interface 250, thereby can realize some basic function expansions of network storage device 200, for example, satellite interface 250 can be USB (Universal Serial Bus, USB (universal serial bus)) interface, SD (Secure Digital, safe digital) card or the like.Satellite interface 250 also can utilize the interface on the prior art computer motherboard.
Continue to consult Fig. 1, the computing machine of this embodiment also comprises common load module 350 (as keyboard, mouse etc.), display 340, and network storage device 200 can be connected with display 340, load module 350 by computer motherboard.
Figure 2 shows that the mainboard structure synoptic diagram of the computing machine that band the utility model provides.This utility model provides the network storage device in the computing machine to be built on the computer motherboard and utilizes hard disk on the computer motherboard etc. jointly, thereby the cost that increases a built-in network storage device in computing machine is fewer, and the cost of its increase is mainly used in second processing unit, second internal storage location on the computer motherboard.As shown in Figure 2, have first internal storage location 130, board chip set (Chipset) 140, PCI slot 150, hard disk slot 16 0 on the power module 120, the CPU (central processing unit) 110 on the computer motherboard, computer motherboard of computing machine on this computer motherboard 100, also comprise on this computer motherboard substantially by second processing unit 210 on the computer motherboard, the hard disk 220 on the computer motherboard, second internal storage location 230 in the computer motherboard, the network storage device that network interface unit 240 on the computer motherboard is formed.In this embodiment, second internal storage location 230 is a PCI (the Peripheral Component Interconnect that place on 150, peripheral component interconnect) on the slot, network interface unit 240 places on another PCI slot on 150, and these two PIC slots are at computing machine all can be charged under " standby ", " shutdown " or " dormancy " state; Hard disk 220 and network interface unit 240 are shared by mainboard and network storage device.The power module 120 of computing machine can be powered other each unit on mainboard, need to prove, no matter computing machine still is the S5 state at S0, S1, S2, S3, S4, the power module 120 of computing machine can make second processing unit 210, hard disk 220, second storage unit 230, network interface unit 240 be in electriferous state, in order to network storage device be at computing machine " standby ", " shutdown " or " dormancy " state can be at any time according to the instruction operation of working.Therefore, this computer motherboard not only can be handled various task work at ordinary times, can also under " standby ", " shutdown " or " dormancy " state, carry out more consuming time but the simple network storage work of task, therefore be equivalent to increase on computers the network storage device that can act on behalf of the major function of NAS.Need to prove that under the situation that the power supply that computer motherboard connected does not pull out, power module 120 has.Even if mainboard also is charged under the S5 state in fact, for example in the WOL of prior art (WOL) technology, all utilized this specific character, 95% all supports WOL in the computing machine of prior art.
Further consult shown in Figure 2, this computer motherboard 100 can also comprise battery 170, in this embodiment, battery 170 can be used for the second included processing unit 210 of network storage device, hard disk 220, second storage unit 230, network interface unit 240 power supplies are made it to be in electriferous state.
Need to prove that computer motherboard structure shown in Figure 2 is wherein a kind of just, the part shared along with network storage device and computer motherboard changes, and those skilled in the art can also make other multiple equivalents form.
Further, we make brief description to the operation of the network storage device in this embodiment computing machine.
After this network storage device is built in computing machine, this computing machine is at the start normal operating condition, certainly can realize network storage function, this computing machine is when " standby ", " shutdown " or " dormancy " state, by the operation of the network storage device on this computing machine, can continue or restart network storage functions such as network download.Know as those skilled in the art and to know that this computing machine need be applicable to the driver of network storage device; Also the principle of work with NAS is similar for mutual collaborative work principle between second processing unit 210 in the network storage device 200, hard disk 220, second storage unit 230, the network interface unit 240, for example, a database is arranged on the hard disk 220, the download task list that the user sets is deposited in the inside, during the computing machine operate as normal, the control of hard disk 220 gives CPU (central processing unit) 110 controls; When computing machine is in " standby ", " shutdown " or " dormancy " state, the control of hard disk 220 gives second processing unit 210 controls, the form that download task list can be discerned with second processing unit 210 is given second processing unit 210 and is handled, by Collaborative Control hard disk 220, second storage unit 230, network interface unit 240, begin or continue uncompleted downloading task.The system that network storage device 200 is moved can develop based on (SuSE) Linux OS.
As from the foregoing, what this utility model provided computing machine passes through built-in network storage device to the expanding of main frame function, and makes it can carry out network storage task when being in " standby ", " dormancy " or " shutdown " state.Therefore, this computing machine is realized network storage function, is had the low characteristics of cost than other increase NAS or DAS; Select to be different from second processing unit CPU (central processing unit), that energy consumption is low simultaneously, and the form of selecting second processing unit, second internal storage location, network interface unit, hard disk to build one " small computer " in mainboard is exclusively used in task network storage task simple but consuming time relatively, therefore can realize low in power consumption.
Need to prove, " parts on the computer motherboard " mentioned in the utility model be meant the parts on the circuit galley that is fixed in mainboard or be meant by pull-plug device be connected in parts on the mainboard, also or the mode by data line of being meant be connected in parts on the mainboard; " placing on the computer motherboard " of being mentioned in the utility model be meant on the circuit printed circuit board that is fixed in mainboard or be meant by pull-plug device be connected on the mainboard, also or the mode that is meant by data line be connected on the mainboard.
Under the situation that does not depart from spirit and scope of the present utility model, can also constitute many very embodiment of big difference that have.Should be appreciated that except as defined by the appended claims, the utility model is not limited at the specific embodiment described in the instructions.
Claims (9)
1. a computing machine comprises computer motherboard, CPU (central processing unit), first internal storage location, network interface unit and hard disk, it is characterized in that, also comprises:
Second processing unit, its operation power consumption is lower than CPU (central processing unit); And
Second internal storage location,
Wherein, described second processing unit, hard disk, second internal storage location, network interface unit all place computer motherboard, also make up the formation network storage device, and described network storage device is at computing machine under " standby ", " dormancy " or " shutdown " state and all is in electriferous state; Second processing unit communicates to connect with described hard disk, second internal storage location, network interface unit respectively.
2. computing machine as claimed in claim 1 is characterized in that, described network storage device communicates to connect with CPU (central processing unit), first internal storage location respectively.
3. computing machine as claimed in claim 1 or 2 is characterized in that, described second processing unit is 8,16 or 32 s' a microprocessor.
4. computing machine as claimed in claim 1 or 2 is characterized in that, described second processing unit is 8086 Series chip, micro-control unit or digital signal processor.
5. computing machine as claimed in claim 1 or 2 is characterized in that, described second processing unit is the Graphics Processing Unit on the video card on the computer motherboard; It perhaps is the processing unit in the remote opening unit.
6. computing machine as claimed in claim 1 is characterized in that described hard disk is exclusively used in network storage device.
7. computing machine as claimed in claim 1 is characterized in that, described second internal storage location by at any time all the memory bank of charged work place on the computer motherboard.
8. computing machine as claimed in claim 7 is characterized in that, described internal storage location is the video memory on the video card on the computer motherboard.
9. computing machine as claimed in claim 1, it is characterized in that, also comprise power module, described power module is electrically connected and makes the network storage device in the computing machine under " standby ", " dormancy " or " shutdown " state to be in electriferous state at any time with external power source.
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| CN2009202150582U CN201622521U (en) | 2009-12-31 | 2009-12-31 | Computer with built-in network storage device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102685429A (en) * | 2011-03-08 | 2012-09-19 | 瑞昱半导体股份有限公司 | High-definition multi-media interface unit and power supply control method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102685429A (en) * | 2011-03-08 | 2012-09-19 | 瑞昱半导体股份有限公司 | High-definition multi-media interface unit and power supply control method thereof |
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