CN101566926A - Memory access device and display using same - Google Patents
Memory access device and display using same Download PDFInfo
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- CN101566926A CN101566926A CNA2008100954974A CN200810095497A CN101566926A CN 101566926 A CN101566926 A CN 101566926A CN A2008100954974 A CNA2008100954974 A CN A2008100954974A CN 200810095497 A CN200810095497 A CN 200810095497A CN 101566926 A CN101566926 A CN 101566926A
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Abstract
The invention provides a memory access device and a display using the same. The memory access device comprises a dynamic memory, a plurality of clients and a memory management unit, wherein the dynamic memory is used for storing a plurality of storage data; the clients access the dynamic memory and all have priorities; the memory management unit respectively executes accessing operation of the clients aiming at the dynamic memory according to the priorities, in addition, at least one buffer area is built in the memory management unit and used for temporarily storing a plurality of temporary storage data which is correspondingly generated when the accessing operation is executed.
Description
Technical field
The present invention relates to a kind of memory access device, and be particularly related to a kind of memory access device and the display that uses this memory access device.
Background technology
In electronic system now, all need to utilize storer to deposit the storage data.And the bigger dynamic storage of capacity (for example dynamic RAM Dynamic Random Access Memory DRAM) then often is used.Yet the accessing operation of this dynamic storage is comparatively complicated, and, in same electronic system, need not only one usually of electronic installation (to call client in the following text) that this dynamic storage is read and write.Therefore, when a plurality of clients need to carry out access at this dynamic storage simultaneously, always need impact damper of corresponding each client configuration to assist.
Please refer to Fig. 1, Fig. 1 illustrates the synoptic diagram of the memory access device 100 in the known technology.Client 130,140 in the memory access device 100 will be carried out write operation to dynamic storage 110.Because two write operations are to carry out on a dynamic storage 110 simultaneously, so client 130,140 is about to data respectively earlier and is write in its pairing impact damper 131,141.120 of Memory Management Unit are whether detection dynamic storage 110 is idle.In case find dynamic storage during 110 free time, the data that then will be temporarily stored in impact damper 131 and the impact damper 141 write dynamic storage 110 in regular turn.
In addition, 150～180 of clients are will be by sense data in the dynamic storage 110.Identical, dynamic storage 110 also can't provide so a plurality of client sense datas simultaneously, therefore, 120 of Memory Management Unit can be when dynamic storage 110 has the free time, just reading 150～180 of clients can need the data that read in advance, and it is stored in the impact damper 151～181.When in case client 150～180 needs reading of data, just only need arrive read in its pairing impact damper 151～181 just passable.
As shown in the above description, memory access device 100 need dispose corresponding impact damper according to the quantity of client.Therefore, this known memory access device 100 has always disposed a large amount of impact dampers.And, can not resource sharing between each impact damper, make that the service efficiency of impact damper is not high, serious increase production cost.
Summary of the invention
The invention provides a kind of memory access device, with so that a plurality of client can dynamic storage of valid memory access, and increase its spendable frequency range.
The invention provides a kind of memory access device of display, make a plurality of clients in the display, can be with the frequency range of maximum, dynamic storage of access.
The invention provides a kind of memory access device, comprise dynamic storage and Memory Management Unit.Dynamic storage is in order to storing a plurality of storage data, and Memory Management Unit is coupled to dynamic storage.Wherein, Memory Management Unit has a plurality of connectivity ports, and each connectivity port is connected to clients corresponding, and priority of Memory Management Unit storage, in order to order as storage client access dynamic storage.When client is carried out access at dynamic storage, the built-in at least one buffer zone of Memory Management Unit is in order to temporary corresponding a plurality of temporal datas that produce when carrying out above-mentioned accessing operation.
In one embodiment of this invention, wherein when each client was carried out write operation at dynamic storage, temporary its data that will write of each client were to buffer zone.
In one embodiment of this invention, when each client was carried out read operation at dynamic storage, each client read Memory Management Unit and reads (pre-fetch) in advance and be stored in data in the buffer zone
In one embodiment of this invention, corresponding each client of Memory Management Unit is distributed into a plurality of sub-buffer zones to buffer zone.
Also comprise control module in one embodiment of this invention, this control module is dynamically adjusted the capacity of its pairing each sub-buffer zone according to the frequency of each client access dynamic storage and the priority of each client.
In one embodiment of this invention, the size of the memory capacity of each sub-buffer zone is inversely proportional to the priority of its each client that corresponds to.
In one embodiment of this invention, when each client was carried out write operation at dynamic storage, the temporary data that will write of each client were to its pairing sub-buffer zone.
In one embodiment of this invention, when each client was carried out read operation at dynamic storage, each client read Memory Management Unit and reads and be stored in data in the pairing sub-buffer zone of each client in advance.
In addition, the invention provides a kind of display that uses memory access device.This memory access device comprises dynamic storage and Memory Management Unit.Dynamic storage is in order to storing a plurality of storage data, and Memory Management Unit is coupled to dynamic storage.Wherein, Memory Management Unit has a plurality of connectivity ports, and each connectivity port is connected to clients corresponding, and priority of Memory Management Unit storage, in order to order as storage client access dynamic storage.When client is carried out access at dynamic storage, the built-in at least one buffer zone of Memory Management Unit is in order to temporary corresponding a plurality of temporal datas that produce when carrying out above-mentioned accessing operation.
In one embodiment of this invention, described client comprises display, capturing images device, direct memory access (DMA) device, 3 dimension space comb filter, direct memory access (DMA) device, deinterlacer and the device of overdriving.
The present invention is because of adopting the structure of the built-in buffer zone of Memory Management Unit, make a plurality of clients to can be stored in buffer zone to the data that same dynamic storage is read and write in advance, in the distribution of foundation frequency range and priority, reach the function of a dynamic storage of a plurality of clients access simultaneously.Therefore need not bring in exclusive impact damper of configuration, effectively reduce circuit area at each client.
For above-mentioned feature and advantage of the present invention can be become apparent, preferred embodiment cited below particularly, and conjunction with figs. are described in detail below.
Description of drawings
Fig. 1 illustrates the synoptic diagram of the memory access device 100 in the known technology.
Fig. 2 illustrates an embodiment of memory access device of the present invention.
Fig. 3 illustrates an implementation method of the buffer configuration of one embodiment of the invention.
Fig. 4 illustrates the synoptic diagram of an implementation method of adjusting buffer zone.
Fig. 5 illustrates an embodiment of the memory access device of display of the present invention.
[main element symbol description]
100,200,500: memory access device
110,210,510: dynamic storage
120,220,520: Memory Management Unit
130～180,231～236,331～336,431～436: client
131～181: impact damper
240: control module
221,321: buffer zone
3211～3216,4311～4316: sub-buffer zone
531:3 dimension space comb filter
532,536: display
533,537: the direct memory access (DMA) device
534,538: the device of overdriving
535,539: deinterlacer
Embodiment
Below will propose a plurality of embodiment and be illustrated, and assistant is understood better in the hope of those skilled in the art, and can be implemented according to this with diagram at memory access device of the present invention.
Please earlier with reference to Fig. 2, Fig. 2 illustrates an embodiment of memory access device of the present invention.Memory access device 200 comprises dynamic storage 210, Memory Management Unit 220, client 231～236 and control module 240.Dynamic storage 210 provides client 231～236 in order to the storage data, then is Memory Management Unit 220 to what this dynamic storage 210 carried out actual accessing operation.
Memory Management Unit 220 has a plurality of connectivity ports, and each connectivity port is connected respectively to clients corresponding 231～236.And Memory Management Unit 220 has a buffer zone 221 in also, 221 of this buffer zones provide 231～236 pairs of dynamic storagies 210 of client read or write fashionable, the corresponding temporal data that produces when being temporarily stored in these accessing operations.In that write operations are example to dynamic storage 210 row, if when carrying out write operation, the state of dynamic storage 210 is when busy with client 231,232, and the write operation of client 231,232 can't be performed immediately.Therefore, client 231,232 data that will write can be temporarily stored in the buffer zone 221.Memory Management Unit 220 can wait until that the value that will be temporarily stored in again in the buffer zone 221 write to dynamic storage 210 when dynamic storage 210 left unused.
In addition, Memory Management Unit 220 also can with client 233,234,235, the 236 required data that read, be read out in the buffer zone 221 by dynamic storage 210 when dynamic storage 210 leaves unused in advance.In case during the data that client 233,234,235,236 need read in the dynamic storage 210, just as long as to buffer zone 221, capture.
What deserves to be mentioned is that Memory Management Unit 220 is to carry out according to a priority that is stored in the Memory Management Unit 220 in the execution of these operations of arranging above-mentioned explanation.Here the priority that refers to is that the importance according to client 231～236 decides.Certainly, in the priority, the desired accessing operation of client that degree of priority is higher will more preferentially be performed.For instance, when client 231 and client 232 all will write data to dynamic storage 210, the data that store will be write buffer zone 221.In case and Memory Management Unit 220 is when finding that dynamic storage 210 is idle, the data of client 231 that will priority is higher (priority of supposing client 231 the is higher than client 232) buffer zone that is temporarily stored in 221 write dynamic storage 210 in advance.Then, row writes the data that client 232 is temporarily stored in buffer zone 221 again.
In addition, the buffer zone in the Memory Management Unit 220 also can not have only one.Also can go out two or more buffer zones, provide as using according to the demand planning of reading with the different client that writes.
In order to make the more efficient and orderliness more of the operation that is temporarily stored in the buffer zone 221; buffer zone 221 can corresponding client 231～236 be distinguished into a plurality of sub-buffer zones (this figure does not illustrate) usually; and control module 240 is coupled to client 231～236 and memory control unit 220, then is the size that is used for adjusting this a little buffer zone.The operation that it is detailed then sees also the following description.
Below please refer to Fig. 3, Fig. 3 illustrates an implementation method of the buffer configuration of one embodiment of the invention.Buffer zone 321 corresponding clients 331,332,333,334,335 and 336 wherein are assigned with out 6 sub-buffer zones 3211,3212,3213,3214,3215 and 3216.Corresponding above-mentioned explanation about Fig. 2 embodiment, when client 331 will be carried out write operation to dynamic storage, and its data that will store are temporarily stored in the operation of buffer zone earlier, exactly with its data that will store, be temporarily stored in its pairing sub-buffer zone 3211 (identical, when client 332 will be carried out write operation to dynamic storage, the temporary data that will store were in its pairing sub-buffer zone 3212).
Because client 331～336 is not quite similar for the demand of data in the dynamic storage 310, therefore, the memory capacity that corresponds to the sub-buffer zone 3211～3216 of client also should dynamically be adjusted.And control module 340 is exactly to be used for dynamically adjusting the memory capacity of this a little buffer zone 3211～3216.Control module 340 is used for judging that it then is priority by this client that client needs the size of corresponding sub-buffer zone, and the frequency that this client is read and write at dynamic storage 310 decides.
Because Memory Management Unit 320 can be handled at the data of the client that higher priority order is arranged.Therefore, the sub-buffer zone that corresponds to the client of higher priority can not accumulated usually too many untreated data are arranged.In other words, this client that higher priority is arranged does not need the corresponding big sub-buffer zone that uses.Opposite, if the lower client of priority then must have the sub-buffer zone (priority becomes inverse correlation with sub-buffer stores capacity) of bigger correspondence.In addition, the frequency read and write for dynamic storage 310 of client also is the key factor of its pairing sub-buffer size of decision.The client conspicuous, that the frequency of reading and writing is high is the essential bigger sub-buffer zone that uses.Certainly, the client that the frequency of reading and writing is low then only need be used less sub-buffer zone.
Below give one example the dynamic adjustment operation of buffer zone is described.Dynamically adjust the implementation method of sub-buffer size in the hope of explanation that can be more careful.
Please refer to Fig. 4, Fig. 4 illustrates the synoptic diagram of an implementation method of adjusting buffer zone.The buffer zone of Memory Management Unit 420 wherein corresponds to client 431,432,433,434,435 and 436 and be divided into sub-buffer zone 4311,4312,4313,4314,4315 and 4316 respectively.In this implementation method, the priority of client 431 is higher than the priority of client 432, and therefore the capacity of sub-buffer zone 4311 is less than the capacity of sub-buffer zone 4312.In addition, the priority relation of client 433～436 is that client 433 is preferential in regular turn, secondly be respectively client 434, client 435 and last client 436, so capacity of sub-buffer zone 4313～4316, being sub-buffer zone 4316 to the maximum secondly, then is sub-buffer zone 4315, sub-buffer zone 4314 and minimum sub-buffer zone 4313.
Certainly, the amount of capacity of the sub-buffer zone of above-mentioned explanation relation can also operation according to the actual storage access device on, client adjusts to the frequency of access of dynamic storage.And the priority between each client can be adjusted in the operating process of memory access device too, that is to say, this a little buffer zone can dynamic flexible adjustment, with the maximum effect of performance buffer zone.
With the next Fig. 5 that please refer to, Fig. 5 illustrates the embodiment of the memory access device of display of the present invention.The memory access device 500 of display comprises dynamic storage 510, Memory Management Unit 520, control module 540 and a plurality of client.And Memory Management Unit 520 has buffer zone 521.In the present embodiment, client is respectively dynamic storage is carried out 3 dimension space comb filter 531, display 532, the direct memory access (DMA) device 533 of write operation, overdrive device 534 and deinterlacer 535.In addition dynamic storage is carried out display 536, the direct memory access (DMA) device 537 of read operation, overdrive device 538 and deinterlacer 539 (will be considered as two different clients, for example display 532 and display 536 at the identical electronic installation that dynamic storage writes and reads in the present embodiment).
And about the operating aspect of the memory access device 500 of display, then similar with the memory access device 200 of above-mentioned explanation, those skilled in the art should analogize and understand, and then no longer add numerous stating herein.
And under the framework of the memory access device of above-mentioned display, with high-res TV (HighDefinition Television, HDTV) be example, suppose to have 3 clients, (for example two input ends are all the 1080p signal source under a certain application, output terminal is the 1080p panel), the frequency of these 3 required access datas of client respectively is 200 a megabits/per second (Mb/s), and the access of dynamic storage needs 0.5 second stand-by period.Under the situation of the memory access device stable operation of display, the frequency range of supposing dynamic storage is 750 megabits/per second (Mb/s), and then 3 needed sub-buffer zones of client are 1500 megabits (Mb).Also therefore, the size of needed buffer zone is 1500 megabits (Mb) three times, just 4500 megabits (Mb), and the service efficiency of dynamic storage is 600/750*100%=80% at this moment.
With known technology, three independently buffer zones each 1500 megabits (Mb) have been designed, (for example two input ends are all 720p when Another Application takes place, output terminal is the 1440p panel), the frequency of these 3 required access datas of client respectively is 100 a megabits/per second (Mb/s), 100 megabits/per second (Mb/s), and 400 megabits/per second (Mb/s), then under the restriction of hardware (three independently buffer zone each 1500 megabits), the frequency range of dynamic storage need reach 794 megabits/per second (Mb/s) just can accurate work (this moment, the 720p client respectively needed 1228Mb, and the 1440p client needs 1500Mb).This moment, the frequency range service efficiency of dynamic storage dropped to 600/794*100%=75.6%.
When using the present invention, buffer zone is managed concentratedly, according to needing the dynamic assignment resource, then be applied in (two input ends are all 720p, and output terminal is the 1440p panel) in the example, still can reach the frequency range service efficiency of the dynamic storage of 600/750*100%=80%, this moment, required buffer zone 720p client respectively needed 1000Mb, and the 1440p client needs 2000Mb, altogether 4000Mb, can be less than previous application (two input ends are all the 1080p signal source, and output terminal is the 1080p panel).
In sum, build the buffer zone in the Memory Management Unit in the present invention utilizes in, make a plurality of user sides can dynamic storage of access.And utilize the amount of capacity of dynamically adjusting each sub-buffer zone in the buffer zone, the effective utilization of buffer zone is promoted, and make that the access of storer is more efficient.And, do not need the impact damper of plug-in corresponding client, also reduced production cost simultaneously.
Though the present invention with preferred embodiment openly as above; right its is not in order to qualification the present invention, those skilled in the art, without departing from the spirit and scope of the present invention; when can doing a little change and retouching, so protection scope of the present invention is as the criterion when looking the appended claims person of defining.
Claims (17)
1. memory access device comprises:
One dynamic storage is in order to store a plurality of storage data; And
One Memory Management Unit, be coupled to this dynamic storage, wherein this Memory Management Unit has a plurality of connectivity ports, each this connectivity port is connected to clients corresponding, and this Memory Management Unit is stored a priority, in order to store the order of these these dynamic storagies of client access, wherein work as these clients and carry out access at this dynamic storage, the corresponding a plurality of temporal datas that produce when the built-in at least one buffer zone of this Memory Management Unit, this buffer zone are carried out these accessing operations in order to keep in.
2. memory access device as claimed in claim 1, wherein when respectively this client was carried out write operation at this dynamic storage, respectively the temporary data that will write of this client were to this buffer zone.
3. memory access device as claimed in claim 1, wherein when respectively this client is carried out read operation at this dynamic storage, respectively this client reads this Memory Management Unit and reads and be stored in data in this buffer zone in advance.
4. memory access device as claimed in claim 1, wherein this Memory Management Unit correspondence this client respectively distributes a plurality of sub-buffer zones to this buffer zone.
5. memory access device as claimed in claim 4, wherein also comprise a control module, be coupled to these clients and this memory control unit, this control module foundation is frequency and this priority of this this dynamic storage of client access respectively, dynamically adjusts the capacity of its pairing respectively this sub-buffer zone.
6. memory access device as claimed in claim 4, the size of the memory capacity of this sub-buffer zone respectively wherein, anti-phase about the degree of priority of this priority that this client corresponds to respectively.
7. memory access device as claimed in claim 4, wherein when respectively this client was carried out write operation at this dynamic storage, respectively the temporary data that will write of this client were to its pairing this sub-buffer zone.
8. memory access device as claimed in claim 4, wherein when respectively this client is carried out read operation at this dynamic storage, respectively this client reads this Memory Management Unit and reads and be stored in data in pairing this sub-buffer zone of this client respectively in advance.
9. a display uses memory access device storage video data, and wherein this memory access device comprises:
One dynamic storage is in order to store a plurality of storage data;
One Memory Management Unit, be coupled to this dynamic storage, wherein this Memory Management Unit has a plurality of connectivity ports, each this connectivity port is connected to clients corresponding, and this Memory Management Unit is stored a priority, in order to store the order of these these dynamic storagies of client access, wherein work as these clients and carry out access at this dynamic storage, the corresponding a plurality of temporal datas that produce when the built-in at least one buffer zone of this Memory Management Unit, this buffer zone are carried out these accessing operations in order to keep in.
10. display as claimed in claim 9, wherein when respectively this client was carried out write operation at this dynamic storage, respectively the temporary data that will write of this client were to this buffer zone.
11. display as claimed in claim 9, wherein when respectively this client is carried out read operation at this dynamic storage, respectively this client reads this Memory Management Unit and reads and be stored in data in this buffer zone in advance.
12. display as claimed in claim 9, wherein this Memory Management Unit correspondence this client respectively distributes a plurality of sub-buffer zones to this buffer zone.
13. display as claimed in claim 12 wherein also comprises a control module, this control module foundation is frequency and this priority of this this dynamic storage of client access respectively, dynamically adjusts the capacity of its pairing respectively this sub-buffer zone.
14. display as claimed in claim 12, the size of the memory capacity of this sub-buffer zone respectively wherein, anti-phase about the degree of priority of this priority that this client corresponds to respectively.
15. display as claimed in claim 12, wherein when respectively this client was carried out write operation at this dynamic storage, respectively the temporary data that will write of this client were to its pairing this sub-buffer zone.
16. display as claimed in claim 12, wherein when respectively this client is carried out read operation at this dynamic storage, respectively this client reads this Memory Management Unit and reads and be stored in data in pairing this sub-buffer zone of this client respectively in advance.
17. display as claimed in claim 8, wherein these clients comprise display, capturing images device, direct memory access (DMA) device, 3 dimension space comb filter, direct memory access (DMA) device, deinterlacer and the device of overdriving.
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| CN2008100954974A CN101566926B (en) | 2008-04-24 | 2008-04-24 | Memory access device and display using same |
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| CN2008100954974A CN101566926B (en) | 2008-04-24 | 2008-04-24 | Memory access device and display using same |
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| CN101566926B CN101566926B (en) | 2011-06-22 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102196252A (en) * | 2010-03-12 | 2011-09-21 | 联咏科技股份有限公司 | Memory control system and method |
| CN106997275A (en) * | 2016-01-26 | 2017-08-01 | 南宁富桂精密工业有限公司 | Buffer memory management method and the electronic installation using this method |
| CN108027637A (en) * | 2015-09-18 | 2018-05-11 | 高通股份有限公司 | System and method for carrying out control memory frequency using feedforward compression statistics |
| CN114185493A (en) * | 2022-02-15 | 2022-03-15 | 烟台市地理信息中心 | Method for dividing and storing surveying and mapping data |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5541919A (en) * | 1994-12-19 | 1996-07-30 | Motorola, Inc. | Multimedia multiplexing device and method using dynamic packet segmentation |
| EP1698976A1 (en) * | 2005-03-03 | 2006-09-06 | Siemens Aktiengesellschaft | Priority-sensitive reallocation of buffer space |
-
2008
- 2008-04-24 CN CN2008100954974A patent/CN101566926B/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102196252A (en) * | 2010-03-12 | 2011-09-21 | 联咏科技股份有限公司 | Memory control system and method |
| CN108027637A (en) * | 2015-09-18 | 2018-05-11 | 高通股份有限公司 | System and method for carrying out control memory frequency using feedforward compression statistics |
| CN106997275A (en) * | 2016-01-26 | 2017-08-01 | 南宁富桂精密工业有限公司 | Buffer memory management method and the electronic installation using this method |
| CN106997275B (en) * | 2016-01-26 | 2019-09-03 | 南宁富桂精密工业有限公司 | Buffer memory management method and the electronic device for using this method |
| CN114185493A (en) * | 2022-02-15 | 2022-03-15 | 烟台市地理信息中心 | Method for dividing and storing surveying and mapping data |
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| Publication number | Publication date |
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| CN101566926B (en) | 2011-06-22 |
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