CN109284238A - Enhance the method and system of eMMC interface stability - Google Patents
Enhance the method and system of eMMC interface stability Download PDFInfo
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- CN109284238A CN109284238A CN201811026572.1A CN201811026572A CN109284238A CN 109284238 A CN109284238 A CN 109284238A CN 201811026572 A CN201811026572 A CN 201811026572A CN 109284238 A CN109284238 A CN 109284238A
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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
- G06F13/10—Program control for peripheral devices
- G06F13/102—Program control for peripheral devices where the programme performs an interfacing function, e.g. device driver
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/14—Handling requests for interconnection or transfer
- G06F13/16—Handling requests for interconnection or transfer for access to memory bus
- G06F13/1668—Details of memory controller
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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
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Abstract
The invention discloses the method and system of enhancing eMMC interface stability, belong to and are related to eMMC storage control field.Enhance the method for eMMC interface stability are as follows: drive the initial position that the communication interface of described control unit is measured under resistance at described five respectively；The initial position for adjusting the communication interface keeps the communication interface valid window maximum；The corresponding valid window of five drivings resistance is compared, the corresponding driving resistance of maximum valid window is obtained, configures resistance using the driving resistance as the driving of the eMMC module.The initial position that the present invention passes through the communication interface of measure-controlling unit under different driving resistance, the initial position for adjusting the communication interface keeps communication interface valid window maximum, optimal driving is found according to maximum valid window and configures resistance, improves the purpose of eMMC interface stability to realize by using driving configuration resistance.
Description
Technical field
The present invention relates to the storage control fields eMMC (Embedded Multi Media Card), more particularly to enhancing
The method and system of eMMC interface stability.
Background technique
EMMC use unified MMC standard interface, high density NANDFlash (one kind of flash storage, inside
Using non-linear macroelement mode, provide cheap effective solution scheme for the realization of solid-state large-capacity memory) memory with
And MMC Controller (multimedia controller) is encapsulated in a BGA (Ball Grid Array, welded ball array encapsulation) chip
In.For the characteristic of Flash, interiors of products has contained Flash administrative skill, including error detector and correction, and Flash is flat
It is erasable, bad block management, the technologies such as power down protection.A clear superiority of eMMC is to be integrated with a controller in a package,
It provides standard interface and manages flash memory, so that cell phone manufacturer can be absorbed in the other parts of product development, and shortens to city
Release the time of product in field.Increase and PCB (Printed Circuit Board, printed circuit board) however as frequency are walked
The influence of line and device, the data line of eMMC and the window surplus of control line become smaller, and lead to the stability of read-write worse and worse.For
There are mainly two types of the traditional approach for solving the problems, such as this, and one is the cablings of strict control PCB, do equal length treatment as far as possible, still
The signal Length discrepancy transmitted on signal wire cannot fundamentally promote the stability of read-write；Another kind be to after debugging in
Plank carries out down conversion process, however the plank Jing Guo down conversion process and the operating mode for being suitble to high frequency, and promotion read-write is also not achieved
Stability purpose.
Summary of the invention
For the problem of existing eMMC interface stability difference, eMMC interface stabilization can be enhanced by now providing one kind and aiming at
The method of property.
The present invention provides a kind of method for enhancing eMMC interface stability, eMMC module includes that storage unit and control are single
Member, the corresponding five driving resistance of the storage unit；The method includes the following steps:
The initial position that the communication interface of described control unit is measured under resistance is driven at described five respectively；
The initial position for adjusting the communication interface keeps the communication interface valid window maximum；
The corresponding valid window of five drivings resistance is compared, it is corresponding to obtain maximum valid window
Resistance is driven, configures resistance using the driving resistance as the driving of the eMMC module.
Preferably, the initial position that the communication interface of described control unit is measured under resistance is driven at one, comprising:
Under the driving resistance, keep sampled clock signal constant；
Obtain the sampling location of each data-interface in the communication interface；
The sampling location of all data-interface overlappings is the initial position of the communication interface.
Preferably, the sampling location for obtaining each data-interface in the communication interface, comprising:
The receiving time of the data-interface each in the communication interface is adjusted one by one, it is each described to obtain
The sampling location of data-interface.
Preferably, the initial position for adjusting the communication interface keeps the communication interface valid window maximum, comprising:
The middle position of the sampling location of data-interfaces all in the communication interface is aligned；
The sampling location of the data-interface overlapping is the communication interface valid window.
The present invention also provides a kind of methods for enhancing eMMC interface stability, and eMMC module includes storage unit and control
Unit, the corresponding five driving resistance of the storage unit；The method includes the following steps:
The initial position that the communication interface of described control unit is measured under resistance is driven at described five respectively；
The corresponding initial position of five drivings resistance is compared, it is corresponding to obtain maximum initial position
Resistance is driven, configures resistance using the driving resistance as the driving of the eMMC module.
Preferably, the initial position that the communication interface of described control unit is measured under resistance is driven at one, comprising:
Under the driving resistance, keep sampled clock signal constant；
The sampling location of control interface in the communication interface is obtained, the sampling location of the control interface is described first
Beginning position.
The present invention also provides a kind of systems for enhancing eMMC interface stability, and eMMC module includes storage unit and control
Unit, the corresponding five driving resistance of the storage unit；Include:
Measuring unit, for respectively described five drive resistance under measure described control unit communication interface it is initial
Position；
Unit is adjusted, the initial position for adjusting the communication interface keeps the communication interface valid window maximum；
Acquiring unit obtains maximum for the corresponding valid window of five drivings resistance to be compared
The corresponding driving resistance of valid window configures resistance using the driving resistance as the driving of the eMMC module.
Preferably, the measuring unit drives the initial bit that the communication interface of described control unit is measured under resistance at one
When setting, for keeping sampled clock signal constant, obtaining each data-interface in the communication interface under the driving resistance
Sampling location, the sampling location of all data-interfaces overlappings is the initial position of the communication interface.
Preferably, the adjusting unit is used for the interposition of the sampling location of data-interfaces all in the communication interface
Alignment is set, the sampling location of the data-interface overlapping is the communication interface valid window.
The present invention also provides a kind of systems for enhancing eMMC interface stability, and eMMC module includes storage unit and control
Unit, the corresponding five driving resistance of the storage unit；Include:
Measuring unit, for respectively described five drive resistance under measure described control unit communication interface it is initial
Position；
Acquiring unit obtains maximum for the corresponding initial position of five drivings resistance to be compared
The corresponding driving resistance of initial position configures resistance using the driving resistance as the driving of the eMMC module.
Above-mentioned technical proposal the utility model has the advantages that
In the technical program, by the initial position of the communication interface of measure-controlling unit under different driving resistance,
The initial position for adjusting the communication interface keeps communication interface valid window maximum, and optimal drive is found according to maximum valid window
Dynamic configuration resistance improves the purpose of eMMC interface stability to realize by using driving configuration resistance.
Detailed description of the invention
Fig. 1 is a kind of flow chart of embodiment of method of enhancing eMMC interface stability of the present invention；
Fig. 2 a is a kind of schematic diagram of present invention embodiment of the sampling location of data-interface in 33 Ω；
Fig. 2 b is a kind of schematic diagram of present invention embodiment of the valid window of communication interface in 33 Ω；
Fig. 3 a is a kind of schematic diagram of present invention embodiment of the sampling location of data-interface in 40 Ω；
Fig. 3 b is a kind of schematic diagram of present invention embodiment of the valid window of communication interface in 40 Ω；
Fig. 4 a is a kind of schematic diagram of present invention embodiment of the sampling location of data-interface in 50 Ω；
Fig. 4 b is a kind of schematic diagram of present invention embodiment of the valid window of communication interface in 50 Ω；
Fig. 5 a is a kind of schematic diagram of present invention embodiment of the sampling location of data-interface in 60 Ω；
Fig. 5 b is a kind of schematic diagram of present invention embodiment of the valid window of communication interface in 60 Ω；
Fig. 6 is a kind of module map of embodiment of the system of enhancing eMMC interface stability of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art without creative labor it is obtained it is all its
His embodiment, shall fall within the protection scope of the present invention.
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
The present invention will be further explained below with reference to the attached drawings and specific examples, but not as the limitation of the invention.
As shown in Figure 1, eMMC module includes that storage is single the present invention provides a kind of method for enhancing eMMC interface stability
Member and control unit, the corresponding five driving resistance of the storage unit；The method includes the following steps:
S1. the initial position that the communication interface of described control unit is measured under resistance is driven at described five respectively；
It should be noted that eMMC unit can be used in storage unit；SOC chip (System-on- can be used in control unit
a-Chip)。
In the present embodiment, it is advised based on eMMC JEDEC (the leader standards body that solid state technology association is microelectronic industry)
Fan Zhong, defining 5 kinds of driving intensities existing for eMMC, (i.e. driving resistance, is respectively as follows: 33 Ω, 40 Ω, 50 Ω, 60 Ω, 100
Ω), therefore different driving intensities is used, tests the initial position of corresponding communication interface.
In a preferred embodiment, the initial bit that the communication interface of described control unit is measured under resistance is driven at one
It sets, comprising:
S11. under the driving resistance, keep sampled clock signal constant；
S12. the sampling location of each data-interface in the communication interface is obtained；
Further, the receiving time of the data-interface each in the communication interface is adjusted one by one, to obtain
Take the sampling location of each data-interface.
In the actual operation process, delay (delay) value that can adjust each data-interface, finds the smallest delay value
(boundary of the data-interface leftmost side) and maximum delay value (boundary of the data-interface rightmost side), middle section are exactly the number
According to the sampling location of interface.Wherein, delay value is obtained according to the delay time of unit delay multiplied by the quantity of delay.
It, can be in HS400 mode, HS200 mode, High Speed DDR52 mould at the sampling location of test data interface
It is measured under formula and High Speed SDR mode.
It should be noted that under HS400 mode when test data interface, keep DS signal (storage unit send when
Clock signal) it is constant as sampled clock signal, the length of delay of each data-interface is adjusted, one by one to obtain the sampling of data-interface
Position；Under HS200 mode, High Speed DDR52 mode and High Speed SDR mode when test data interface, protect
It is constant as sampled clock signal to hold CLK signal (clock signal that control unit is sent), adjusts each data-interface one by one
Length of delay, to obtain the sampling location of data-interface.
S13. the sampling location of all data-interface overlappings is the initial position of the communication interface.
S2. the initial position for adjusting the communication interface keeps the communication interface valid window maximum；
Further, the initial position for adjusting the communication interface keeps the communication interface valid window maximum, packet
It includes:
S21. the middle position of the sampling location of data-interfaces all in the communication interface is aligned；
S22. the sampling location of the data-interface overlapping is the communication interface valid window.
It should be noted that the region that the data line that valid window number is all data-interfaces is overlapped, because if having one
Root signal wire does not exist, and will have the case where reading failure.
In the present embodiment, after the initial position for obtaining communication interface, justified mode is taken, all data is aligned and connects
The sampling location of mouth makes valid window reach maximum, to achieve the purpose that make eMMC work more reliable and more stable.
S3. the corresponding valid window of five drivings resistance is compared, obtains maximum valid window pair
The driving resistance answered configures resistance using the driving resistance as the driving of the eMMC module.
In the present embodiment, by the initial position of the communication interface of measure-controlling unit under different driving resistance,
The initial position for adjusting the communication interface keeps communication interface valid window maximum, and optimal drive is found according to maximum valid window
Dynamic configuration resistance improves the purpose of eMMC interface stability to realize by using driving configuration resistance.
With reference to shown in Fig. 2-Fig. 5, for example and without limitation, when the work of eMMC module is in HS400 mode, in 200Mhz
In the case where test each data-interface (D0-D7) of different driving intensity (33 Ω, 40 Ω, 50 Ω, 60 Ω), then pass through
Between be aligned after, measure the corresponding valid window number of 33 Ω be 29；The corresponding valid window number of 40 Ω is 27；50 Ω are corresponding
Valid window number is 30；The corresponding valid window number of 66 Ω is 29, is compared to obtain when eMMC is in 50 Ω driving intensity,
Valid window sum is maximum, therefore 50 Ω driving intensities are the driving configuration resistance of corresponding plank.
It should be noted that valid window number, corresponding is the delay number being arranged in control unit internal register
Amount, according to the description of SOC specifications, a delay unit delay is 50 picoseconds (ps), total number that is delayed be delay quantity multiplied by
50ps.Valid window number is the region that data-interface (D0-D7) eight data lines are overlapped, because if having a signal wire not
There will be the case where reading failure.
The present invention also provides a kind of methods for enhancing eMMC interface stability, and eMMC module includes storage unit and control
Unit, the corresponding five driving resistance of the storage unit；The method includes the following steps:
A1. the initial position that the communication interface of described control unit is measured under resistance is driven at described five respectively；
A2. the corresponding initial position of five drivings resistance is compared, obtains maximum initial position pair
The driving resistance answered configures resistance using the driving resistance as the driving of the eMMC module.
In the present embodiment, by the initial position of the communication interface of measure-controlling unit under different driving resistance,
Optimal driving is found according to maximum initial position and configures resistance, is improved to realize by using driving configuration resistance
The purpose of eMMC interface stability.
In a preferred embodiment, the initial bit that the communication interface of described control unit is measured under resistance is driven at one
It sets, comprising:
Under the driving resistance, keep sampled clock signal constant；
The sampling location of control interface in the communication interface is obtained, the sampling location of the control interface is described first
Beginning position.
It, can be in HS400 mode, HS200 mode, High Speed DDR52 mould at the sampling location of testing and control interface
It is measured under formula and High Speed SDR mode.
It should be noted that in HS400 mode, HS200 mode, High Speed DDR52 mode and High Speed
Under SDR mode when testing and control interface, keep CLK signal (clock signal that control unit is sent) is constant to believe as sampling clock
Number, the sampling location of control interface is measured.
As shown in fig. 6, eMMC module includes storage the present invention also provides a kind of system for enhancing eMMC interface stability
Unit and control unit, the corresponding five driving resistance of the storage unit；Include:
Measuring unit 1, for respectively described five drive resistance under measure described control unit communication interface just
Beginning position；
Unit 2 is adjusted, the initial position for adjusting the communication interface keeps the communication interface valid window maximum；
Acquiring unit 3 obtains maximum for the corresponding valid window of five drivings resistance to be compared
The corresponding driving resistance of valid window configures resistance using the driving resistance as the driving of the eMMC module.
In the technical program, by the initial position of the communication interface of measure-controlling unit under different driving resistance,
The initial position for adjusting the communication interface keeps communication interface valid window maximum, and optimal drive is found according to maximum valid window
Dynamic configuration resistance improves the purpose of eMMC interface stability to realize by using driving configuration resistance.
In a preferred embodiment, the measuring unit 1 drives the communication that described control unit is measured under resistance at one
When the initial position of interface, for keeping sampled clock signal constant, obtaining in the communication interface under the driving resistance
The sampling location of the sampling location of each data-interface, all data-interface overlappings is the initial bit of the communication interface
It sets.
In a preferred embodiment, the adjusting unit 2 is used for the sampling of data-interfaces all in the communication interface
The middle position of position is aligned, and the sampling location of the data-interface overlapping is the communication interface valid window.
The present invention also provides a kind of systems for enhancing eMMC interface stability, and eMMC module includes storage unit and control
Unit, the corresponding five driving resistance of the storage unit；Include:
Measuring unit, for respectively described five drive resistance under measure described control unit communication interface it is initial
Position；
Acquiring unit obtains maximum for the corresponding initial position of five drivings resistance to be compared
The corresponding driving resistance of initial position configures resistance using the driving resistance as the driving of the eMMC module.
In the present embodiment, by the initial position of the communication interface of measure-controlling unit under different driving resistance,
Optimal driving is found according to maximum initial position and configures resistance, is improved to realize by using driving configuration resistance
The purpose of eMMC interface stability.
The foregoing is merely preferred embodiments of the present invention, are not intended to limit embodiments of the present invention and protection model
It encloses, to those skilled in the art, should can appreciate that all with made by description of the invention and diagramatic content
Equivalent replacement and obviously change obtained scheme, should all be included within the scope of the present invention.
Claims (10)
1. a kind of method for enhancing eMMC interface stability, eMMC module includes storage unit and control unit, and the storage is single
The corresponding five driving resistance of member；It is characterized in that, the method includes the following steps:
The initial position that the communication interface of described control unit is measured under resistance is driven at described five respectively；
The initial position for adjusting the communication interface keeps the communication interface valid window maximum；
The corresponding valid window of five drivings resistance is compared, the corresponding driving of maximum valid window is obtained
Resistance configures resistance using the driving resistance as the driving of the eMMC module.
2. the method for enhancing eMMC interface stability according to claim 1, which is characterized in that under a driving resistance
Measure the initial position of the communication interface of described control unit, comprising:
Under the driving resistance, keep sampled clock signal constant；
Obtain the sampling location of each data-interface in the communication interface；
The sampling location of all data-interface overlappings is the initial position of the communication interface.
3. the method for enhancing eMMC interface stability according to claim 2, which is characterized in that described to obtain the communication
The sampling location of each data-interface in interface, comprising:
The receiving time of the data-interface each in the communication interface is adjusted one by one, to obtain each data
The sampling location of interface.
4. the method for enhancing eMMC interface stability according to claim 2, which is characterized in that described to adjust the communication
The initial position of interface keeps the communication interface valid window maximum, comprising:
The middle position of the sampling location of data-interfaces all in the communication interface is aligned；
The sampling location of the data-interface overlapping is the communication interface valid window.
5. a kind of method for enhancing eMMC interface stability, eMMC module includes storage unit and control unit, and the storage is single
The corresponding five driving resistance of member；It is characterized in that, the method includes the following steps:
The initial position that the communication interface of described control unit is measured under resistance is driven at described five respectively；
The corresponding initial position of five drivings resistance is compared, the corresponding driving of maximum initial position is obtained
Resistance configures resistance using the driving resistance as the driving of the eMMC module.
6. the method for enhancing eMMC interface stability according to claim 5, which is characterized in that under a driving resistance
Measure the initial position of the communication interface of described control unit, comprising:
Under the driving resistance, keep sampled clock signal constant；
The sampling location of control interface in the communication interface is obtained, the sampling location of the control interface is the initial bit
It sets.
7. a kind of system for enhancing eMMC interface stability, eMMC module includes storage unit and control unit, and the storage is single
The corresponding five driving resistance of member；It is characterised by comprising:
Measuring unit, for driving the initial bit for measuring the communication interface of described control unit under resistance at described five respectively
It sets；
Unit is adjusted, the initial position for adjusting the communication interface keeps the communication interface valid window maximum；
Acquiring unit obtains maximum effective for the corresponding valid window of five drivings resistance to be compared
The corresponding driving resistance of window configures resistance using the driving resistance as the driving of the eMMC module.
8. the system of enhancing eMMC interface stability according to claim 7, which is characterized in that the measuring unit is one
When measuring the initial position of the communication interface of described control unit under a driving resistance, for keeping under the driving resistance
Sampled clock signal is constant, obtains the sampling location of each data-interface in the communication interface, all data-interface weights
Folded sampling location is the initial position of the communication interface.
9. the system of enhancing eMMC interface stability according to claim 8, which is characterized in that the adjusting unit is used for
The middle position of the sampling location of data-interfaces all in the communication interface is aligned, the sample bits of the data-interface overlapping
It sets as the communication interface valid window.
10. a kind of system for enhancing eMMC interface stability, eMMC module includes storage unit and control unit, and the storage is single
The corresponding five driving resistance of member；It is characterised by comprising:
Measuring unit, for driving the initial bit for measuring the communication interface of described control unit under resistance at described five respectively
It sets；
Acquiring unit obtains maximum initial for the corresponding initial position of five drivings resistance to be compared
The corresponding driving resistance in position configures resistance using the driving resistance as the driving of the eMMC module.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109828879A (en) * | 2019-03-01 | 2019-05-31 | 晶晨半导体(上海)股份有限公司 | Adjustment method, device, computer equipment and the storage medium of hardware device |
| WO2021031325A1 (en) * | 2019-08-22 | 2021-02-25 | 江苏华存电子科技有限公司 | Adjustment method and device for emmc to correct output/input valid window, and storage medium |
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| KR20100099529A (en) * | 2009-03-03 | 2010-09-13 | 엘지이노텍 주식회사 | Touch input device |
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| CN109828879A (en) * | 2019-03-01 | 2019-05-31 | 晶晨半导体(上海)股份有限公司 | Adjustment method, device, computer equipment and the storage medium of hardware device |
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| WO2021031325A1 (en) * | 2019-08-22 | 2021-02-25 | 江苏华存电子科技有限公司 | Adjustment method and device for emmc to correct output/input valid window, and storage medium |
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