CN109753013A - Novel programmable chip circuit - Google Patents
Novel programmable chip circuit Download PDFInfo
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- CN109753013A CN109753013A CN201711067133.0A CN201711067133A CN109753013A CN 109753013 A CN109753013 A CN 109753013A CN 201711067133 A CN201711067133 A CN 201711067133A CN 109753013 A CN109753013 A CN 109753013A
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Abstract
A kind of novel programmable chip circuit, it include: the inclined constant circuit of back and the inclined conditioned circuit of back, the wherein inclined constant circuit of back, it is coupled with the inclined conditioned circuit of back, it include: configuration module, overall signal's generation module and dedicated I/O module, wherein: the configuration module is suitable for download configuration file, and carries out parameter configuration；Overall signal's generation module, is suitable for generating overall signal, and the overall signal includes: global power signal, global voltage signal and global earth signal；The inclined conditioned circuit of back includes: the inclined adjustable function module of back that one or more is mutually coupled, and the inclined adjustable function module of back is suitable for generating the back number of believing one side only, and the operating mode based on the inclined adjustable function module of back described in the inclined Signal Regulation of back.The back number of believing one side only can be generated, and the operating mode of inclined adjustable function module is carried on the back based on the inclined Signal Regulation of back by carrying on the back inclined conditioned circuit using foregoing circuit.
Description
Technical field
The present embodiments relate to circuit field more particularly to a kind of novel programmable chip circuits.
Background technique
For transistor constitute programmable chip (Programmable Device, PD), when its after processing is completed, can
To carry out secondary modulation, i.e. threshold voltage adjustments to transistor threshold using different bias voltages.By threshold voltage adjustments,
High power consumption or low-power consumption Working mould can be in the operating mode of dynamic regulation programmable chip, i.e. adjusting programmable chip
Formula.
In the existing programmable chip product being made of transistor, body bias regulation technology is mostly used greatly, that is, is based on
Body silicon or insulating thick film silicon (Silico On Insulator, SOI) technique, the operating mode of dynamic regulation programmable chip.But
Be, due to the main purpose of body bias regulation technology be it is consistent with nominal value, alleviate and drawn due to technological fluctuation, photoetching error etc.
Rise systemic parameter fluctuation, therefore its adjust voltage range it is smaller, for programmable chip operating mode regulating effect compared with
Difference causes application of the programmable chip in commercial chip limited.
Summary of the invention
The technical issues of embodiment of the present invention solves be how to provide it is a kind of can be with the new of dynamic regulation chip operation mode
Type programmable chip circuit.
In order to solve the above technical problems, the embodiment of the present invention provides a kind of novel programmable chip circuit, comprising: back is partially permanent
Determine circuit and carry on the back inclined conditioned circuit, in which: the inclined constant circuit of back couples, comprising: configuration mould with the inclined conditioned circuit of back
Block, overall signal's generation module and dedicated I/O module, in which: the configuration module is suitable for download configuration file, and is joined
Number configuration；Overall signal's generation module, is suitable for generating overall signal, and the overall signal includes: global power signal, complete
Office's voltage signal and global earth signal；The inclined conditioned circuit of back includes: one or more back being mutually coupled partially can Power Regulation
Energy module, the inclined adjustable function module of back are suitable for generating the back number of believing one side only, and are based on carrying on the back described in the inclined Signal Regulation of back and partially may be used
The operating mode of conditioning function module.
Optionally, the inclined adjustable function module of back includes: that the back number of believing one side only being mutually coupled generates submodule and function
Module carries on the back the number of believing one side only suitable for generating, and based on the back number of believing one side only and the overall situation wherein the back number of believing one side only generates submodule
The operating mode of function sub-modules described in Signal Regulation.
Optionally, the inclined adjustable function module of the adjacent back shares the back number of believing one side only and generates submodule.
Optionally, it includes: generation submodule, the first control submodule and the second control that the back number of believing one side only, which generates submodule,
Submodule, in which: the generation submodule, suitable for generating the negative voltage signal opposite with the global voltage signal value, institute
Negative voltage signal, the global earth signal and the global voltage signal are stated collectively as the back number of believing one side only；First control
Module, suitable for the back bias of the NMOS tube of the function sub-modules when the function sub-modules need high-performance, is arranged as institute
Global voltage signal is stated, the back bias of the PMOS tube of the function sub-modules is the negative voltage signal, adjusts function
Module is in high power consumption operating mode；Second control submodule, suitable for when the function sub-modules need low performance, if
The back bias for setting the NMOS tube of the function sub-modules is the negative voltage signal, and the back of the PMOS tube of the function sub-modules is inclined
Pressure is the global voltage signal, adjusts the function sub-modules and is in low power mode of operation.
Optionally, the global voltage signal be it is following at least one: I/Q voltage signal, core voltage signal.
Optionally, the inclined adjustable function module of the back further include: enabled submodule is suitable for according to enable signal, open or
Person closes the back wilfully at submodule.
Optionally, the enabled submodule includes: setting submodule, is suitable for closing the back partially when the enabled submodule
Generate submodule when, the back bias of back bias and PMOS tube that the NMOS tube of the function sub-modules is set be described in globally
Signal adjusts the function sub-modules to static state and waits operating mode.
Optionally, the inclined conditioned circuit of back includes: the partially adjustable logic module of back being mutually coupled, carries on the back partially adjustable die for special purpose
Block and partially adjustable I/O module is carried on the back, wherein the partially adjustable logic module of the back, the back is partially adjustable special module and the back partially may be used
I/O module is adjusted to be independent the inclined adjustable function module of back.
Optionally, the inclined adjustable function module of back further include: identification submodule and selection submodule, in which: the knowledge
Small pin for the case module, suitable for identify objective circuit in the back number of believing one side only, and by correspondence it is identical it is described back the number of believing one side only the back
The corresponding program code of adjustable function module is placed in the identical partially adjustable logic module of back partially；The selection submodule
Block, suitable for selecting the corresponding back number of believing one side only according to the performance requirement of the inclined adjustable function module of back.
Optionally, the inclined constant circuit of back further include: setup module, suitable for the NMOS of the inclined constant circuit of back is arranged
The back bias of pipe and the back bias of PMOS tube are the global earth signal.
Compared with prior art, the technical solution of the embodiment of the present invention has the advantages that
Novel programmable chip circuit provided in an embodiment of the present invention, comprising: it carries on the back inclined constant circuit and carries on the back inclined conditioned circuit,
By carrying on the back inclined conditioned circuit, the back number of believing one side only can be generated, and the Working mould of inclined adjustable function module is carried on the back based on the inclined Signal Regulation of back
Formula realizes the dynamic regulation of programmable chip circuit operating pattern by carrying out lesser modification in existing chip architecture.
Further, using global voltage signal and global earth signal as the back number of believing one side only, it is possible to reduce non-power class signal
Generation and maintenance save hardware cost so as to reduce area shared by capacitor.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of novel programmable chip circuit provided in an embodiment of the present invention；
Fig. 2 is a kind of schematic diagram of novel programmable chip circuit board provided in an embodiment of the present invention.
Specific embodiment
In the existing programmable chip product being made of transistor, it can be compiled using body bias regulation technology dynamic regulation
The operating mode of journey chip.Since the voltage range that body bias regulation technology is adjusted is smaller, for the Working mould of programmable chip
Formula regulating effect is poor, causes application of the programmable chip in commercial chip limited.
The embodiment of the invention provides a kind of novel programmable chip circuits, comprising: carries on the back inclined constant circuit and carries on the back partially adjustable
By carrying on the back inclined conditioned circuit the back number of believing one side only can be generated, and the work of inclined adjustable function module is carried on the back based on the inclined Signal Regulation of back in circuit
Operation mode realizes the dynamic tune of programmable chip circuit operating pattern by carrying out lesser modification in existing chip architecture
Section.
It is understandable to enable above-mentioned purpose of the invention, feature and beneficial effect to become apparent, with reference to the accompanying drawing to this
The specific embodiment of invention is described in detail.
Referring to Fig. 1, the embodiment of the invention provides a kind of novel programmable chip circuits, comprising: carries on the back inclined constant circuit 10
With the inclined conditioned circuit 11 of back, in which:
The inclined constant circuit 10 of back is coupled with the inclined conditioned circuit 11 of back, may include: configuration module 101, global
Signal generation module 102 and dedicated input/output (Input/Output, I/O) module 103.The wherein configuration module 101,
Suitable for download configuration file, and carry out parameter configuration；Overall signal's generation module 102 is suitable for generating overall signal, described
Overall signal includes: global power signal, global voltage signal and global earth signal；The dedicated I/O module 103 is suitable for dedicated
Interface, such as power supply interface, high-speed interface etc..
In specific implementation, the global voltage signal may include: global I/O voltage signal VddioAnd global kernel
Voltage signal Vddc, wherein VddioAnd VddcFor global positive voltage signal.
In specific implementation, the inclined constant circuit 10 of the back can be with further include: setup module (not shown) is suitable for setting institute
Stating and carrying on the back the corresponding back number of believing one side only of the NMOS tube back number of believing one side only corresponding with PMOS tube of inclined constant circuit 10 is described globally to believe
Number.
The inclined conditioned circuit 11 of back may include: the inclined adjustable function module 111 of back, carry on the back the number of believing one side only suitable for generating
(back-gate bias voltage signal referred to as carries on the back the number of believing one side only), and based on the inclined adjustable function module 111 of back described in the inclined Signal Regulation of back
Operating mode.
In specific implementation, the inclined conditioned circuit 11 of the back can also include multiple back being mutually coupled partially can Power Regulation
Energy module 111, inclined 111 embodiment of adjustable function module of back shown in FIG. 1 are not constituted to the scope of the present invention
Limitation.
In an embodiment of the present invention, when the inclined conditioned circuit 11 of back includes multiple inclined adjustable functions of back being mutually coupled
When module 111, the inclined conditioned circuit 11 of the back may include: that the partially adjustable logic module of back being mutually coupled, back are partially adjustable dedicated
Module and the partially adjustable I/O module (not shown) of back, in which:
The partially adjustable logic module of back, which is adapted for carrying out, generates logic gate and distributing store function.
The partially adjustable special module of back is adapted for carrying out block store function.
The partially adjustable I/O module of back is adapted for carrying out the input/output function of user interface.
The partially adjustable logic module of the back, the back is partially adjustable special module and the partially adjustable I/O module of back are only
The inclined adjustable function module 111 of the vertical back.
In specific implementation, the inclined adjustable function module 111 of back may include: that the back number of believing one side only being mutually coupled generates son
Module 1110 and function sub-modules 1111, in which:
The back number of believing one side only generates submodule 1110, carries on the back the number of believing one side only suitable for generating, and based on the back number of believing one side only with it is described
Overall signal adjusts the operating mode of the function sub-modules 1111；
The function sub-modules 1111, are adapted for carrying out different programmable circuit functions, for example, input/output function, can
Programmed logic function or logic function etc..
In specific implementation, in order to preferably adjust the operating modes of the function sub-modules 1111, each back is inclined
Adjustable function module 111 may include the independent back number of believing one side only and generate submodule 1110, be used to the function
The operating mode of submodule 1111 is adjusted.
In specific implementation, in order to save hardware cost, the inclined adjustable function module 111 of the adjacent back can also be shared
One back number of believing one side only generates submodule 1110, is adjusted for the operating mode to the function sub-modules 1111.
In specific implementation, the back number of believing one side only that the back number of believing one side only generates the generation of submodule 1110 is more, to the function
Adjusting more grade of submodule 1111, but due to the generation and maintenance of non-power class signal, require bigger capacitor
Device, therefore also bring along biggish hardware cost.For example, if the back number of believing one side only is from -2V~+2V and every rank is 0.2V,
20 inclined signal paths of back are needed, area shared by capacitor will be very big.In order to reduce hardware cost, need inclined to the back
Signal generates the back number of the believing one side only number that submodule 1110 generates and is simplified.
In an embodiment of the present invention, the global voltage signal and the global earth signal can be directly used as institute
State a part of the back number of believing one side only.The back number of believing one side only generates submodule 1110, based on the global voltage signal, generate with it is described
The opposite negative voltage signal of global voltage signal value, another part as the back number of believing one side only.It is inclined by reducing the back
Signal generate submodule 1110 generate the back number of believing one side only number, the area of capacitor can be effectively reduced, thus reduce hardware at
This.
In specific implementation, the global voltage signal can for one in I/Q voltage signal, core voltage signal or
Person two.
In an embodiment of the present invention, the back number of believing one side only may include: Vddio、VgndWith-Vddio, wherein-VddioFor institute
State the back number of believing one side only generate submodule 1110, generation and VddioThe opposite negative voltage signal of value.
In an alternative embodiment of the invention, the back number of believing one side only may include: Vddc、VgndWith-Vddc, wherein-VddcFor institute
State the back number of believing one side only generate submodule 1110, generation and VddcThe opposite negative voltage signal of value.
In still another embodiment of the process, the back number of believing one side only may include: Vddio、Vgnd、Vddc、-VddioWith-Vddc,
In-VddioFor the back number of believing one side only generate submodule 1110, generation and VddioThe opposite negative voltage signal of value ,-VddcFor institute
State the back number of believing one side only generate submodule 1110, generation and VddcThe opposite negative voltage signal of value.
Due to Vddc、VgndAnd VddioIt can directly adopt, only there are two back bias voltage-VddioWith-VddcIt needs additionally to generate, therefore
The area of capacitor element can be effectively reduced, to reduce hardware cost.
In specific implementation, by inputting the different back numbers of believing one side only, the adjustable function sub-modules 1111 are in not
Same operating mode.
In specific implementation, in order to avoid the junction leakage of p- to n-, it is desirable that meet back-gate bias voltage (the n trap Back of n trap
Bias, nbb) the back-gate bias voltage (p trap Back Bias, pbb) for connecing p trap should be more than or equal to.Therefore nbb and pbb can be simultaneously
It is set as Vgnd, or setting nbb is the global voltage signal, setting pbb is that the back number of believing one side only generates the life of submodule 1110
At the negative voltage signal.
In specific implementation, it is set as V simultaneously relative to nbb and pbbgnd, nbb most just, pbb it is most negative when, to device and
The regulating effect of circuit is most strong, and the performance of the function sub-modules is at biasing of just supporting or opposing (Forward Back Bias, FBB)
It is optimal, signal delay is minimum, reaches worst in reversed back biasing (Reverse Back Bias, RBB), signal delay
Maximum, break-over of device electric current are minimum.Therefore when high performance is needed, the backgate that the NMOS tube of the function sub-modules 1111 is arranged is inclined
Voltage (the back bias of abbreviation NMOS tube) corresponding nbb is set, for the global voltage signal, the back-gate bias voltage (letter of PMOS tube
Claim the back bias of PMOS tube) pbb is corresponded to, it is the negative voltage signal；When needing low performance, the function sub-modules are set
The back bias of 1111 NMOS tube corresponds to pbb, is the negative voltage signal, and the back bias of PMOS tube corresponds to nbb, is the overall situation
Voltage signal.
In an embodiment of the present invention, it may include: to generate submodule (not show that the back number of believing one side only, which generates submodule 1110,
Out), the first control submodule (not shown) and the second control submodule (not shown), in which:
The generation submodule, it is described negative suitable for generating the negative voltage signal opposite with the global voltage signal value
Voltage signal, the global earth signal and the global voltage signal are collectively as the back number of believing one side only.
First control submodule, suitable for the function submodule is arranged when the function sub-modules need high-performance
The back bias of the NMOS tube of block is the global voltage signal, and the back bias of the PMOS tube of the function sub-modules is the negative electricity
Signal is pressed, the function sub-modules is adjusted and is in high power consumption operating mode.
Second control submodule, suitable for the function submodule is arranged when the function sub-modules need low performance
The back bias of the NMOS tube of block is the negative voltage signal, and the back bias of the PMOS tube of the function sub-modules is the global electricity
Signal is pressed, the function sub-modules is adjusted and is in low power mode of operation.
In specific implementation, the performance requirement can be divided into: high-performance and low performance, wherein high-performance corresponds to higher
Power consumption and shorter delay, low performance correspond to lower power consumption and longer delay, can also according to the grade of power consumption and delay,
It is divided into more performance requirement grades, corresponding more operating mode grades.It is understood that the performance requirement and work
Mode can also belong to the protection scope of the embodiment of the present invention as long as meaning is similar or like using other titles.
In specific implementation, since the overall power of circuit devcie is made of dynamic power consumption and quiescent dissipation, back believes one side only
Number circuit also need to consider to carry on the back consumed power consumption in inclined signal generating circuit, therefore when the functional module 1111 is in quiet
When state wait state, it is contemplated that close the back wilfully at submodule 1110, to save power consumption.
In an embodiment of the present invention, the inclined adjustable function module 111 of back can also include: enabled submodule 1112,
Suitable for turning on or off the back wilfully at submodule 1110 according to enable signal.When the enable signal is invalid, close
The back number of believing one side only generates submodule 1110, when the enable signal is effective, opens the back number of the believing one side only generation submodule 1110.
In specific implementation, it when the enable signal is invalid, closes the back number of believing one side only and generates submodule 1110, may be used also
To set V simultaneously for nbb and pbb simultaneouslygnd。
In an embodiment of the present invention, in order to save power consumption, the enabled submodule 1112 may include: setting submodule
(not shown), suitable for function is arranged when the enabled submodule 1112 closes described carry on the back wilfully into submodule 1110
The back bias of the NMOS tube of module 1111 and the back bias of PMOS tube are the global earth signal, i.e. setting nbb and pbb is
The overall situation earth signal adjusts the function sub-modules 1111 to static state and waits operating mode.
In specific implementation, the inclined adjustable function module 111 of back can also include: identification submodule (not shown) and choosing
Select submodule (not shown), in which:
The identification submodule, suitable for identifying the back number of believing one side only in objective circuit, and will the corresponding identical back
The corresponding program code of the inclined adjustable function module 111 of the back for the number of believing one side only is placed in the identical partially adjustable logic module of back
In.
The selection submodule, suitable for selecting corresponding institute according to the performance requirement of the inclined adjustable function module 111 of back
State the back number of believing one side only.
In specific implementation, institute's identification submodule and the selection submodule can be encoded real by computer language
It is existing, such as can be encoded and be realized by C Plus Plus.
The back number of believing one side only, and base can be generated by the inclined conditioned circuit of back using above-mentioned novel programmable chip circuit
The operating mode of the inclined adjustable function module of back described in the inclined Signal Regulation of back is smaller by carrying out in existing chip architecture
Modification, realize programmable chip circuit operating pattern dynamic regulation.
To more fully understand those skilled in the art and implementing the present invention, the embodiment of the invention provides it is a kind of it is novel can
The schematic diagram of chip circuit plate is programmed, as shown in Figure 2.
Referring to fig. 2, the novel programmable chip circuit board includes: overall signal's generation module and dedicated I/O module, matches
Module is set, partially adjustable logic module is carried on the back, carries on the back partially adjustable special module and the partially adjustable I/O module of back, wherein overall signal generates mould
Block and dedicated I/O module, configuration module belong to the inclined constant circuit of back, carry on the back partially adjustable logic module, back is partially adjustable special module and
It carries on the back partially adjustable I/O module and belongs to the inclined adjustable function circuit of back.
For carrying on the back partially adjustable logic module, the inclined adjustable function module of back and the partially adjustable I/O module of back, back can be generated and believe one side only
Number, and based on described inclined its operating mode of Signal Regulation of back.
Those of ordinary skill in the art will appreciate that all or part of the steps in the various methods of above-described embodiment is can
It is completed with instructing relevant hardware by program, which can be stored in a computer readable storage medium, storage
Medium may include: ROM, RAM, disk or CD etc..
Although present disclosure is as above, present invention is not limited to this.Anyone skilled in the art are not departing from this
It in the spirit and scope of invention, can make various changes or modifications, therefore protection scope of the present invention should be with claim institute
Subject to the range of restriction.
Claims (10)
1. a kind of novel programmable chip circuit characterized by comprising carry on the back inclined constant circuit and carry on the back inclined conditioned circuit, in which:
The inclined constant circuit of the back is coupled with the inclined conditioned circuit of back, comprising: configuration module, overall signal's generation module and
Dedicated I/O module, in which: the configuration module is suitable for download configuration file, and carries out parameter configuration；The overall signal is raw
At module, it is suitable for generating overall signal, the overall signal includes: global power signal, global voltage signal and globally believes
Number；
The inclined conditioned circuit of back includes: the inclined adjustable function module of back that one or more is mutually coupled, and the back is partially adjustable
Functional module is suitable for generating the back number of believing one side only, and the Working mould based on the inclined adjustable function module of back described in the inclined Signal Regulation of back
Formula.
2. novel programmable chip circuit according to claim 1, which is characterized in that the inclined adjustable function module packet of back
Include: the back number of believing one side only being mutually coupled generates submodule and function sub-modules, wherein the back number of believing one side only generates submodule, is suitable for life
At the back number of believing one side only, and based on the operating mode carried on the back the number of believing one side only and the overall signal and adjust the function sub-modules.
3. novel programmable chip circuit according to claim 2, which is characterized in that the adjacent inclined adjustable function of the back
Module shares the back number of believing one side only and generates submodule.
4. novel programmable chip circuit according to claim 2, which is characterized in that the back number of believing one side only generates submodule
It include: generation submodule, the first control submodule and the second control submodule, in which:
The generation submodule, suitable for generating the negative voltage signal opposite with the global voltage signal value, the negative voltage
Signal, the global earth signal and the global voltage signal are collectively as the back number of believing one side only；
First control submodule, suitable for the function sub-modules are arranged when the function sub-modules need high-performance
The back bias of NMOS tube is the global voltage signal, and the back bias of the PMOS tube of the function sub-modules is negative voltage letter
Number, it adjusts the function sub-modules and is in high power consumption operating mode；
Second control submodule, suitable for the function sub-modules are arranged when the function sub-modules need low performance
The back bias of NMOS tube is the negative voltage signal, and the back bias of the PMOS tube of the function sub-modules is the global voltage letter
Number, it adjusts the function sub-modules and is in low power mode of operation.
5. novel programmable chip circuit according to claim 4, which is characterized in that the overall situation voltage signal is following
At least one: I/Q voltage signal, core voltage signal.
6. novel programmable chip circuit according to claim 2, which is characterized in that the inclined adjustable function module of back is also
Include: enabled submodule, is suitable for turning on or off the back wilfully at submodule according to enable signal.
7. novel programmable chip circuit according to claim 6, which is characterized in that the enabled submodule includes: to set
Submodule is set, is suitable for that the function sub-modules are arranged when the enabled submodule closes described carry on the back wilfully into submodule
The back bias of NMOS tube and the back bias of PMOS tube are the global earth signal, adjust the function sub-modules to static state and wait
Operating mode.
8. novel programmable chip circuit according to any one of claims 1 to 7, which is characterized in that the back is partially adjustable
Circuit includes: the partially adjustable logic module of back being mutually coupled, carries on the back partially adjustable special module and the partially adjustable I/O module of back, wherein institute
It states the partially adjustable logic module of back, the back is partially adjustable special module and the partially adjustable I/O module of back and is independent the back
Inclined adjustable function module.
9. novel programmable chip circuit according to claim 8, which is characterized in that the inclined adjustable function module of back is also
It include: identification submodule and selection submodule, in which:
The identification submodule believes one side only suitable for identifying the back number of believing one side only in objective circuit, and by the identical back of correspondence
Number the corresponding program code of the inclined adjustable function module of the back be placed in the partially adjustable logic module of the identical back；
The selection submodule believes one side only suitable for the corresponding back of performance requirement selection according to the inclined adjustable function module of back
Number.
10. novel programmable chip circuit according to claim 1, which is characterized in that the inclined constant circuit of back also wraps
Include: setup module, the back bias of NMOS tube and the back bias of PMOS tube suitable for the inclined constant circuit of back is arranged are described
Global earth signal.
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| CN201711067133.0A CN109753013B (en) | 2017-11-02 | 2017-11-02 | Novel programmable chip circuit |
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| CN109753013A true CN109753013A (en) | 2019-05-14 |
| CN109753013B CN109753013B (en) | 2020-05-29 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117236254A (en) * | 2023-11-13 | 2023-12-15 | 中科芯磁科技(珠海)有限责任公司 | Configurable logic block control method, configurable logic block and storage medium |
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| CN117236254A (en) * | 2023-11-13 | 2023-12-15 | 中科芯磁科技(珠海)有限责任公司 | Configurable logic block control method, configurable logic block and storage medium |
| CN117236254B (en) * | 2023-11-13 | 2024-03-15 | 中科芯磁科技(珠海)有限责任公司 | Configurable logic block control method, configurable logic block and storage medium |
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| Publication number | Publication date |
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| CN109753013B (en) | 2020-05-29 |
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