CN101853062B - Server - Google Patents
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- CN101853062B CN101853062B CN2009101292650A CN200910129265A CN101853062B CN 101853062 B CN101853062 B CN 101853062B CN 2009101292650 A CN2009101292650 A CN 2009101292650A CN 200910129265 A CN200910129265 A CN 200910129265A CN 101853062 B CN101853062 B CN 101853062B
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- programmable logic
- logic device
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Abstract
The invention relates to a server, which comprises a complex programmable logic device, a shielding and resetting unit and a switching unit, wherein the complex programmable logic device receives a power good signal and generates a switching signal, wherein after burning of the complex programmable logic device is finished, the server can generate a resetting signal so that the power good signal is in a resetting state, and the switching signal is in a suspension joint state; the shielding and resetting unit is connected with the complex programmable logic device and shields the switching signal according to the power good signal to generate a control signal, wherein the control signal has a fixed level; and the switching unit is connected with the shielding and resetting unit, receives a first power source and a second power source, and switches the first power source or the second power source according to the control signal for being used as an output power source, thus, after burning of the complex programmable logic device is finished, the switching unit can accurately switch the output power source.
Description
Technical field
The present invention relates to a kind of servomechanism, and particularly relevant for a kind of servomechanism that can avoid the power supply handoff error.
Background technology
In servomechanism (Sever), (Complex Programmable LogicDevice CPLD) mainly is used for controlling the sequential of entire circuit to complex programmable logic device.Fig. 1 is the synoptic diagram of existing servomechanism.Please with reference to Fig. 1; When servomechanism 100 starts; Power supply unit 110 can provide power supply good signal SSI_PGD_PS to complex programmable logic device 120, and complex programmable logic device 120 can produce switching signal PGD_PS_5V, and is sent to switch unit 130.At this moment, switch unit 130 just can switch to working power P5V with standby power P5V_STBY, so that let servomechanism 100 operate as normal.
In general, servomechanism 100 need carry out burning to complex programmable logic device 120 under some is used, so that upgrade the information in the complex programmable logic device 120.And when complex programmable logic device 120 burnings are accomplished; Servomechanism 100 can produce a replacement (Reset) signal; The switching signal PGD_PS_5V that makes complex programmable logic device 120 directly see off can become suspension joint (Floating) state; And cause switch unit 130 switch operating power supply P5V and standby power P5V_STBY effectively, make servomechanism 100 produce misoperation.
Yet, under the state that servomechanism 100 is not started shooting, during burning complex programmable logic device 120, will not have any influence.But, under the state of servomechanism 100 starts, when carrying out complex programmable logic device 120 burnings; Because switch unit 130 is after complex programmable logic device 120 burnings are accomplished; Normally switch operating power supply P5V and standby power P5V_STBY, servomechanism 100 will be in power-down state, and can't normally move; Simultaneously also maybe be because power down suddenly makes servomechanism 100 lose some important informations.
Summary of the invention
The purpose of this invention is to provide a kind of servomechanism, can avoid the complex programmable logic device burning to accomplish by this effectively after, servomechanism can be in power down and the problem that can't normally move, and can prevent losing of important information.
The present invention proposes a kind of servomechanism, comprises complex programmable logic device, covers reset cell and switch unit.Complex programmable logic device receives the power supply good signal; Produce switching signal, wherein after said complex programmable logic device burning was accomplished, said servomechanism can produce reset signal; Make that said power supply good signal is a Reset Status, said switching signal is a floating.Cover reset cell and connect said complex programmable logic device, according to said power supply good signal, cover said switching signal, to produce control signal, wherein said control signal has fixing accurate position.Switch unit connects the said reset cell that covers; Receive first power supply and second source, and, switch said first power supply or said second source as out-put supply according to said control signal; Wherein said first power supply is the stand-by operation power supply, and said second source is the operate as normal power supply.
In an embodiment of the present invention, said cover reset cell comprise with door with lift resistance.Said first input end with door receives said power supply good signal, and its second input end receives said switching signal, and produces said control signal in its output terminal.First end that lifts resistance connects second input end said and door; Its second termination is received a high level signal; And the said resistance that lifts is when said power supply good signal is said Reset Status, and the said switching signal that will be in said floating draws high by force and is high level.
In an embodiment of the present invention, said complex programmable logic device is to carry out burning through joint test working group.
In an embodiment of the present invention, said servomechanism further comprises power supply unit.Said power supply unit provides said power supply good signal.
The present invention is by covering reset cell after the complex programmable logic device burning is accomplished; Cover the switching signal that is in floating; And produce control signal with fixing accurate position, so that let switch unit correctly first power supply switched to second source (or second source switches to first power supply).Thus; Can avoid servomechanism effectively under open state, complex programmable logic device is carried out burning after, switch unit can't normally switch out-put supply; And make servomechanism be in power down and the problem that can't normally move, and can prevent losing of important information.
For letting the above-mentioned feature and advantage of the present invention can be more obviously understandable, hereinafter is special lifts embodiment, and conjunction with figs. is done following detailed description.
Description of drawings
Synoptic diagram for existing servomechanism shown in Figure 1;
Shown in Figure 2 is the synoptic diagram of the servomechanism of one embodiment of the invention.
Accompanying drawing primary clustering symbol description
100,200: servomechanism; 110,210: power supply unit;
120,220: complex programmable logic device; 130,240: switch unit;
230: cover reset cell; 250: joint test working group;
SSI_PGD_PS, SPGD: power supply good signal; PGD_PS_5V, SW: switching signal;
P5V: working power; P5V_STBY: standby power;
SC: control signal; V1: first power supply;
V2: second source; R: lift resistance;
VH: high level signal.
Embodiment
Shown in Figure 2 is the synoptic diagram of the servomechanism of one embodiment of the invention.Please with reference to Fig. 2, servomechanism 200 comprises power supply unit 210, complex programmable logic device 220, covers reset cell 230 and switch unit 240.
Complex programmable logic device 220 receives power supply good signal SPGD, produces switching signal SW.And switching signal SW can switch the first power supply V1 and the second source V2 foundation as out-put supply for switch unit 240.For instance, when switching signal SW was high level, switch unit 240 switched the first power supply V1 (second source V2) as out-put supply, and when switching signal SW was low level, switch unit 240 switched second source V2 (the first power supply V1) as out-put supply.
In addition, after complex programmable logic device 220 burnings were accomplished, servomechanism 200 can produce reset signal, make that power supply good signal SPGD is Reset Status (that is power supply good signal SPGD is a low level), and switching signal SW is suspension joint (Floating) state.In the present embodiment, complex programmable logic device 220 is to carry out burning through joint test working group (JTAG) 250.
In the present embodiment, cover reset cell 230 when power supply good signal SPGD is Reset Status (that is power supply good signal SPGD is a low level), cover the switching signal SW of floating, make that control signal SC is a low level.And cover reset cell 230 when power supply good signal SPGD is not Reset Status, then can not cover switching signal SW.Thus, after complex programmable logic device 220 burnings are accomplished, switch unit 240 will can not receive the switching signal SW of floating, but receive low level control signal SC.
In the present embodiment, cover reset cell 230 also comprise with door with lift resistance R.Should receive power supply good signal SPGD with the first input end of door, with second input end reception switching signal SW of door, and the output terminal of Yu Yumen produces control signal SC.Lift first end connection of resistance R and second input end of door; Its second termination is received high level signal VH; And lifting resistance R when said power supply good signal SPGD is said Reset Status, the said switching signal SW that will be in said floating draws high by force and is high level.
In overall operation, when servomechanism 200 under open state, power supply unit 210 can provide the power supply good signal SPGD of high level to complex programmable logic device 220, and complex programmable logic device 220 just can produce the switching signal SW of high level.At this moment, lifting resistance R will can the generation effect.Then, first input end and received power supply good signal SPGD and the switching signal SW of second input end with door is high level.Therefore, the control signal SC that is produced with door also is high level, makes switch unit 240 that the first power supply V1 (stand-by operation power supply) is switched to second source V2 (operate as normal power supply), makes servomechanism 200 normal operations.
At this moment; If complex programmable logic device 220 is carried out burning; And after complex programmable logic device 220 burnings were accomplished, servomechanism 200 can produce reset signal, so that its inner overall operation of resetting; So can make power supply good signal SPGD become low level (that is power supply good signal SPGD is in Reset Status), switching signal SW then becomes floating.Then, owing to the power supply good signal SPGD that first input end received with door is a low level, the feasible control signal SC that exports with the output terminal of door also is a low level.Afterwards, switch unit 240 just can be by low level control signal SC, and second source V2 (operate as normal power supply) is switched to the first power supply V1 (stand-by operation power supply), makes that servomechanism 200 can operate as normal.
What deserves to be mentioned is, when above-mentioned power supply good signal SPGD is in Reset Status, lifts resistance R and can the switching signal SW that be in floating be haled and be upgraded to high level that the switching signal SW that makes second input end with door receive is a high level.Therefore, after electrifying startup was accomplished also again in servomechanism 200 replacements, power supply unit 210 can provide the power supply good signal SPGD of high level once more.Because this moment, first input end and the received switching signal SW of second input end with door was high level; Therefore the control signal SC that is produced with door also is high level; Make switch unit 240 once more the first power supply V1 (stand-by operation power supply) switched to second source V2 (operate as normal power supply), make servomechanism 200 operate as normal.
Thus; Can cover the switching signal SW of floating effectively with door (covering reset cell 230); So that switch unit 240 can normally switch the first power supply V1 and second source V2; Make the problem that servomechanism 200 can can't not be worked being in power down, and can prevent losing of important information.
In sum; The present invention is by covering reset cell after the complex programmable logic device burning is accomplished; Cover the switching signal that is in floating; And produce control signal with fixing accurate position, so that let switch unit correctly first power supply switched to second source (or second source switches to first power supply).Thus; Can avoid servomechanism effectively under open state, complex programmable logic device is carried out burning after, switch unit can't normally switch out-put supply; And make servomechanism be in power down and the problem that can't normally move, and can prevent losing of important information.
What should explain at last is: above embodiment is only in order to explaining technical scheme of the present invention, but not to its restriction; Although with reference to previous embodiment the present invention has been carried out detailed explanation, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these are revised or replacement, do not make the spirit and the scope of the essence disengaging various embodiments of the present invention technical scheme of relevant art scheme.
Claims (4)
1. servomechanism is characterized in that it comprises:
One complex programmable logic device; Receive a power supply good signal; Produce one and switch signal, wherein after said complex programmable logic device burning was accomplished, said servomechanism can produce a reset signal; Make that said power supply good signal is a Reset Status, and said switching signal is a floating;
One covers reset cell, connects said complex programmable logic device, according to said power supply good signal, covers said switching signal, and to produce a control signal, wherein said control signal has fixing accurate position; And
One switching unit; Connect the said reset cell that covers; Receive one first power supply and a second source, and, switch said first power supply or said second source as out-put supply according to said control signal; Wherein said first power supply is the stand-by operation power supply, and said second source is the operate as normal power supply.
2. servomechanism according to claim 1 is characterized in that, the wherein said reset cell that covers comprises:
One with the door, its first input end receives said power supply good signal, its second input end receives said switching signal, and produces said control signal in its output terminal; And
One lifts resistance; Its first end connects second input end said and door; Its second termination is received a high level signal, and the said resistance that lifts is when said power supply good signal is said Reset Status, and the said switching signal that will be in said floating draws high by force and is high level.
3. servomechanism according to claim 1 is characterized in that, wherein said complex programmable logic device is to carry out burning through joint test working group.
4. servomechanism according to claim 1 is characterized in that it further comprises:
One power supply unit provides said power supply good signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101292650A CN101853062B (en) | 2009-04-03 | 2009-04-03 | Server |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101292650A CN101853062B (en) | 2009-04-03 | 2009-04-03 | Server |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101853062A CN101853062A (en) | 2010-10-06 |
| CN101853062B true CN101853062B (en) | 2012-06-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101292650A Expired - Fee Related CN101853062B (en) | 2009-04-03 | 2009-04-03 | Server |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103853301A (en) * | 2012-11-30 | 2014-06-11 | 英业达科技有限公司 | Server system and automatic reset method thereof |
| CN104076901A (en) * | 2013-03-28 | 2014-10-01 | 英业达科技有限公司 | Server |
| CN104571434A (en) * | 2013-10-22 | 2015-04-29 | 英业达科技有限公司 | Server and reboot method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5019996A (en) * | 1988-08-29 | 1991-05-28 | Advanced Micro Devices, Inc. | Programmable power supply level detection and initialization circuitry |
| EP0563924A1 (en) * | 1992-04-01 | 1993-10-06 | Nec Corporation | Control device for controlling a central processing unit on instantaneous voltage drop |
| CN1591377A (en) * | 2003-06-10 | 2005-03-09 | 阿尔特拉公司 | Apparatus and methods for communicating with programmable logic devices |
| CN1786968A (en) * | 2005-12-08 | 2006-06-14 | 复旦大学 | FPGA logic unit functional model and universal logic unit containing computing method |
-
2009
- 2009-04-03 CN CN2009101292650A patent/CN101853062B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5019996A (en) * | 1988-08-29 | 1991-05-28 | Advanced Micro Devices, Inc. | Programmable power supply level detection and initialization circuitry |
| EP0563924A1 (en) * | 1992-04-01 | 1993-10-06 | Nec Corporation | Control device for controlling a central processing unit on instantaneous voltage drop |
| CN1591377A (en) * | 2003-06-10 | 2005-03-09 | 阿尔特拉公司 | Apparatus and methods for communicating with programmable logic devices |
| CN1786968A (en) * | 2005-12-08 | 2006-06-14 | 复旦大学 | FPGA logic unit functional model and universal logic unit containing computing method |
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| CN101853062A (en) | 2010-10-06 |
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