CN103365387A - Clearing circuit of memory - Google Patents
Clearing circuit of memory Download PDFInfo
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- CN103365387A CN103365387A CN2012101172580A CN201210117258A CN103365387A CN 103365387 A CN103365387 A CN 103365387A CN 2012101172580 A CN2012101172580 A CN 2012101172580A CN 201210117258 A CN201210117258 A CN 201210117258A CN 103365387 A CN103365387 A CN 103365387A
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- 230000015654 memory Effects 0.000 title abstract description 11
- 238000009434 installation Methods 0.000 claims description 121
- 230000003287 optical effect Effects 0.000 claims description 3
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- 238000010586 diagram Methods 0.000 description 10
- 101100205847 Mus musculus Srst gene Proteins 0.000 description 9
- 230000008569 process Effects 0.000 description 7
- 230000002093 peripheral effect Effects 0.000 description 4
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- 238000005516 engineering process Methods 0.000 description 3
- 239000012467 final product Substances 0.000 description 3
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- 230000005540 biological transmission Effects 0.000 description 1
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Abstract
The invention provides a clearing circuit of a memory, which comprises a clearing switch unit and a clearing photoelectric unit. The clear switch unit is coupled to a ground terminal and a memory of a system chip, and the clear switch unit is further coupled to the clear photovoltaic unit. When the clear photoelectric unit receives a clear light, a control signal is generated to the clear switch unit according to the clear light, and the clear switch unit is switched according to the control signal, so that the memory of the system chip is coupled with the grounding terminal to clear the memory.
Description
Technical field
The invention relates to a kind of control circuit of electronic installation, refer to especially a kind of removing circuit of storer.
Background technology
In recent years, the continuous evolution of infotech and computer technology allows computer system develop into PC from server, (for example: notebook computer) develops into portable computer from desktop computer again.In the development evolution process of computer system, computer system all needs to carry out boot program according to the stored default value of the storer of System on Chip/SoC, to enter in the operating system, but computer system is when abnormal, the problem of boot program namely can occur to carry out, at this moment, the user can restart computer system, and is unusual to get rid of.General computer system be to get rid of by the power supply that opens and closes computer system unusually, but the user be in the time still can't getting rid of computer system unusual by Switching power, the user namely needs to remove the default value of computer system, and is unusual to get rid of.
Generally speaking, computer system is provided with platform controller hub (Platform Controller Hub, PCH), baseboard management controller (Baseboard Management Controller, BMC) or the programmable chip such as complicated programmable logical unit (Complex Programmable Logic Device), with the System on Chip/SoC as computer system.And generally has a storer in the System on Chip/SoC, be used for storing computer system employed default value of present stage, and the storer of System on Chip/SoC is according to an independent current source, for example: battery, and keep stored data, therefore, the user need pass through the power supply of the storer of cut-out supply system chip, could scavenge system chip the stored default value of storer and get rid of unusual, and then computer system is replied the setting value of storer to the default default value of former factory after clearing data at the storer of System on Chip/SoC, unusual to get rid of, and normally carry out boot program, be connected in and finish boot program and enter operating system.
Because the power supply of the storer of System on Chip/SoC is not the power supply that power supply unit is supplied, but the power supply that an independently-powered unit that is arranged in addition computer system is supplied, for example: battery, for the memory storage system setting value, the method of the memory power of therefore early stage cutting system chip is the battery of directly pulling out on the computer system, to cut off battery to the power supply of storer, again with the battery again storer of coupling system chip, to allow battery again supply power to the storer of System on Chip/SoC.
But above-mentioned action of pulling out battery very bothers.The dealer satisfies for the problem of pulling out the power supply unit inconvenience now, develop the method for the power supply of another kind of reset system chip, it arranges one and switches switch between the storer and battery of System on Chip/SoC, to provide the user in computer system shutdown situation, the direct control change-over switch makes the power source supply end of the storer of System on Chip/SoC switch to earth terminal, thereby the memory power of cutting system chip, to reach the purpose of removing the stored data of storer.
From the above, above-mentioned system's reset mode is arranged in the computer system because of battery or change-over switch, so allow the user when the stored data of the storer of scavenge system chip, need open first the casing of computer system, can remove the storer of the System on Chip/SoC of computer system.So each time during the storer of scavenge system chip, all need dismantle first casing, the power supply of storer of cutting system chip continues, and allow System on Chip/SoC again connect the power supply of storer, then close casing, for the user removes the stored data of storer, be quite inconvenient so.Moreover the user often need use aid in order to pulling out battery, so the user can occur to allow because of carelessness aid damage circuit in the computer system in pulling out process; And change-over switch is generally for fear of the circuit usable floor area that too takies on the computer system, can allow the volume of change-over switch reduce as far as possible, thereby cause operating inconvenience, so the user also need use aid, switching with the control change-over switch, make the storer selectivity of System on Chip/SoC couple battery and ground connection, so also can cause the user in the operating process of change-over switch, to allow because of carelessness aid damage circuit.
Summary of the invention
In view of this, the present invention proposes a kind of removing circuit of storer, it improves the problem that the existing system reset technique need be opened first casing, need not again to pull out power supply unit, also need not to operate change-over switch, and be convenient to the power supply of the storer of cutting system chip, to remove the default value of storer.
Fundamental purpose of the present invention is to provide a kind of removing circuit of storer, and it provides the power supply of a cordless reset system chip, thereby need not to dismantle casing, storer that can the scavenge system chip.
The invention provides a kind of removing circuit of storer, it is applied to remove a storer of a System on Chip/SoC.This removing circuit comprises that one removes photovoltaic element and a clear switch unit, this clear switch unit couples this storer of an earth terminal and this System on Chip/SoC, and this removing photovoltaic element couples this clear switch unit, and foundation one removing light produces a control signal, switch to control this clear switch unit, allow this storer of this System on Chip/SoC couple this earth terminal through this clear switch unit, to remove the stored default value of this storer.Therefore the present invention need not to dismantle casing, only by removing light, gets final product the storer of scavenge system chip.
The present invention proposes a kind of removing circuit of storer, it improves the problem that the existing system reset technique need be opened first casing, need not again to pull out power supply unit, also need not to operate change-over switch, and be convenient to the power supply of the storer of cutting system chip, to remove the default value of storer.
Description of drawings
Fig. 1 is the calcspar of the electronic installation of one embodiment of the invention;
Fig. 2 is the removing circuit of one embodiment of the invention and the calcspar of power supply unit;
Fig. 3 is the circuit diagram of the removing circuit of one embodiment of the invention;
Fig. 4 is the process flow diagram of one embodiment of the invention;
Fig. 5 is the process flow diagram of another embodiment of the present invention;
Fig. 6 is the removing circuit of another embodiment of the present invention and the calcspar of power supply unit;
Fig. 7 is the circuit diagram of the removing circuit of another embodiment of the present invention; And
Fig. 8 is the partial block diagram of the electronic installation of another embodiment of the present invention.
Drawing reference numeral:
10 electronic installations
102 power supply units
103 power supply units
104 current limliting unit
106 reset cells
12 CPU (central processing unit)
122 primary memorys
14 South Bridge chips
142 storeies
144 remove driver element
146 replacement driver elements
16 embedded control unit
162 storeies
18 remove circuit
181 detecting units
182 remove photovoltaic element
184 clear switch unit
186 replacement photovoltaic elements
188 Resetting Switching unit
190 the first transistors
192 transistor secondses
194 resistance
195 resistance
196 the first transistors
197 transistor secondses
198 the first transistors
199 transistor secondses
22 peripheral elements
30 remove light
32 replacement light
The GND earth terminal
The Sclr control signal
Srst resets and drives signal
The VDD power supply
Embodiment
For ease of architectural feature of the present invention and the effect reached are more had further understanding and understanding, careful assistant to be implementing illustration and to cooperate detailed explanation, illustrate as after:
See also Fig. 1, Fig. 2 to Fig. 3, its be the electronic installation of one embodiment of the invention calcspar, power supply unit and removing circuit calcspar with and the circuit diagram of removing circuit.As shown in Figure 1, one embodiment of electronic installation 10 of the present invention is a computer apparatus, for example: server, electronic installation 10 comprise a CPU (central processing unit) 12, a primary memory 122, a South Bridge chip 14, an embedded control unit 16, removing circuit 18 and a peripheral element 22.Electronic installation 10 of the present invention is to couple primary memory 122 and South Bridge chip 14 by CPU (central processing unit) 12, and is coupled embedded control unit 16, removed circuit 18 and peripheral element 22 by South Bridge chip 14, and embedded control unit 16 also couples removing circuit 18.
In the time of can't finishing boot program when electronic installation 10 abnormals, according to one embodiment of the invention can by remove circuit 18 at electronic installation 10 under unused state, allow power supply unit 102 end to supply power to the storer of System on Chip/SoC, in this embodiment, namely allow the storer 142 or 162 of South Bridge chip 14 or embedded control unit 16 be coupled to earth terminal GND (as shown in Figure 2) through this removing circuit 18, with the storer 142 of removing South Bridge chip 14 or storer 162 internal datas of embedded control unit 16, thereby removing storer 142 or 162 stored default values, allow by this electronic installation 10 default value that former factory is default be written into the storer 142 of South Bridge chip 14 or the storer 162 of embedded control unit 16, so can get rid of the unusual of electronic installation 10.Above-mentioned electronic installation 10 is written into the default default value of former factory to the mode of storer 142 or storer 162, is technology known in those skilled in the art, so no longer describe in detail in this.How removing circuit 18 of the present invention removes being described in detail as follows of storer.
As shown in Figure 2, remove circuit 18 and comprise a detecting unit 181, removing photovoltaic element 182 and a clear switch unit 184.Clear switch unit 184 couples the storer 142 of earth terminal GND, South Bridge chip 14, storer 162 and the removing photovoltaic element 182 of embedded control unit 16, power supply unit 102 transmission power supplys are to South Bridge chip 14 and embedded control unit 16, to supply power to the storer 142 and 162 of South Bridge chip 14 and embedded control unit 16, power supply unit 102 more couples removes photovoltaic element 182, to transmit power supply to removing photovoltaic element 182.Remove photovoltaic element 182 detectings one and remove light 30, and when detecting removing light 30, produce a control signal Sclr (as shown in Figure 3), and control clear switch unit 184 switches, make the storer 142 of South Bridge chip 14 and the storer 162 of embedded control unit 16 be coupled to earth terminal GND via clear switch unit 184, thereby allow storer 142 and 162 be coupled to earth terminal GND, supply power to storer 142 and 162 and end power supply unit 102, to remove storer 142 and 162 stored default values.
When removing storer 142 and 162 stored default values, for fear of allowing electronic installation 10 be affected, preferably carry out under the state that electronic installation 10 does not operate, namely electronic installation 10 is not in and just removes storer 142 and 162 under the use state.Therefore, whether removing circuit 18 of the present invention more can further be in the use state by detecting unit 181 detecting electronic installations 10.When detecting unit 181 confirms that electronic installation 10 is not to be under the use state, detecting unit 181 can enable clear switch unit 184, so that clear switch unit 184 can be switched according to control signal Sclr, to remove storer 142 and 162 stored default values.Otherwise, when detecting unit 181 confirms that electronic installation 10 is to be under the use state, detecting unit 181 meeting forbidden energy clear switch unit 184, even if so clear switch unit 184 receives that control signal Sclr can not switch yet, and can not remove storer 142 and 162 stored default values, to avoid affecting the electronic installation 10 under treatment state.
In one embodiment of the invention, whether the power-supply unit (not shown) of detecting unit 181 detecting electronic installations 10 has the regular supply power supply to electronic installation 10, if power-supply unit regular supply power supply is to electronic installation 10, represent that then electronic installation 10 is in the use state, otherwise represent that then electronic installation 10 is not in the use state.The mode whether detecting unit 181 detecting electronic installations 10 of the present invention are in the use state is a lot of, institute only is one embodiment of the invention in the above described manner, do not limit detecting unit 181 and only can detect power-supply unit, and judge whether electronic installation 10 is in the use state.In one embodiment of the invention, detecting unit 181 is the complicated programmable logical unit (Complex Programmable Logic Device, CPLD) of electronic installation 10.
In addition, power supply unit 102 of the present invention includes a power supply unit 103 and a current limliting unit 104.Power supply unit 103 is coupled to earth terminal GND and is used for the supply power supply, current limliting unit 104 is located between the removing photovoltaic element 182 and power supply unit 103 of removing circuit 18, and be located at storer 142,162 and power supply unit 103 between, cause removing photovoltaic element 182 to avoid power supply unit 103 that the excessive power supply of electric current is provided, storer 142 and 162 is impaired.In addition, current limliting unit 104 also can be avoided power supply unit 102 over-discharge can and reduce serviceable life.
As shown in Figure 3, the removing photovoltaic element 182 of the present embodiment is an optical diode, and couples power vd D and clear switch unit 184 that power supply unit 102 provides.Clear switch unit 184 has a first transistor 190 and a transistor seconds 192 and a resistance 194.In addition, the removing circuit 18 of the present embodiment more is provided with resistance 195.The grid of the first transistor 190 is coupled to detecting unit 181 and is controlled by detecting unit 181, the drain electrode of the first transistor 190 is coupled to removes photovoltaic element 182, the source electrode of the first transistor 190 is coupled to the grid of transistor seconds 192 and an end of resistance 194, and the other end of resistance 194 is coupled to earth terminal GND.The drain electrode of transistor seconds 192 is coupled to the storer 142 of South Bridge chip 14 and the storer 162 of embedded control unit 16, and the source electrode of transistor seconds 192 is coupled to earth terminal GND, wherein removes circuit 18 and couples current limliting unit 104, to receive power vd D.One end of resistance 195 is coupled to power vd D, and the other end of resistance 195 is coupled to storer 142 and 162.
When removing light 30 exposes to removing photovoltaic element 182, remove photovoltaic element 182 and produce control signal Sclr to the first transistor 190 according to removing light 30 immediately, simultaneously, if detecting electronic installation 10, detecting unit 181 is in unused state, therefore detecting unit 181 orders about the first transistor 190 conductings, namely enable clear switch unit 184, to allow control signal Sclr produce voltage signal to the grid of transistor seconds 192 by resistance 194, order about by this transistor seconds 192 and switch to conducting, make resistance 195, the storer 142 of South Bridge chip 14 is coupled to earth terminal GND with the storer 162 of embedded control unit 16 through transistor seconds 192.Therefore, the storer 142,162 of South Bridge chip 14 and embedded control unit 16 is also along with being coupled to earth terminal GND, thereby can remove storer 142,162 stored data.
In addition, detecting unit 181 is in detecting electronic installation 10 when being in the use state, control immediately the first transistor 190 cut-offs, it is forbidden energy clear switch unit 184, that is to say, the control signal Sclr that removing photovoltaic element 182 produces can't pass through the first transistor 190, cause control signal Sclr to produce voltage signal to transistor seconds 192 by resistance 194,, detecting unit 181 controls clear switch unit 184 forbidden energy of removing circuit 18 so namely being in the use state according to electronic installation 10, clear switch unit 184 can't be switched according to control signal Sclr, and allow transistor seconds 192 end, the storer 142 of South Bridge chip 14 and embedded control unit 16 thereupon, 162 are not coupled to earth terminal GND, so storer 142,162 still keep originally data storing.
In addition, the user of service can judge when whether electronic installation 10 is in the use state, does not namely need to judge by detecting unit 181, and removing circuit 18 of the present invention like this namely need not to arrange detecting unit 181 and the first transistor 190.In one embodiment of the invention, removing light 30 of the present invention is that the user utilizes electric torch or other portable type light sources to produce, to remove storer 142 and 162 stored data, so namely do not need to take apart the casing of electronic installation 10, can remove the default value of storer 142 and 162, to return back to the default default value of former factory.
See also Fig. 4, it controls the process flow diagram of an embodiment who removes circuit for the present invention.As shown in the figure, whether the present embodiment is in the use state by detecting unit 181 for electronic installation 10 is controlled removing circuit 18, and detecting unit 181 is judged the various states of electronic installation 10 item by item, whether is in the use state to judge electronic installation 10.Shown in step S100, after electronic installation 10 has coupled power supply, shown in step S110, confirmed the opening of electronic installation 10 by detecting unit 181, whether the power key of namely judging electronic installation 10 is pressed, and when power key is not pressed, represents that then electronic installation 10 is not unlocked, so then re-execute step S110, to reaffirm the opening of electronic installation 10.When power key is pressed and confirms that electronic installation 10 has been unlocked, the execution in step that continues S120; By shown in the step S120, whether the clear switch unit 184 of confirming electronic installations 10 by detecting unit 181 forbidden energy, when clear switch unit 184 is forbidden energy, the execution in step that continues S130 is with the state of the power-supply unit (Power Supply Unit, PSU) of connection confirm electronic installation 10, when clear switch unit 184 during for forbidden energy not, be clear switch unit 184 when enabling, the execution in step that then continues S170 is with the powered-down feeding unit.
Continue above-mentioned, shown in step S130, detecting unit 181 is confirmed the opening of the power-supply unit of electronic installation 10, when power-supply unit is unlatching, the execution in step that continues S140, with the state of the primary power of connection confirm electronic installation 10, when power-supply unit when not opening, the execution in step that continues S170 is with the powered-down feeding unit; By shown in the step S140, detecting unit 181 is confirmed the opening of the primary power of electronic installation 10, when primary power is unlatching, the execution in step that continues S150, state with each element of connection confirm electronic installation 10, when primary power was not opened, the execution in step that continues S170 was with the powered-down feeding unit; By shown in the step S150, the opening of each element of detecting unit 181 detecting electronic installations 10, such as: the opening of the system elements such as primary memory 122, CPU (central processing unit) 12, peripheral element 22, when the power supply of each element is unlatching for normal each element, the execution in step that continues S160, with the state of the system platform of confirming electronic installation 10, when each element when not opening, the execution in step that continues S170 is with the powered-down feeding unit.
By shown in the step S160, the Reset Status of the system platform of detecting unit 181 detecting electronic installations 10, when system platform when not resetting, the execution in step that continues S170 is with the powered-down feeding unit, when system platform is reset, the execution in step that continues S180, and forbidden energy clear switch unit 184.By shown in the step S190, after step S170 carries out the powered-down feeding unit, detecting unit 181 enables clear switch unit 184, therefore remove photovoltaic element 182 and can be sent to clear switch unit 184 according to the control signal Sclr that removing light produces, switch with control clear switch unit 184, allow the storer of System on Chip/SoC be coupled to earth terminal GND through clear switch unit 184, thereby the stored data of the storer of scavenge system chip, return back to by this default default value of former factory for electronic installation 10, wherein the System on Chip/SoC of the present embodiment is South Bridge chip 14 and embedded control unit 16, and its storer is respectively storer 142 and 162.The above-mentioned state detecting step of using is the prior art of electronic installation, so the present embodiment repeats no more thin section start relation.
The above, the present invention is a kind of removing circuit of storer, it produces control signal Sclr to clear switch unit 184 by removing photovoltaic element 182 according to removing light 30, and control clear switch unit 184 switches, allow the storer of System on Chip/SoC be coupled to earth terminal through clear switch unit 184, therefore the present invention can the storer of scavenge system chip in stored default value, for the electronic installation 10 default default value of former factory of resetting back, so the present invention need not dismantle the removing that the casing of electronic installation 10 gets final product the completion system setting value, to return back to the default default value of former factory.In addition, whether the present invention more can be in the use state according to electronic installation 10 and forbidden energy by detecting unit 181/enable clear switch unit 184, removes the non-working condition that circuit 18 operates on electronic installation 10 with control.
See also Fig. 5, it controls the process flow diagram of another embodiment that removes circuit for the present invention.Wherein the difference of Fig. 4 and Fig. 5 is that Fig. 5 comprises that further one transmits the step of Far end control signal.As shown in the figure, electronic installation 10 of the present invention more can by the operation of far-end, start electronic installation 10 with far-end.Shown in step S200, after electronic installation 10 has coupled power supply, the user is by shown in the step S210, by the far-end operation mode, by a Remote Control Unit one Far end control signal is sent to electronic installation 10 by world-wide web, such as: the modes such as Web service, far-end desktop services are connected to electronic installation 10, transmitting Far end control signal to electronic installation 10, thereby start electronic installation 10; Continue, to shown in the step S290, because step S220 is equal to above-described embodiment to step S290 step S120 is to step S190, so the present embodiment repeats no more by step S220.Because above-mentioned far-end operation mode is the prior art of electronic installation 10, so the present embodiment repeats no more.
See also Fig. 6 to Fig. 7, it is the removing circuit of another embodiment of the present invention and the calcspar and the circuit diagram of removing circuit of power supply unit.Wherein Fig. 2 to Fig. 3 is that with the difference of Fig. 6 to Fig. 7 the removing circuit 18 of Fig. 6 to Fig. 7 further comprises a replacement photovoltaic element 186 and a Resetting Switching unit 188, with a reset cell 106 of collocation electronic installation 10, and is used for replacement electronic installation 10.So, when abnormal state in electronic installation 10 operation and can't normal operation the time, can order about reset cell 106 replacement electronic installations 10 by replacement photovoltaic element 186 and Resetting Switching unit 188, get rid of abnormality to restart electronic installation 10.
Continue above-mentioned, the Resetting Switching unit 188 of the present embodiment couples earth terminal GND and reset cell 106, and earth terminal GND is reference edge in the present embodiment.Replacement photovoltaic element 186 couples this Resetting Switching unit 188, and according to a replacement light 32 generations one replacement driving signal Srst (as shown in Figure 7), switch and drive this Resetting Switching unit 188, allow this reset cell 106 be coupled to this reference edge through this Resetting Switching unit 188, to order about this reset cell 106 replacement electronic installations 10.Wherein, the reference edge of the present embodiment is earth terminal GND, and in addition, reference edge of the present invention can arrange according to the trigger condition of reset cell 106 current potential of reference edge, but not is limited to earth terminal GND; The reset cell 106 of the present embodiment more can be integrated in South Bridge chip 14 or the embedded control unit 16, and by South Bridge chip 14 or embedded control unit 16 replacement electronic installations 10.
In addition, the power supply unit 102 of this embodiment more couples reset cell 106 and the replacement photovoltaic element 186 of removing circuit 18, to provide power supply to reset cell 106 and replacement photovoltaic element 186.The current limliting unit 104 of the power supply unit 102 of this embodiment more is coupled between power supply unit 103 and the reset cell 106, and be coupled between power supply unit 103 and the replacement photovoltaic element 186, to avoid power supply unit 103 to provide the power supply of super-high-current to reset cell 106 and replacement photovoltaic element 186, and causing reset cell 106 and replacement photovoltaic element 186 impaired, current limliting unit 104 also can be avoided power supply unit 102 over-discharge can and reduce serviceable life.
In addition, the Resetting Switching unit 188 of this embodiment more couples detecting unit 181, when detecting unit 181 detecting electronic installations 10 also have normal executive routine or software at present, be that electronic installation 10 is in normal operating condition, detecting unit 181 meeting forbidden energy Resetting Switching unit 188, so Resetting Switching unit 188 namely can't drive reset cell 106 replacement electronic installations 10, be reset to avoid reset cell 106 to be under the normal operating condition at electronic installation 10, so can avoid electronic installation 10 to damage or lost data.In other words, when detecting unit 181 confirms that electronic installation 10 is not to be under the normal operating condition, detecting unit 181 can enable Resetting Switching unit 188, switch to allow Resetting Switching unit 188 drive signal Srst according to the replacement that replacement photovoltaic element 186 is produced, be coupled to reference edge to order about reset cell 106 through Resetting Switching unit 188, restart electronic installation 10 to order about reset cell 106 replacement electronic installations 10, to get rid of abnormality.
In one embodiment of the invention, whether the CPU (central processing unit) 12 (as shown in Figure 1) of detecting unit 181 detecting electronic installations 10 has normal executive routine or software, if CPU (central processing unit) 12 normal executive routine or softwares, represent that then electronic installation 10 is in normal operating condition, otherwise represent that then electronic installation 10 is not in normal operating condition, for example the CPU (central processing unit) 12 a certain programs of execution of electronic installation 10 or software are crossed for a long time and are surpassed the normal execution time and without any response, represent that namely electronic installation 10 is not in normal operating condition.The mode whether detecting unit 181 detecting electronic installations 10 of the present invention are in normal operating condition is a lot of, so above-mentioned detecting mode only is one embodiment of the invention, do not limit detecting unit 181 and only can detect CPU (central processing unit) 12, and judge whether electronic installation 10 is in normal operating condition.
Consult again Fig. 7 and since the first transistor 190 of removing photovoltaic element 182, clear switch unit 184 and transistor seconds 192 and resistance 194,195 annexation and start relation formerly Fig. 3 embodiment illustrate, so the present embodiment repeats no more.The replacement photovoltaic element 186 of this embodiment also is an optical diode, and Resetting Switching unit 188 has a first transistor 196 and a transistor seconds 197 and a resistance 198, removes circuit 18 and more is provided with a resistance 199.The grid of the first transistor 196 is coupled to detecting unit 181 and is subjected to detecting unit 181 controls, the drain electrode of the first transistor 196 is coupled to replacement photovoltaic element 186, replacement photovoltaic element 186 more couples the power vd D of power supply unit 102, the source electrode of the first transistor 196 is coupled to the grid of transistor seconds 197 and an end of resistance 198, and the other end of resistance 198 is coupled to earth terminal GND.The drain electrode of transistor seconds 197 is coupled to an end of reset cell 106 and resistance 199, and the other end of resistance 199 is coupled to power vd D, and the source electrode of transistor seconds 197 is coupled to earth terminal GND, and namely the source electrode of transistor seconds 197 is coupled to reference edge.
When replacement light 32 exposes to replacement photovoltaic element 186, replacement photovoltaic element 186 produces to reset according to replacement light 32 immediately and drives signal Srst to the first transistor 196, simultaneously, if detecting electronic installation 10, detecting unit 181 is in not normal operating condition, therefore detecting unit 181 orders about the first transistor 196 conductings, namely enable Resetting Switching unit 188, produce voltage signal to the grid of transistor seconds 197 to allow reset to drive signal Srst by the first transistor 196 and pass through resistance 198, the conducting transistor seconds 197 by this, make reset cell 106 and resistance 199 be coupled to earth terminal GND through transistor seconds 197, namely be coupled to reference edge, therefore, reset cell 106 namely is driven the electronic installation 10 of resetting, and restarts electronic installation 10, to get rid of execute exception.
In addition, detecting unit 181 is in detecting electronic installation 10 when being in normal operating condition, control immediately the first transistor 196 cut-offs, that is to say, the replacement that replacement photovoltaic element 186 produces drives signal Srst can't pass through the first transistor 196, the driving signal Srst that causes resetting can't produce voltage signals to transistor seconds 197 by resistance 198, so transistor seconds 197 is cut-off, that is to say detecting unit 181 to be in normal operating condition according to electronic installation 10 and the Resetting Switching unit 188 of forbidden energy removing circuit 18, making Resetting Switching unit 188 can't receive replacement that replacement photovoltaic element 186 produces according to replacement light 32 drives signal Srst and can't switch, allow reset cell 106 be coupled to reference edge by Resetting Switching unit 188, thereby the electronic installation 10 of not resetting.
In addition, an other embodiment of the present invention, if the user can judge electronic installation 10 and whether be in normal operating condition, the first transistor 196 that so can not need detecting unit 181 and Resetting Switching unit 188, and only need transistor seconds 197, transistor seconds 197 drives signal Srst according to resetting and switches, and allows reset cell 106 be coupled to reference edge through transistor seconds 197, to order about reset cell 106 replacement electronic installations 10.
See also Fig. 8, it is the partial block diagram of the electronic installation of another embodiment of the present invention.Wherein the difference of Fig. 6 and Fig. 8 is that Fig. 8 comprises that further one removes light source 108, a replacement light source 110, removing driver element 144 and a replacement driver element 146.As shown in the figure, the removing circuit 18 of electronic installation 10 of the present invention more can arrange and remove light source 108, replacement light source 110, remove driver element 144 and replacement driver element 146, and photovoltaic element 182 and replacement photovoltaic element 186 are removed in irradiation to provide respectively removing light 30 with replacement light 32.Removing driver element 144 and the replacement driver element 146 of the present embodiment is coupled to respectively removes light source 108 and replacement light source 110, by this, remove driver element 144 and drive removing light source 108 generation removing light 30, remove photovoltaic element 182 to expose to, replacement driver element 146 drives replacement light source 110 and produces replacement light 32, to expose to replacement photovoltaic element 186.
In one embodiment of the invention, the external key (not shown) of electronic installation 10 can be controlled and remove driver element 144 and replacement driver element 146, produces with replacement light source 110 with control removing light source 108 and removes light 30 and replacement light 32.So, the user can remove light 30 and replacement light 32 and produce by pressing the external key of electronic installation 10, to remove data or the replacement electronic installation 10 of storer.In addition, in the another embodiment of the present invention, the user can far-end control remove driver element 144 and replacement driver element 146 by world-wide web, removes light source 108 with control and produces removing light 30 and replacement light 32 with replacement light source 110.The user can send remote signaling to the embedded control unit 16 of electronic installation 10 by world-wide web, and removes driver element 144 and replacement driver element 146 by embedded control unit 16 controls.
In addition, removing light 30 of the present invention is mutually different light with replacement light 32, the wavelength of namely removing light 30 is not identical with the wavelength of replacement light 32, and removing photovoltaic element 182 is not identical with the wavelength of the light that replacement photovoltaic element 186 is responded to yet, aforementioned removing light 30 can be a kind of ultraviolet light, replacement light 32 can be a kind of visible light, but the present invention is not as limit.In other words, remove photovoltaic element 182 and only can respond to removing light 30, and replacement photovoltaic element 186 only can be responded to replacement light 32, so removing circuit 18 of the present invention can utilize the removing light 30 of two kinds of different light rays and data and the replacement electronic installation 10 that replacement light 32 is removed storer.In addition, but removing driver element of the present invention 144 places electronic installation 10 with any chip or the Independent that replacement driver element 146 can be arranged at electronic installation 10 inside.
In sum, the present invention is a kind of removing circuit of storer, it provides removes photovoltaic element and clear switch unit, and produce the corresponding clear switch unit that controls signal to by removing photovoltaic element according to removing light, switch with control clear switch unit, allow the storer of System on Chip/SoC be coupled to earth terminal, to remove the stored data of storer, so the present invention need not take the casing of electronic installation apart, get final product the stored data of storer of scavenge system chip, thereby make things convenient for the user to get rid of easily the unusual problem of the stored default value of storer.In addition, removing circuit of the present invention more can be applicable to the electronic installation of resetting, and it produces corresponding replacement by the replacement photovoltaic element according to replacement light and drives signal to the Resetting Switching unit, switches with control Resetting Switching unit, allow reset cell be coupled to reference edge, with the replacement electronic installation.
Although the present invention discloses as above with embodiment; so it is not to limit the present invention, any 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 when being as the criterion with claim institute confining spectrum.
Claims (10)
1. the removing circuit of a storer is characterized in that, the removing circuit application of described storer is in a storer of removing a System on Chip/SoC, and described removing circuit comprises:
One clear switch unit, it couples the described storer of an earth terminal and described System on Chip/SoC; And
One removes photovoltaic element, it couples described clear switch unit, and produces a control signal according to a removing light, switches and control described clear switch unit, allow the described storer of described System on Chip/SoC couple described earth terminal through described clear switch unit, to remove described storer.
2. removing circuit as claimed in claim 1 is characterized in that, the removing circuit of described storer more comprises:
One detecting unit, it is arranged at an electronic installation and couples described clear switch unit, described detecting unit is detected described electronic installation and whether is in the use state, when described electronic installation is in described use state, the described clear switch of described detecting unit forbidden energy unit, when described power supply status when not being in described use state, described detecting unit enables described clear switch unit.
3. removing circuit as claimed in claim 2 is characterized in that, described clear switch unit comprises:
One the first transistor, it couples described removing photovoltaic element and described detecting unit, when described detecting unit is not in the use state at described electronic installation, controls described the first transistor and switches, to transmit described control signal; And
One transistor seconds, it couples the described storer of described earth terminal and described System on Chip/SoC, and switches according to described control signal, allows described storer couple described earth terminal through described transistor seconds, to remove described storer.
4. removing circuit as claimed in claim 1 is characterized in that, described removing photovoltaic element comprises at least one optical diode, and it produces described control signal according to described removing light.
5. removing circuit as claimed in claim 1 is characterized in that, described clear switch unit comprises:
One transistor, it couples the described storer of described earth terminal and described System on Chip/SoC, and switches according to described control signal, allows described storer couple described earth terminal through described transistor, to remove described storer.
6. removing circuit as claimed in claim 1 is characterized in that, the removing circuit of described storer more comprises:
One removes light source, and it produces described removing light; And
One removes driver element, and it couples described removing light source, produces described removing light to drive described removing light source.
7. removing circuit as claimed in claim 1 is characterized in that, the removing circuit of described storer more comprises:
One Resetting Switching unit, it couples a reference edge and a reset cell; And
One replacement photovoltaic element, it couples described Resetting Switching unit, and according to replacement light generation one replacement driving signal, switch and drive described Resetting Switching unit, allow described reset cell be coupled to described reference edge through described Resetting Switching unit, to order about the described reset cell electronic installation of resetting.
8. removing circuit as claimed in claim 7 is characterized in that, the removing circuit of described storer more comprises:
One detecting unit, it is arranged at an electronic installation and couples described Resetting Switching unit, and described detecting unit is detected described electronic installation and whether is in normal operating condition;
Described Resetting Switching unit comprises:
One the first transistor, it couples described replacement photovoltaic element and described detecting unit, when described detecting unit is not in normal operating condition at described electronic installation, controls described the first transistor and switches, and drives signal to transmit described replacement; And
One transistor seconds, it couples described reference edge and described reset cell, and drives signal and switch according to described replacement, allows described reset cell couple described reference edge through described transistor seconds, with the described electronic installation of resetting.
9. removing circuit as claimed in claim 7 is characterized in that, described Resetting Switching unit comprises:
One transistor, it couples described reference edge and described reset cell, and drives signal and switch according to described replacement, allows described reset cell be coupled to described reference edge through described transistor, to order about the described reset cell described electronic installation of resetting.
10. removing circuit as claimed in claim 7 is characterized in that, the removing circuit of described storer more comprises:
One replacement light source, it produces described replacement light; And
One replacement driver element, it couples described replacement light source, produces described replacement light to drive described replacement light source.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW101111280A TWI464746B (en) | 2012-03-30 | 2012-03-30 | A clearing circuit for memory |
| TW101111280 | 2012-03-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103365387A true CN103365387A (en) | 2013-10-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101172580A Pending CN103365387A (en) | 2012-03-30 | 2012-04-19 | Clearing circuit of memory |
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| Country | Link |
|---|---|
| CN (1) | CN103365387A (en) |
| TW (1) | TWI464746B (en) |
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| CN110069211A (en) * | 2018-01-23 | 2019-07-30 | 纬创资通股份有限公司 | Data management circuit |
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| CN2735426Y (en) * | 2004-07-15 | 2005-10-19 | 联想(北京)有限公司 | Real-time clock feed circuit capable of clearing CMOS settings |
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| Publication number | Priority date | Publication date | Assignee | Title |
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Also Published As
| Publication number | Publication date |
|---|---|
| TW201340115A (en) | 2013-10-01 |
| TWI464746B (en) | 2014-12-11 |
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