CN103325409B - The storage card of tool intelligent card function and power control method thereof and power control circuit - Google Patents
The storage card of tool intelligent card function and power control method thereof and power control circuit Download PDFInfo
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Abstract
A kind of storage card of tool intelligent card function and power control method thereof and power control circuit.The storage card of this tool intelligent card function, comprises a flash memory cells, a data processing control units and a power control unit.Data processing control units is coupled to flash memory cells.Data processing control units controls flash memory cells, and encryption and decryption and storage one smart card security data.Power control unit is coupled to data processing control units and flash memory cells.Power control unit receive one first power supply input with a second source input both at least one of them.Power control unit is selected to provide the first power supply input or second source to input to data processing control units according at least one control signal, and an output terminal of power control unit is coupled to the first power supply input.In addition, a kind of power control method of said memory card and power control circuit thereof are also suggested.
Description
Technical field
The present invention relates to a kind of power control method and power control circuit, and in particular to a kind of storage card of tool intelligent card function and power control method thereof and power control circuit.
Background technology
Along with user accepts to use stored value card and prepayment Stored Value gradually, make the use of smart card day by day universal.Smart card (SmartCard) is the integrated circuit (IC) chip (IC chip) of the assembly with such as microprocessor, card operation system, security module and storer, performs scheduled operation to allow holder.Smart card provides calculating, encryption, two-way communication and security function, makes this card can also reach the function protected its data stored except storing the function of data.Use one of them exemplary applications that subscriber identification module (SubscriberIdentificationModule, the SIM) card used in the machine-processed cellular phone of global system for mobile communications (GSM) is smart card.In general, smart card itself is limited to the specification of its integrated circuit, and therefore memory capacity is limited.
Storage card (MEMORYCARD) is a kind of data storage device, and it is generally using NAND quick-flash memory as storage medium.NAND quick-flash memory has and can write, can erase and still can preserve the advantage of data after power-off, in addition, along with the improvement of manufacturing technology, NAND quick-flash memory has that volume is little, access speed fast, with the advantage such as power consumption is low.Therefore, these those skilled in the art attempt being combined with jumbo storage card by smart card, with the memory capacity of the smart card that increases in recent years.
In general, if user wants the data in accessing memory card must be accessed by card reader, therefore smart card is being bonded in the application of storage card, is also only reading the data in storage card and smart card by card reader with contact (contact).Such as, but along with the development of wireless near field communication (NearFieldCommunication, NFC), many contactless (contactless) induction technology has been widely used in life, rapid transit ticket card, access card etc.
Therefore, combined with intelligent card the storage card having contactless access facility concurrently just arise at the historic moment, such as, have micro-safety digital storage card (MicroSecureDigital, MicroSD) of intelligent card function.This kind of storage card receives different power supplys when being read by the reading device in host computer system in varied situations and inputs, if therefore the smart card circuitry of storage card inside is selected when one is powered cannot normally work in the input times of different power supplys, will greatly limit its range of application.
Summary of the invention
The invention provides a kind of storage card with intelligent card function, different power supplys input appoint select one power time, the smart card circuitry of its inside can normally work.
The invention provides a kind of power control method of storage card, the method can make the dual power supply of the storage card of tool intelligent card function appoint to select one to power, and now the smart card circuitry of storage card inside can normally work.
The invention provides a kind of power control circuit, be suitable for being applied in an electronic circuit.Different power supplys input appoint select one input so far electronic circuit time, this electronic circuit can normally work.
The present invention proposes a kind of storage card of tool intelligent card function, comprises a flash memory cells, a data processing control units and a power control unit.Data processing control units is coupled to flash memory cells.Data processing control units controls flash memory cells, and encryption and decryption and storage one smart card security data.Power control unit is coupled to data processing control units and flash memory cells.Power control unit receive one first power supply input with a second source input both at least one of them.Power control unit is selected to provide the first power supply input or second source to input to data processing control units according at least one control signal, and an output terminal of power control unit is coupled to the first power supply input.
In one embodiment of this invention, above-mentioned power control unit comprises one first power supply service duct and a second source service duct.First power supply service duct in order to receive the first power supply input, and determines whether providing the first power supply to input to data processing control units according to one first control signal.Second source service duct in order to receive second source input, and determines whether providing second source to input to data processing control units according to one second control signal.First control signal changes its state, to control the first power supply service duct in response to the first power supply input.
In one embodiment of this invention, the first above-mentioned power supply service duct comprises one first on-off element and a signal receiving unit.First on-off element has a first end, one second end and a control end.First end receives the first power supply input; Second end is coupled to the output terminal of power control unit.Signal receiving unit has an input end and an output terminal.Input end receives the first power supply input and is treated to the first control signal; Output terminal is coupled to the control end of the first on-off element, and exports the first control signal.
In one embodiment of this invention, above-mentioned signal receiving unit comprises a reverser.Reverser has input end and output terminal.Input end receives the first power supply input, and is reversed the first control signal.Output terminal is coupled to the control end of the first on-off element, and exports the first control signal.
In one embodiment of this invention, above-mentioned second source service duct comprises a second switch element.Second switch element has a first end, one second end and a control end.First end receives second source input; Second end is coupled to the output terminal of power control unit; Control end is in order to receive the second control signal.
In one embodiment of this invention, above-mentioned power control unit also comprises a voltage limiting unit.Voltage limiting unit is coupled between first and second power supply service duct, a revers voltage in order to suppress the first power supply service duct to feed back to second source service duct is less than a particular value, or is less than particular value in order to the revers voltage suppressing second source service duct to feed back to the first power supply service duct.
In one embodiment of this invention, above-mentioned voltage limiting unit comprises one first diode and one second diode.First diode has an anode and a negative electrode.Anode is coupled to the first power supply input; Negative electrode is coupled to the first on-off element.Second diode has an anode and a negative electrode.Anode is coupled to second source input; Negative electrode is coupled to second switch element.
In one embodiment of this invention, above-mentioned power control unit comprises a partial pressure unit.Partial pressure unit has a first end, one second end and a divider node.First end is coupled to the first power supply input; Second end is coupled to ground.Partial pressure unit carries out dividing potential drop to the first power supply input, and provides the first power supply after dividing potential drop to input to the output terminal of power control unit via divider node.
In one embodiment of this invention, above-mentioned partial pressure unit comprises one first resistance, and its one end as the first end of partial pressure unit, and is coupled to the first power supply input.The other end of the first resistance as divider node, and provides the first power supply after dividing potential drop to input to the output terminal of power control unit.Second resistance and the first resistant series couple.One end of second resistance is coupled to the other end of the first resistance, the other end of the second resistance as partial pressure unit the second end and be coupled to ground.
In one embodiment of this invention, above-mentioned data processing control units comprises a memorizer control circuit and a smart card circuitry.Memorizer control circuit couples flash memory cells, and controls flash memory cells.Smart card circuitry is coupled to memorizer control circuit, and encryption and decryption and storage one smart card security data.Smart card circuitry receives smart card security data from a host computer system or sends handled smart card security data to host computer system by memorizer control circuit.Power control unit is selected to provide the first power supply input or second source to input to smart card circuitry.
In one embodiment of this invention, above-mentioned flash memory cells also stores smart card security data.
In one embodiment of this invention, the first above-mentioned power supply input provided by a storage card reading device; Second source input provided by a wireless near field communication reading device.
The present invention proposes a kind of power control method of storage card.Storage card comprises a power control unit and a data processing control units.Power control method comprises the steps.Receive one first power supply input with a second source input both at least one of them.According at least one control signal, select to provide the first power supply input or second source to input to a smart card circuitry in data processing control units.One output terminal of power control unit is coupled to the first power supply input.
In one embodiment of this invention, the step that above-mentioned selection provides the first power supply input or second source to input to smart card circuitry comprises and determines whether providing the first power supply to input to data processing control units according to one first control signal.First control signal changes its state in response to the first power supply input, to control the supply of the first power supply input.
In one embodiment of this invention, the step that above-mentioned selection provides the first power supply input or second source to input to smart card circuitry also comprises reverse first power supply input as the first control signal, to control the supply of the first power supply input.
In one embodiment of this invention, the step that above-mentioned selection provides the first power supply input or second source to input to smart card circuitry also comprises and determines whether providing second source to input to data processing control units according to one second control signal.First power supply input is as the second control signal.
In one embodiment of this invention, above-mentioned power control method also comprises the revers voltage that suppression first power supply input feedback inputs to second source and is less than a particular value.
In one embodiment of this invention, above-mentioned power control method also comprises the revers voltage suppressing second source input feedback to the first power supply to input and is less than particular value.
In one embodiment of this invention, above-mentioned power control method also comprises and carries out dividing potential drop to the first power supply input, and provides the first power supply after dividing potential drop to input to the output terminal of power control unit.
The present invention proposes a kind of power control circuit, comprises one first power supply service duct, one first power supply service duct and a voltage limiting unit.First power supply service duct in order to receive one first power supply input, and determines whether providing the first power supply to input to a data processing control units according to one first control signal.Second source service duct in order to receive a second source input, and determines whether providing second source to input to data processing control units according to one second control signal.Voltage limiting unit is coupled between first and second power supply service duct, a revers voltage in order to suppress the first power supply service duct to feed back to second source service duct is less than a particular value, or the revers voltage suppressing second source service duct to feed back to the first power supply service duct is less than particular value.
In one embodiment of this invention, the voltage turn-on loss that the first above-mentioned power supply input or second source input to data processing control units is less than 0.15 volt.
In one embodiment of this invention, above-mentioned particular value be not more than corresponding power supply input 60% or 1 volt.
Based on above-mentioned, storage card provided by the present invention has intelligent card function, can carry out wireless near field communication.Further, the power control method provided can make this storage card when dual power supply appoint select one power, the smart card circuitry of its inside all can normally work.
For above-mentioned feature and advantage of the present invention can be become apparent, special embodiment below, and coordinate accompanying drawing to be described in detail below.
Accompanying drawing explanation
Fig. 1 is the schematic block diagram of storage card and its host computer system illustrated according to the present invention one exemplary embodiment.
Fig. 2 is the schematic block diagram of the power control unit illustrated according to the present invention one exemplary embodiment.
Fig. 3 is the synoptic circuit diagram of the power control unit illustrated according to the present invention one exemplary embodiment.
Fig. 4 is the flow chart of steps of the power control method of the storage card of one embodiment of the invention.
Fig. 5 is the flow chart of steps of the power control method of the storage card of another embodiment of the present invention.
[main element symbol description]
100: host computer system
110: storage card reading device
120: wireless near field communication reading device
200: storage card
210: flash memory cells
220: data processing control units
222: memorizer control circuit
224: smart card circuitry
230,330: power control unit
232,332: the first power supply service ducts
234,334: second source service duct
236,336: voltage limiting unit
238,338: partial pressure unit
333: signal receiving unit
Ctrl1: the first control signal
Ctrl2: the second control signal
P1: the first power supply input
P1 ': the first power supply input after dividing potential drop
P2: second source inputs
OUT: the output terminal of power control unit
Q1: the first on-off element
Q2: second switch element
D1: the first diode
D2: the second diode
N: divider node
R1: the first resistance
R2: the second resistance
S400, S402, S404, S406, S408, S500, S502, S504: the step of power control method
Embodiment
Fig. 1 is the schematic block diagram of storage card and its host computer system illustrated according to the present invention one exemplary embodiment.Please refer to Fig. 1, the host computer system 100 of this exemplary embodiment comprises storage card reading device 110 and a radio communication reading device 120.At this, host computer system 100 is such as a portable electronic communications device (such as mobile phone, flat computer), but the present invention is not limited to this.In this exemplary embodiment, storage card 200 comprises flash memory cells 210, data processing control units 220 and a power control unit 230.Data processing control units 220 comprises memorizer control circuit 222 and a smart card circuitry 224.Memorizer control circuit 222 couples flash memory cells 210.Smart card circuitry 224 coupled memory control circuit 222.Storage card 200 is such as one microampere of digital (MicroSD) storage card, and its combined with intelligent card also has contactless access facility concurrently.Therefore, the storage card reading device 110 of this exemplary embodiment is such as one microampere of digital storage card reading device.In addition, in this exemplary embodiment, flash memory cells 210, data processing control units 220 and power control unit 230 can be implemented with one chip individually, or also all functions can be incorporated in one chip and realize.
Storage card reading device 110 is in order to identify the data layout that meets SD specification and to convert the form that host computer system 100 can identify to.Specifically, the storage card reading device 110 of the present embodiment is in order to connect storage card 200, storage card 200 is such as be inserted in storage card reading device 110 in a detachable fashion, accesses by storage card reading device 110 to make host computer system 100 to inserted storage card 200.In this exemplary embodiment, storage card 200 can be inserted into storage card reading device 110 by user, to be connected with host computer system 100, carries out contact (contact) communication meeting ISO7816-3 standard.Such as, the storage card 200 with financial smart card secure data can be inserted into storage card reading device 110 and be carried out paying behavior that line is done shopping by host computer system 100 and internet (Internet) by user.
Radio communication reading device 120 can in order to receive and dispatch RF signal, with with reading device (such as RF reader, do not illustrate) carry out data transmission, the mode of data transmission is such as meet wireless near field communication specification (NearFieldCommunication, NFC) or other kind radio communication specifications.That is, in this exemplary embodiment, storage card 200 can be inserted into storage card reading device 110 and utilize wireless near field communication reading device 120 and other contactless reading devices to carry out meeting contactless (contactless) wireless near field communication of ISO14443 standard by user.Such as, the storage card 200 with rapid transit ticket smart card security data can be inserted into storage card reading device 110 by user.Communicate with the reading device being configured in rapid transit station when taking rapid transit and to pay in contactless mode, or the storage card 200 with financial smart card secure data can be inserted into storage card reading device 110 and communicate with the reading device being configured in hotel owner when relevant hotel owner (such as, refuelling station, convenience store) does shopping and to pay in contactless mode by user.
Data processing control units 220 is in order to the running of control store card 200, and it utilizes memorizer control circuit 222 to control flash memory cells 210, and utilizes smart card circuitry 224 encryption and decryption and store smart card security data.In this exemplary embodiment, smart card circuitry 224 is such as a Universal Integrated Circuit Card (UniversalIntegratedCircuitCard, UICC), stores and comprises the information such as user profile, golden key password, way of paying.Smart card circuitry 224 receives smart card security data from host computer system 100 or sends handled smart card security data to host computer system 110 (or sending main frame to by a wireless messages transmitting element) by memorizer control circuit 222.In general, because the data security of smart card circuitry 224 is quite high, therefore use the smart card security data handled by smart card circuitry 224 to can be used as the application such as authentication, small amount payment.Such as, these smart card security data are public transportation ticket data, finance data etc.In exemplary embodiment of the present invention, the interface (interface) of smart card circuitry 224 meets ISO7816-3 and ISO14443 standard.But the present invention is not limited thereto, smart card circuitry 224 also can be the data protection schemes that other safe classes are higher.It is worth mentioning that, the encryption that smart card circuitry 224 uses, decryption method are for meeting advanced encryption standard (AdvancedEncryptionStandard, AES), data encryption standards (DataEncryptionStandard, DES), three-phase data encryption standard (TripleDataEncryptionStandard, 3DES), rivest, shamir, adelman (RivestShamirAdleman, RSA).
Flash memory cells 210 carrys out the data of host system 100 for write in order to the instruction according to host computer system 100 under the control of memorizer control circuit 222.Specifically, after storage card 200 is inserted into storage card reading device 110 by user, host computer system 100 assigns access instruction (such as by storage card reading device 110 pairs of memorizer control circuits 222, write instruction, reading command etc.), and memorizer control circuit 222 can carry out operating flash memory cell 210 according to the instruction received, and then write the data of reception from host computer system 100 or transmit data to host computer system 100.
Such as, in this exemplary embodiment, memorizer control circuit 222 comprise controlling the microprocessor unit of overall operation, the memory buffer in order to temporal data, the flash memory interface module in order to access flash memory cell 210, in order to communicate with storage card reading device 110 microampere all-digital interface module, can the interface module of access smartcard circuit 224 and bug check and correction module etc. (not illustrating).
In this exemplary embodiment, the microprocessor unit of memorizer control circuit 222 can identify that the instruction that receives via storage card reading device 110 and data to be directly sent to the general instruction of flash memory cells 210 and data or the smart card instruction that must be processed by smart card circuitry 224 and smart card security data, and performs write data to flash memory cells 210 or running instruction and data being assigned to smart card circuitry 224 according to judged result.In addition, as previously mentioned, in smart card circuitry 224 because of its specification under making its memory capacity limited, in this exemplary embodiment, the smart card security data of intelligent cards chip 224 can be stored under the management of memorizer control circuit 222 can in the large flash memory cells 210 of memory capacity relatively intelligent card chip 224 itself.
Power control unit 230 is coupled to data processing control units 220 and flash memory cells 210.Power control unit 230 receive one first power supply input P1 and a second source input P2 at least one of them.Power control unit 230, according at least one control signal (not illustrating), is selected to provide the first power supply input P1 or second source input P2 to smart card circuitry 224.In this exemplary embodiment, the first power supply input P1 provided by storage card reading device 110; Second source input P2 provided by wireless near field communication reading device 120, but the present invention is not limited to this, and what the first power supply input and second source input can be various types can electric supply installation.
Specifically, if when host computer system 100 is in normal manipulation mode, provide the first power supply to input P1 to smart card circuitry 224 by storage card reading device 110, now the first power supply input P1 is such as 3.3 volts, the design of the power control unit 230 of this exemplary embodiment of arranging in pairs or groups, smart card circuitry 224 can normally work.Another kind of operator scheme is to read host computer system 100 with wireless near field communication reading device.In this kind of operator scheme, providing of P2 of second source input is when close to wireless near field communication dispensing device, and host computer system 100 detects the signal of wireless near field communication reading device and determines to receive second source input P2.Now second source input P2 is such as 1.8 volts, and the design of the power control unit 230 of this exemplary embodiment of arranging in pairs or groups, smart card circuitry 224 also can normally work.In other words, in this exemplary embodiment, when storage card reading device 110 or one of them power supply of wireless near field communication reading device 120, smart card circuitry 224 can normally work.
Furthermore, Fig. 2 is the schematic block diagram of the power control unit illustrated according to the present invention one exemplary embodiment.Please refer to Fig. 2, the power control unit 230 of this exemplary embodiment comprises one first power supply service duct 232, second source service duct 234, voltage limiting unit 236 and a partial pressure unit 238.
First power supply service duct 232 receives the first power supply input P1, and determines whether providing the first power supply input P1 to smart card circuitry 224 according to one first control signal Ctrl1.In this exemplary embodiment, the first control signal Ctrl1 changes its state, to control the first power supply service duct 232 in response to the first power supply input P1.At this, the first control signal Ctrl1 inputs the reverse gained of P1 by the first power supply, but the present invention is not limited to this.In another exemplary embodiment, by power control unit, it can judge that the first power supply inputs P1 higher than providing one during a predetermined voltage level in order to the first power supply is inputted the first control signal Ctrl1 of P1 to smart card circuitry 224.On the other hand, second source service duct 234 receives second source input P2, and determines whether providing second source to input P2 to smart card circuitry 224 according to one second control signal Ctrl2.In this exemplary embodiment, the first power supply input P1 is such as the second control signal Ctrl2 whether to control second source service duct 234 conducting, but the present invention is not limited to this.In another exemplary embodiment, by power control unit, it can judge that second source inputs P2 higher than the second control signal Ctrl2 providing to input to smart card circuitry 224 in order to second source to be inputted P2 during a predetermined voltage level, and by the first control signal Ctrl1 that the first power supply service duct 232 ends.
Voltage limiting unit 236 is coupled between the first power supply service duct 232 and second source service duct 234, a revers voltage in order to suppress the first power supply service duct 232 to feed back to second source service duct 234 is less than a particular value, and the revers voltage suppressing second source service duct 234 to feed back to the first power supply service duct 232 is less than particular value.In the present embodiment, this particular value be not more than corresponding power supply input 60% or 1 volt.Such as, when the first power supply service duct 232 provides the first power supply input P1, this particular value is not more than 60% of the first power supply input P1, namely 0.6 times.Furthermore, when storage card reading device 110 is powered, the first power supply input P1 of 3.3 volts exports smart card circuitry 224 to via the first power supply service duct 232, at the same time, first power supply service duct 232 also can provide revers voltage to feed back to second source service duct 234, and then affects second source input P2.Therefore, in this exemplary embodiment, such as the UICC codes and standards of smart card circuitry 224 to meet, the revers voltage that this exemplary embodiment collocation voltage limiting unit 236 can suppress the first power supply service duct 232 to feed back is about 0.3 volt, it is less than 0.5 volt, but the present invention is not limited to this, the restriction of the feedback revers voltage between this power supply service duct requires to order according to the demand of deviser.In this instance, actual be provided to smart card circuitry 224 first power supply input P1 be about 3.28 volts, therefore this exemplary embodiment first power supply input P1 input to data processing control units 220 voltage turn-on loss be less than 0.15 volt.
Otherwise, when wireless near field communication reading device 120 provides the second source input P2 of 1.8 volts, second source service duct 234 also can provide revers voltage to feed back to the first power supply service duct 232, the voltage limiting unit 236 of this exemplary embodiment of arranging in pairs or groups, the revers voltage that also second source service duct 234 can be suppressed to feed back is less than 0.5 volt.In other words, the design architecture of this exemplary embodiment, except the object of selecting a power supply except reaching dual power supply, when the input of either party power supply does not exist, the revers voltage fed back is about 0.3 volt, is less than 0.5 volt, meets the codes and standards of UICC.In this instance, the actual second source input P2 being provided to smart card circuitry 224 is about 1.78 volts, and the voltage turn-on loss that therefore the second source input P2 of this exemplary embodiment inputs to data processing control units 220 is also less than 0.15 volt.
Partial pressure unit 238 carries out dividing potential drop to the first power supply input P1, and provides the first power supply input P1 ' after dividing potential drop to the output terminal OUT of power control unit 230 via its divider node.In other words, first power supply input P1 is coupled to the output terminal OUT of power control unit 230 after dividing potential drop, therefore, the output voltage of power control unit 230 can input P1 interlock with the first power supply, namely when the first power supply input P1 is 3.3 volts, output is 3.3 volts, otherwise is then 1.8 volts.This exemplary embodiment by the design of this kind of interlock, can avoid by second source input P2 switch to the first power supply input P1 time, cause the voltage drop to 1.8 volt of the first power supply input P1 or the faulty operation of 0 volt.In this exemplary embodiment, power control unit 230 comprises partial pressure unit 238, and in other exemplary embodiment, partial pressure unit 238 optionally can configure according to actual design demand, that is power control unit optionally comprises or do not comprise partial pressure unit.
Fig. 3 is the synoptic circuit diagram of the power control unit illustrated according to the present invention one exemplary embodiment.Please refer to Fig. 3, the first power supply service duct 332 of this exemplary embodiment comprises one first on-off element Q1 and a signal receiving unit 333.In this exemplary embodiment, the first on-off element Q1 is such as with a transistor unit, and as P-type mos field-effect transistor (P-MOSFET) realizes, but the present invention is not limited to this.First on-off element Q1 has a first end, one second end and a control end, therefore the first end of the first on-off element Q1, the second end and the control end source electrode of corresponding P-type mos field-effect transistor, drain electrode and grid respectively.The first end of the first on-off element Q1 receives the first power supply input P1; Second end of the first on-off element Q1 is coupled to the output terminal OUT of power control unit; The control end of the first on-off element Q1 is coupled to signal receiving unit 333, to receive the first control signal Ctrl1.Signal receiving unit 333 has an input end and an output terminal.Input end receives the first power supply input P1 and is treated to the first control signal Ctrl1; Output terminal is coupled to the control end of the first on-off element Q1, and exports the first control signal Ctrl1 to the first on-off element Q1, to control its conducting state.In this instance, signal receiving unit 333 comprises a reverser, and therefore signal receiving unit 333 is by reverse for the first power supply input P1, and as the first control signal Ctrl1.
Second source service duct 334 comprises a second switch element Q2.In this exemplary embodiment, second switch element Q2 realizes with a P-type mos field-effect transistor, but the present invention is not limited to this.Second switch element Q2 has a first end, one second end and a control end, therefore the first end of second switch element Q2, the second end and the control end source electrode of corresponding P-type mos field-effect transistor, drain electrode and grid respectively.The first end of second switch element Q2 receives second source input P2; Second end of second switch element Q2 is coupled to the output terminal OUT of power control unit; Control end receives the first power supply input P1 as the second control signal Ctrl2.
In this exemplary embodiment, first on-off element Q1 and second switch element Q2 realizes with P-type mos field-effect transistor, this kind of design architecture, the loss of its voltage turn-on is about 0.02 volt, inputting P1 at the first power supply is 3.3 volts, second source input P2 is in the embodiment of 1.8 volts, can guarantee that the magnitude of voltage of the first power supply input P1 that the first power supply service duct 332 exports is about 3.28 volts, guarantee that the magnitude of voltage of the second source input P2 that second source service duct 334 exports is about 1.78 volts simultaneously, meet the codes and standards of UICC.The magnitudes of voltage such as above-mentioned 0.02 volt, 3.3 volts, 3.28 volts, 1.8 volts and 1.78 volts are only in order to illustrate, and the present invention is not limited to this.
Voltage limiting unit 336 comprises one first diode D1 and one second diode D2.The anode of the first diode D1 is coupled to the first power supply input P1; Negative electrode is coupled to the first end of the first on-off element Q1.The anode of the second diode D2 is coupled to second source input P2; Negative electrode is coupled to the first end of second switch element Q2.The revers voltage that this kind of circuit design framework can suppress the first power supply service duct 332 and second source service duct 334 to feed back all is less than 0.5 volt.In this exemplary embodiment, when the input of either party power supply does not exist, the revers voltage that each passage feeds back such as is about 0.3 volt, meets the codes and standards of UICC.The magnitudes of voltage such as above-mentioned 0.3 volt and 0.5 volt are only in order to illustrate, and the present invention is not limited to this.
In this exemplary embodiment, partial pressure unit 338 has a first end, one second end and a divider node N.First end is coupled to the first power supply input P1; Second end is coupled to ground.Partial pressure unit 338 carries out dividing potential drop to the first power supply input P1, and provides the first power supply input P1 after dividing potential drop to the output terminal OUT of power control unit via divider node N.The partial pressure unit 338 of this exemplary embodiment is implemented by the first resistance R1 of coupled in series and the second resistance R2.One end of first resistance R1 as the first end of partial pressure unit 338, and is coupled to the first power supply input P1.The other end of the first resistance R1, as divider node N1, inputs the output terminal OUT of P1 ' to power control unit 330 to provide the first power supply after dividing potential drop.One end of second resistance R2 is coupled to the other end of the first resistance R1, the other end of the second resistance as partial pressure unit 338 the second end and be coupled to ground.The output terminal OUT that partial pressure unit 338 will provide the first power supply input P1 ' after dividing potential drop to power control unit 330, this exemplary embodiment is by the design of this kind of interlock, can avoid by second source input P2 switch to the first power supply input P1 time, cause the voltage drop to 1.8 volt of the first power supply input P1 or the faulty operation of 0 volt.
Fig. 4 is the flow chart of steps of the power control method of the storage card of one embodiment of the invention.Referring to Fig. 1, Fig. 2 and Fig. 4, the power control method of the present embodiment is at least applicable to the storage card illustrated in Fig. 1 to Fig. 3, and it comprises the steps.In step S400, at least receive the first power supply input P1.In this exemplary embodiment, host computer system 100 is such as be in normal manipulation mode, provides the first power supply to input P1 to power control unit 230 by storage card reading device 110, and now the first power supply input P1 is such as 3.3 volts.In other exemplary embodiment, step S400 also can comprise reception second source input P2.Then, in step S402, dividing potential drop is carried out to the first power supply input P1, and the first power supply input P1 ' to the output terminal OUT of power control unit 230 and the first power supply service duct 232 after dividing potential drop is provided.Afterwards, in step s 404, the first power supply after reverse dividing potential drop inputs P1 ' as the first control signal Ctrl1, to control the supply of the first power supply input P1.In this step, if power control unit 230 does not optionally configure partial pressure unit 238, be not then reversed person and be the first power supply input P1.Then, in step S406, according to the first control signal Ctrl1, select to provide the first power supply input P1 to the smart card circuitry 224 in data processing control units 220.Then, in step S408, the revers voltage suppressing the first power supply input P1 to feed back to second source input P2 is less than particular value.In step S400, if institute recipient comprises second source input P2, then step S408 also comprises the revers voltage suppressing second source input P2 to feed back to the first power supply input P1 and is less than this particular value.
Fig. 5 is the flow chart of steps of the power control method of the storage card of another embodiment of the present invention.Referring to Fig. 1, Fig. 2 and Fig. 5, the power control method of the present embodiment is at least applicable to the storage card illustrated in Fig. 1 to Fig. 3, and it comprises the steps.In step S500, receive second source input P2.In this exemplary embodiment, providing of P2 of second source input is when close to wireless near field communication dispensing device, and host computer system 100 detects the signal of wireless near field communication reading device and determines to receive second source input P2.Now, provide second source to input P2 to power control unit 230 by wireless near field communication reading device 120, storage card reading device 110 is not powered, and the first power supply input P1 system is in low level state in other words.Then, in step S502, according to the second control signal Ctrl2, select to provide second source to input P2 to the smart card circuitry 224 in data processing control units 220.In this step, the first power supply input P1 carrys out conducting second source service duct 234 as the second control signal Ctrl2.Afterwards, in step S504, the revers voltage suppressing second source input P2 to feed back to the first power supply input P1 is less than particular value.
In addition, the power control method of embodiments of the invention can obtain enough teachings, suggestion and implementation by the describing of Fig. 1 to Fig. 3 embodiment, and therefore repeats no more.
In sum, in exemplary embodiment of the present invention, storage card has intelligent card function, can carry out wireless near field communication.Further, the power control method provided can make this storage card when dual power supply appoint select one power, the smart card circuitry of its inside all can normally work.In addition, utilize the design architecture of voltage limiting unit, fed back revers voltage can be suppressed to be less than particular value to meet design specifications when the input of either party power supply does not exist.Meanwhile, by the design of power supply input with the output terminal interlock of power control unit, the faulty operation of the voltage drop caused when power supply input can be avoided to switch.
Although the present invention with embodiment openly as above; so itself and be not used to limit the present invention; without departing from the spirit and scope of the present invention, when doing a little change and retouching, therefore protection scope of the present invention is when being as the criterion depending on the appended claims person of defining for those skilled in the art.
Claims (21)
1. there is a storage card for intelligent card function, comprising:
One flash memory cells;
One data processing control units, is coupled to this flash memory cells, controls this flash memory cells, and encryption and decryption and storage one smart card security data; And
One power control unit, is coupled to this data processing control units and this flash memory cells, receive one first power supply input with a second source input both at least one of them,
Wherein this power control unit is selected to provide the input of this first power supply or this second source to input to this data processing control units according at least one control signal,
Wherein the first power supply input of this first power supply input by dividing potential drop and after dividing potential drop is coupled to an output terminal of this power control unit,
Wherein this power control unit comprises:
One first power supply service duct, in order to receive the input of this first power supply; And
One second source service duct, in order to receive the input of this second source, and the first power supply input after this dividing potential drop is in order to this first power supply service duct of conducting or this second source service duct.
2. storage card as claimed in claim 1, wherein this first power supply service duct determines whether providing this first power supply to input to this data processing control units according to one first control signal, and wherein this first control signal is produced by the first power supply input after this dividing potential drop after oppositely; And
This second source service duct determines whether providing this second source to input to this data processing control units according to one second control signal, and wherein this second control signal is produced by the first power supply input after this dividing potential drop,
Wherein this first control signal changes its state, to control this first power supply service duct in response to the input of this first power supply.
3. storage card as claimed in claim 2, wherein this first power supply service duct comprises:
One first on-off element, has a first end, one second end and a control end, and this first end receives the input of this first power supply, and this second end is coupled to this output terminal of this power control unit; And
One signal receiving unit, there is an input end and an output terminal, this input end of this signal receiving unit receives the input of this first power supply, and be treated to this first control signal, this output terminal of this signal receiving unit is coupled to this control end of this first on-off element, and exports this first control signal.
4. storage card as claimed in claim 3, wherein this signal receiving unit comprises:
One reverser, there is this input end and this output terminal of this signal receiving unit, this input end receives the first power supply input after this dividing potential drop, and be reversed this first control signal, this output terminal of this signal receiving unit is coupled to this control end of this first on-off element, and exports this first control signal.
5. storage card as claimed in claim 2, wherein this second source service duct comprises:
One second switch element, there is a first end, one second end and a control end, this first end receives the input of this second source, and this second end is coupled to this output terminal of this power control unit, and this control end of this second switch element is in order to receive this second control signal.
6. storage card as claimed in claim 2, wherein this power control unit also comprises:
One voltage limiting unit, be coupled between this first power supply service duct and this second source service duct, a revers voltage in order to suppress this first power supply service duct to feed back to this second source service duct is less than a particular value, or this revers voltage suppressing this second source service duct to feed back to this first power supply service duct is less than this particular value.
7. storage card as claimed in claim 6, wherein this voltage limiting unit comprises:
One first diode, has an anode and a negative electrode, and this anode is coupled to the input of this first power supply, and this negative electrode is coupled to one first on-off element; And
One second diode, has an anode and a negative electrode, and this anode is coupled to the input of this second source, and this negative electrode is coupled to a second switch element.
8. storage card as claimed in claim 1, wherein this power control unit comprises:
One partial pressure unit, there is a first end, one second end and a divider node, this first end is coupled to the input of this first power supply, this second end is coupled to ground, this partial pressure unit carries out dividing potential drop to the input of this first power supply, and provides this first power supply after dividing potential drop to input to this output terminal of this power control unit via this divider node.
9. storage card as claimed in claim 8, wherein this partial pressure unit comprises:
One first resistance, its one end as this first end of this partial pressure unit, and is coupled to the input of this first power supply, and the other end of this first resistance as this divider node, and provides this first power supply after dividing potential drop to input to this output terminal of this power control unit; And
One second resistance, couples with this first resistant series, and one end of this second resistance is coupled to this other end of this first resistance, the other end of this second resistance as this partial pressure unit this second end and be coupled to ground.
10. storage card as claimed in claim 1, wherein this data processing control units comprises:
One memorizer control circuit, couples this flash memory cells, and controls this flash memory cells; And
One smart card circuitry, is coupled to this memorizer control circuit, and encryption and decryption and these smart card security data of storage,
Wherein this smart card circuitry receives these smart card security data from a host computer system or sends these handled smart card security data to this host computer system by this memorizer control circuit; And this power control unit is selected to provide the input of this first power supply or this second source to input to this smart card circuitry.
11. storage cards as claimed in claim 1, wherein this flash memory cells also stores this smart card security data.
12. storage cards as claimed in claim 1, wherein the input of this first power supply provided by a storage card reading device, and the input of this second source provided by a wireless near field communication reading device.
The power control method of 13. 1 kinds of storage cards, this storage card comprises a power control unit and a data processing control units, and this power control method comprises:
Receive one first power supply input with a second source input both at least one of them;
This first power supply of dividing potential drop inputs and the first power supply input after dividing potential drop is coupled to an output terminal of this power control unit, and
According to one first control signal and one second control signal at least one of them, select to provide this first power supply to input or this second source inputs to a smart card circuitry in this data processing control units;
Wherein this power control unit comprises: in order to receive one first power supply service duct of this first power supply input, and in order to receive a second source service duct of this second source input, and the first power supply input after this dividing potential drop is in order to produce this first control signal, and the first power supply input after this dividing potential drop is in order to produce this second control signal.
14. power control methods as claimed in claim 13, wherein select the step providing the input of this first power supply or this second source to input to this smart card circuitry to comprise:
Determine whether providing this first power supply to input to this data processing control units according to this first control signal, wherein this first control signal changes its state in response to the input of this first power supply, to control the supply of this first power supply input.
15. power control methods as claimed in claim 14, wherein select the step providing the input of this first power supply or this second source to input to this smart card circuitry also to comprise:
The first power supply oppositely after this dividing potential drop inputs as this first control signal, to control the supply of this first power supply input.
16. power control methods as claimed in claim 14, wherein select the step providing the input of this first power supply or this second source to input to this smart card circuitry also to comprise:
Determine whether providing this second source to input to this data processing control units according to this second control signal, the first power supply input wherein after this dividing potential drop is as this second control signal.
17. power control methods as claimed in claim 13, also comprise:
The revers voltage suppressing this first power supply input feedback to this second source to input is less than a particular value.
18. power control methods as claimed in claim 17, also comprise:
This revers voltage suppressing this second source input feedback to input to this first power supply is less than this particular value.
19. 1 kinds of power control circuits, comprising:
One first power supply service duct, in order to receive one first power supply input, and determines whether providing this first power supply to input to a data processing control units according to one first control signal;
One second source service duct, in order to receive a second source input, and determines whether providing this second source to input to this data processing control units according to one second control signal;
One voltage limiting unit, be coupled between this first power supply service duct and this second source service duct, a revers voltage in order to suppress this first power supply service duct to feed back to this second source service duct is less than a particular value, or this revers voltage suppressing this second source service duct to feed back to this first power supply service duct is less than this particular value; And
One partial pressure unit, be coupled to the input of this first power supply, in order to the input of this first power supply of dividing potential drop the first power supply input after dividing potential drop is coupled to an output terminal of a power control unit, and the first power supply input after this dividing potential drop is in order to produce this first control signal, and the first power supply input after this dividing potential drop is in order to produce this second control signal.
20. power control circuits as claimed in claim 19, wherein this first power supply input or this second source input to this data processing control units voltage turn-on lose be less than 0.15 volt.
21. power control circuits as claimed in claim 19, wherein this particular value be not more than the input of corresponding power supply 60% or 1 volt.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210077599.XA CN103325409B (en) | 2012-03-22 | 2012-03-22 | The storage card of tool intelligent card function and power control method thereof and power control circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210077599.XA CN103325409B (en) | 2012-03-22 | 2012-03-22 | The storage card of tool intelligent card function and power control method thereof and power control circuit |
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| CN103325409B true CN103325409B (en) | 2016-03-23 |
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| US6600352B2 (en) * | 1999-07-02 | 2003-07-29 | Fujitsu Limited | Timing signal generating circuit |
| CN1595442A (en) * | 2003-09-08 | 2005-03-16 | 株式会社瑞萨科技 | Memory card |
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| US5490117A (en) * | 1993-03-23 | 1996-02-06 | Seiko Epson Corporation | IC card with dual level power supply interface and method for operating the IC card |
| US6600352B2 (en) * | 1999-07-02 | 2003-07-29 | Fujitsu Limited | Timing signal generating circuit |
| CN1595442A (en) * | 2003-09-08 | 2005-03-16 | 株式会社瑞萨科技 | Memory card |
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| CN103325409A (en) | 2013-09-25 |
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