CN1904913A - Smart card for implementing inside power management and power managing method - Google Patents
Smart card for implementing inside power management and power managing method Download PDFInfo
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- CN1904913A CN1904913A CN 200610088984 CN200610088984A CN1904913A CN 1904913 A CN1904913 A CN 1904913A CN 200610088984 CN200610088984 CN 200610088984 CN 200610088984 A CN200610088984 A CN 200610088984A CN 1904913 A CN1904913 A CN 1904913A
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Abstract
The invention relates to an intelligent card to take power supply management in card and the method to manage power supply. The intelligent card includes core chip set carried by PCB and periphery electric units. Power supply unit is set in the card, and the input end of power supply managing unit connects to the power supply outside the card through the power pin on the card, and the output end connects to the power supply pin of periphery electric unit. Thus, the power supply outside the intelligent card would be transformed to the power supply for core chip in card and periphery electric unit. The invention could be used by the device satisfying ISO7816-3 standard. It could supply plural channels (or one channel) of different (or same) voltage working power supply.
Description
Technical field
The invention belongs to integrated circuit (IC) chip/smart card designs technical field, particularly a kind of in the inner method of carrying out the smart card and the power management of power management of card.
Background technology
1970, Frenchman rowland De Moruinuo (Roland Moreno) IC (Integrated Circuit) chip that is provided with of can programming for the first time was put in the card, makes card have more function.He had done following elaboration to this invention in application for patent at that time: have the storer that can carry out self-protection on the card.First intellective IC card in the world so just has been born.
For the integrated circuit smart card, general definition is: be made up of one or more integrated circuit (IC) chip, and be packaged into and be convenient to the card that people carry; Have temporary transient or nonvolatil data storage capacities, its content can read or supply inter-process, judgement for the outside; Have logic and mathematical operation processing power, be used to discern the information that provides with response external and the processing demands of chip itself.
The smart card that we use always roughly divides four kinds: storage card, encryption storage card, CPU card, radio-frequency card.With the digital cellular telephone is example, be to use the CPU card to come canned data and unique identification user identity, the smart card of this particular type often is called as SIM (Subscriber Identity Module, subscriber identification module) card, just because of the ability that smart card provides high capacity to store, telephone directory book can exist card upward rather than as analog telephone to exist on the mobile phone.The security that microprocessor in blocking has in addition improved user account number greatly.
Continuous innovation along with Development of Multimedia Technology and consumer electronics technology, portable electronic product has become the personal entertainment center gradually, increasing audio frequency, video, image, recreation have proposed complicated data processing demand, and have promoted the processing power of CPU significantly to improve.Smart card also has been endowed the more data processing capacity under such background, and the core processor dominant frequency of CPU type smart card is more and more higher, and operating voltage also has been upgraded to applicable to any special chip at this application.Initial ISO7816-3 and EMV (Europay/Master card/Visa) file comprises that now 1.8V, 3.0V and 5.0V are as the working power that is suitable for.Therefore, the physical interface between card and microcontroller is necessary can be adaptive with the main PMU of above-mentioned any power supply and terminal device.
According to ISO/IEC 7816-2 standard, the electrical characteristics of smart card VCC contact are as shown in table 1 under the normal operating condition.
Day by day extensive along with what use, to the telstar receiver, intelligent card interface must be handled big input voltage range and have high-level efficiency from battery powered portable system.For mobile phone,, facilitated the transformation that cell voltage is changed into 3V from 6V or 4.5V energetically in order to respond the pressure that market demands alleviate weight of equipment.Because the component of all mobile phones all can use 3V at present, so mobile phone needs a voltage changer to provide the 5V card the required energy, this has just increased complicacy, and unnecessary cost.Therefore, it is 3V to 5V that present development causes the smart card voltage range, positive and negative 10%, and its effective voltage scope is between 2.7V to 5.5V.Can only be by the demand of terminal device according to different cards, automatically selected required 3V of card or the 5V supply voltage of offering.A kind of possible solution as shown in Figure 1.
The electrical characteristics of smart card VCC contact under table 1 normal operating condition
| Symbol | Condition | Minimum value | Maximal value | Unit |
| Vcc | The category-A category-B | 4.5 2.7 | 5.5 3.3 | V |
| Icc | Category-A at maximum tolerance frequency category-B, stops at maximum tolerance frequency clock | 60 50 0.5 | mA |
In fact, for the smart card terminal equipment of lithium electricity power supply, used the card controller integrated circuit of 3V, from the angle of terminal, its challenge of facing is:
The first, as select the terminal device that is merely able to support the 3V smart card for use, then mean the compatibility that has lost millions of existing 5V smart cards.
The second, if select the terminal device of only supporting the 5V smart card for use, when the 3V smart card inserts this equipment, will be very likely destroyed then.Therefore the user must select terminal carefully, avoids damaging because of maloperation smart card.
The 3rd, because the innovation and the demands of applications of technology, the smart card that has caused different operating voltage is for the simple compatibility of terminal device.General 3V smart card (sim card) on the cell phone apparatus particularly can not be directly connected to such as PC computing machine etc. and only support on the terminal device of 5V power supply, must pass through interconnecting device and could realize and being connected of this kind equipment.
Usually, because bench device adopts the fixed power source power supply, so almost whole desk-top smart card terminal equipment all is the equipment of only supporting the 5V power supply; And owing to portable or handheld-type intelligent card terminal device adopt lithium battery as power supply, therefore, handheld devices such as most of mobile phone all are only to support the terminal device of 3V smart card.Along with the memory function of smart card is become stronger day by day, the user tends to the medium of smart card as data storage and exchange, and with its frequent alternately being connected between handheld device and bench device.For operating voltage is the smart card of 3V, connects only to support the equipment of 5V power supply to finish by interconnecting device.From user's angle,,, will improve the compatibility and the security of smart card so greatly as typical 1.8V, 3V and 5V if smartcard internal can support that the multiplex (MUX) makes voltage.
From the angle of smartcard internal, also produced new problem:
The first, the contradiction of function and power consumption manifests gradually.The function of smart card is become stronger day by day, its power consumption increases sharply thereupon, load current has substantially exceeded the rank of early stage smart card, along with smart card inner core performance of processors promotes, and the load current that complicated a large amount of computings produce even reached up to a hundred milliamperes magnitude.
The second, because the application of new application, particularly multimedia and high capacity storage makes the arithmetic speed of smartcard internal integrated circuit improve constantly, the bus frequency of advanced CPU card has reached the rank of tens megahertzes at present.Under high-frequency like this, the power supply noise of chip internal has produced influence to the signal integrity of circuit, must take measures in smartcard internal, noise is controlled, to improve the signal quality of smartcard internal.Simultaneously, the appearance of noise has also produced influence to power quality, if do not handle targetedly in smartcard internal, its inside can not obtain high-quality power supply with electric device, duty also will descend.
The 3rd, because the continuous increase of smartcard internal integrate circuit function, particularly handheld terminal device is to the demand of high capacity memory property, the smart card product that inner encapsulation polylith integrated circuit (IC) chip occurred, how provide adaptive power supply with electric device, become a new problem for each of smartcard internal.With typical memory element NAND Flash is example, according to the difference of capacity, have the device of multiple operating voltage such as 1.8V, 3V, 5V in the market, this just requires, when smart card is encapsulated in card body inside to jumbo memory component, is necessary for it satisfactory working power is provided.And when other of encapsulation in the card are inequality with the operating voltage of electric device and NAND Flash operating voltage, use the power management scheme outside blocking to be difficult to solve this difficult problem.
The 4th, the progress of semiconductor fabrication process has increased electric power management circuit and main logical circuit has been integrated in difficulty on the chip piece.On the one hand, can be integrated in the Power Management Unit of chip internal, because efficient is on the low side, load capacity is less, can not be adapted to the requirement of multicore sheet power supply in the smart card.On the other hand, the main flow that the processing technology of deep-submicron even Nano grade becomes logical circuit realizes technology, and high performance electric power management circuit also is difficult to realize on such technology.
According to the above, new application requirements smart card can bear the outside 2.7V that supplies with to the 5.5V power supply, and provides multiplex operation voltages such as 1.8V, 3V and 5V simultaneously in card inside; And this management to power supply is not rely on exterior terminal equipment, but realize in smartcard internal.But, want to realize on the logic chip in smart card that power management is very difficult, must seek new solution, realize the power management of smartcard internal.
Summary of the invention
The object of the present invention is to provide a kind of smart card that carries out power management in card inside, can bear the voltage that outside different electrical power is supplied with, and can provide multiplex operation voltage with electric device for the acp chip group and the periphery of inside.Simultaneously, the present invention also will provide the method that realizes power management accordingly in smartcard internal.
In order to realize the foregoing invention purpose, technical scheme provided by the present invention is as follows:
A kind of smart card of realizing power management in inside, comprise acp chip group by the printed circuit board (PCB) carrying, also be provided with Power Management Unit in smartcard internal, the input end of Power Management Unit is connected with card power supply outward by the power contact of smart card, output terminal and smartcard internal acp chip group and periphery are connected with the power pins of electric device, thereby the power source conversion of smart card outside can be become card internal core chipset and peripheral with the electric device required working power of working separately.Described working power can be one or more, and when being the multiplex operation power supply, each road working power can be identical magnitude of voltage (or load value), also different magnitudes of voltage (or load value).
Further, more than said smart card comprise UIM (User Identity Model in SIM card in the gsm system, the cdma system, subscriber identification module) PIM (PersonalIdentity Module, personal identifier module) card in card, the PHS system and USIM (the UniversalSubscriber Identity Module) card in the 3G system.
Furthermore, the aforesaid smart card of realizing power management in inside, wherein, Power Management Unit is a kind of in the middle of linear voltage regulator LDO, DC-DC converter or the boosting charge pump.
The aforesaid smart card of realizing power management in inside wherein, also is provided with the core circuit periphery components and parts that are connected, play the holding circuit effect with the pin of related chip on the printed circuit board (PCB).These core circuit periphery components and parts can be electric capacity, inductance, resistance.
The aforesaid smart card of realizing power management in inside, wherein, Power Management Unit, acp chip group, printed circuit board (PCB) and core circuit periphery components and parts pass through the contact SIM card packing forms overall package of 8 hard contacts in smart card.
Further, described acp chip group comprises: primary processor CPU, multimedia messages coprocessor, high-speed interface controller, the memory device controller, SIM controller, ROM (read-only memory) (ROM), static memory (SRAM), flash memory (FLASH), hardware accelerator.
A kind of method that realizes power management in smartcard internal, this method at first is applied to outer power voltage on the Power Management Unit that is encapsulated in smartcard internal, by Power Management Unit voltage is carried out conversion operations then, the power source conversion of smart card outside is become card internal core chipset and periphery with the electric device required working power of working separately.
Further, described Power Management Unit is a kind of in the middle of linear voltage regulator LDO, DC-DC converter or the boosting charge pump.Power Management Unit comprises the rising of voltage or the reduction of voltage to the conversion operations of voltage.
Beneficial effect of the present invention is: by the smart card of realizing power management in inside provided by the present invention, can the power source conversion that card is outer become card inner core chipset and peripheral working power with electric device; Make smart card directly be connected use, and do not need terminal device that the operating voltage of smart card is judged identification with the terminal device that satisfies the ISO7816-3 standard; Simultaneously; this smart card can be inner acp chip group and the peripheral working power that different (or identical) magnitudes of voltage of multichannel (or a tunnel) (or load value) are provided with electric device; when smart card and forward are above standard the terminal device of power range when being connected; the protection smart card is not burnt; when smart card and negative sense are above standard the terminal device of power range when being connected, keep the operate as normal of smart card.
Description of drawings
Fig. 1 is the constitutional diagram selected of terminal device transaction card supply voltage (a description status machine how the required minimum operating voltage of selection card).
Fig. 2 realizes the method structural representation of power management in smartcard internal.
Fig. 3 is the structural representation of power management module PMU among the embodiment of the present invention.
Fig. 4 realizes the circuit diagram of power management for smartcard internal adopts linear voltage regulator (LDO).
Embodiment
Below in conjunction with drawings and Examples the present invention is done the further detailed description of writing.
As shown in Figure 2, be example with the SIM card, realize smart card 1 specifically composed as follows of power management in inside:
Power Management Unit 2: in smart card 1 inside, the outer power supply of the power contact of its input end by smart card and card is connected, and output terminal and smart card 1 internal core chipset and peripheral power pins with electric device are connected.Power Management Unit 2 should become the power source conversion of smart card 1 outside card internal core chipset and the periphery required power supply of electric device 3 work.
Acp chip group and periphery electric device 3: in smartcard internal, comprise primary processor CPU, the multimedia messages coprocessor, the high-speed interface controller, memory device controller, SIM controller, ROM (read-only memory) (ROM), static memory (SRAM), flash memory (FLASH), other hardware accelerators etc.The acp chip group should be finished the communication function and the information processing function of SIM card, can be made up of chip piece or polylith chip.The acp chip group provides working power by Power Management Unit, and the power supply with the smart card outside directly is not connected.The periphery components and parts are the core circuit peripheral elements that comprise electric capacity, inductance, resistance etc.Can play the effect of holding circuit, be placed in equally on the printed circuit board (PCB), be connected with the pin of related chip, and be encapsulated in smartcard internal.
Printed circuit board (PCB) (PCB): as the supporting body of polylith chip in the smart card, smart card proposed by the invention should comprise a slim printed circuit board (PCB) (PCB), this pcb board should have certain intensity, and thickness can satisfy and is encapsulated in SIM card inside.This pcb board should have suitable wiring, in conjunction with the position that is placed in the polylith chip on the pcb board, needs interconnected pin to connect by printed wire these chips.
Packing forms: the outward appearance of smart card proposed by the invention, meet the relevant regulations of ISO/IEC 7816-1 standard, adopt the contact SIM card packing forms of 8 hard contacts.8 hard contacts can support smart card proposed by the invention to be connected with terminal device.
From smart card external power source environment angle analysis, smart card adopts lithium battery power supply on handheld device, generally is the D.C. regulated power supply power supply on bench device, so the outer power voltage scope of smart card is between the 2.7V to 5.5V.
From smartcard internal acp chip group and peripheral operating voltage analysis with electric device, with the most complicated SOC (SOC (system on a chip)) level chip is example, the circuit voltage of its CPU and master controller part is 2.5V, and the operating voltage of memory circuitry can be 3V or 1.8V.
More than 2 require the power management device in the smart card can pass through power source conversion, be the internal core chipset and peripherally power from external power source with electric device.Simultaneously, because will realize power management, therefore must selection can go up the scheme that realizes at silicon nude film (DIE) in smartcard internal.When just requiring work, this can not have due to voltage spikes can realize again simultaneously accurately adjusting and low ripple.The most important thing is that circuit must satisfy all EMV standards, especially power supply decreasing sequence, power remove sequential and output short circuit current.
Through type selecting, there are 3 class power management devices can satisfy above-mentioned requirements: linear voltage regulator (LDO), DC-DC converter and boosting charge pump (CHARGE PUMP).Wherein:
The noise of linear voltage regulator (LDO) input and output is very little, circuit is simple and easy to realize relatively, but only has the translation function that reduces voltage, only be lower than under the situation of smart card external power source suitable with the operating voltage of electric device at acp chip group and periphery, and along with the increase of input and output voltage difference, conversion efficiency will reduce gradually;
The DC-DC converter can raise and reduce the operation of voltage, be commonly used in the mobile communication terminal device smart card (SIM card) is carried out power management, under the call mode of mobile phone, have usually and be higher than 90% high-level efficiency, but the peripheral connection inductance component that needs, therefore output noise is very big, and circuit is complicated;
The function of charge pump (CHARGE PUMP) is similar to the DC-DC converter, but the periphery does not need to connect inductance, and output noise is little than DC-DC, but efficient is not high usually, only is about 60%.
Present embodiment is an example with the scheme that adopts linear voltage regulator (LDO), has proposed a kind of smart card that can carry out power management in inside.
The pin function (being output as example) of table 2. smartcard internal multiple-output electric power administrative unit with two-way
| The pin sequence number | The pin title | Pin function is described |
| 1 | VIN | The | |
| 2 | | Ground | |
| 3 | EN2 | LDO2 enables input, and logic high is for opening, and logic low is for closing | |
| 4 | EN1 | LDO1 enables input, and logic high is for opening, and logic low is for closing | |
| 5 | VOUT2 | The output of | |
| 6 | VOUT1 | The output of LDO1 voltage |
At first according to Fig. 3, Fig. 4, the applied environment of the present invention is to have the smart card system of two semiconductors with electric device.
Wherein, PMU (U1) is the Power Management Unit of smartcard internal, connects smart card externally fed equipment, for the semiconductor of smartcard internal provides adaptive power supply with electric device; and protect smartcard internal not burnt by electricity with electric device, its structure is as shown in Figure 3.
CONTROLER (U2) is the control chip of smartcard internal, it is other large-scale semiconductive integrated circuit of SOC (system on a chip) (SOC) level, comprise primary processor, multimedia messages coprocessor, high-speed interface controller, the memory device controller, the SIM controller, ROM (read-only memory) (ROM), static memory (RAM), flash memory (FLASH), core logic circuits such as other hardware accelerators.Need 3.0V during operate as normal, positive and negative 10% operating voltage.
NAND_FLASH_X8 (U3) is the smartcard internal storage unit, is semiconductor element, can be integrated in on the chip piece with CONTROLER, and also can adopting independently, silicon nude film (DIE) is encapsulated in the smart card with the CONTROLER chip.Need 1.8V during operate as normal, positive and negative 10% operating voltage.
For guaranteeing the smart card operate as normal, build circuit according to following description:
The input end (VIN) of PMU (U1) is linked to each other with smart card standard contact C1, and ground (GND) links to each other with smart card standard contact C5, and connects the power-supply device of smart card outside by smart card contact;
The enable signal end (EN1/EN2) of PMU (U1) is connected with VIN, so that the output of the two-way of PMU effectively;
The output one (OUT1) of PMU (U1) is connected with the VDD of NAND_FLASH_X8 (U3), the VSS of NAND_FLASH_X8 (U3) is linked to each other with smart card standard contact C5, and provide working power for NAND_FLASH_X8 (U3) by the output one (OUT1) of PMU;
The output two (OUT2) of PMU (U1) is connected with the VDD of CONTROLLER (U2), and the VSS of CONTROLLER (U2) is linked to each other with smart card standard contact C5, and provide working power for CONTROLLER (U2) by the output two (OUT2) of PMU;
The circuit that to build according to above-mentioned connected mode is encapsulated into the smart card with 8 hard contacts, and outward appearance satisfies the relevant regulations of ISO 7816-1, and SIM card seat that can be by the insertion standard is by terminal device identification and operate as normal.Simultaneously, built-in Power Management Unit can be to the chip power supply in the SIM card, and the operating voltage of 1.8V and 3V can be provided respectively.
The smart card external power supply can not directly be connected with electric device with smartcard internal as mentioned above, but powers with electric device for smartcard internal by smartcard internal Power Management Unit PMU (U1).When the smart card external voltage in that 2.7V～5.5V is interval when changing, can be powering of smartcard internal by PMU (U1) with electric device; Exceed in the PMU load in limited time when external voltage exceeds critical field or load current, PMU (U1) will turn-off, and protection smartcard internal acp chip group and peripherally do not burnt by electricity with electric device.
Consider the description of this invention disclosed herein and special embodiment, other embodiment of the present invention are conspicuous for a person skilled in the art.These explanations and embodiment only consider as an example that they all belong to by within the indicated protection scope of the present invention and spirit of claims.
Claims (10)
1. smart card of realizing power management in inside, comprise acp chip group by the printed circuit board (PCB) carrying, it is characterized in that: also be provided with Power Management Unit in smartcard internal, the input end of described Power Management Unit is connected with card power supply outward by the power contact of smart card, output terminal and smartcard internal acp chip group and periphery are connected with the power pins of electric device, thereby the power source conversion of smart card outside can be become card internal core chipset and peripheral with the electric device required working power of working separately.
2. the smart card of realizing power management in inside according to claim 1 is characterized in that: described smart card comprises in SIM card in the gsm system, the cdma system PIM card in UIM card, the PHS system and the usim card in the 3G system.
3. the smart card of realizing power management in inside according to claim 1 and 2 is characterized in that: described Power Management Unit is a kind of in the middle of linear voltage regulator LDO, DC-DC converter or the boosting charge pump.
4. the smart card of realizing power management in inside according to claim 1 and 2 is characterized in that: also be provided with the core circuit periphery components and parts that are connected, play the holding circuit effect with the pin of related chip on the described printed circuit board (PCB).
5. the smart card of realizing power management in inside according to claim 4 is characterized in that: described core circuit periphery components and parts comprise electric capacity, inductance, the resistance that is connected with the related chip pin.
6. the smart card of realizing power management in inside according to claim 5 is characterized in that: Power Management Unit, acp chip group, printed circuit board (PCB) and core circuit periphery components and parts pass through the contact SIM card packing forms overall package of 8 hard contacts in smart card.
7. the smart card of realizing power management in inside according to claim 6, it is characterized in that described acp chip group comprises: primary processor CPU, the multimedia messages coprocessor, the high-speed interface controller, memory device controller, SIM controller, ROM (read-only memory), static memory, flash memory, hardware accelerator.
8. method that realizes power management in smartcard internal, it is characterized in that: this method at first is applied to outer power voltage on the Power Management Unit that is encapsulated in smartcard internal, by Power Management Unit voltage is carried out conversion operations then, the power source conversion of smart card outside is become card internal core chipset and periphery with the electric device required working power of working separately.
9. according to claim 8ly realize it is characterized in that the method for power management in smartcard internal: described Power Management Unit is a kind of in the middle of linear voltage regulator LDO, the DC-DC converter boosting charge pump.
10. according to Claim 8 or 9 describedly realize the methods of power management in smartcard internal, it is characterized in that: Power Management Unit comprises the rising of voltage or the reduction of voltage to the conversion operations of voltage.
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| WO2008080323A1 (en) * | 2006-12-30 | 2008-07-10 | Phoenix Microelectronics (China) Co., Ltd. | Smart card for supporting high performance computation, mass storage, high speed transmission and new application |
| WO2010060343A1 (en) * | 2008-11-28 | 2010-06-03 | Sk Telecom (China) Holding Co., Ltd. | An apparatus and method for starting smartcard |
| CN102137515A (en) * | 2010-01-27 | 2011-07-27 | 国民技术股份有限公司 | IC (Integrated Circuit) card device |
| CN102243716A (en) * | 2010-05-12 | 2011-11-16 | 国民技术股份有限公司 | Storage card and smart card |
| CN102497520A (en) * | 2011-12-07 | 2012-06-13 | 四川长虹电器股份有限公司 | Power supply control system of CI (Conditional Independence) card and CA (Conditional Access) card compatible system and power supply method thereof |
| CN102547424A (en) * | 2012-01-05 | 2012-07-04 | 四川长虹电器股份有限公司 | Method for detecting compatibility of CI card interface and CA card |
| CN102545574A (en) * | 2010-12-27 | 2012-07-04 | 北京中电华大电子设计有限责任公司 | Low-power consumption power network designing method for system on chip (SOC) chip |
| CN102945504A (en) * | 2012-11-19 | 2013-02-27 | 北京宏思电子技术有限责任公司 | Intelligent card and control method thereof |
| WO2014166419A1 (en) * | 2013-04-12 | 2014-10-16 | 中国银联股份有限公司 | Method and terminal device for continuous power supply to external carrier |
| WO2017177655A1 (en) * | 2016-04-15 | 2017-10-19 | 中兴通讯股份有限公司 | Electronic tag, and power supply management method and apparatus for electronic tag |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2008080323A1 (en) * | 2006-12-30 | 2008-07-10 | Phoenix Microelectronics (China) Co., Ltd. | Smart card for supporting high performance computation, mass storage, high speed transmission and new application |
| WO2010060343A1 (en) * | 2008-11-28 | 2010-06-03 | Sk Telecom (China) Holding Co., Ltd. | An apparatus and method for starting smartcard |
| CN101754449B (en) * | 2008-11-28 | 2012-10-10 | 爱思开电讯投资（中国）有限公司 | Device and method for starting intelligent card |
| CN102137515A (en) * | 2010-01-27 | 2011-07-27 | 国民技术股份有限公司 | IC (Integrated Circuit) card device |
| CN102137515B (en) * | 2010-01-27 | 2013-12-18 | 国民技术股份有限公司 | IC (Integrated Circuit) card device |
| CN102243716B (en) * | 2010-05-12 | 2013-11-06 | 国民技术股份有限公司 | Storage card |
| CN102243716A (en) * | 2010-05-12 | 2011-11-16 | 国民技术股份有限公司 | Storage card and smart card |
| CN102545574B (en) * | 2010-12-27 | 2014-05-07 | 北京中电华大电子设计有限责任公司 | Low-power consumption power network designing method for system on chip (SOC) chip |
| CN102545574A (en) * | 2010-12-27 | 2012-07-04 | 北京中电华大电子设计有限责任公司 | Low-power consumption power network designing method for system on chip (SOC) chip |
| CN102497520A (en) * | 2011-12-07 | 2012-06-13 | 四川长虹电器股份有限公司 | Power supply control system of CI (Conditional Independence) card and CA (Conditional Access) card compatible system and power supply method thereof |
| CN102497520B (en) * | 2011-12-07 | 2013-11-06 | 四川长虹电器股份有限公司 | Power supply control system of CI (Conditional Independence) card and CA (Conditional Access) card compatible system and power supply method thereof |
| CN102547424A (en) * | 2012-01-05 | 2012-07-04 | 四川长虹电器股份有限公司 | Method for detecting compatibility of CI card interface and CA card |
| CN102945504A (en) * | 2012-11-19 | 2013-02-27 | 北京宏思电子技术有限责任公司 | Intelligent card and control method thereof |
| WO2014166419A1 (en) * | 2013-04-12 | 2014-10-16 | 中国银联股份有限公司 | Method and terminal device for continuous power supply to external carrier |
| US9880597B2 (en) | 2013-04-12 | 2018-01-30 | China Unionpay Co., Ltd. | Method and terminal device for continuous power supply to external carrier |
| WO2017177655A1 (en) * | 2016-04-15 | 2017-10-19 | 中兴通讯股份有限公司 | Electronic tag, and power supply management method and apparatus for electronic tag |
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