CN204440387U - Many level translators used by card - Google Patents
Many level translators used by card Download PDFInfo
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- CN204440387U CN204440387U CN201520148693.9U CN201520148693U CN204440387U CN 204440387 U CN204440387 U CN 204440387U CN 201520148693 U CN201520148693 U CN 201520148693U CN 204440387 U CN204440387 U CN 204440387U
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- power source
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Abstract
Many level translators used by card, belong to digital communication technology field, and the utility model is solve the raising that the level translator be built in product not only result in finished product, and utilization rate is not high, and applicability is also bad, causes the problem of a kind of waste of resource.The utility model comprises DC-DC power source integration module, level switch module and logic control element; DC-DC power source integration module: 3V or the 5V level value that receiving system controller exports, converts 3V or the 5V level value of input to 1.8V, 1.9V, 3V, 3.3V or 5V level value, and exports to subscriber equipment; Level switch module: for subscriber equipment provides level shifted signal, reset signal, clock signal, information exchanging channel and esd protection; Logic control element: manually setting changes the mode of operation of DC-DC power source integration module, thus makes DC-DC power source integration module export different level values.
Description
Technical field
The utility model relates to the adjustment of many level shifter interfaces voltage, belongs to digital communication technology field.
Background technology
Along with the development of electronic technology, in design of electronic circuits of new generation, along with the introducing of low logic voltage, usually there is the inharmonic problem of I/O logic in internal system, thus improves the complicacy of system.Increasing digital IC adopts and in the past incompatible supply voltage, particularly the widespread use of the interface circuit such as SIM/ smart card, SPI/QSPI/Micro Wire further increases the diversity of logic level coupling, coupling not only between docking port voltage claims, also require can to carry out between interface to reset, sheet choosing, the information such as clock and data safe and effective exchange, in order to solve level match problem, product circuit design all remains the function of level translator therein, with the requirement of satisfied communication.
Adopt this traditional circuit design, general needs all arrange corresponding level shifting circuit in each product, this not only causes the rising of cost of products, and have himself limitation due to the level shifting circuit arranged, can only meet the communication with a certain peripheral hardware, the level translator be therefore built in product not only result in the raising of finished product, and utilization rate is not high, applicability is also bad, causes the one of resource to waste.
Summary of the invention
The utility model object is the raising that not only result in finished product in order to solve the level translator be built in product, and utilization rate is not high, and applicability is also bad, causes the problem of a kind of waste of resource, provides a kind of card and uses many level translators.
The many level translators of card described in the utility model, it comprises DC-DC power source integration module, level switch module and logic control element;
DC-DC power source integration module: 3V or the 5V level value that receiving system controller exports, converts 3V or the 5V level value of input to 1.8V, 1.9V, 3V, 3.3V or 5V level value, and exports to subscriber equipment;
Level switch module: for subscriber equipment provides level shifted signal, reset signal, clock signal, information exchanging channel and esd protection;
Logic control element: manually setting changes the mode of operation of DC-DC power source integration module, thus makes DC-DC power source integration module export different level values.
Advantage of the present utility model: the purpose of this utility model is to provide a kind of with low cost, effectively can change the level between system controller and subscriber equipment; The signals such as corresponding reset, sheet choosing, clock can be provided simultaneously, and effective exchange of relevant information can be carried out, thus make complete set work efficiently and safely between controller and equipment.
Not only provide level shifted signal, reset signal, clock signal by level switch module and carry out the passage of message exchange with peripheral hardware, also there is esd protection effect; By the control of Logic control module to the integrated modular converter of DC-DC power source, this module is made to export different level values, to obtaining the value required for scene, complete the coupling of interface level, simultaneously the integrated mould of DC-DC power source fast in different chips can meet different supply voltages again, and then complete the mixing conversion of the low-Gao of level, height-low, widened the use occasion of this utility model, and expense and safeguard lower, there is good market application foreground.
Accompanying drawing explanation
Fig. 1 is the theory diagram of card described in the utility model with many level translators;
Fig. 2 is the physical circuit figure of the many level translators of card described in the utility model;
Fig. 3 is DC-DC power source integration module physical circuit figure;
Fig. 4 is logic control element physical circuit figure.
Embodiment
Embodiment one: present embodiment is described below in conjunction with Fig. 1 and Fig. 2, blocks described in present embodiment and uses many level translators, and it comprises DC-DC power source integration module 1, level switch module 2 and logic control element 3; Dotted portion as shown in Figure 1.System controller provides 3V or 5V level value, and subscriber equipment comprises smart card and other interface.
DC-DC power source integration module 1: 3V or the 5V level value that receiving system controller exports, converts 3V or the 5V level value of input to 1.8V, 1.9V, 3V, 3.3V or 5V level value, and exports to subscriber equipment;
Level switch module 2: for subscriber equipment provides level shifted signal, reset signal, clock signal, information exchanging channel and esd protection;
Logic control element 3: manually setting changes the mode of operation of DC-DC power source integration module 1, thus makes DC-DC power source integration module 1 export different level values.
Block described in present embodiment and realize the height of level-low, the mixing conversion (as working between the processor of 1.8V and work 3.3V peripheral hardware) of low-Gao with many level translators.
Embodiment two: present embodiment is described below in conjunction with Fig. 3, present embodiment is further qualified embodiment one, and DC-DC power source integration module 1 is made up of MAX1730 chip, MAX1686 chip and MAX8860 chip.As shown in Figure 3.
MAX1730 chip is the integrated circuit (IC)-components of Maxim company of the U.S., and its inner structure, as shown in the figure shown in 5, also claims voltage-dropping type charge pump DC-DC transducer.Its effect is when shutdown mode input end " SHDN " input signal is effective, can input different high and low level signals, the 3V level signal of input is converted to the level signal of 1.8V or 1.9V according to input " FB " input end.
MAX1686 chip is the DC-DC converter integrated circuit (IC) chip of Maxim company of the U.S..Its effect is when shutdown mode input end " SHDN " input signal is effective, can according to input
input end inputs different high and low level signals, the 3V level signal of input is converted to the level signal of 3V or 5V.
MAX8860 chip is the DC-DC converter integrated circuit (IC) chip of Maxim company of the U.S., is the linear voltage regulator that 8 pin uMAX encapsulate." SET " pin is used for output voltage and arranges: when contact resistance dividing potential drop, its output voltage is adjustable; When its ground connection, output voltage is arranged by internal circuit, has 2.77V, 2.82V, 3.3V tri-kinds; " FAULT " pin is inefficacy output terminal, when chip can not voltage stabilizing time, this end step-down, can for detect.Its effect is when shutdown mode input end " SHDN " input signal is effective, according to SET " connection of pin difference, when inputting 5V level signal, different level values can be exported.This novel example is to export 3.3V.
Embodiment three: present embodiment is further qualified embodiment one, and level switch module 2 adopts MAX1840 chip to realize.Be the integrated circuit (IC)-components of Maxim company of the U.S., level conversion and esd protection can be provided for Subscriber Identity Module and smart card.Its inside is integrated with two unidirectional level translators, and for clock (Clock) and the signal of (Reset) of resetting, a two-way level converting device is used for serial data stream.Output current meets the needs of general card and multiple serial interface circuit completely, and without the need to external impressed current amplification driving circuit, structure is simple, with low cost.This chip completes provides the signals such as RSI, CLK, I/O to interfaces such as SIM/ smart card, SPI/QSPI/Micro Wire, has esd protection effect simultaneously.
Embodiment four: present embodiment is described below in conjunction with Fig. 4, present embodiment is further qualified embodiment one, and logic control element 3 adopts some hand switches and logic gate to realize.As shown in Figure 4.For different actual conditions and actual demand, directly can operate, practical succinct, convenient, with low cost.Logic control element 3 is by three hand switches K1, K2, K3 in the present embodiment; Three logic gate D1, D2, D3; Resistance R1, R2, R3, R4; Electric capacity C1, C2 are formed, and the voltage of input is 3V or 5V.Output valve is controlled specific as follows: 1.8V, 1.9V, 3V, 3.3V or 5V etc. through DC-DC power source integration module 1.
Embodiment five: below in conjunction with the accompanying drawing in the utility model embodiment, technical scheme in the utility model embodiment is clearly and completely described, obviously described embodiment is only the utility model part embodiment, instead of whole embodiment.Based on the embodiment of utility model, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to protection domain of the present utility model.
(1) input 3V, export 1.8V or 1.9V
When field control power supply is 3V, K switch 3 is closed, makes MAX1686's and MAX1730
the incoming level of end is low level, thus makes two chips enter data-transmission mode; Now can pass through the closed of gauge tap K1, control the specific works situation of two chips, when K switch 1 is in off-state, when " IN " pin of MAX1730 is input as high level 1, enter to effective duty (now because " IN " pin of MAX1686 is low level, now this chip is in disarmed state); If desired the output voltage of 1.8V, then only need make the output of system controller be low level, then " FB " end of MAX1730 is given low level, and now MAX1730 chip exports 1.8V voltage; If desired the output voltage of 1.9V, then only need make the output of system controller be high level, then " FB " end of MAX1730 is given high level, and now MAX1730 chip exports 1.9V voltage.
(2) input 3V, export 3V or 5V
K switch 3 is closed, makes MAX1686's and MAX1730
the incoming level of end is low level, thus makes two chips enter data-transmission mode; " IN " pin of Closing Switch K1, chip MAX1686 is input as high level 1, enters into effective duty (now because " IN " pin of MAX1730 is low level, now this chip is in disarmed state); When the output of system controller is high level, " 3/5 " pin of MAX1686 is input as high level, then chip exports 3V, and when the output of system controller is low level, " 3/5 " pin of MAX1686 inputs low high level, then chip exports 5V.
(3) input 5V, export 3.3V
When field control power supply is 5V, K switch 2 closed, " IN " pin of MAX8860 chip is high level, simultaneously
end is low imput, and chip is started working, and exports 3.3V voltage.
Thus achieve two kinds of level signal inputs, the effect that plurality of level signal exports, thus reach the effect of many level conversion, simultaneously due to MAX1840 jointly with the use of, thus it is enough large to meet output current, without the need to external impressed current amplifying circuit again, the scale of the circuit reduced, reduce the cost of circuit, therefore MAX1840 chip also simultaneously for subordinate provides RSI, CLK, I/O signal, can be particularly useful for the Interface realization level conversion such as various SIM/ smart card, SPI/QSPI/Micro Wire in addition.
Adopt the technical scheme that this embodiment provides, by the connection of many level translators, make system controller and between SIM/ smart card and SPI/QSPI/Micro Wire etc., complete the effective exchanges data of energy; And because the operation technique of chip is very ripe, so make the many level shifter interfaces utensil that the utility model proposes have good operation stability and anti-interference, reduce use cost simultaneously, there are good market outlook.
The above; be only the utility model preferably embodiment; but protection domain of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the change that can expect easily or replacement, all should be encompassed within protection domain of the present utility model.
Claims (4)
1. many level translators used by card, and it is characterized in that, it comprises DC-DC power source integration module (1), level switch module (2) and logic control element (3);
DC-DC power source integration module (1): 3V or the 5V level value that receiving system controller exports, converts 3V or the 5V level value of input to 1.8V, 1.9V, 3V, 3.3V or 5V level value, and exports to subscriber equipment;
Level switch module (2): for subscriber equipment provides level shifted signal, reset signal, clock signal, information exchanging channel and esd protection;
Logic control element (3): manually setting changes the mode of operation of DC-DC power source integration module (1), thus makes DC-DC power source integration module (1) export different level values.
2. block according to claim 1 and use many level translators, it is characterized in that, DC-DC power source integration module (1) is made up of MAX1730 chip, MAX1686 chip and MAX8860 chip.
3. block according to claim 1 and use many level translators, it is characterized in that, level switch module (2) adopts MAX1840 chip to realize.
4. block according to claim 1 and use many level translators, it is characterized in that, logic control element (3) adopts some hand switches and logic gate to realize.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520148693.9U CN204440387U (en) | 2015-03-16 | 2015-03-16 | Many level translators used by card |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520148693.9U CN204440387U (en) | 2015-03-16 | 2015-03-16 | Many level translators used by card |
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| Publication Number | Publication Date |
|---|---|
| CN204440387U true CN204440387U (en) | 2015-07-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520148693.9U Expired - Fee Related CN204440387U (en) | 2015-03-16 | 2015-03-16 | Many level translators used by card |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109324992A (en) * | 2018-10-24 | 2019-02-12 | 深圳市鸿陆技术有限公司 | A kind of terminal intelligent card interface expansion system and its control method |
| CN110989472A (en) * | 2019-12-30 | 2020-04-10 | 威创集团股份有限公司 | Equipment and method for being compatible with different level standards |
-
2015
- 2015-03-16 CN CN201520148693.9U patent/CN204440387U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109324992A (en) * | 2018-10-24 | 2019-02-12 | 深圳市鸿陆技术有限公司 | A kind of terminal intelligent card interface expansion system and its control method |
| CN110989472A (en) * | 2019-12-30 | 2020-04-10 | 威创集团股份有限公司 | Equipment and method for being compatible with different level standards |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150701 Termination date: 20210316 |
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| CF01 | Termination of patent right due to non-payment of annual fee |