CN104062946A - Interface expansion circuit and electronic device - Google Patents
Interface expansion circuit and electronic device Download PDFInfo
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- CN104062946A CN104062946A CN201310091700.1A CN201310091700A CN104062946A CN 104062946 A CN104062946 A CN 104062946A CN 201310091700 A CN201310091700 A CN 201310091700A CN 104062946 A CN104062946 A CN 104062946A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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Abstract
Disclosed is an interface expansion circuit. The interface expansion circuit comprises multiple expansion interfaces, an output interface, a diverter switch and a signal switcher. The multiple expansion interfaces are respectively in insertion connection with multiple external devices and are respectively used for receiving multiple first signals input by the multiple external devices. The output interface is used for insertion connection with an electronic device. The signal switcher is connected with the multiple expansion interfaces. The signal switch comprises a second control end and an output end. The diverter switch is connected with the second control end, the output end and the output interface. The diverter switch is used for receiving third level signals generated by the electronic device through the output interface and conducting electrical connection between the second control end and the output interface in response to the third level signals. The signal switcher is enabled to receive selection instructions input by the electronic device through the second control end, the conducted diverter switch and the output interface and select one expansion interface from the multiple expansion interfaces to be electrically connected with the output end according to the selection instructions. The invention also provides an electronic device.
Description
Technical field
The present invention relates to a kind of Interface Expanding circuit and electronic equipment.
Background technology
Interface Expanding circuit has been widely used in electronic equipment, so that an Interface Expanding of electronic equipment is become to a plurality of interfaces.Conventionally Interface Expanding circuit comprises a plurality of input interfaces, output interface, operating unit and voltage conversion unit, a plurality of input interfaces are connected respectively and are respectively used to receive the signal of a plurality of external unit inputs with a plurality of external units, output interface is connected with the interface of electronic equipment.Voltage conversion unit is used for receiving external voltage and converts described external voltage to supply voltage, and this supply voltage is given whole Interface Expanding circuit supply.Operating unit is used for responding user and operates generation selection instruction, Interface Expanding circuit selects input interface and output interface in a plurality of input interfaces to be electrically connected according to selection instruction, and the signal of inputting with the external unit that the input interface with selecting is connected exports electronic equipment to by output interface.
Then, above-mentioned Interface Expanding circuit need to additionally arrange response user and operate operating unit and the voltage conversion unit that produces selection instruction, has increased design complexities, and has increased board design size.
Summary of the invention
Given this, be necessary the Interface Expanding circuit that provides a kind of design complexities lower.
The electronic equipment that provides a kind of and above-mentioned Interface Expanding circuit to be used in conjunction with is also provided.
An Interface Expanding circuit, it comprises a plurality of expansion interfaces, output interface, change-over switch and signal shifter.A plurality of expansion interfaces are pegged graft with a plurality of external units respectively and are respectively used to receive a plurality of first signals from a plurality of external unit inputs, and output interface is used for and electronic device docking.Signal shifter is connected with a plurality of expansion interfaces, and signal shifter comprises the second control end and output terminal, and this change-over switch is connected with the second control end, output terminal and output interface.Change-over switch is used for receiving by output interface the three level signal that electronic equipment produces, and responds the electric connection between three level signal conducting the second control end and output interface; Make signal shifter pass through the selection instruction that the change-over switch of the second control end, conducting and output interface receive electronic equipment input, and select the expansion interface and output terminal electric connection in a plurality of expansion interfaces according to selection instruction.The 4th level signal that change-over switch also produces for receive electronic equipment by output interface, and respond the electric connection between the 4th level signal conducting output terminal and output interface; The first signal that the external unit that signal shifter is pegged graft the expansion interface with described selection by change-over switch and the output interface of output terminal, conducting is inputted exports electronic equipment to.
An electronic equipment, it comprises processing unit, signaling interface, gauge tap and selector switch.This signaling interface is for pegging graft with Interface Expanding circuit, and this Interface Expanding circuit and a plurality of external unit are pegged graft.Processing unit comprises the first control end and input end, this selector switch is connected with the first control end, input end and signaling interface, this processing unit is used for producing the first level signal and second electrical level signal when signaling interface and the grafting of Interface Expanding circuit, and this processing unit is also for generation of selection instruction; This gauge tap is connected with signaling interface, this gauge tap is for the electric connection between conducting processing unit when the grafting of signaling interface and Interface Expanding circuit and selector switch, make selector switch by the first level signal of the gauge tap reception & disposal unit generation of conducting, and respond the electric connection between first level signal conducting the first control end and signaling interface, make processing unit export selection instruction to Interface Expanding circuit by selector switch and the signaling interface of the first control end, conducting; This selection instruction is selected external unit and signaling interface electric connection of a plurality of external units for control interface expanded circuit.The selector switch second electrical level signal that also the gauge tap reception & disposal unit by conducting produces, and responding the electric connection between second electrical level signal conduction input end and signaling interface, the selector switch and the signaling interface that make processing unit pass through input end, conducting receive the first signal from the external unit input of above-mentioned selection.
Above-mentioned Interface Expanding circuit receives selection instruction from electronic equipment when its output interface and electronic device docking, to select expansion interface and output interface in a plurality of expansion interfaces to be electrically connected according to selection instruction.With respect to prior art, because Interface Expanding circuit does not need additionally to arrange response user, do not operate operating unit and the infrared remote receiver that produces selection instruction, so complex circuit designs degree is lower.
Accompanying drawing explanation
Fig. 1 is the Interface Expanding circuit of a better embodiment and the functional block diagram of electronic equipment.
Fig. 2 is the circuit diagram of one of Interface Expanding circuit shown in Fig. 1 and electronic equipment better embodiment.
Main element symbol description
| Interface Expanding circuit | 200 |
| Expansion interface | 20、20A |
| Signal shifter | 22 |
| The second control end | 220 |
| Output terminal | 222 |
| Change-over switch | 24 |
| Output interface | 26 |
| Electronic equipment | 100 |
| Signaling interface | 10 |
| Operating unit | 11 |
| Power supply unit | 12 |
| Voltage conversion unit | 14 |
| Enable Pin | 140 |
| Processing unit | 15 |
| The first control end | 150 |
| Input end | 152 |
| Selector switch | 16 |
| Gauge tap | 18 |
| Reverser | 19 |
| External unit | 300 |
| The first triode | Q1 |
| MOS field effect transistor | Q2 |
| The first resistance | R1 |
| The second resistance | R2 |
Following embodiment further illustrates the present invention in connection with above-mentioned accompanying drawing.
Embodiment
Refer to Fig. 1, the electronic equipment 100 of a better embodiment comprises signaling interface 10, processing unit 15, gauge tap 18, selector switch 16 and reverser 19.Signaling interface 10 is pegged graft with Interface Expanding circuit 200, and Interface Expanding circuit 200 is pegged graft with a plurality of external units 300.In the present embodiment, electronic equipment 100 is televisor or other electronic equipment, and signaling interface 10 is HDMI interface.
Processing unit 15 comprises the first control end 150 and input end 152.Processing unit 15 for producing the first level signal and second electrical level signal when signaling interface 10 is pegged graft with Interface Expanding circuit 200, processing unit 15 is also for generation of selection instruction, and this selection instruction can be that processing unit 15 acquiescences produce or processing unit 15 response users operate generation.
Selector switch 16 is connected with the first control end 150, input end 152 and signaling interface 10.
Gauge tap 18 is connected with signaling interface 10.Gauge tap 18 is for the electric connection between conducting processing unit 15 and selector switch 16 when signaling interface 10 and Interface Expanding circuit 200 pegged graft.Selector switch 16 is by the first level signal of gauge tap 18 reception & disposal unit 15 generations of conducting, and respond the electric connection between first level signal conducting the first control end 150 and signaling interface 10, make processing unit 15 export selection instruction to Interface Expanding circuit 200 by selector switch 16 and the signaling interface 10 of the first control end 150, conducting.This selection instruction is selected external unit and signaling interface 10 electric connections of a plurality of external units 300 for control interface expanded circuit 200.
The selector switch 16 second electrical level signal that also the 18 reception & disposal unit 15 of the gauge tap by conducting produce, and respond the electric connection between second electrical level signal conduction input end 152 and signaling interface 10, make processing unit 15 receive the first signal from external unit 300 inputs of above-mentioned selection by selector switch 16 and the signaling interface 10 of input end 152, conducting.In the present embodiment, first signal is HDMI signal, thereby 15 pairs of described first signals of processing unit can offer display unit (not shown) after processing, shows HDMI high definition picture.
Reverser 19 is connected between processing unit 15 and signaling interface 10, and reverser 19 oppositely becomes three level signal for the first level signal that processing unit 15 is produced; Reverser 19 becomes the 4th level signal for the second electrical level signals reverse that processing unit 15 is produced.
Interface Expanding circuit 200 comprises a plurality of expansion interfaces 20, signal shifter 22, change-over switch 24 and output interface 26.A plurality of expansion interfaces 20 are pegged graft and are respectively used to receive a plurality of first signals from a plurality of external unit 300 inputs with a plurality of external units 300 respectively.Output interface 26 is pegged graft for the signaling interface 10 with electronic equipment 100.In the present embodiment, a plurality of expansion interfaces 20 are HDMI interface, and output interface 26 is also HDMI interface; A plurality of first signals are HDMI signal; The quantity of a plurality of expansion interfaces 20 is four, the quantity of a plurality of external units 300 be also four and take respectively the exploitation of DVD drive, Microsoft game host XBOX360, the PS3 game machine of Sony Corporation's exploitation and Play Box game machine describe as example.
Signal shifter 22 comprises the second control end 220 and output terminal 222, and change-over switch 24 is connected with the second control end 220, output terminal 222 and output interface 26.The three level signal of change-over switch 24 for producing by output interface 26 and signaling interface 10 reception reversers 19, and respond the electric connection between three level signal conducting the second control end 220 and output interface 26; Make signal shifter 22 receive the selection instruction of electronic equipments 100 inputs by change-over switch 24 and the output interface 26 of the second control end 220, conducting, and respond selection instruction and select the expansion interface and output terminal 222 electric connections in a plurality of expansion interfaces 20.
Four level signal of change-over switch 24 for producing by output interface 26 and signaling interface 10 reception reversers 19, and respond the electric connection between the 4th level signal conducting output terminal 222 and output interface 26; The first signal that the external unit 300 that signal shifter 22 is pegged graft the expansion interface with above-mentioned selection 20 by change-over switch 24 and the output interface 26 of output terminal 222, conducting is inputted exports the signaling interface 10 of electronic equipment 100 to.
In the present embodiment, the first level signal that processing unit 15 produces is high level signal, and reverser 19 oppositely becomes three level signal by the first level signal, and this three level signal is low level signal.The effect of the first level signal that processing unit 15 produces is the electric connection of controlling between selector switch 16 conducting the first control ends 150 and signaling interface 10, makes processing unit 15 selection instruction be exported to the output interface 26 of Interface Expanding circuit 200 by selector switch 16 and the signaling interface 10 of the first control end 150, conducting.The three level signal that reverser 19 produces is by control signal interface 10 and output interface 26, to export the change-over switch 24 of Interface Expanding circuit 200 to, and this three level signal is for controlling the electric connection between change-over switch 24 conducting the second control ends 220 and output interface 26; Make signal shifter 22 receive above-mentioned selection instruction by change-over switch 24 and the output interface 26 of the second control end 220, conducting, and respond selection instruction and select the expansion interface and output terminal 222 electric connections in a plurality of expansion interfaces 20.In order to transmit above-mentioned selection instruction, the first level signal is controlled the electric connection between selector switch 16 conducting the first control ends 150 and signaling interface 10, and three level signal is controlled the electric connection between change-over switch 24 conducting the second control ends 220 and output interface 26; The effect of reverser 19 be for make selector switch 16 and change-over switch 24 under contrary level signal is controlled respectively in conducting state, with respect to adopting identical level signal, control accuracy is higher and can facilitate the control sequential chart of user's identification selection switch 16 and change-over switch 24.
In the present embodiment, the second electrical level signal that processing unit 15 produces is low level signal, and reverser 19 becomes the 4th level signal by second electrical level signals reverse, and the 4th level signal is high level signal.
In the first situation (power supply that specifically finger port expansion circuit 200 receives electronic equipment 100 when its output interface 26 is pegged graft with electronic equipment 100 is to carry out initialization), above-mentioned selection instruction comprises the acquiescence selection instruction that processing unit 15 acquiescences produce, and a plurality of expansion interfaces 20 comprise acquiescence expansion interface 20A.
Processing unit 15 is in the first predetermined amount of time starting in the moment of pegging graft from signaling interface 10 and output interface 26 and produce the first level signal in the second predetermined amount of time of the first predetermined amount of time, and produces second electrical level signal after above-mentioned the second predetermined amount of time.In the present embodiment, the first predetermined amount of time refers to that when signaling interface 10 is pegged graft with output interface 26, the power supply that Interface Expanding circuit 200 receives electronic equipment 100 is to complete the needed time of initialization; Particularly, signal shifter 22 is integrated chip, and the first predetermined amount of time refers to that signal shifter 22 receives power supply to complete the needed time of initialization.
At signaling interface 10 and output interface 26, peg graft moment, processing unit 15 starts to produce the first level signal.Concrete detecting mode is, processing unit 15 comprises a detecting pin P14, when signaling interface 10 is pegged graft with output interface 26, the detecting pin P14 of processing unit 15 is electrically connected by the detecting pin P14 of signaling interface 10 and the detecting pin P14 of output interface 26, detecting pin P14 ground connection due to output interface 26, therefore the detecting pin P14 of processing unit 15 is low level state, thereby triggering processing unit 15 produces the first level signal and produce second electrical level signal after above-mentioned the second predetermined amount of time in the first predetermined amount of time and in the second predetermined amount of time.
Gauge tap 18 is electrically connected with the detecting pin P14 of signaling interface 10, when signaling interface 10 is pegged graft with output interface 26, the detecting pin P14 of signaling interface 10 is low level state, makes gauge tap 18 receive low level signal and responds the electric connection between low level signal conducting processing unit 15 and selector switch 16.Therefore, in above-mentioned the first predetermined amount of time and in the second predetermined amount of time, selector switch 16 is received above-mentioned the first level signal and responds the electric connection between first level signal conducting the first control end 150 and signaling interface 10 from processing unit 15 by the gauge tap 18 of conducting.Due in above-mentioned the second predetermined amount of time, selector switch 16 is the electric connection between conducting the first control end 150 and signaling interface 10, therefore, processing unit 15 can transfer to output interface 26 by selector switch 16 and the signaling interface 10 by the first control end 150, conducting by the acquiescence selection instruction producing in the second predetermined amount of time.
Due in above-mentioned the second predetermined amount of time, reverser 19 oppositely becomes the first level signal from processing unit 15 inputs three level signal and by signaling interface 10 and output interface 26, exports three level signal to change-over switch 24, thus the electric connection between change-over switch 24 response three level signal conducting output interfaces 26 and the second control end 220 of signal shifter 22.Due in the second predetermined amount of time, change-over switch 24 the second control end 220 of Continuity signal switch 22 and the electric connection between output interface 26; Therefore in the second predetermined amount of time, signal shifter 22 receives by change-over switch 24 and the change-over switch 24 of the second control end 220, conducting the acquiescence selection instruction of inputting from electronic equipment 100, and response acquiescence selection instruction is selected acquiescence expansion interface 20A and output terminal 222 electric connections.
After the second predetermined amount of time, reverser 19 is for the second electrical level signals reverse from processing unit 15 inputs is become to the 4th level signal and exports the 4th level signal to change-over switch 24 by signaling interface 10 and output interface 26, thus the electric connection between change-over switch 24 response the 4th level signal conducting output interfaces 26 and the output terminal 222 of signal shifter 22.Due to after the second predetermined amount of time, change-over switch 24 output terminal 222 of Continuity signal switch 22 and the electric connection between output interface 26, therefore after the second predetermined amount of time, the first signal that the output terminal 222 of signal shifter 22 is inputted the external unit with above-mentioned acquiescence expansion interface 20A grafting 300 exports signaling interface 10 to by change-over switch 24 and the output interface 26 of conducting.
After the second predetermined amount of time, selector switch 16 receives from the second electrical level signal of processing unit 15 inputs and responds the electric connection between second electrical level signal conduction signaling interface 10 and input end 152.Therefore after the second predetermined amount of time, processing unit 15 can pass through the selector switch 16 of input end 152, conducting and the first signal that signaling interface 10 receives external unit 300 inputs of pegging graft with above-mentioned acquiescence expansion interface 20A, and above-mentioned first signal (HDMI signal) is carried out delivering to display screen (not shown) demonstration HDMI high definition picture after decoding.
In the second situation, electronic equipment 100 also comprises operating unit 11, and operating unit 11 operates generation user selection instruction for responding user, and in the present embodiment, operating unit 11 is for being arranged at the button (not shown) on electronic equipment 100.In other embodiments, operating unit 11 is for being arranged at the infrared remote receiver (not shown) on electronic equipment 100, and this infrared remote receiver operates above-mentioned user's selection instruction of generation for receiving telepilot (not shown) response user.Above-mentioned selection instruction comprises that operating unit 11 response users operate user's selection instruction of generation.Now processing unit 15 is also for operating and produce in the first Preset Time section that user's selection instruction moment starts and produce above-mentioned the first level signal in the second Preset Time section of the first Preset Time section after above-mentioned the first predetermined amount of time and from operating unit 11 response users, and produces above-mentioned second electrical level signal after above-mentioned the second Preset Time section.
In above-mentioned the first Preset Time section and in the second Preset Time section, selector switch 16 is received above-mentioned the first level signal and responds the electric connection between first level signal conducting the first control end 150 and signaling interface 10 from processing unit 15 by the gauge tap 18 of conducting.Due in above-mentioned the second Preset Time section, selector switch 16 is the electric connection between conducting the first control end 150 and signaling interface 10, therefore, processing unit 15 can be by the second Preset Time section, by above-mentioned user's selection instruction, selector switch 16 and the signaling interface 10 by the first control end 150, conducting transfers to output interface 26.
Due in above-mentioned the second Preset Time section, reverser 19 oppositely becomes the first level signal from processing unit 15 inputs three level signal and by signaling interface 10 and output interface 26, exports three level signal to change-over switch 24, thus the electric connection between change-over switch 24 response three level signal conducting output interfaces 26 and the second control end 220 of signal shifter 22.Due in the second Preset Time section, change-over switch 24 the second control end 220 of Continuity signal switch 22 and the electric connection between output interface 26; Therefore in the second Preset Time section, user's selection instruction that signal shifter 22 change-over switch 24 and the change-over switch 24 by the second control end 220, conducting receives from electronic equipment 100 inputs, and respond user's selection instruction and select the expansion interface and output terminal 222 electric connections in a plurality of expansion interfaces 20.
After the second Preset Time section, reverser 19 is for the second electrical level signals reverse from processing unit 15 inputs is become to the 4th level signal and exports the 4th level signal to change-over switch 24 by signaling interface 10 and output interface 26, thus the electric connection between change-over switch 24 response the 4th level signal conducting output interfaces 26 and the output terminal 222 of signal shifter 22.Due to after the second Preset Time section, change-over switch 24 output terminal 222 of Continuity signal switch 22 and the electric connection between output interface 26, therefore after the second Preset Time section, the output terminal 222 of signal shifter 22 by with above-mentioned a plurality of expansion interfaces 20 in change-over switch 24 and output interface 26 by conducting of the first signal of expansion interface external unit 300 inputs of pegging graft export signaling interface 10 to.
After the second Preset Time section, selector switch 16 receives from the second electrical level signal of processing unit 15 inputs and responds the electric connection between second electrical level signal conduction signaling interface 10 and input end 152.Therefore after the second Preset Time section, processing unit 15 can pass through the selector switch 16 of input end 152, conducting and the first signal of external unit 300 inputs that an expansion interface in signaling interface 10 receptions and above-mentioned a plurality of expansion interfaces 20 is pegged graft, and above-mentioned first signal (HDMI signal) is carried out delivering to display screen (not shown) demonstration HDMI high definition picture after decoding.
In addition, electronic equipment 100 also comprises power supply unit 12 and voltage conversion unit 14.Power supply unit 12 is for giving operating unit 11 and processing unit 15 power supplies.Voltage conversion unit 14 for example, converts supply voltage Vcc to for the voltage (3.3V) when signaling interface 10 is pegged graft with the output interface 26 of Interface Expanding circuit 200, power supply unit 12 being provided.Please refer to Fig. 2, voltage conversion unit 14 comprises Enable Pin 140.The Enable Pin 140 of voltage conversion unit 14 is electrically connected with the detecting pin P14 of signaling interface 10, when signaling interface 10 is pegged graft with output interface 26, the detecting pin P14 of the detecting pin P14 of signaling interface 10 and output interface 26 is electrically connected, detecting pin P14 ground connection due to output interface 26, therefore the Enable Pin 140 of voltage conversion unit 14 is low level state, thereby the voltage transitions that trigger voltage converting unit 14 provides power supply unit 12 becomes supply voltage Vcc.
Above-mentioned supply voltage Vcc is to signaling interface 10, gauge tap 18 and selector switch 16 power supplies.When signaling interface 10 is not pegged graft with output interface 26, voltage conversion unit 14 stops producing supply voltage.
Please again consult Fig. 2, gauge tap 18 comprises the first triode Q1, MOS field effect transistor Q2, the first resistance R 1 and the second resistance R 2, the base stage of the first triode Q1 connects signaling interface 10 by the second resistance R 2, the grounded collector of the first triode Q1, the emitter of the first triode Q1 receives described supply voltage by the first resistance R 1; The grid of MOS field effect transistor Q2 connects the emitter of the first triode Q1, the first level signal or the second electrical level signal of source electrode reception & disposal unit 15 inputs of MOS field effect transistor Q2, and the drain electrode of MOS field effect transistor Q2 connects selector switch 16; When signaling interface 10 is pegged graft with output interface 26, the first triode Q1 and MOS field effect transistor Q2 conducting, make above-mentioned the first level signal or second electrical level signal be transferred into selector switch 16.
Above-mentioned Interface Expanding circuit 200 receives selection instruction from electronic equipment 100 when its output interface 26 is pegged graft with electronic equipment 100, to select the expansion interface 20 in a plurality of expansion interfaces 20 to be electrically connected with output interface 26 according to selection instruction.And above-mentioned Interface Expanding circuit 200 is powered by electronic equipment 100 when its output interface 26 is pegged graft with electronic equipment 100, with respect to prior art, because not needing additionally to arrange voltage conversion unit and respond user, Interface Expanding circuit 200 do not operate the operating unit that produces selection instruction, therefore complex circuit designs degree is lower, and has reduced board design size.
Those skilled in the art will be appreciated that; above embodiment is only for the present invention is described; and be not used as limitation of the invention; as long as within connotation scope of the present invention, within the appropriate change that above embodiment is done and variation all drop on the scope of protection of present invention.
Claims (10)
1. an electronic equipment, it comprises processing unit and signaling interface, signaling interface for and Interface Expanding circuit peg graft, Interface Expanding circuit and the grafting of a plurality of external unit; Its improvement is: electronic equipment also comprises gauge tap and selector switch, processing unit comprises the first control end and input end, selector switch is connected with the first control end, input end and signaling interface, processing unit is used for producing the first level signal and second electrical level signal when signaling interface and the grafting of Interface Expanding circuit, and processing unit is also for generation of selection instruction;
Gauge tap is connected with signaling interface, gauge tap is for the electric connection between conducting processing unit when the grafting of signaling interface and Interface Expanding circuit and selector switch, make selector switch by the first level signal of the gauge tap reception & disposal unit generation of conducting, and respond the electric connection between first level signal conducting the first control end and signaling interface, make processing unit export selection instruction to Interface Expanding circuit by selector switch and the signaling interface of the first control end, conducting; Selection instruction is selected external unit and signaling interface electric connection of a plurality of external units for control interface expanded circuit;
The selector switch second electrical level signal that also the gauge tap reception & disposal unit by conducting produces, and responding the electric connection between second electrical level signal conduction input end and signaling interface, the selector switch and the signaling interface that make processing unit pass through input end, conducting receive the first signal from the external unit input of above-mentioned selection.
2. electronic equipment as claimed in claim 1, is characterized in that: this selection instruction comprises acquiescence selection instruction, and the plurality of external unit comprises acquiescence external unit;
This processing unit is for the first predetermined amount of time starting from signaling interface and Interface Expanding circuit grafting moment and produce the first level signal in the second predetermined amount of time after the first predetermined amount of time, in the second predetermined amount of time, produce this acquiescence selection instruction, and produce second electrical level signal after described the second predetermined amount of time; This processing unit selector switch and signaling interface by the first control end, conducting in the second predetermined amount of time exports acquiescence selection instruction to Interface Expanding circuit; This acquiescence selection instruction selects described acquiescence external unit and signaling interface to be electrically connected for control interface expanded circuit;
This processing unit also receives the first signal from described acquiescence external unit input for selector switch and the signaling interface by input end, conducting after the second predetermined amount of time.
3. electronic equipment as claimed in claim 2, it is characterized in that: this electronic equipment also comprises the operating unit being connected with processing unit, this selection instruction also comprises user's selection instruction that this operating unit response user operation produces, this processing unit also for operating and producing in user's selection instruction the first Preset Time section of moment and produce the first level signal in the second Preset Time section after the first Preset Time section after the first predetermined amount of time and from operating unit response user, in the second Preset Time section, pass through the first control end, the selector switch of conducting and signaling interface export user's selection instruction to Interface Expanding circuit, and produce second electrical level signal after the second Preset Time section, this user's selection instruction is selected external unit and signaling interface electric connection of a plurality of external units for control interface expanded circuit,
The first signal that this processing unit is also inputted for an external unit of selecting from a plurality of external units by selector switch and the signaling interface reception of input end, conducting after the second Preset Time section.
4. electronic equipment as claimed in claim 1, is characterized in that: this electronic equipment also comprises reverser,
This Interface Expanding circuit comprises a plurality of expansion interfaces, output interface, change-over switch and signal shifter, the plurality of expansion interface is pegged graft with a plurality of external units respectively and is respectively used to receive a plurality of first signals from a plurality of external unit inputs, and this output interface is for pegging graft with signaling interface; This signal shifter is connected with a plurality of expansion interfaces, and this signal shifter comprises the second control end and output terminal, and this change-over switch is connected with the second control end, output terminal and output interface;
This reverser is connected between processing unit and signaling interface; This reverser oppositely becomes three level signal for the first level signal that processing unit is produced, this change-over switch is used for receiving described three level signal by output interface and signaling interface, and responds the electric connection between three level signal conducting the second control end and output interface; Make signal shifter pass through the selection instruction that the change-over switch of the second control end, conducting and output interface receive electronic equipment input, and select the expansion interface and output terminal electric connection in a plurality of expansion interfaces according to selection instruction;
This reverser also becomes the 4th level signal for the second electrical level signals reverse that processing unit is produced, this change-over switch is used for receiving described the 4th level signal by output interface and signaling interface, and responds the electric connection between the 4th level signal conducting output terminal and output interface; The first signal that the external unit that signal shifter is pegged graft the expansion interface with described selection by change-over switch and the output interface of output terminal, conducting is inputted exports electronic equipment to.
5. electronic equipment as claimed in claim 3, is characterized in that: this electronic equipment also comprises power supply unit and voltage conversion unit, and power supply unit is for to operating unit and processing unit power supply; Voltage conversion unit comprises Enable Pin, the detecting pin of the Enable Pin of voltage conversion unit and signaling interface is electrically connected, when signaling interface and output interface grafting, the detecting pin of signaling interface and the detecting pin of output interface are electrically connected, the detecting pin ground connection of this output interface, the Enable Pin of voltage conversion unit receives low level signal, and voltage conversion unit becomes supply voltage for voltage transitions power supply unit being provided according to low level signal; Above-mentioned supply voltage is to signaling interface, gauge tap and selector switch power supply; When signaling interface is not pegged graft with output interface, voltage conversion unit stops producing supply voltage.
6. electronic equipment as claimed in claim 1, it is characterized in that: this gauge tap comprises the first triode, MOS field effect transistor and the first resistance, the base stage of this first triode connects signaling interface, the grounded collector of this first triode, the emitter of this first triode receives supply voltage by the first resistance; The grid of this MOS field effect transistor connects the emitter of the first triode, second electrical level signal or first level signal of the source electrode reception & disposal unit input of this MOS field effect transistor, and the drain electrode of this MOS field effect transistor connects selector switch; When signaling interface and output interface grafting, this first triode and the conducting of MOS field effect transistor, make described second electrical level signal or the first level signal be transferred into selector switch.
7. an Interface Expanding circuit, it comprises a plurality of expansion interfaces and output interface; A plurality of expansion interfaces are pegged graft with a plurality of external units respectively and are respectively used to receive a plurality of first signals from a plurality of external unit inputs, and output interface is used for and electronic device docking; Its improvement is: Interface Expanding circuit also comprises change-over switch and signal shifter, and signal shifter is connected with a plurality of expansion interfaces, and signal shifter comprises the second control end and output terminal, and change-over switch is connected with the second control end, output terminal and output interface;
Change-over switch is used for receiving by output interface the three level signal that electronic equipment produces, and responds the electric connection between three level signal conducting the second control end and output interface; Make signal shifter pass through the selection instruction that the change-over switch of the second control end, conducting and output interface receive electronic equipment input, and select the expansion interface and output terminal electric connection in a plurality of expansion interfaces according to selection instruction;
The 4th level signal that change-over switch also produces for receive electronic equipment by output interface, and respond the electric connection between the 4th level signal conducting output terminal and output interface; The first signal that the external unit that signal shifter is pegged graft the expansion interface with described selection by change-over switch and the output interface of output terminal, conducting is inputted exports electronic equipment to.
8. Interface Expanding circuit as claimed in claim 7, is characterized in that: this selection instruction comprises acquiescence selection instruction, and the plurality of expansion interface comprises acquiescence expansion interface;
This change-over switch is for receive the three level signal producing in second predetermined amount of time of electronic equipment in the first predetermined amount of time starting from output interface and electronic device docking moment and after the first predetermined amount of time by output interface, and responds the electric connection between three level signal conducting the second control end and output interface; This signal shifter also receives for change-over switch and the output interface by the second control end, conducting in this second predetermined amount of time the acquiescence selection instruction that electronic equipment is inputted, and response acquiescence selection instruction is selected acquiescence expansion interface and output terminal electric connection;
The 4th level signal that this change-over switch also produces after the second predetermined amount of time for receive electronic equipment by output interface, and respond the electric connection between the 4th level signal conducting output terminal and output interface; Make signal shifter export the first signal of the external unit input with the grafting of acquiescence expansion interface to electronic equipment by change-over switch and the output interface of output terminal, conducting.
9. Interface Expanding circuit as claimed in claim 8, is characterized in that: this selection instruction also comprises user's selection instruction that electronic equipment response user operation produces;
This change-over switch for by output interface, receives electronic equipment since the first predetermined amount of time after and from electronic equipment, respond that user operates in generation user selection instruction the first Preset Time section of moment and
The three level signal producing in the second Preset Time section after the first Preset Time section, and respond the electric connection between three level signal conducting the second control end and output interface; This signal shifter also receives this user's selection instruction for change-over switch and the output interface by the second control end, conducting in the second Preset Time section, and responds user's selection instruction and select expansion interface and output terminal in a plurality of expansion interfaces to be electrically connected;
The 4th level signal that this change-over switch also produces after the second Preset Time section for receive electronic equipment by output interface, and respond the electric connection between the 4th level signal conducting output terminal and output interface; Make signal shifter export the first signal of the external unit input of an expansion interface grafting with selecting to electronic equipment from a plurality of expansion interfaces by change-over switch and the output interface of output terminal, conducting.
10. the Interface Expanding circuit as described in claim 8 or 9, it is characterized in that: this first predetermined amount of time refers to that signal shifter receives electronic equipment power supply by output interface is to complete the needed time of initialization, whether this signal shifter also for detecting the change-over switch electric connection between conducting output terminal and output interface after the second predetermined amount of time or the second Preset Time section, and by output terminal, export the first signal of the external unit input of pegging graft with acquiescence expansion interface or an expansion interface selecting to change-over switch from a plurality of expansion interfaces during the electric connection between conducting output terminal and output interface detecting change-over switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310091700.1A CN104062946A (en) | 2013-03-21 | 2013-03-21 | Interface expansion circuit and electronic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310091700.1A CN104062946A (en) | 2013-03-21 | 2013-03-21 | Interface expansion circuit and electronic device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104062946A true CN104062946A (en) | 2014-09-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310091700.1A Pending CN104062946A (en) | 2013-03-21 | 2013-03-21 | Interface expansion circuit and electronic device |
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| Country | Link |
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| CN (1) | CN104062946A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107323918A (en) * | 2017-07-27 | 2017-11-07 | 深圳市和网零售有限公司 | Based on modular expansible Intelligent refuse classification apparatus and method |
| CN112952933A (en) * | 2021-02-03 | 2021-06-11 | 广州视源电子科技股份有限公司 | Interface expansion device, electronic device and interface expansion method |
-
2013
- 2013-03-21 CN CN201310091700.1A patent/CN104062946A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107323918A (en) * | 2017-07-27 | 2017-11-07 | 深圳市和网零售有限公司 | Based on modular expansible Intelligent refuse classification apparatus and method |
| CN112952933A (en) * | 2021-02-03 | 2021-06-11 | 广州视源电子科技股份有限公司 | Interface expansion device, electronic device and interface expansion method |
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Application publication date: 20140924 |