CN207924572U - A kind of standby power circuit and intelligent interaction tablet - Google Patents
A kind of standby power circuit and intelligent interaction tablet Download PDFInfo
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- CN207924572U CN207924572U CN201820379964.5U CN201820379964U CN207924572U CN 207924572 U CN207924572 U CN 207924572U CN 201820379964 U CN201820379964 U CN 201820379964U CN 207924572 U CN207924572 U CN 207924572U
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Abstract
The utility model discloses a kind of standby power circuit and intelligent interaction tablet, which includes CPU, MCU, communication interface, interface insertion detection circuit and power control circuit；Feeder ear, the feeder ear of interface insertion detection circuit and the feeder ear of power control circuit of CPU is all connected with power supply；Communication interface is used for docking device；The input terminal connection communication interface of interface insertion detection circuit, interface insertion detection circuit are used for the input terminal of the output end connection CPU of the output trigger signal when detecting that equipment is inserted into communication interface；CPU is used to export the Enable Pin of the output end connection power control circuit of effective enable signal；Feeder ear of the power control circuit for the output end connection MCU of out-put supply signal when receiving effective enable signal.The utility model can meet the needs of reducing power consumption and communication interface standard customization and realize that the HDMI CEC under standby mode wake up.
Description
Technical field
The utility model embodiment is related to technical field of power management more particularly to a kind of standby power circuit and intelligence is handed over
Mutual tablet.
Background technology
Currently, the large-screen display equipment of such as intelligent interaction tablet etc is, it can be achieved that fixed according to different user demands
Communication interface standard processed, such as when there is external equipment to be inserted into communication interface, the intelligent interaction tablet with multiple display channels
Or TV can be switched to the channel corresponding to communication interface with Auto Power On and by display channel, or some application is shown automatically
The interface of program.Since the serial ports quantity of CPU (Central Processing Unit, central processing unit) is limited, communication interface
Generally require by MCU ((Microcontroller Unit, micro-control unit) connect CPU, MCU receive from communication connects
Go out being executed for task according to the protocol analysis of customization after the data-signal of mouth, consigns to CPU processing, or forward by MCU
Data go out being executed for task and processing by CPU according to the protocol analysis of customization.
In order to save stand-by power consumption and realize the insertions function agreement customization of communication interface, in the standby state, generally set
MCU work is set, CPU does not work.When communication interface has equipment insertion, MCU receives the data-signal from communication interface, meeting
CPU work is waken up, to cooperate with the insertions function customization for completing communication interface.But the function of electronic equipment becomes increasingly abundant, example
Such as have HDMI-CEC (High Definition Multimedia Interface-Consumer Electronics
Control, the consumer electronics of high-definition multimedia interface control standard) function, electronic equipment can control HDMI interface
The equipment connected, but HDMI-CEC functions need to be executed by the CPU of electronic equipment, and the Opportunity awaiting control for linear scheme of the prior art can not
Realize that the HDMI-CEC under standby mode wakes up.
Utility model content
The utility model embodiment provides a kind of standby power circuit and intelligent interaction tablet, can meet reduce power consumption with
And the demand of communication interface standard customization, and can realize that the HDMI-CEC under standby mode wakes up.
In a first aspect, the utility model embodiment provides a kind of standby power circuit, including CPU, MCU, communication interface,
Interface insertion detection circuit and power control circuit；
The feeder ear of the CPU, the interface insertion detection circuit feeder ear and the power control circuit power supply
End is all connected with power supply；
The communication interface is used for docking device；
The input terminal of the interface insertion detection circuit connects the communication interface, and the interface insertion detection circuit is used for
The output end that trigger signal is exported when detecting that equipment is inserted into the communication interface connects the input terminal of the CPU；It is described
The output end that CPU is used to export effective enable signal when receiving trigger signal connects the enabled of the power control circuit
End；Output end of the power control circuit for the out-put supply signal when Enable Pin receives effective enable signal connects institute
State the feeder ear of MCU.
Second aspect, the utility model embodiment provide a kind of intelligent interaction tablet, including the utility model is arbitrarily implemented
The standby power circuit that example provides.
The utility model embodiment, in the standby state, power supply are only CPU, interface insertion detection circuit, power supply control electricity
Road powers, and realizes standby mode low-power consumption, and HDMI-CEC wake-ups may be implemented in standby lower work in CPU；Interface is inserted into inspection
Slowdown monitoring circuit connects CPU, therefore CPU can know have equipment to be inserted into communication interface, enable power control circuit out-put supply signal
It powers for MCU, to realize the customizing functions of communication interface.It solves the standby lower MCU work of the prior art, cannot achieve
The problem of HDMI-CEC wakes up has to meet the needs of reducing power consumption and communication interface standard customization and realize and wait for
The effect that HDMI-CEC under machine state wakes up.
Description of the drawings
Fig. 1 is the structural schematic diagram for the standby power circuit that the utility model embodiment one provides；
Fig. 2 is the structural schematic diagram for the standby power circuit that the utility model embodiment two provides.
Specific implementation mode
The utility model is described in further detail with reference to the accompanying drawings and examples.It is understood that herein
Described specific embodiment is used only for explaining the utility model, rather than the restriction to the utility model.It further needs exist for
It is bright, it illustrates only for ease of description, in attached drawing and the relevant part of the utility model rather than entire infrastructure.
Embodiment one
Fig. 1 is the structural schematic diagram for the standby power circuit that the utility model embodiment one provides.The standby power circuit
It can apply in arbitrarily needing completion HDMI-CEC to wake up and need to realize the electronic equipment of communication interface standard customization, such as
Television set, intelligent interaction tablet etc., skilled person will appreciate that, electronic equipment includes power supply 15.As shown, this is standby
Power supply circuit includes CPU 11, MCU 12, communication interface 13, interface insertion detection circuit 14 and power control circuit 16.
The feeder ear of the feeder ear of CPU 11, the feeder ear of interface insertion detection circuit 14 and power control circuit 16 connects
Connecing power supply 15, i.e. power supply 15 is directly that CPU 11, interface insertion detection circuit 14 and power control circuit 16 are powered, CPU 11,
Interface insertion detection circuit 14 and power control circuit 16 are in running order always.
Communication interface 13 is used for docking device.Communication interface 13 can be that RS232 interface or USB interface etc. are set for grafting
Standby interface.It should be noted that the equipment of grafting should be set by the application of communication interface 13 and the standby power circuit
The standby other equipment to establish a connection.Such as the PC being connect with intelligent interaction tablet by RS232 interface.
Interface insertion detection circuit 14 be it is a kind of for detecting whether have equipment be inserted into communication interface 13 circuit module,
In the present embodiment, input terminal connection communication interface 13 is used for the output when having detected that equipment is inserted into communication interface 13 and touches
The input terminal B of the output terminals A connection CPU 11 of signalling, i.e., when there is equipment to be inserted into communication interface 13, interface is inserted into detection electricity
Road 14 can send a trigger signal notice CPU 11.
CPU 11 is used to export the output end C connection power control circuits of effective enable signal when receiving trigger signal
16 Enable Pin D.Circuit with Enable Pin, could work simultaneously output signal when receiving effective enable signal.In this reality
It applies in example, power control circuit 16 has the output end for the out-put supply signal when Enable Pin receives effective enable signal
E, the output end connect the feeder ear of MCU 12, i.e., when there is equipment insertion in communication interface 13, CPU 11 enables power supply control
16 out-put supply signal of circuit is powered for MCU 12.
By above-mentioned standby power circuit structure, in the standby state, CPU 11, interface insertion detection circuit 14, electricity
Source control circuit 16 works, and MCU 12 does not work, and when there is equipment insertion in communication interface 13, CPU 11 can enable power supply control
Circuit 16 be MCU 12 power so that MCU 12 it is in running order, to MCU 12 can with CPU 11 jointly complete according to
The communication interface standard of family demand customization.
In conclusion the technical solution of the present embodiment, in the standby state, it is electric that power supply is only CPU, interface is inserted into detection
Road, power control circuit power supply, realize standby mode low-power consumption, and CPU may be implemented HDMI-CEC and call out in standby lower work
It wakes up；Interface insertion detection circuit connects CPU, therefore CPU can know have equipment to be inserted into communication interface, enable power control circuit
Out-put supply signal is powered for MCU, to realize the customizing functions of communication interface.Solve the standby lower MCU work of the prior art,
Cannot achieve the problem of HDMI-CEC wakes up, have can meet reduce the needs of power consumption and communication interface standard customize and
It can realize the effect that the HDMI-CEC under standby mode wakes up.
Embodiment two
Fig. 2 is the structural schematic diagram for the standby power circuit that the utility model embodiment two provides.The present embodiment is upper one
On the basis of embodiment, a kind of preferred scheme for realizing communication interface standard customization is provided.Specifically, in the present embodiment,
Standby power circuit includes CPU 11, MCU 12, communication interface 13, interface insertion detection circuit 14 and power control circuit 16.
The feeder ear of the feeder ear of CPU 11, the feeder ear of interface insertion detection circuit 14 and power control circuit 16 connects
Connect power supply 15.Communication interface 13 is used for docking device.The input terminal connection communication interface 13 of interface insertion detection circuit 14, interface
The output terminals A that insertion detection circuit 14 is used for the output trigger signal when detecting that equipment is inserted into communication interface 13 connects CPU
11 input terminal B, CPU 11 is used to export the output end C connection power supplys control of effective enable signal when receiving trigger signal
The Enable Pin D of circuit 16.Power control circuit 16 is used for the out-put supply signal when Enable Pin receives effective enable signal
The feeder ear of output end E connections MCU, i.e., when there is equipment insertion in communication interface 13, CPU 11 enables power control circuit 16
Out-put supply signal is powered for MCU.
Preferably, MCU 12 includes the data input pin for receiving the data-signal from equipment, and for sending
The data output end of the data-signal after encapsulation, the data input pin connection communication interface 13, data output end connect CPU
11 receiving terminal for receiving the data-signal.In the preferred embodiment, MCU 12 only encapsulates the data-signal of equipment
Forward process parses data-signal and is handled and completed by CPU 11 according to agreement, and advantage is when change is fixed
When agreement processed, it is only necessary to update the program of CPU 11, the program of MCU 12 need not be updated, reduce the cost that exploitation is safeguarded.
In other embodiment, the agreement customized according to user demand can be completed in MCU 12, then MCU 12 is receiving data letter
Number when, according to the agreement of customization, the needing to execute of the task can be parsed, will need the task institute that CPU 11 is handled right accordingly
The instruction answered is sent to the execution of CPU 11.Alternatively, before the port of CPU 11 and communication interface 13 directly can match connection
It puts, the data-signal of equipment directly can also be sent to CPU 11 by communication interface 13.
On the basis of said program, communication interface 13 can be RS232 interface.As shown in Fig. 2, due to the end of MCU 12
Mouth is usually UART interface, and therefore, the present embodiment standby power circuit further includes the RS232 interface signal conversion for that will input
For the interface conversion circuit 21 of the UART interface signal of output.The input terminal of the interface conversion circuit 21 connects RS232 interface 13,
Output end connects the data input pin of MCU 12.
In order to save standby energy consumption, the feeder ear of the output end connecting interface conversion circuit 21 of power control circuit 16.I.e.
Interface conversion circuit 21 only just works on power when there is equipment insertion in RS232 interface 13.
In conclusion the technical solution of the present embodiment, in the standby state, it is electric that power supply is only CPU, interface is inserted into detection
Road, power control circuit power supply, realize standby mode low-power consumption, and CPU may be implemented HDMI-CEC and call out in standby lower work
It wakes up；Interface insertion detection circuit connects CPU, therefore CPU can know have equipment to be inserted into communication interface, enable power control circuit
Out-put supply signal is powered for MCU, to realize the customizing functions of communication interface.Also, realization customization provided in this embodiment
The preferred embodiment of agreement can also reduce exploitation maintenance cost.
It should be noted that power control circuit 16 is that ability out-put supply is believed when Enable Pin receives effective enable signal
Number circuit, can be there are many embodiment.For example, power control circuit 16 is when Enable Pin receives effective enable signal
The switching circuit of feeder ear and output end conducting can use the three ports for control switching devices such as triode, field-effect tube or its derivation
Device is realized.Power control circuit 16 or the circuit with voltage conversion function, as receive effectively in Enable Pin
The voltage conversion circuit to work when enable signal, further, power control circuit 16 can also realize signal at work
Processing, keeps the power supply signal of output more stable.
Embodiment three
The utility model embodiment three provides a kind of intelligent interaction tablet, including the utility model any embodiment provides
Standby power circuit.
Intelligent interaction tablet provided in this embodiment includes the standby power circuit that the utility model any embodiment provides,
Therefore, has corresponding advantageous effect.
It should be noted that without conflicting with each other, those skilled in the art can will retouch in this specification
The feature of the different embodiments or examples and different embodiments or examples stated is combined.
In addition, term " first ", " second " are used for description purposes only, it is not understood to indicate or imply relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.
Note that above are only the preferred embodiment and institute's application technology principle of the utility model.Those skilled in the art's meeting
Understand, the utility model is not limited to specific embodiment described here, can carry out for a person skilled in the art various bright
Aobvious variation is readjusted and is substituted without departing from the scope of protection of the utility model.Therefore, although passing through above example
The utility model is described in further detail, but the utility model is not limited only to above example, is not departing from
Can also include other more equivalent embodiments in the case that the utility model is conceived, and the scope of the utility model is by appended
Right determine.
Claims (8)
1. a kind of standby power circuit, which is characterized in that including CPU, MCU, communication interface, interface insertion detection circuit and power supply
Control circuit；
The feeder ear of the feeder ear of the CPU, the feeder ear of the interface insertion detection circuit and the power control circuit is equal
Connect power supply；
The communication interface is used for docking device；
The input terminal of the interface insertion detection circuit connects the communication interface, and the interface insertion detection circuit is for examining
The output end for measuring output trigger signal when equipment is inserted into the communication interface connects the input terminal of the CPU；The CPU is used
The Enable Pin of the power control circuit is connected in the output end for exporting effective enable signal when receiving trigger signal；It is described
Power control circuit is used for the output end of out-put supply signal when Enable Pin receives effective enable signal and connects the MCU's
Feeder ear.
2. standby power circuit as described in claim 1, which is characterized in that the MCU includes for receiving from equipment
The data input pin of data-signal, and the data output end for sending the data-signal after encapsulation, the CPU includes
The data input pin of receiving terminal for receiving the data-signal, the MCU connects the communication interface, the number of the MCU
The receiving terminal of the CPU is connected according to output end.
3. standby power circuit as claimed in claim 2, which is characterized in that the communication interface is RS232 interface.
4. standby power circuit as claimed in claim 3, which is characterized in that the data input pin of the MCU is UART interface,
The standby power circuit further includes the interface of the UART interface signal for the RS232 interface signal of input to be converted to output
Conversion circuit；The input terminal of the interface conversion circuit connects the RS232 interface, and the data that output end connects the MCU are defeated
Enter end.
5. standby power circuit as claimed in claim 4, which is characterized in that the output end of the power control circuit is also connected with
The feeder ear of the interface conversion circuit.
6. such as standby power circuit described in any one of claim 1 to 5, which is characterized in that the power control circuit be
When Enable Pin receives effective enable signal, the switching circuit of feeder ear and output end conducting.
7. such as standby power circuit described in any one of claim 1 to 5, which is characterized in that the power control circuit be
Enable Pin receives the voltage conversion circuit to work when effective enable signal.
8. a kind of intelligent interaction tablet, which is characterized in that including standby power circuit as described in any one of claim 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820379964.5U CN207924572U (en) | 2018-03-20 | 2018-03-20 | A kind of standby power circuit and intelligent interaction tablet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820379964.5U CN207924572U (en) | 2018-03-20 | 2018-03-20 | A kind of standby power circuit and intelligent interaction tablet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207924572U true CN207924572U (en) | 2018-09-28 |
Family
ID=63595783
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820379964.5U Active CN207924572U (en) | 2018-03-20 | 2018-03-20 | A kind of standby power circuit and intelligent interaction tablet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207924572U (en) |
-
2018
- 2018-03-20 CN CN201820379964.5U patent/CN207924572U/en active Active
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