CN208421807U - A kind of detection circuit of Type-C interface - Google Patents
A kind of detection circuit of Type-C interface Download PDFInfo
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- CN208421807U CN208421807U CN201821189670.2U CN201821189670U CN208421807U CN 208421807 U CN208421807 U CN 208421807U CN 201821189670 U CN201821189670 U CN 201821189670U CN 208421807 U CN208421807 U CN 208421807U
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
Abstract
The utility model relates to a kind of detection circuits of Type-C interface, by the way that a Type-C connecting detection unit is arranged, (Type-C interface is connectionless) in stand-by mode, only need to open Type-C connecting detection unit, after Type-C connecting detection unit recognizes equipment connection, wake-up signal just is issued to ADC voltage detection unit, then ADC voltage detection unit just starts to detect the voltage at the end CC, it does not need ADC voltage detection unit and voltage detecting constantly is carried out to the end CC, to effectively reduce the stand-by power consumption of Type-C product.In addition, the Type-C connecting detection unit is only needed using data selector, comparator and some logic gates, so that it may which the function of realizing insertion detection and wake up, circuit structure is simple, and hardware cost is lower, and detection mode is simple, and detection efficiency is higher.
Description
Technical field
The utility model relates to USB technical fields, and in particular to a kind of detection circuit of Type-C interface.
Background technique
USB Type-C Power Delivery agreement (hereinafter referred to as PD agreement) is a kind of based on Type-C interface
Power transmission protocol.USB-PD maximum can support 100W(20V/5A) power transmission, while support power supply role transforming, can expire
Sufficient Most electronic equipment power demands.Since USB-IF releases Type-C interface, the flagship type base of major cell phone manufacturer
This all uses Type-C interface.In the Type-C communication of PD agreement, the first step is to identify the connection of Type-C equipment first.
According to PD protocol specification, the device type of Type-C can be divided into UFP, DFP or DRP, and it is several that power is divided into 0.5A, 1.5A, 3A etc.
Rank.Need to identify the type and power of access device after the connection of Type-C equipment according to the voltage on CC line.This is just needed
A kind of method of simple and effective identification Type-C equipment connection.The utility model that one patent publication No. is CN204833262U is special
Benefit, discloses a kind of identification circuit of USB Type-C interface, and although which can be realized the identification of Type-C, but circuit
It is to be made up of field-effect tube and electronic switch, component is more in circuit composition, and circuit structure is complicated, identifies and judge process
Cumbersome, reaction is slowly.China Patent Publication No. is the utility application of CN106445868A, discloses a kind of ADC type
Type-C automatic identification circuit, the circuit are provided with ADC, and the ADC is connected to CC mouthfuls at least one set of, pass through ADC test two
A CC mouthfuls of voltage, judges two CC mouthfuls of voltage range, to obtain the connection of Type-C interface.Although the circuit energy
Enough realize the identification of Type-C, but in the case where Type-C interface is connectionless, it is still necessary to ADC does not stop to detect to CC mouthfuls, from
And cause the stand-by power consumption of product very big, it is not well positioned to meet application demand.
Utility model content
The utility model provides a kind of detection circuit of Type-C interface, can reduce the standby function of Type-C product
Consumption, meanwhile, circuit structure and detection mode are simple, and detection efficiency is high, and hardware cost is lower.Specific technical solution is as follows:
A kind of detection circuit of Type-C interface, comprising: Type-C connecting detection unit, for work based on the received
The voltage that the end CC inputs is compared by operation mode signal with reference voltage, and exports wake-up signal to ADC according to comparison result
Voltage detection unit；The ADC voltage detection unit, and the Type-C connecting detection unit, for receiving the Type-
After the wake-up signal that C connecting detection unit issues, the voltage at the end CC is AD converted, then the result of AD conversion voltage
It exports to Type-C connection recognition unit；The Type-C connection recognition unit, connect with the ADC voltage detection unit, uses
In the result of the AD conversion voltage exported according to the ADC voltage detection unit come identify access Type-C interface equipment.
Further, the end CC includes: the first end CC, for inputting the first CC voltage；2nd end CC, for inputting the
Two CC voltages.
Further, the Type-C connecting detection unit includes: data selector, is used for from its mode signal input terminal
Operating mode signal is received, and the first reference electricity that signal inputs its first reference voltage input terminal according to the operation mode
Pressure and the second reference voltage of its second reference voltage input terminal input carry out selection output；First comparator, negative input end
It is connect with the output end of the data selector, positive input terminal is then connected to the first end CC, for selecting the data
The reference voltage for selecting device output is compared with the first CC voltage that the first end CC inputs, and exports comparison result；Second
Comparator, negative input end are connect with the output end of the data selector, and positive input terminal is then connected to the 2nd end CC,
Reference voltage for exporting the data selector is compared with the 2nd CC voltage that the 2nd end CC inputs, and defeated
Comparison result out；First XOR gate, first input end are connect with the output end of the first comparator, and the second input terminal is then
It is connected to the mode signal input terminal, the signal for exporting the first comparator and the operating mode signal carry out
It is exported after XOR operation；Second XOR gate, first input end are connect with the output end of second comparator, the second input
End is then connected to the mode signal input terminal, the signal for exporting second comparator and the operating mode signal
It is exported after carrying out XOR operation；Or door, first input end are connected to the output end of first XOR gate, the second input terminal
It is then connected to the output end of second XOR gate, the signal for exporting first XOR gate and second XOR gate
After the signal progress or operation of output, passes through its output end and export wake-up signal to the ADC voltage detection unit.
The detection circuit of Type-C interface described in the utility model, by the way that a Type-C connecting detection unit is arranged,
(Type-C interface is connectionless) in stand-by mode, it is only necessary to Type-C connecting detection unit is opened, when Type-C connecting detection
After unit recognizes equipment connection, wake-up signal just is issued to ADC voltage detection unit, then ADC voltage detection unit is just opened
The voltage at the beginning detection end CC, does not need ADC voltage detection unit and constantly carries out voltage detecting to the end CC, to effectively reduce
The stand-by power consumption of Type-C product.In addition, the Type-C connecting detection unit only need using data selector, comparator and
Some logic gates, so that it may which the function of realizing insertion detection and wake up, circuit structure is simple, and hardware cost is lower, and examines
Survey mode is simple, and detection efficiency is higher.
Detailed description of the invention
Fig. 1 is the circuit structure block diagram of the detection circuit of Type-C interface described in the utility model.
Fig. 2 is the circuit diagram of Type-C connecting detection unit described in the utility model.
Fig. 3 is the flow diagram of the detection method of Type-C interface described in the utility model.
Fig. 4 is the flow diagram of the detection method of Type-C interface described in the utility model.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Detailed description.It should be appreciated that specific embodiment disclosed below is only used for explaining the utility model, it is not used to limit this reality
With novel.In the following description, detail is provided to provide a thorough understanding of embodiments.However, this field is common
The skilled person will understand that may be practiced without these specific details embodiment.For example, circuit can be in block diagrams
It has been shown that, so as not to make embodiment fuzzy in unnecessary details.It in other cases, can not in order not to obscure embodiment
Display the details of well known circuit, structure and technology.
As shown in Figure 1, the detection circuit of the Type-C interface include sequentially connected Type-C connecting detection unit,
ADC voltage detection unit connects recognition unit with Type-C.The Type-C connecting detection unit is for based on the received
The end CC (CC1, CC2) voltage inputted is compared with reference voltage, and ties according to comparing by operating mode signal mode_sel
Fruit exports wake-up signal to ADC voltage detection unit.The input terminal of the ADC voltage detection unit connect inspection with the Type-C
The output end connection for surveying unit, after receiving the wake-up signal that the Type-C connecting detection unit issues, to CC
The voltage at end (CC1, CC2) is AD converted, then the result of AD conversion voltage is exported to Type-C connection recognition unit.It is described
The input terminal of Type-C connection recognition unit is connect with the output end of the ADC voltage detection unit, for according to the ADC electricity
The result of the AD conversion voltage of pressure detection unit output determines the type of access device come the equipment for identifying access Type-C interface
And power.Wherein, the operating mode signal mode_sel can be provided by external Digital Logical Circuits or MCU.The electricity
Road is by one Type-C connecting detection unit of setting, in stand-by mode (Type-C interface is connectionless), it is only necessary to open
Type-C connecting detection unit just sends out ADC voltage detection unit after Type-C connecting detection unit recognizes equipment connection
Wake-up signal out, then ADC voltage detection unit just starts to detect the voltage at the end CC, does not need ADC voltage detection unit constantly
Ground carries out voltage detecting to the end CC, to effectively reduce the stand-by power consumption of Type-C product.
Specifically, the end CC includes the first end CC CC1 and the 2nd end CC CC2.First end the CC CC1 is for inputting the
One CC voltage.2nd end CC CC2 is for inputting the 2nd CC voltage.The first CC voltage and the 2nd CC voltage are all transmitted to
Type-C connecting detection unit and ADC voltage detection unit.
As one of embodiment, the Type-C connecting detection unit includes data selector mux_sel, first
Comparator comp1, the second comparator comp2, the first XOR gate xor1, the second XOR gate xor2 and one or or.The number
It is used to receive operating mode signal mode_sel from its mode signal input terminal according to selector mux_sel, and according to the work
The first reference voltage (0.2V) and its second reference electricity that mode signal mode_sel inputs its first reference voltage input terminal
The second reference voltage (2.6V) of pressure input terminal input carries out selection output.The negative input end of the first comparator comp1 with
The output end of the data selector mux_sel connects, and positive input terminal is then connected to the first end the CC CC1, is used for institute
State the reference voltage (0.2V or 0.6V) of data selector mux_sel output and the first CC electricity of the first end CC CC1 input
Pressure is compared, and exports comparison result.The negative input end and the data selector mux_ of the second comparator comp2
The output end of sel connects, and positive input terminal is then connected to the 2nd end the CC CC2, is used for the data selector mux_sel
The reference voltage (0.2V or 0.6V) of output is compared with the 2nd end the CC CC2 the 2nd CC voltage inputted, and exports ratio
Relatively result.The first input end of the first XOR gate xor1 is connect with the output end of the first comparator comp1, and second
Input terminal is then connected to the mode signal input terminal, the signal comp_cc1 for exporting the first comparator with it is described
Operating mode signal mode_sel is exported after carrying out XOR operation.The first input end of the second XOR gate xor2 and described the
The output end of two comparator comp2 connects, and the second input terminal is then connected to the mode signal input terminal, for by described the
The signal comp_cc2 and operating mode signal mode_sel of two comparators output is exported after carrying out XOR operation.It is described or
The first input end of door is connected to the output end of the first XOR gate xor1, and it is different that the second input terminal is then connected to described second
Or the output end of door xor2, the signal wake_up_cc1 and second XOR gate for exporting first XOR gate are defeated
After signal wake_up_cc2 progress or operation out, passes through its output end and export wake-up signal wake_up to the ADC voltage
Detection unit.The Type-C connecting detection unit is only needed using data selector, comparator and some logic gates, just
Insertion detection and the function of waking up may be implemented, circuit structure is simple, and hardware cost is lower, and detection mode is simple, detection effect
Rate is higher.
As shown in figure 3, a kind of detection method of Type-C interface, includes the following steps: that Type-C connecting detection unit connects
Knock off operation mode signal, operating mode signal, the voltage that the end CC inputs is compared with reference voltage based on the received,
And wake-up signal is exported to ADC voltage detection unit according to comparison result；The ADC voltage detection unit receives described
After the wake-up signal that Type-C connecting detection unit issues, the voltage at the end CC is AD converted, then AD conversion voltage
Result export to Type-C connection recognition unit；The Type-C connection recognition unit is according to the ADC voltage detection unit
The result of the AD conversion voltage of output come identify access Type-C interface equipment.The method is by first opening Type-C connection
Detection unit just issues ADC voltage detection unit and wakes up letter after Type-C connecting detection unit recognizes equipment connection
Number, then ADC voltage detection unit just starts to detect the voltage at the end CC, does not need ADC voltage detection unit constantly to the end CC
Voltage detecting is carried out, to effectively reduce the stand-by power consumption of Type-C product.
Preferably, the Type-C connecting detection unit receives operating mode signal, based on the received operating mode
The voltage that the end CC inputs is compared by signal with reference voltage, and is exported wake-up signal to ADC voltage according to comparison result and examined
The step of surveying unit specifically comprises the following steps: that the data selector in the Type-C connecting detection unit is believed from its mode
Number input terminal receives operating mode signal, and according to the operation mode signal its first reference voltage input terminal is inputted the
One reference voltage and the second reference voltage of its second reference voltage input terminal input carry out selection output；The Type-C connection
The first of reference voltage and the first end CC input that first comparator in detection unit exports the data selector
CC voltage is compared, and exports comparison result；The second comparator in the Type-C connecting detection unit is by the data
The reference voltage of selector output is compared with the 2nd CC voltage that the 2nd end CC inputs, and exports comparison result；Institute
State the signal and operating mode letter that the first XOR gate in Type-C connecting detection unit exports the first comparator
Number carry out XOR operation after export；The second XOR gate in the Type-C connecting detection unit exports second comparator
Signal and the operating mode signal carry out XOR operation after export；In the Type-C connecting detection unit or goalkeeper institute
After stating the signal of the first XOR gate output and the signal progress or operation of second XOR gate output, exported by its output end
Wake-up signal is to the ADC voltage detection unit.
It specifically, can be different function mode: UFP, DFP or DRP by TYPE_C device configuration according to PD agreement.Its
In, UFP is charge mode, needs to provide RD(pull down resistor in the channel CC)；DFP is discharge mode, needs to provide in the channel CC
RP(pull-up resistor)；DRP is double Role Models, can both be UFP, can also be DFP, need dynamically to cut between UFP and DFP
It changes.As shown in figure 4, being currently DRP mode.When Type-C interface is connectionless, circuit enters standby detecting state.To machine examination
Under survey state, Type-C connection identification circuit, it is only necessary to open preposition Type-C connecting detection unit, other circuits, which are in, sleeps
It sleeps, to guarantee lower stand-by power consumption.Wherein, operating mode signal mode_sel can be Digital Logical Circuits or MCU is provided,
As operating mode signal mode_sel=0, indicate in UFP mode；When mode_sel=1, indicate in DFP mode.
In conjunction with Fig. 2 and Fig. 4 it is found that under UFP mode, operating mode signal mode_sel=0, data selector
0.2V voltage as the reference voltage and is sent to first comparator comp1 and the second comparator comp2 by mux_sel selection.When
One CC voltage is greater than 0.2V, and first comparator comp1 output result comp_cc1 sets 1.At this point, signal mode_sel=0,
Comp_cc1=1, the output signal wake_up_cc1 after XOR gate set 1.Similarly, when the 2nd CC voltage be greater than 0.2V,
Second comparator comp2 output result comp_cc2 sets 1.At this point, signal mode_sel=0, comp_cc2=1, process are different
Or output signal wake_up_cc2 behind the door sets 1.
Likewise, operating mode signal mode_sel=1, data selector mux_sel selects handle under DFP mode
2.6V voltage as the reference voltage and is sent to first comparator comp1 and the second comparator comp2.When the first CC voltage is less than
2.6V, first comparator comp1 output result comp_cc1 set 0.At this point, signal mode_sel=1, comp_cc1=0, warp
Output signal wake_up_cc1 after crossing XOR gate sets 1.Similarly, when the 2nd CC voltage is less than 2.6V, the second comparator comp2
Output result comp_cc2 sets 0.At this point, signal mode_sel=1, comp_cc2=0, the output signal after XOR gate
Wake_up_cc2 sets 1.
Since wake-up signal wake_up is signal wake_up_cc1 and signal wake_up_cc2, by or behind the door defeated
Signal out, if signal wake_up_cc1 or wake_up_cc2 one of them set 1, wake-up signal wake_up sets 1, triggers institute
State the start-up operation of ADC voltage detection unit.
When machine testing, according to different operating modes, judge whether Type-C interface connects other equipment.Offer is provided
When RD, work in UFP mode.Under UFP mode, when Type-C interface is connectionless, voltage is 0 on CC1 and CC2.It is assisted according to PD
View judges that Type-C interface has connection when Type-C connecting detection unit detects that voltage is greater than 0.2V on CC1 or CC2.
When providing RP, work in DFP mode.Under DFP mode, when Type-C interface is connectionless, voltage is 5V on CC1 and CC2.Root
According to PD agreement, when Type-C connecting detection unit, when detecting that voltage is less than 2.6V on CC1 or CC2, Type-C interface is judged
There is connection.When Type-C interface has connection, ADC voltage detection unit is waken up.ADC timesharing carries out AD to the voltage of CC1 and CC2
Conversion.Finally, Type-C connection recognition unit identifies that access Type-C interface is set with AD conversion voltage results according to PD agreement
Standby type and power.
Obviously, the above embodiments are only the utility model a part of the embodiment, instead of all the embodiments, each
Technical solution between embodiment can be combined with each other.If occurring the terms such as " first ", " second ", " third " in embodiment,
It is the differentiation for the ease of correlated characteristic, should not be understood as indication or suggestion its relative importance, the successive or technology of order
The quantity of feature.Those of ordinary skill in the art will appreciate that: realize that all or part of the steps of above-mentioned each method embodiment can
To be done through the relevant hardware of the program instructions.These programs can store in computer-readable storage medium (such as
The various media that can store program code such as ROM, RAM, magnetic or disk) in.When being executed, it includes upper for executing to the program
The step of stating each method embodiment.
Finally, it should be noted that the above various embodiments is only to illustrate the technical solution of the utility model, rather than it is limited
System；Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should
Understand: it is still possible to modify the technical solutions described in the foregoing embodiments, or to some or all of
Technical characteristic is equivalently replaced；And these are modified or replaceed, it does not separate the essence of the corresponding technical solution, and this is practical new
The range of each embodiment technical solution of type.
Claims (3)
1. a kind of detection circuit of Type-C interface characterized by comprising
Type-C connecting detection unit, for operating mode signal based on the received, the voltage that the end CC is inputted and reference
Voltage is compared, and exports wake-up signal to ADC voltage detection unit according to comparison result；
The ADC voltage detection unit, and the Type-C connecting detection unit, for receiving the Type-C connecting detection
Unit issue the wake-up signal after, the voltage at the end CC is AD converted, then the result of AD conversion voltage export to
Type-C connection recognition unit；
The Type-C connection recognition unit, connect with the ADC voltage detection unit, for according to the ADC voltage detecting
Unit output AD conversion voltage result come identify access Type-C interface equipment.
2. circuit according to claim 1, which is characterized in that the end CC includes:
First end CC, for inputting the first CC voltage；
2nd end CC, for inputting the 2nd CC voltage.
3. circuit according to claim 2, which is characterized in that the Type-C connecting detection unit includes:
Data selector, for receiving operating mode signal, and signal according to the operation mode from its mode signal input terminal
Second reference of the first reference voltage and the input of its second reference voltage input terminal to the input of its first reference voltage input terminal
Voltage carries out selection output；
First comparator, negative input end are connect with the output end of the data selector, and positive input terminal is then connected to described
The first CC voltage at the first end CC, reference voltage and the first end CC input for exporting the data selector carries out
Compare, and exports comparison result；
Second comparator, negative input end are connect with the output end of the data selector, and positive input terminal is then connected to described
The 2nd CC voltage at the 2nd end CC, reference voltage and the 2nd end CC input for exporting the data selector carries out
Compare, and exports comparison result；
First XOR gate, first input end are connect with the output end of the first comparator, and the second input terminal is then connected to
The mode signal input terminal, signal and the operating mode signal for exporting the first comparator carry out exclusive or fortune
It is exported after calculation；
Second XOR gate, first input end are connect with the output end of second comparator, and the second input terminal is then connected to
The mode signal input terminal, signal and the operating mode signal for exporting second comparator carry out exclusive or fortune
It is exported after calculation；
Or door, first input end are connected to the output end of first XOR gate, the second input terminal is then connected to described
The signal of the output end of two XOR gates, signal and second XOR gate output for exporting first XOR gate carries out
Or after operation, wake-up signal is exported to the ADC voltage detection unit by its output end.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821189670.2U CN208421807U (en) | 2018-07-26 | 2018-07-26 | A kind of detection circuit of Type-C interface |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821189670.2U CN208421807U (en) | 2018-07-26 | 2018-07-26 | A kind of detection circuit of Type-C interface |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113590521A (en) * | 2021-06-24 | 2021-11-02 | 深圳市广和通无线股份有限公司 | USB interface module, device, data transmission interface module and communication system |
| CN113945869A (en) * | 2021-12-20 | 2022-01-18 | 深圳佑驾创新科技有限公司 | Positive and negative connection identification circuit, method, equipment and system of interface |
| CN114189145A (en) * | 2020-09-14 | 2022-03-15 | 瑞昱半导体股份有限公司 | Voltage modulation circuit and method thereof |
| CN114236240A (en) * | 2022-02-25 | 2022-03-25 | 荣耀终端有限公司 | Liquid inlet detection circuit and electronic equipment |
| CN117250566A (en) * | 2023-09-18 | 2023-12-19 | 珠海智融科技股份有限公司 | Type-C connection detection circuit and electronic equipment |
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2018
- 2018-07-26 CN CN201821189670.2U patent/CN208421807U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114189145A (en) * | 2020-09-14 | 2022-03-15 | 瑞昱半导体股份有限公司 | Voltage modulation circuit and method thereof |
| CN113590521A (en) * | 2021-06-24 | 2021-11-02 | 深圳市广和通无线股份有限公司 | USB interface module, device, data transmission interface module and communication system |
| CN113945869A (en) * | 2021-12-20 | 2022-01-18 | 深圳佑驾创新科技有限公司 | Positive and negative connection identification circuit, method, equipment and system of interface |
| CN113945869B (en) * | 2021-12-20 | 2022-03-15 | 深圳佑驾创新科技有限公司 | Positive and negative connection identification circuit, method, equipment and system of interface |
| CN114236240A (en) * | 2022-02-25 | 2022-03-25 | 荣耀终端有限公司 | Liquid inlet detection circuit and electronic equipment |
| CN114236240B (en) * | 2022-02-25 | 2023-10-20 | 荣耀终端有限公司 | Liquid inlet detection circuit and electronic equipment |
| CN117250566A (en) * | 2023-09-18 | 2023-12-19 | 珠海智融科技股份有限公司 | Type-C connection detection circuit and electronic equipment |
| CN117250566B (en) * | 2023-09-18 | 2024-05-03 | 珠海智融科技股份有限公司 | Type-C connection detection circuit and electronic equipment |
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