CN208737453U - Circuit and electronic equipment based on general-purpose serial bus USB interface - Google Patents
Circuit and electronic equipment based on general-purpose serial bus USB interface Download PDFInfo
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- CN208737453U CN208737453U CN201821047889.9U CN201821047889U CN208737453U CN 208737453 U CN208737453 U CN 208737453U CN 201821047889 U CN201821047889 U CN 201821047889U CN 208737453 U CN208737453 U CN 208737453U
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Abstract
The utility model provides circuit and electronic equipment based on general-purpose serial bus USB interface.The circuit of USB interface includes: usb interface unit, including multiple pins, for connecting a variety of peripheral apparatus；Power Management Unit PMU, and usb interface unit data connection, for managing and detecting the plug of peripheral apparatus；At least one switch unit, it is electrically connected respectively at least one pin in multiple pins, each switch unit in wherein at least one switch unit includes at least one switch, circuit corresponding at least one of a variety of peripheral apparatus peripheral apparatus is electrically connected wherein at least one switch respectively, and at least one peripheral apparatus includes universal asynchronous receiving-transmitting transmitter UART.The utility model integrates four-in-one USB interface, can simplify the structure and appearance of mobile phone by a miniature data line micro USB interface, improves the dust-proof of product, the performances such as waterproof, and then promote user experience.
Description
Technical field
The utility model relates to move field of communication technology, and in particular to a kind of electricity based on general-purpose serial bus USB interface
Road and electronic equipment.
Background technique
There are a large amount of mobile phones equipped with miniature data line interface micro USB, 3.0 millimeters of earphone interfaces at present, some mobile phones are also
It can be based on micro USB interface, real there are currently no the technologies for the data transmission OTG in the case where host, carrying out equipment room, allow
The hosts such as PC PC can not be passed through between equipment when transmitting data.
Meanwhile in engineering machine debugging, UART interface is also reserved in mobile phone, to facilitate debugging, but these interfaces are all
It is mutually independent, a large amount of volumes in mobile phone are not only taken up, bring difficulty for Project Realization, and bring much for cell phone appearance
Hole both unsightly also influenced the security levels such as dust-proof, waterproof.
Utility model content
In view of this, the utility model embodiment provides a kind of circuit and electricity based on general-purpose serial bus USB interface
Earphone interface, UART interface and OTG interface etc. are integrated in by sub- equipment based on micro USB interface common in electronic equipment
On one micro USB interface, simplify the structure and design of electronic equipment, and improve the dust-proof of electronic equipment, waterproof etc.
Reliability, and then promote user experience.
The first aspect of the utility model embodiment be to provide a kind of circuit based on general-purpose serial bus USB interface and
Electronic equipment, which includes: usb interface unit, including multiple pins, for connecting a variety of peripheral apparatus；Power management list
First PMU, and the usb interface unit data connection, for managing and detecting the plug of the peripheral apparatus；At least one switch
Unit is electrically connected at least one pin in the multiple pin respectively, wherein at least one described switch unit
Each switch unit includes at least one switch, wherein at least one described switch respectively in a variety of peripheral apparatus extremely
A kind of corresponding circuit of peripheral apparatus is electrically connected less, and at least one peripheral apparatus includes universal asynchronous receiving-transmitting transmitter
UART, wherein the Power Management Unit is set at least one peripheral apparatus plug according at least one peripheral hardware
At least one is switched described in standby Type Control, the corresponding pin of the switch unit is connected to outer at least one
If the corresponding circuit of equipment.
In some embodiments, each switch unit at least one described switch unit includes that a single-pole three throw is opened
Pass or three single-pole single-throw switch (SPST)s or a single-pole double-throw switch (SPDT) or two single-pole single-throw switch (SPST)s.
In some embodiments, at least one described switch includes that first switch, second switch and third switch, described
Usb interface unit includes 5 pins.
In some embodiments, 5 pins include: power pins VBUS, be electrically connected the usb interface unit with
The Power Management Unit PMU；Grounding pin GND is electrically connected ground potential；Data signal pin pair, the data-signal draw
Foot to including correction data pin DP and negative data pin DM, the data signal pin to be respectively and electrically connected to it is described at least
Two switch units in one switch unit；Integrated driving Integrated Drive ID pin, be electrically connected to it is described extremely
A switch unit in a few switch unit.
In some embodiments, a variety of peripheral apparatus include USB interface-based equipment, at least one peripheral hardware
Equipment further include: earphone and in the case where no host realizes at least one in the OTG equipment of the data transmission of equipment room
Kind.
In some embodiments, the circuit further includes first resistor, second resistance and 3rd resistor, and a resistance connects
Connect right channel R pin and reference voltage, the second resistance connects the broken ends of fractured bone in the second of the right channel R pin and the PMU
Mouth INT2, the first interruptive port INT1 of 3rd resistor the connection reference voltage and the PMU, wherein the first resistor
Resistance value be 470k ohm；The resistance value of the second resistance is 47k ohm；The resistance value of the 3rd resistor is 5k
ohm；The default conditions of the first interruptive port INT1 are high level；The default conditions of the second interruptive port INT2 are height
Level.
In some embodiments, when the Power Management Unit PMU detects no VBUS insertion and described the
When one interruptive port INT1 is high level, the interface default output is universal asynchronous receiving-transmitting transmitter UART, then the switch
Unit sends the data that the first switch is connected to the universal asynchronous receiving-transmitting transmitter UART on pin TX, by described the
Two switches are connected on the data receiver pin RX of universal asynchronous receiving-transmitting transmitter UART, third switch are connected to described
On first interruptive port INT1, the grounding pin GND is grounded；Or when the Power Management Unit has detected the VBUS
When insertion, it is inserted into if USB interface device or charger, then the first switch is connected to negative data and drawn by the switch unit
On foot DM, the second switch is connected on correction data pin DP, third switch is connected to the first interruptive port
On INT1；If detecting, USB interface device or charger are extracted, and the first switch is connected to described by the switch unit
On TX, the second switch is connected on the RX, third switch is connected on the INT1.
In some embodiments, when the Power Management Unit PMU detects no VBUS insertion, and described the
One interruptive port INT1 is low level and when analog-digital converter ADC detects that input voltage is 0V, the power management
Unit PMU detects that OTG equipment is inserted into, and the first switch is connected on the DM by the switch unit, by described second
Switch is connected on the DP, and third switch is connected on the INT1；If the Power Management Unit PMU is detected
When the first interruptive port INT1 is high level, as OTG equipment is extracted, then the first switch is connected on the TX,
The second switch is connected on the RX, and the third switch is connected on the INT1；Or work as the Power Management Unit
Detect no VBUS insertion, and the first interruptive port INT1 is low level and ADC detects input voltage
It is not 0V, then the Power Management Unit PMU detects that earphone is inserted into, and the first switch is connected to ear by the switch unit
On the R pin of machine, the second switch is connected on the L pin of earphone, third switch is connected to ear
On machine Mike's MIC pin；If detecting, the second interruptive port INT2 is low level, is judged as that earphone is inserted into, if described
Second interruptive port INT2 is high level, then is judged as that the earphone is extracted, then the switch unit connects the first switch
It is connected on the TX, the second switch is connected on the RX, third switch is connected to the broken ends of fractured bone in described first
On mouth INT1.
In some embodiments, when the Power Management Unit PMU detects no VBUS insertion, and described the
One interruptive port INT1 is low level and the ADC detects that input voltage is not 0V, if the second interruptive port INT2
For high level, then judge that insertion is illegal.
The second aspect of the utility model embodiment is to provide a kind of electronic equipment, comprising: electronic equipment itself with it is upper
State the circuit based on general-purpose serial bus USB interface described in embodiment.
A kind of route of bicycle provided by the embodiment of the utility model, which hides protective device and bicycle, to be had as follows
Technical effect:
A kind of circuit and electronic equipment based on general-purpose serial bus USB interface of the utility model embodiment, based on electricity
Common micro USB interface in sub- equipment, by the way that by earphone interface, UART interface, OTG interfacing etc. is integrated in one and connects
On mouth, the structure and appearance of mobile phone can simplify, and improve the dust-proof of product, the performances such as waterproof facilitate engineering design, convenient for surveying
Examination personnel are tested with different male connectors, and then promote user experience.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing, in which:
Fig. 1 is the circuit diagram according to the general-purpose serial bus USB interface of the utility model embodiment.
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
It clearly and completely describes, it is clear that described embodiment is only the utility model a part of the embodiment, rather than whole realities
Apply example.Based on the embodiments of the present invention, those of ordinary skill in the art institute without making creative work
The every other embodiment obtained, fall within the protection scope of the utility model.
Fig. 1 is the circuit diagram according to the general-purpose serial bus USB interface of the utility model embodiment.
As shown in Figure 1, the first aspect of the utility model embodiment is that provide one kind is connect based on general-purpose serial bus USB
The circuit and electronic equipment of mouth, which includes: usb interface unit 10, including multiple pins, is set for connecting a variety of peripheral hardwares
It is standby；Power Management Unit PMU 11, and 10 data connection of usb interface unit, for managing and detecting the plug of peripheral apparatus；Extremely
A few switch unit 12, is electrically connected at least one pin in multiple pins, wherein at least one switch unit respectively
Each switch unit in 12 includes at least one switch, wherein at least one switch respectively in a variety of peripheral apparatus at least
A kind of corresponding circuit of peripheral apparatus is electrically connected, and at least one peripheral apparatus includes universal asynchronous receiving-transmitting transmitter UART,
In, Power Management Unit is when at least one peripheral apparatus plugs, according to the Type Control of at least one peripheral apparatus at least one
The corresponding pin of switch unit is connected to circuit corresponding at least one peripheral apparatus by a switch.
Specifically, in this embodiment, each switch unit at least one switch unit 12 includes a hilted broadsword three
Throw switch or three single-pole single-throw switch (SPST)s or a single-pole double-throw switch (SPDT) or two single-pole single-throw switch (SPST)s, the utility model
The type of switch included by each switch unit at least one switch unit 12 is not particularly limited.
Specifically, in this embodiment, a variety of peripheral apparatus include USB interface-based equipment, and at least one peripheral hardware is set
It is standby further include: earphone and at least one of the OTG equipment of data transmission that equipment room is realized in the case where no host.
Based on the embodiments of the present invention, based on micro USB interface common in electronic equipment, by the way that earphone is connect
Mouthful, UART interface, OTG interfacing etc. is integrated on one interface, can simplify the structure and appearance of mobile phone, and improve product
It is dust-proof, the performances such as waterproof facilitate engineering design, are tested convenient for tester with different male connectors, so promoted user
Experience.
As shown in Figure 1, in the utility model one embodiment, at least one switch includes first switch S1 121, the
Two switch S2 122 and third switch S3 123, usb interface unit include 5 pins, wherein this 5 pins include: that power supply draws
Foot VBUS 101 is electrically connected usb interface unit and Power Management Unit PMU；Grounding pin GND 105 is electrically connected ground electricity
Position；Data signal pin pair, data signal pin is to including correction data pin DP 103 and negative data pin DM 102, data
Signal pins are to two switch units being respectively and electrically connected at least one switch unit；Integrated driving Integrated
104 pin of Drive ID, a switch unit being electrically connected at least one switch unit 12.
Specifically, first switch S1 121 and DM pin 102 are electrically connected, 103 electricity of second switch S2 122 and DP pin
Property connection, third switch S3 123 and ID pin 104 electric connection, according to the access of different peripheral apparatus, switch unit meeting
By first switch S1 121, second switch S2 122 and third switch S3 123 are connected respectively to opposite with the peripheral apparatus of access
On the pin answered, for example, switch unit is by the interface of micro USB female seat when the male connector of UART accesses micro USB female seat
DM pin 102 TX pin 125 is connected to by first switch S1 121, the DP pin 103 of base is passed through into second switch S2
122 are connected to RX pin 128, and the ID pin 104 of base is connected to the first interruptive port INT1 by third switch S3 123
On, the GND pin 105 of base is grounded；For another example when the male connector of common USB accesses the interface of the micro USB female seat
When, the DM pin 102 of the interface of micro USB female seat is connected to DM pin 126 by first switch S1 121 by switch unit,
The DP pin 103 of base is connected to DP pin 127 by second switch S2 122, the ID pin 104 of base is passed through into third
Switch S3 123 is connected on the first interruptive port INT1 131；And when the male connector of OTG accesses the interface of the micro USB female seat
When, the DM pin 102 of the interface of micro USB female seat is connected to DM pin 126 by first switch S1 121 by switch unit,
The DP pin 103 of base is connected to DP pin 127 by second switch S2 122, the ID pin 104 of base is passed through into third
Switch S3 123 is connected on the first interruptive port INT1 131；And when the male connector of common headphones is inserted into the micro USB female seat
Interface when, the DM pin 102 of the interface of micro USB female seat is connected to R and is drawn by switch unit by first switch S1 121
The DP pin 103 of base is connected to L pin 129 by second switch S2 122, the ID pin 104 of base is passed through by foot 124
Third switch S3 123 is connected to MIC pin 130.
It, can be real by the control and being used cooperatively for multiple pins of switch unit based on the embodiments of the present invention
Now to the accurately identification of a variety of peripheral apparatus and control.
As shown in Figure 1, circuit further includes first resistor 134, second resistance 135 in the utility model one embodiment
With 3rd resistor 136, first resistor connects right channel R pin 124 and reference voltage 133, and second resistance connects right channel R pin
With the second interruptive port INT2 of PMU, 3rd resistor connects the first interruptive port INT1 of reference voltage and PMU, wherein first
The resistance value of resistance is 470k ohm；The resistance value of second resistance is 47k ohm；The resistance value of 3rd resistor is 5k ohm；The
The default conditions of one interruptive port INT1 137 are high level；The default conditions of second interruptive port INT2 137 are high level,
The utility model does not do specific limit to the specific size of the resistance value of first resistor 134, second resistance 135 and 3rd resistor 136
System.
Specifically, here first resistor 134, second resistance 135 and 3rd resistor 136 be for playing partial pressure,
Wherein, first resistor 134 and second resistance 135 are used to divide with R pin 124, to change the level of the second interruptive port 137
State；3rd resistor 136 is used to generate partial pressure with earphone Mike MIC 130, to change the level shape of the first interruptive port 131
State, and the type for the peripheral apparatus for assisting judgement to be inserted into according to the level state measured.
Based on the embodiments of the present invention, it is to be appreciated that high level is exactly that circuit is connected, and low level is exactly circuit
It disconnects, the default conditions of the first interruptive port INT1 are high level；The default conditions of second interruptive port INT2 are high level, then
First interruptive port and the second interruptive port default the state being to turn on, by connected on right channel R pin first resistor and
Second resistance, can by partial pressure so that the level of the second interruptive port INT2 converts between high level and low level, and
3rd resistor is arranged on earphone Mike's MIC pin can make the level of the first interruptive port in high level and low level by partial pressure
Between convert, so as to assist Power Management Unit PMU judgement access peripheral apparatus type, thus be micro USB
The realization of base four-in-one interface provides support.
As shown in Figure 1, in the utility model one embodiment, when Power Management Unit PMU 11 detects no VBUS
138 insertion and the first interruptive port INT1 131 be high level when, interface default output be universal asynchronous receiving-transmitting transmitter
UART, then the data that first switch 121 is connected to universal asynchronous receiving-transmitting transmitter UART are sent pin TX 125 by switch unit
On, second switch 122 is connected on the data receiver pin RX 128 of universal asynchronous receiving-transmitting transmitter UART, third is switched
123 are connected on the first interruptive port INT1 131, and grounding pin GND 105 is grounded；Or when Power Management Unit 11 detects
To when having the insertion of VBUS 138, it is inserted into if USB interface device or charger, then first switch 121 is connected to by switch unit
On negative data pin DM 126, second switch 122 is connected on correction data pin DP 127, third switch 123 is connected to
On first interruptive port INT1 131；If detecting, USB interface device or charger are extracted, and switch unit is by first switch
121 are connected on TX 125, and second switch 122 is connected on RX 128, and third switch 123 is connected on INT1 131.
In this embodiment, when Power Management Unit PMU 11 detects no insertion of VBUS 138, and the first interruption
Port INT1 131 is low level and when analog-digital converter ADC 132 detects that input voltage is 0V, power management list
First PMU 11 detects that OTG equipment is inserted into, and first switch 121 is connected on DM 126, second switch 122 is connected by switch unit
It is connected on DP 127, third switch 123 is connected on INT1 131；If Power Management Unit PMU 11 detects the first interruption
When port INT1 131 is high level, as OTG equipment is extracted, then first switch 121 is connected on TX 125, second switch
122 are connected on RX 128, and third switch 123 is connected on INT1 131；Or when Power Management Unit 11 detects do not have
VBUS 138 is inserted into, and the first interruptive port INT1 131 is low level and ADC 132 detects that input voltage is not 0V,
Then Power Management Unit PMU 11 detects that earphone is inserted into, and first switch 121 is connected to the R pin 124 of earphone by switch unit
On, second switch 122 is connected on the L pin 129 of earphone, third switch 123 is connected to earphone Mike MIC pin 130
On；If detecting, the second interruptive port INT2 137 is low level, is judged as that earphone is inserted into, if the second interruptive port INT2
137 be high level, then is judged as that earphone is extracted, then first switch 121 is connected on TX pin 125 by switch unit, by second
Switch 122 is connected on RX pin 128, and third switch 123 is connected on the first interruptive port INT1 131.
In this embodiment, when Power Management Unit PMU detects no VBUS insertion, and the first interruptive port INT1
For low level and ADC detects that input voltage is not 0V, if the second interruptive port INT2 is high level, judges to be inserted into non-
Method.
Specifically, as shown in Figure 1, the interface of micro USB female seat is defaulted as the interface of UART male connector, for example, inhomogeneity
The male connector insertion of type judges detection process are as follows:
The insertion detection of UART male connector: due to the interface circuit of the micro USB female seat, default output is UART, is opened at this time
S1 121 is closed, S2 122, S3 123 is default conditions, i.e., the DM pin 102 of the interface of micro USB female seat is opened by first
It closes S1 121 and is connected to TX pin 125, the DP pin 103 of the interface of base is connected to RX pin by second switch S2 122
128, the ID pin 104 of female seat interface is connected to the first interruptive port INT1 131 by third switch S3 123, and base connects
105 earthing potential of GND pin of mouth；
Generic USB male connector insertion detection: when Power Management Unit PMU 11, which is detected, has 5V voltage on VBUS 138, really
Think USB or charger insertion, then switch unit control first switch S1 121, the control pin of second switch S2 122,
So that the DM pin 102 of the interface of micro USB female seat is connected to DM pin 126 by first switch S1 121, base is connect
The DP pin 103 of mouth is connected to DP pin 127 by second switch S2 122, then starts the judgement process of USB and charger；
The insertion detection of OTG male connector: when the ID pin 104 of the interface of micro USB female seat connects OTG male connector, ID pin 104
0 level can be pulled down to by OTG male connector, third switch S3 123 is default conditions at this time, i.e. the first interruptive port INT1's 131
State can become low level from high level, if analog-digital converter ADC 132 detects that input voltage is 0V, system at this time
Be judged as OTG male connector be inserted into, then switch unit can by first switch S1 121, the control pin of second switch S2 122,
The DM pin 102 of the interface of micro USB female seat is connected to DM pin 126 by first switch S1 121, by connecing for base
The DP pin 103 of mouth is connected to DP pin 127, and the VBUS pipe of Power Management Unit PMU 11 by second switch S2 122
Foot 138 exports 5V power supply, is powered by the VBUS pin 101 of base to OTG male connector；
Earphone insertion detection: when the MIC pin 130 of the 104 lug machine of ID pin of the interface of micro USB female seat, because
There are DC impedances for earphone Mike MIC pin 130, generate partial pressure with the 3rd resistor 136 of the first interruptive port INT1131, make
The state for obtaining INT1 131 becomes low level from high level, and starting PMU 11 is carried out slotting by analog-digital converter ADC 132
Enter male connector type detection, if ADC 132 detects that input voltage is greater than 0V, is tentatively judged as that earphone is inserted into, switch unit meeting
Pass through first switch S1 121, the control pin of second switch S2 122, by the DM pin 102 of the interface of micro USB female seat
It is connected to the right channel R pin 124 of earphone by first switch S1 121, the DP pin 103 of the interface of base is passed through second
Switch S2 122 is connected to the L channel L pin 129 of earphone, and the ID pin 104 of the interface of base is passed through third switch S3
123 are connected to the earphone Mike MIC pin 130 of earphone, then proceed to the state for judging the second interruptive port INT2 137, if
INT2 137 is low level, then is confirmed as earphone insertion, is otherwise the insertion of illegal male connector.
As shown in Figure 1, different types of male connector extraction judges detection process are as follows:
UART male connector extracts detection: micro USB female seat interface circuit, and default output is UART, does not need detection and extracts；
USB male joint extracts detection: after system detection to USB male joint insertion, if PMU detects micro USB female seat
Voltage on VBUS pin 101 is 0V, after the stabilization time, it is believed that USB male joint is extracted, and passes through switch unit control first
First switch S1 121 is connected to TX pin 125, by second switch by the control foot of switch S1 121, second switch S2 122
S2 is connected to RX pin 128；
OTG male connector extracts detection: after system detection to OTG male connector insertion, if PMU 11 detects the first interruptive port
The state of INT1 131 becomes high level from low level, then system judges that OTG male connector is extracted, and PMU 11 stops to VBUS
138 pins export the power supply of 5V, and first switch S1 121 is connected to TX pin 125, second switch S2 122 is connected to RX
Pin 128；
Headset detection: after system detection to earphone insertion, if PMU 11 detects the second interruptive port INT2's 137
State becomes high level from low level, then it is assumed that earphone is extracted, and by the connection TX of first switch S1 121 pin 125, by second
The connection RX of switch S2 122 pin 128, by the first interruptive port INT1 131 of the connection male connector of third switch S3 123.
Based on the embodiments of the present invention, pass through 5 pins on the interface of micro USB female seat and switch unit
It is electrically connected, and mating connection and and the power management of R, TX, DM, DP, RX, L and MIC pin being connected with same male connector
Module PMU cooperation may be implemented through a micro USB interface, the integrated interface that can be compatible with the access of 4 kinds of male connectors,
Remove the extra interface of appearance, greatly simplifies the structure design of the products such as electronic equipment, improve waterproof, the security performances such as dust-proof.
The second aspect of the utility model embodiment is to provide a kind of electronic equipment, comprising: electronic equipment itself with it is upper
State the circuit based on general-purpose serial bus USB interface of embodiment.
Based on the embodiments of the present invention, the electronic equipment of the utility model can be mobile phone or tablet computer, this reality
It is not particularly limited with the novel type to electronic equipment.
The embodiments of the present invention, based on micro USB common in electronic equipment, by earphone interface, UART interface
It is integrated on a micro USB interface with OTG interface etc., simplifies the structure and design of electronic equipment, and improve electronics
Dust-proof, the reliabilities such as waterproof of equipment, and then promote user experience.
Specifically, the circuit based on general-purpose serial bus USB interface has 5 to draw on the interface of micro USB female seat
Foot, is power pins VBUS, negative data pin DM, correction data pin DP respectively, and integrated driving Integrated Drive ID draws
Foot, grounding pin GND.When the male connector of UART accesses the interface of the micro USB female seat, switch unit is female by micro USB
The DM pin of the interface of seat is connected to TX pin by first switch S1, and the DP pin of base is connected to by second switch S2
The ID pin of base is connected on the first interruptive port INT1 by third switch S3, the GND pin of base is connect by RX pin
Ground；
In addition, when the male connector of common USB accesses the interface of the micro USB female seat, switch unit is by micro USB
The DM pin of the interface of base is connected to DM pin by first switch S1, and the DP pin of base is connected by second switch S2
To DP pin, the ID pin of base is connected on the first interruptive port INT1 by third switch S3；And when the male connector of OTG connects
When entering the interface of the micro USB female seat, the DM pin of the interface of micro USB female seat is passed through first switch S1 by switch unit
It is connected to DM pin, the DP pin of base is connected to DP pin by second switch S2, the ID pin of base is passed through into third
Switch S3 is connected on the first interruptive port INT1；And when the male connector of common headphones is inserted into the interface of the micro USB female seat,
The DM pin of the interface of micro USB female seat is connected to R pin by first switch S1 by switch unit, by the DP pin of base
It is connected to L pin by second switch S2, the ID pin of base is connected to MIC pin by third switch S3.
Specifically, the interface of micro USB female seat is defaulted as the interface of UART male connector, for example, different types of male connector is inserted
Enter to judge detection process are as follows:
The insertion detection of UART male connector: due to the interface circuit of the micro USB female seat, default output is UART, is opened at this time
S1 121 is closed, S2 122, S3 123 is default conditions, i.e., the DM pin 102 of the interface of micro USB female seat is opened by first
It closes S1 121 and is connected to TX pin 125, the DP pin 103 of the interface of base is connected to RX pin by second switch S2 122
128, the ID pin 104 of female seat interface is connected to the first interruptive port INT1 131 by third switch S3 123, and base connects
105 earthing potential of GND pin of mouth；
Generic USB male connector insertion detection: when Power Management Unit PMU 11, which is detected, has 5V voltage on VBUS 138, really
Think USB or charger insertion, then switch unit control first switch S1 121, the control pin of second switch S2 122,
So that the DM pin 102 of the interface of micro USB female seat is connected to DM pin 126 by first switch S1 121, base is connect
The DP pin 103 of mouth is connected to DP pin 127 by second switch S2 122, then starts the judgement process of USB and charger；
The insertion detection of OTG male connector: when the ID pin 104 of the interface of micro USB female seat connects OTG male connector, ID pin 104
0 level can be pulled down to by OTG male connector, third switch S3 123 is default conditions at this time, i.e. the first interruptive port INT1's 131
State can become low level from high level, if analog-digital converter ADC 132 detects that input voltage is 0V, system at this time
Be judged as OTG male connector be inserted into, then switch unit can by first switch S1 121, the control pin of second switch S2 122,
The DM pin 102 of the interface of micro USB female seat is connected to DM pin 126 by first switch S1 121, by connecing for base
The DP pin 103 of mouth is connected to DP pin 127, and the VBUS pipe of Power Management Unit PMU 11 by second switch S2 122
Foot 138 exports 5V power supply, is powered by the VBUS pin 101 of base to OTG male connector；
Earphone insertion detection: when the MIC pin 130 of the 104 lug machine of ID pin of the interface of micro USB female seat, because
There are DC impedances for earphone Mike MIC pin 130, generate partial pressure with the 3rd resistor 136 of the first interruptive port INT1 131, make
The state for obtaining INT1 131 becomes low level from high level, and starting PMU 11 is carried out slotting by analog-digital converter ADC 132
Enter male connector type detection, if ADC132 detects that input voltage is greater than 0V, is tentatively judged as that earphone is inserted into, switch unit can lead to
First switch S1 121 is crossed, the control pin of second switch S2 122 leads to the DM pin 102 of the interface of micro USB female seat
The right channel R pin 124 that first switch S1 121 is connected to earphone is crossed, the DP pin 103 of the interface of base is opened by second
The L channel L pin 129 that S2 122 is connected to earphone is closed, the ID pin 104 of the interface of base is passed through into third switch S3 123
It is connected to the earphone Mike MIC pin 130 of earphone, the state for judging the second interruptive port INT2 137 is then proceeded to, if INT2
137 be low level, then is confirmed as earphone insertion, is otherwise the insertion of illegal male connector.
Different types of male connector extraction judges detection process are as follows:
UART male connector extracts detection: micro USB female seat interface circuit, and default output is UART, does not need detection and extracts；
USB male joint extracts detection: after system detection to USB male joint insertion, if PMU detects micro USB female seat
Voltage on VBUS pin 101 is 0V, after the stabilization time, it is believed that USB male joint is extracted, and passes through switch unit control first
First switch S1 121 is connected to TX pin 125, by second switch by the control foot of switch S1 121, second switch S2 122
S2 is connected to RX pin 128；
OTG male connector extracts detection: after system detection to OTG male connector insertion, if PMU 11 detects the first interruptive port
The state of INT1 131 becomes high level from low level, then system judges that OTG male connector is extracted, and PMU 11 stops to VBUS
138 pins export the power supply of 5V, and first switch S1 121 is connected to TX pin 125, second switch S2 122 is connected to RX
Pin 128；
Headset detection: after system detection to earphone insertion, if PMU 11 detects the second interruptive port INT2's 137
State becomes high level from low level, then it is assumed that earphone is extracted, and by first switch S1121 connection TX pin 125, second is opened
The connection RX of S2 122 pin 128 is closed, by the first interruptive port INT1 131 of the connection male connector of third switch S3 123.
More than, only specific embodiment of the present utility model, but protection scope of the utility model is not limited thereto,
Anyone skilled in the art within the technical scope disclosed by the utility model, can readily occur in variation or replace
It changes, should be covered within the scope of the utility model.Therefore, the protection scope of the utility model should be with claim
Subject to protection scope.
Claims (10)
1. a kind of circuit based on general-purpose serial bus USB interface characterized by comprising
Usb interface unit, including multiple pins, for connecting a variety of peripheral apparatus；
Power Management Unit PMU, and the usb interface unit data connection, for managing and detecting inserting for the peripheral apparatus
It pulls out；
At least one switch unit is electrically connected at least one pin in the multiple pin respectively, wherein it is described at least
Each switch unit in one switch unit includes at least one switch, wherein at least one described switch respectively with it is described more
The corresponding circuit of at least one of kind peripheral apparatus peripheral apparatus is electrically connected, and at least one peripheral apparatus includes general
Asynchronous receiving-transmitting transmitter UART,
Wherein, the Power Management Unit is set at least one peripheral apparatus plug according at least one peripheral hardware
At least one is switched described in standby Type Control, the corresponding pin of the switch unit is connected to outer at least one
If the corresponding circuit of equipment.
2. circuit according to claim 1, which is characterized in that each switch unit at least one described switch unit
Including a single-pole three-throw switch or three single-pole single-throw switch (SPST)s or a single-pole double-throw switch (SPDT) or two single-pole single-throw(SPSTs
Switch.
3. circuit according to claim 1 or 2, which is characterized in that at least one described switch includes first switch, second
Switch and third switch, the usb interface unit include 5 pins.
4. circuit according to claim 3, which is characterized in that 5 pins include:
Power pins VBUS is electrically connected the usb interface unit and the Power Management Unit PMU；
Grounding pin GND is electrically connected ground potential；
Data signal pin pair, the data signal pin is to including correction data pin DP and negative data pin DM, the data
Signal pins are to two switch units being respectively and electrically connected at least one described switch unit；
Integrated driving Integrated Drive ID pin, one be electrically connected at least one described switch unit open
Close unit.
5. circuit according to claim 4, which is characterized in that a variety of peripheral apparatus include USB interface-based set
It is standby, at least one peripheral apparatus further include: earphone and in the case where no host realizes the data transmission of equipment room
At least one of OTG equipment.
6. circuit according to claim 5, which is characterized in that further include first resistor, second resistance and 3rd resistor, institute
State resistance connection right channel R pin and reference voltage, the second resistance connects the right channel R pin and the PMU
Second interruptive port INT2, the first interruptive port INT1 of 3rd resistor the connection reference voltage and the PMU, wherein
The resistance value of the first resistor is 470k ohm；
The resistance value of the second resistance is 47k ohm；
The resistance value of the 3rd resistor is 5k ohm；
The default conditions of the first interruptive port INT1 are high level；
The default conditions of the second interruptive port INT2 are high level.
7. circuit according to claim 6, which is characterized in that
When the Power Management Unit PMU detects no VBUS insertion and the first interruptive port INT1 for high electricity
Usually, the interface default output is universal asynchronous receiving-transmitting transmitter UART, then the switch unit connects the first switch
The data for being connected to the universal asynchronous receiving-transmitting transmitter UART are sent on pin TX, the second switch are connected to universal asynchronous
On the data receiver pin RX of receiving-transmitting transmitter UART, third switch is connected on the first interruptive port INT1,
The grounding pin GND is grounded；Or
When the Power Management Unit has detected VBUS insertion, it is inserted into if USB interface device or charger, then institute
It states switch unit the first switch is connected on negative data pin DM, the second switch is connected to correction data pin DP
On, third switch is connected on the first interruptive port INT1；If detecting, USB interface device or charger are extracted,
The first switch is connected on the TX by the switch unit, and the second switch is connected on the RX, will be described
Third switch is connected on the INT1.
8. circuit according to claim 6, which is characterized in that
When the Power Management Unit PMU detects no VBUS insertion, and the first interruptive port INT1 is low
When level and analog-digital converter ADC detect that input voltage is 0V, the Power Management Unit PMU detects that OTG is set
The first switch is connected on the DM, the second switch is connected on the DP by standby insertion, the switch unit,
Third switch is connected on the INT1；If the Power Management Unit PMU detects first interruptive port
When INT1 is high level, as OTG equipment is extracted, then the first switch is connected on pin TX, the second switch connection
Onto pin RX, the third switch is connected on the INT1；Or
When the Power Management Unit detects no VBUS insertion, and the first interruptive port INT1 is low level
And ADC detects that input voltage is not 0V, then the Power Management Unit PMU detects that earphone is inserted into, the switch unit
The first switch is connected on the R pin of earphone, the second switch is connected on the L pin of earphone, by institute
Third switch is stated to be connected on earphone Mike's MIC pin；If detecting, the second interruptive port INT2 is low level, is judged
It is judged as that the earphone is extracted, then the switch unit if the second interruptive port INT2 is high level for earphone insertion
The first switch is connected on the TX, the second switch is connected on the RX, the third is switched and is connected
Onto the first interruptive port INT1.
9. circuit according to claim 8, which is characterized in that
When the Power Management Unit PMU detects no VBUS insertion, and the first interruptive port INT1 is low
Level and the ADC detect that input voltage is not 0V, if the second interruptive port INT2 is high level, judge to be inserted into
Illegally.
10. a kind of electronic equipment, the circuit including USB interface according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821047889.9U CN208737453U (en) | 2018-07-03 | 2018-07-03 | Circuit and electronic equipment based on general-purpose serial bus USB interface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821047889.9U CN208737453U (en) | 2018-07-03 | 2018-07-03 | Circuit and electronic equipment based on general-purpose serial bus USB interface |
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| Publication Number | Publication Date |
|---|---|
| CN208737453U true CN208737453U (en) | 2019-04-12 |
Family
ID=66024931
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821047889.9U Expired - Fee Related CN208737453U (en) | 2018-07-03 | 2018-07-03 | Circuit and electronic equipment based on general-purpose serial bus USB interface |
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| Country | Link |
|---|---|
| CN (1) | CN208737453U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110247265A (en) * | 2019-06-28 | 2019-09-17 | 上海创功通讯技术有限公司 | Multifunctional data line, switching circuit and switching method |
-
2018
- 2018-07-03 CN CN201821047889.9U patent/CN208737453U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110247265A (en) * | 2019-06-28 | 2019-09-17 | 上海创功通讯技术有限公司 | Multifunctional data line, switching circuit and switching method |
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