CN108874704A - Usb circuit and electronic equipment - Google Patents
Usb circuit and electronic equipment Download PDFInfo
- Publication number
- CN108874704A CN108874704A CN201710333520.8A CN201710333520A CN108874704A CN 108874704 A CN108874704 A CN 108874704A CN 201710333520 A CN201710333520 A CN 201710333520A CN 108874704 A CN108874704 A CN 108874704A
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- CN
- China
- Prior art keywords
- pin
- usb type
- usb
- connect
- plug
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/382—Information transfer, e.g. on bus using universal interface adapter
- G06F13/385—Information transfer, e.g. on bus using universal interface adapter for adaptation of a particular data processing system to different peripheral devices
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/40—Bus structure
- G06F13/4063—Device-to-bus coupling
- G06F13/4068—Electrical coupling
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2213/00—Indexing scheme relating to interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F2213/0042—Universal serial bus [USB]
Abstract
The present invention provides a kind of usb circuit, including：USB Type-C plug and speech chip, wherein the CC pin of the USB Type-C plug is connect with the enable end of the speech chip, while being grounded by first resistor；Four V of the USB Type-C plugBUSWherein one or more in pin are connect with the power end of the speech chip；The D+ pin of the USB Type-C plug is connect with the positive signal input terminal of the speech chip；The D- pin of the USB Type-C plug is connect with the negative signal input terminal of the speech chip；The V of the USB Type-C plugCONNPin is grounded by pull down resistor.The present invention can carry out making can control using external equipment of the CC pin on USB Type-C plug to insertion, and design is simple.
Description
Technical field
The present invention relates to electronic technology field more particularly to a kind of usb circuits and electronic equipment.
Background technique
USB full name Universal Serial Bus (universal serial bus), have multiple interfaces type, as A type, Type B,
Mini type etc., every kind of interface are all divided into two parts of socket and plug.USB Type-C interface is a newest for USB3.0
The interface of definition, a total of 24 pins, maximum feature is two-sided inserting, and there is no anti-inserted problems.
The specific pin of the front view of the socket end and plug end of USB Type-C interface defines respectively such as Fig. 1 a, 1b institute
Show.Provide there is current source or voltage source output on socket end CC1/CC2 pin according to Type-C agreement, for be inserted into identification and
Positive anti-plug identification.
When the external equipment insertion with USB Type-C plug has the electronic equipment of USB Type-C socket, electronics
Equipment is that enabling for external equipment is controlled by software mostly, and design is got up more complicated.
Summary of the invention
In view of this, the present invention provides a kind of usb circuit and electronic equipment, design can be simplified, set convenient for outside
Standby makes can control.
In a first aspect, the present invention provides a kind of usb circuit, it is suitable for USB Type-C interface plug end, including：
USB Type-C plug and speech chip, wherein
The CC pin of the USB Type-C plug is connect with the enable end of the speech chip, while passing through first resistor
Ground connection；
Four V of the USB Type-C plugBUSThe power supply of wherein one or more in pin with the speech chip
End connection；
The D+ pin of the USB Type-C plug is connect with the positive signal input terminal of the speech chip；
The D- pin of the USB Type-C plug is connect with the negative signal input terminal of the speech chip；
The V of the USB Type-C plugCONNPin is grounded by pull down resistor.
Optionally, the resistance value of the first resistor is 1 megaohm.
Second aspect, the present invention provide a kind of usb circuit, are suitable for USB Type-C interface socket end, including：
USB Type-C socket and power management chip, four V of the USB Type-C socketBUSPin and the power management core
The voltage output end of piece connects；
The power management chip includes detection control unit, the first current unit and the second current unit, the detection
First output end of control unit is connect with the control terminal of first current unit, the second output of the detection control unit
End is connect with the control terminal of second current unit；
The output end of first current unit is connect with the CC1 pin of the USB Type-C socket；
The output end of second current unit is connect with the CC2 pin of the USB Type-C socket.
Optionally, first current unit includes the first reference current source and first switch, first reference current
The output end in source is connect through the first switch with the CC1 pin of the USB Type-C socket, the control of the first switch
End is connect with the first output end of the detection control unit.
Optionally, the output electric current of first current source is 80 microamperes.
Optionally, second current unit includes the second reference current source and second switch, second reference current
The output end in source is connect through the second switch with the CC2 pin of the USB Type-C socket, the control of the second switch
End is connect with the second output terminal of the detection control unit.
Optionally, the output electric current of second current source is 80 microamperes.
The third aspect, the present invention provide a kind of electronic equipment, including above-mentioned suitable for USB Type-C interface plug end
Usb circuit.
Fourth aspect, the present invention provide a kind of electronic equipment, including above-mentioned suitable for USB Type-C interface socket end
Usb circuit.
Usb circuit and electronic equipment provided by the invention pass through the CC pin at USB Type-C interface plug end
Increase a pull down resistor, when there is the external equipment insertion with USB Type-C plug the electronics of USB Type-C socket to set
When standby, it can use CC pin and the external equipment of insertion carried out making can control, compared with prior art, design is simple, reliably
Property it is high.
Detailed description of the invention
Fig. 1 a is that the pin of USB Type-C socket front view defines schematic diagram；
Fig. 1 b is that the pin of USB Type-C plug front view defines schematic diagram；
Fig. 2 is the usb circuit schematic diagram at the USB Type-C interface plug end that one embodiment of the invention provides；
Fig. 3 be another embodiment of the present invention provides USB Type-C interface socket end usb circuit schematic diagram；
Fig. 4 is the usb circuit schematic diagram at the USB Type-C interface socket end that further embodiment of this invention provides.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only
It is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill
Personnel's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
The embodiment of the present invention provides a kind of usb circuit, is suitable for USB Type-C interface plug end, as shown in Fig. 2,
Including：USB Type-C plug 21 and speech chip 22, wherein
The CC pin of the USB Type-C plug 21 is connect with the enable end En of the speech chip 22, while passing through the
One resistance R1 ground connection；
Four V of the USB Type-C plug 21BUSWherein one or more in pin and the speech chip 22
Power end VDD connection has only drawn one of V in figureBUSThe case where pin A9 is connect with VDD；
The D+ pin of the USB Type-C plug 21 is connect with the positive signal input terminal DP of the speech chip 22；
The D- pin of the USB Type-C plug 21 is connect with the negative signal input terminal DM of the speech chip 22；
The V of the USB Type-C plug 21CONNPin is grounded by pull down resistor Rd, Rd=5.1k.
Optionally, the resistance value of the first resistor R1 is 1 megaohm.
According to USB Type-C agreement, only one CC pin of USB Type-C plug, in addition there are one VCONNPin,
For powering for the chip in cable, DP, DM are two differential signal lines of USB device, also referred to as D+, D-.
The embodiment of the present invention also provides a kind of usb circuit, is suitable for USB Type-C interface socket end, such as Fig. 3 institute
Show, including：USB Type-C socket 31 and power management chip 32, four V of the USB Type-C socket 31BUSPin with
The voltage output end V of the power management chip 32BUSConnection；
The power management chip 32 includes detection control unit 321, the first current unit 322 and the second current unit
323, the first output end of the detection control unit 321 is connect with the control terminal of first current unit 322, the detection
The second output terminal of control unit 321 is connect with the control terminal of second current unit 323；
The output end of first current unit 322 is connect with the CC1 pin of the USB Type-C socket 31；
The output end of second current unit 323 is connect with the CC2 pin of the USB Type-C socket 31.
According to USB Type-C agreement, VBUSIt is the power supply line that main equipment is powered to USB device, i.e., usual USB device+
5V；CC1, CC2 are two channel configuration (Channel Configuration) signal pins, are used for capability negotiation, CC1 and CC2
Effect have detection USB connection, detect positive anti-plug, data and V between USB deviceBUSConnection establish with management etc..
Optionally, as shown in figure 4, first current unit 322 includes the first reference current source Ip1 and first switch
CC1 of the output end of SW1, the first reference current source Ip1 through the first switch SW1 Yu the USB Type-C socket 31
Pin connection, the control terminal of the first switch SW1 are connect with the first output end of the detection control unit 321.
Similarly, as shown in figure 4, second current unit 323 includes the second reference current source Ip2 and second switch
CC2 of the output end of SW2, the second reference current source Ip2 through the second switch SW2 Yu the USB Type-C socket 31
Pin connection, the control terminal of the second switch SW2 are connect with the second output terminal of the detection control unit 321.
In general, the output current design of the first current source Ip1 and the second current source Ip2 are at 80 microamperes.
The embodiment of the present invention also provides a kind of electronic equipment, including above-mentioned suitable for USB Type-C interface plug end
Usb circuit, such as Type-C interface digital earphone or digital-to-analog bifunctional earphone set.
The embodiment of the present invention also provides a kind of electronic equipment, including above-mentioned suitable for USB Type-C interface socket end
Usb circuit, such as mobile phone.
By taking Type-C interface digital earphone is inserted into mobile phone as an example, after mobile phone power-on enters operating mode, first switch SW1
And second switch SW2 default is closure, CC1 pin and CC2 pin have level output at this time, and default is high level, due to
It is not connected with earphone, V at this timeBUSPin is no output.
After earphone is inserted into mobile phone, CC1 pin or CC2 pin can detect pull down resistor Rd, due to Rd=5.1k, and institute
The output electric current for stating the first current source Ip1 and the second current source Ip2 is 80uA, can calculate voltage and there was only 0.4V, small
In 1.2V, illustrate that earphone has been gone up in connection, mobile phone can export V at this timeBUS.And which CC pin (CC1 or CC2) detects drop-down electricity
Hinder Rd, so that it may which the direction for determining interface insertion switches RX/TX in passing.
Due to the presence of first resistor R1, the enable end En of speech chip 22 is high level at this time, so speech chip 22
It is enabled, operating mode can be entered.
Since USB Type-C agreement defines only the situation that CC pin voltage is less than 2.75V, for the electricity on CC pin
Situation of the pressure greater than 2.75V does not have its function of specific definition, therefore the embodiment of the present invention will not influence existing type-C interface
Insertion detection and positive/negative slotting detection.
When mobile phone is in standby or battery saving mode, first switch that detection control unit 321 will be connect with CC pin
SW1 or second switch SW2 is disconnected, and due to the presence of first resistor R1, the enable end En of speech chip 22 becomes low level at this time,
So speech chip 22 can enter battery saving mode or closing, when mobile phone is needed using earphone, detection control unit 321 again will
First switch SW1 or second switch the SW2 closure connecting with CC pin, the enable end En of speech chip 22 becomes again at this time
High level, speech chip 22 are again enabled.
It can thus be seen that a first resistor R1 is increased by the CC pin at USB Type-C interface plug end, from
And mobile phone can use CC pin and carry out making can control to the earphone of insertion, compared with prior art, design is simple, reliability
It is high.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by those familiar with the art, all answers
It is included within the scope of the present invention.Therefore, protection scope of the present invention should be subject to the protection scope in claims.
Claims (9)
1. a kind of usb circuit is suitable for USB Type-C interface plug end, which is characterized in that including：USB Type-C is inserted
Head and speech chip, wherein
The CC pin of the USB Type-C plug is connect with the enable end of the speech chip, while being connect by first resistor
Ground；
Four V of the USB Type-C plugBUSThe power end of wherein one or more and the speech chip in pin connects
It connects；
The D+ pin of the USB Type-C plug is connect with the positive signal input terminal of the speech chip；
The D- pin of the USB Type-C plug is connect with the negative signal input terminal of the speech chip；
The V of the USB Type-C plugCONNPin is grounded by pull down resistor.
2. usb circuit according to claim 1, which is characterized in that the resistance value of the first resistor is 1 megaohm.
3. a kind of usb circuit is suitable for USB Type-C interface socket end, which is characterized in that including：USB Type-C is inserted
Seat and power management chip, four V of the USB Type-C socketBUSThe voltage output of pin and the power management chip
End connection；
The power management chip includes detection control unit, the first current unit and the second current unit, the detection control
First output end of unit is connect with the control terminal of first current unit, the second output terminal of the detection control unit with
The control terminal of second current unit connects；
The output end of first current unit is connect with the CC1 pin of the USB Type-C socket；
The output end of second current unit is connect with the CC2 pin of the USB Type-C socket.
4. usb circuit according to claim 3, which is characterized in that first current unit includes the first benchmark
Current source and first switch, the output end of first reference current source is through the first switch and the USB Type-C socket
The connection of CC1 pin, the control terminal of the first switch connect with the first output end of the detection control unit.
5. usb circuit according to claim 4, which is characterized in that the output electric current of first current source is 80
Microampere.
6. usb circuit according to claim 3, which is characterized in that second current unit includes the second benchmark
Current source and second switch, the output end of second reference current source is through the second switch and the USB Type-C socket
The connection of CC2 pin, the control terminal of the second switch connect with the second output terminal of the detection control unit.
7. usb circuit according to claim 6, which is characterized in that the output electric current of second current source is 80
Microampere.
8. a kind of electronic equipment, which is characterized in that including usb circuit as claimed in claim 1 or 2.
9. a kind of electronic equipment, which is characterized in that including the usb circuit as described in any one of claim 3 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710333520.8A CN108874704B (en) | 2017-05-12 | 2017-05-12 | USB interface circuit and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710333520.8A CN108874704B (en) | 2017-05-12 | 2017-05-12 | USB interface circuit and electronic equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108874704A true CN108874704A (en) | 2018-11-23 |
| CN108874704B CN108874704B (en) | 2019-12-13 |
Family
ID=64319615
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710333520.8A Active CN108874704B (en) | 2017-05-12 | 2017-05-12 | USB interface circuit and electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108874704B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105120404A (en) * | 2015-07-31 | 2015-12-02 | 华为技术有限公司 | Audio equipment, terminal equipment and electronic equipment |
| US20160308527A1 (en) * | 2015-04-17 | 2016-10-20 | Samsung Electronics Co., Ltd. | Integrated circuit and cable assembly including the same |
| CN205692122U (en) * | 2016-05-17 | 2016-11-16 | 深圳慧能泰半导体科技有限公司 | A kind of USB Type C interface circuit and control device thereof |
| CN206024047U (en) * | 2016-08-11 | 2017-03-15 | 歌尔股份有限公司 | A kind of earphone |
| CN206162503U (en) * | 2016-08-11 | 2017-05-10 | 深圳慧能泰半导体科技有限公司 | USBType C interface circuit |
-
2017
- 2017-05-12 CN CN201710333520.8A patent/CN108874704B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160308527A1 (en) * | 2015-04-17 | 2016-10-20 | Samsung Electronics Co., Ltd. | Integrated circuit and cable assembly including the same |
| CN105120404A (en) * | 2015-07-31 | 2015-12-02 | 华为技术有限公司 | Audio equipment, terminal equipment and electronic equipment |
| CN205692122U (en) * | 2016-05-17 | 2016-11-16 | 深圳慧能泰半导体科技有限公司 | A kind of USB Type C interface circuit and control device thereof |
| CN206024047U (en) * | 2016-08-11 | 2017-03-15 | 歌尔股份有限公司 | A kind of earphone |
| CN206162503U (en) * | 2016-08-11 | 2017-05-10 | 深圳慧能泰半导体科技有限公司 | USBType C interface circuit |
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| Publication number | Publication date |
|---|---|
| CN108874704B (en) | 2019-12-13 |
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