CN205959199U - OTGUSB selection circuit - Google Patents
OTGUSB selection circuit Download PDFInfo
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- CN205959199U CN205959199U CN201620793294.2U CN201620793294U CN205959199U CN 205959199 U CN205959199 U CN 205959199U CN 201620793294 U CN201620793294 U CN 201620793294U CN 205959199 U CN205959199 U CN 205959199U
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Abstract
The utility model discloses a OTGUSB selection circuit, the circuit includes: the USB port includes: a pair of differential signal pin, analog switch includes: a pair of differential signal pin, two couples of output pin, model selection pin, power pin, power supply circuit includes: MOSFET pipe and boost power core piece, dial switch, wherein, the USB port is connected with analog switch, analog switch's power pin and power supply circuit are connected, the model selection pin passes through dial switch and ground connection, the model selection pin is connected with power supply circuit, model selection pin and MOSFET union coupling, the boost power core piece is controlled to the MOSFET union coupling. The utility model discloses an adopt 2: 1 analog switch and a dial switch carry out power output and select the functional localization with decision USB, can reduce the complexity of circuit, realize simultaneously having realized USB device and USB host function at same USB port, need not CPU and support the OTG function.
Description
Technical field
This utility model is related to a kind of OTG USB selection circuit, belongs to electric field.
Background technology
In modern industry site of deployment, often to be downloaded to control device from PC end by a USB port, simultaneously
By USB port, data is exported to USB flash disk from control device or imports program from USB flash disk and upgraded to control device.Have
Control device is limited by space, can only adopt a USB port, and single-chip microcomputer can not support USB OTG function, this is just
Need USB port by on-off circuit, USB host and USB device to be switched over, realize USB port and can do simultaneously
Device can be host again.And in the case that CPU does not support OTG, need to realize to be Device again with a USB port
The function of Host can be done.
Utility model content
In order to solve the above problems, this utility model passes through to provide a kind of OTG USB selection circuit.
The technical solution adopted in the utility model is a kind of OTG USB selection circuit it is characterised in that described circuit bag
Include：USB port, including：A pair of differential signal pin；Analog switch, including：A pair of differential signal pin, two pairs of output pins,
Mode selection pin, power pins；Power circuit, including：MOSFET pipe and Boost power supply chip；Toggle switch；Wherein, USB
Port is connected with analog switch, and the power pins of described analog switch are connected with power circuit, and described mode selection pin passes through
Toggle switch is connected with ground wire, and described mode selection pin is connected with power circuit, and described mode selection pin is managed with MOSFET
Connect, described MOSFET pipe connects and controls Boost power supply chip.
Preferably, described analog switch is SGM7227 high speed SUB switching switch.
Preferably, described Boost power supply chip is SGM6605 power supply chip.
Preferably, power pins are connected with power circuit by pull-up resistor R1.
The beneficial effects of the utility model are by adopting 2：1 analog switch and a toggle switch, carry out power supply output
Select to determine the functional localization of USB, it is possible to reduce the complexity of circuit, realize achieving in same USB port simultaneously
USB device and USB host function, support OTG function without CPU, compared with similar products, have circuit simply, performance
Reliable, the advantages of with low cost.
Brief description
Fig. 1 show a kind of frame schematic diagram of the OTG USB selection circuit based on this utility model embodiment；
Fig. 2 show a kind of connection diagram of the OTG USB selection circuit based on this utility model embodiment.
Specific embodiment
With reference to embodiments this utility model is illustrated.
Based on the embodiment of utility model, a kind of OTG USB selection circuit as shown in Figure 1, 2, described circuit includes：USB
Port, including：A pair of differential signal pin；Analog switch, including：A pair of differential signal pin, two pairs of output pins, pattern is selected
Select pin（2）, power pins；Power circuit, including：MOSFET pipe and Boost power supply chip；Toggle switch（JP1）；Wherein,
USB port is connected with analog switch, and the power pins of described analog switch are connected with power circuit, and described mode selection pin leads to
Cross toggle switch to be connected with ground wire, described mode selection pin is connected with power circuit, described mode selection pin and MOSFET
Pipe（Q1）Connect, described MOSFET pipe connects and controls Boost power supply chip.
USB port has six pins：VS, DN, DP, GMD, VS connects 5V power supply, and DN, DP are differential signal pin, with mould
Differential signal pin D+, D- of intending switch connect, and pass through a 15K resistance eutral grounding between wherein DN and D+, between DP and D- also
By a 15K resistance eutral grounding, described analog switch has ten pins：D+、D-、S、VCC、HSD1+、HSD1-、HSD2+、
HSD2-, GND, OE, wherein S are mode selection pin, and HSD1+, HSD1-, HSD2+, HSD2- are output pin, are connected with CPU；
GND, OE pin is grounded, and S pin connects 3.3v power supply, and S pin is connected with ground wire by toggle switch simultaneously, described 3.3v power supply
It is connected with MOSFET pipe, described MOSFET pipe is connected with Boost power supply chip, determines USB mode by toggle switch, works as dial-up
When OFF got to by switch, S pin is high level, is USB device pattern, MOSFET pipe is not turned on, and power supply chip does not export electricity
Pressure, when toggle switch gets to ON, S pin is USB host pattern for low level, and MOSFET pipe turns on, power supply chip output electricity
Pressure, corresponding USB flash disk will work.
Described analog switch is SGM7227 high speed SUB switching switch.
Described Boost power supply chip is SGM6605 power supply chip.
Power pins are connected with power circuit by pull-up resistor R1.
The above, simply preferred embodiment of the present utility model, this utility model is not limited to above-mentioned enforcement
Mode, as long as it reaches technique effect of the present utility model with identical means, all should belong to protection domain of the present utility model.
In protection domain of the present utility model, its technical scheme and/or embodiment can have various different modifications and variations.
Claims (4)
1. a kind of OTG USB selection circuit is it is characterised in that described circuit includes：
USB port, including：A pair of differential signal pin；
Analog switch, including：A pair of differential signal pin, two pairs of output pins, mode selection pin, power pins；
Power circuit, including：MOSFET pipe and Boost power supply chip；
Toggle switch；Wherein,
USB port is connected with analog switch, and the power pins of described analog switch are connected with power circuit, and described model selection is drawn
Foot is connected with ground wire by toggle switch, and described mode selection pin is connected with power circuit, described mode selection pin with
MOSFET pipe connects, and described MOSFET pipe connects and controls Boost power supply chip.
2. a kind of OTG USB selection circuit according to claim 1 is it is characterised in that described analog switch is SGM7227
High speed SUB switching switch.
3. a kind of OTG USB selection circuit according to claim 1 is it is characterised in that described Boost power supply chip is
SGM6605 power supply chip.
4. a kind of OTG USB selection circuit according to claim 1 is it is characterised in that power pins pass through pull-up resistor
R1 is connected with power circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620793294.2U CN205959199U (en) | 2016-07-25 | 2016-07-25 | OTGUSB selection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620793294.2U CN205959199U (en) | 2016-07-25 | 2016-07-25 | OTGUSB selection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205959199U true CN205959199U (en) | 2017-02-15 |
Family
ID=57972361
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620793294.2U Active CN205959199U (en) | 2016-07-25 | 2016-07-25 | OTGUSB selection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205959199U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107145142A (en) * | 2017-05-26 | 2017-09-08 | 海信（山东）空调有限公司 | Test device and multi-connected machine test system |
-
2016
- 2016-07-25 CN CN201620793294.2U patent/CN205959199U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107145142A (en) * | 2017-05-26 | 2017-09-08 | 海信（山东）空调有限公司 | Test device and multi-connected machine test system |
| CN107145142B (en) * | 2017-05-26 | 2020-06-09 | 海信（山东）空调有限公司 | Testing device and multi-online testing system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |