CN104320115A - USB OTG module - Google Patents
USB OTG module Download PDFInfo
- Publication number
- CN104320115A CN104320115A CN201410617940.5A CN201410617940A CN104320115A CN 104320115 A CN104320115 A CN 104320115A CN 201410617940 A CN201410617940 A CN 201410617940A CN 104320115 A CN104320115 A CN 104320115A
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- CN
- China
- Prior art keywords
- usb otg
- circuit
- otg module
- end circuit
- short
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Abstract
The invention relates to a USB OTG module. The USB OTG module is provided with an ID foot position needing to keep in a short-circuit state, and the ID foot position is connected with a normally closed relay keeping the short-circuit state of the ID foot position. The normally closed relay is used for keeping the short-circuit state of the ID foot position of the USB OTG module, existence of signals is controlled by the outside easily to switch the state of the ID foot position to other resistance values of the ID foot position, and therefore the cost of the USB OTG module is reduced. In addition, the USB OTG module is easy to control in the use process and is small in limitation.
Description
Technical field
The present invention relates to a kind of for realizing the USB OTG module that usb signal connects.
Background technology
USB OTG module has an ID pin position, and defining ID pin position in USB OTG specification has following several state
– short circuit (being represented as the main frame that power supply is provided)
– open circuit (being represented as the device receiving power supply)
– 124Kohm（ACA RID-A）
– 68kohm（ACA RID-B）
– 36.5Kohm（ACA RID-C）
When designing the OTG module of convertible ID state, need switch to switch ID state, generally common difficulty is to switch to other states from short-circuit condition.
When main frame played the part of by Portable mobile device, this ID pin position needs to maintain short-circuit condition, and the power supply that existing USB OTG is typically employed in this ID pin position connection battery or other types maintains to allow transistor switch realize short-circuit condition, as shown in Figure 1, this just makes the increase of USB OTG module cost, and also can be restricted when using.
Summary of the invention
The object of this invention is to provide a kind ofly to reduce costs, USB OTG module easy to use.
For achieving the above object, the technical solution used in the present invention is:
A kind of USB OTG module, connect for realizing signal, it has the ID pin position that need maintain short-circuit condition, and described ID pin position is connected with the normally closed relay maintaining its short-circuit condition.
Preferably, described normally closed relay is solid-state relay or electromagnetic relay.
Preferably, the load end circuit that described normally closed relay has control end circuit, is coupled with described control deenergizing, described load circuit is connected with the ID pin position of described USB OTG module, and described load end circuit is short-circuit condition when the control signal of described control end circuit without input, has during the control signal of input present open-circuit condition at described control end circuit.
Preferably, described load end circuit is connected with outer meeting resistance.
Preferably, described control end circuit is coupled with described load end circuit by photoelectricity or electromagnetic coupled circuit.
Because technique scheme is used, the present invention compared with prior art has following advantages: the present invention adopts normally closed relay to maintain the short-circuit condition of the ID pin position of USB OTG module, and be easy to change the state of ID pin position to other resistance by the appearance of external control signal, thus the cost of USB OTG module can be reduced, and USB OTG module is in use easy to control, and limits less.
Accompanying drawing explanation
Accompanying drawing 1 is the schematic diagram of existing USB OTG module.
Accompanying drawing 2 is the schematic diagram of USB OTG module of the present invention.
Accompanying drawing 3 is the schematic diagram of the solid-state relay that USB OTG module of the present invention adopts.
Accompanying drawing 4 is the schematic diagram of the electromagnetic relay that USB OTG module of the present invention adopts.
Embodiment
Below in conjunction with embodiment shown in the drawings, the invention will be further described.
Embodiment one: a kind of USB OTG module, it is installed and connects for the usb signal realized between distinct device on different devices.Be described for the USB OTG module be arranged on portable apparatus, as shown in Figure 2, the connector of this USB OTG module has the ID pin position that need maintain short-circuit condition, and ID pin position is connected with the normally closed relay maintaining its short-circuit condition.As shown in accompanying drawing 3 and accompanying drawing 4, normally closed relay is solid-state relay or electromagnetic relay.Solid-state relay have control end circuit, with control load end circuit that deenergizing is coupled, realize photoelectric coupling circuit that control end circuit and load end circuit be coupled or electromagnetic coupled circuit, load circuit is connected with the ID pin position of USB OTG module, and load end circuit is connected with outer meeting resistance R3.When control end circuit is without the control signal VBUS_EXT inputted, load end circuit is short-circuit condition, and now ID pin position resistance is 0 Ω; When control end circuit has the control signal VBUS_EXT of input, load end circuit presents open-circuit condition, now ID pin position resistance depending on outer meeting resistance R3 resistance and configure.
This USB OTG module have employed normally closed relay to maintain the short-circuit condition of its ID pin position, without the need to external power supply, so cost lower, be easy to control, there is superiority.
Above-described embodiment, only for technical conceive of the present invention and feature are described, its object is to person skilled in the art can be understood content of the present invention and implement according to this, can not limit the scope of the invention with this.All equivalences done according to Spirit Essence of the present invention change or modify, and all should be encompassed within protection scope of the present invention.
Claims (5)
1. a USB OTG module, connect for realizing signal, it has the ID pin position that need maintain short-circuit condition, it is characterized in that: described ID pin position is connected with the normally closed relay maintaining its short-circuit condition.
2. a kind of USB OTG module according to claim 1, is characterized in that: described normally closed relay is solid-state relay or electromagnetic relay.
3. a kind of USB OTG module according to claim 2, it is characterized in that: the load end circuit that described normally closed relay has control end circuit, is coupled with described control deenergizing, described load circuit is connected with the ID pin position of described USB OTG module, and described load end circuit is short-circuit condition when the control signal of described control end circuit without input, has during the control signal of input present open-circuit condition at described control end circuit.
4. a kind of USB OTG module according to claim 3, is characterized in that: described load end circuit is connected with outer meeting resistance.
5. a kind of USB OTG module according to claim 3 or 4, is characterized in that: described control end circuit is coupled with described load end circuit by photoelectricity or electromagnetic coupled circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410617940.5A CN104320115A (en) | 2014-11-06 | 2014-11-06 | USB OTG module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410617940.5A CN104320115A (en) | 2014-11-06 | 2014-11-06 | USB OTG module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104320115A true CN104320115A (en) | 2015-01-28 |
Family
ID=52375312
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410617940.5A Pending CN104320115A (en) | 2014-11-06 | 2014-11-06 | USB OTG module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104320115A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080150512A1 (en) * | 2006-12-25 | 2008-06-26 | Nikon Corporation | Electronic device |
| CN101752760A (en) * | 2008-12-11 | 2010-06-23 | 富士康(昆山)电脑接插件有限公司 | Multiplex USB cable connector |
| WO2010108551A1 (en) * | 2009-03-27 | 2010-09-30 | Nokia Corporation | Power management |
| CN202153645U (en) * | 2011-06-28 | 2012-02-29 | 比亚迪股份有限公司 | Electric device based on OTG interface charging |
| CN103532117A (en) * | 2013-10-22 | 2014-01-22 | 小米科技有限责任公司 | USB electrostatic protection device and terminal equipment |
| CN204131484U (en) * | 2014-11-06 | 2015-01-28 | 贸联电子(昆山)有限公司 | A kind of USB OTG module |
-
2014
- 2014-11-06 CN CN201410617940.5A patent/CN104320115A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080150512A1 (en) * | 2006-12-25 | 2008-06-26 | Nikon Corporation | Electronic device |
| CN101752760A (en) * | 2008-12-11 | 2010-06-23 | 富士康(昆山)电脑接插件有限公司 | Multiplex USB cable connector |
| WO2010108551A1 (en) * | 2009-03-27 | 2010-09-30 | Nokia Corporation | Power management |
| CN202153645U (en) * | 2011-06-28 | 2012-02-29 | 比亚迪股份有限公司 | Electric device based on OTG interface charging |
| CN103532117A (en) * | 2013-10-22 | 2014-01-22 | 小米科技有限责任公司 | USB electrostatic protection device and terminal equipment |
| CN204131484U (en) * | 2014-11-06 | 2015-01-28 | 贸联电子(昆山)有限公司 | A kind of USB OTG module |
Non-Patent Citations (1)
| Title |
|---|
| 庄奕琪: "《电子设计可靠性工程》", 30 September 2014 * |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150128 |