CN206162902U - Point -reading machine's USB drive circuit - Google Patents
Point -reading machine's USB drive circuit Download PDFInfo
- Publication number
- CN206162902U CN206162902U CN201620722912.4U CN201620722912U CN206162902U CN 206162902 U CN206162902 U CN 206162902U CN 201620722912 U CN201620722912 U CN 201620722912U CN 206162902 U CN206162902 U CN 206162902U
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- Prior art keywords
- resistance
- usb interface
- terminals
- terminal
- usb
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Abstract
The utility model relates to a point -reading machine technical field discloses a point -reading machine's USB drive circuit, including USB interface, resistance R4, resistance R5, resistance R6, resistance R7, resistance R8, inductance L1 and singlechip, the VUSB terminal of USB interface with be connected with the VUSB terminal of singlechip through inductance L1, the DM terminal of USB interface passes through resistance R4 and is connected with the DM terminal of singlechip, the DP terminal resistance R5 and the DP terminal of singlechip of USB interface are connected, a GND terminal of USB interface passes through resistance R6 and is connected with the BM1 terminal of singlechip, the 2nd GND terminal ground connection of USB interface, the VUSB terminal of USB interface still loops through resistance R7, resistance R8 ground connection, the USB_DETECT terminal of singlechip is still connected between resistance R7 and resistance R8. The utility model discloses simple structure can effectual grafting USB to the reliability of circuit is high.
Description
Technical field
The utility model is related to point reader technical field, and more specifically, the USB of more particularly to a kind of point reader drives electricity
Road.
Background technology
Point reader is a new generation using newest optical image recognition technology and advanced numeral voice technological development
Intelligence is read and learning tool.It embodies being perfectly combined for electronic product and education sector, realizes science and technology people-oriented
Theory.Point reader can realize reading simultaneously, it is re-reading, with reading, recording and the various functions such as entertain.
Point reader is typically provided USB interface, and to provide point reader download function, and it is simple how to design circuit structure
USB drive circuits are necessary.
Utility model content
The purpose of this utility model is to provide a kind of USB drive circuits of the point reader of simple structure.
In order to achieve the above object, the technical solution adopted in the utility model is as follows：
A kind of USB drive circuits of point reader, including USB interface, resistance R4, resistance R5, resistance R6, resistance R7, resistance
R8, inductance L1 and single-chip microcomputer；The VUSB terminals of the USB interface be connected with the VUSB terminals of single-chip microcomputer by inductance L1, institute
The DM terminals for stating USB interface are connected by resistance R4 with the DM terminals of single-chip microcomputer, DP terminal resistances R5 of the USB interface and list
The DP terminals connection of piece machine, the first GND terminal of the USB interface is connected by resistance R6 with the BM1 terminals of single-chip microcomputer, described
The second GND terminal ground connection of USB interface, the VUSB terminals of the USB interface also pass sequentially through resistance R7, resistance R8 ground connection, institute
The USB_DETECT terminals for stating single-chip microcomputer are additionally attached between resistance R7 and resistance R8.
Further, also include the first Transient Suppression Diode E1 being connected with the VUSB terminals of USB interface, connect with USB
Second Transient Suppression Diode E2 of the DM terminals connection of mouth, the 3rd transient state being connected with the DP terminals of USB interface suppresses two poles
Pipe E3, and the 4th Transient Suppression Diode E4 being connected with the first GND terminal of USB interface.
Compared with prior art, the utility model has the advantage of：The utility model simple structure, can effectively grafting
USB, and the reliability of circuit is high.
Description of the drawings
In order to be illustrated more clearly that the utility model embodiment or technical scheme of the prior art, below will be to embodiment
Or the accompanying drawing to be used needed for description of the prior art is briefly described, it should be apparent that, drawings in the following description are only
It is some embodiments of the present utility model, for those of ordinary skill in the art, in the premise for not paying creative work
Under, can be with according to these other accompanying drawings of accompanying drawings acquisition.
Fig. 1 is the circuit diagram of head circuit in the utility model.
Fig. 2 be point reader described in the utility model USB drive circuits in single-chip microcomputer circuit diagram.
Specific embodiment
Preferred embodiment of the present utility model is described in detail below in conjunction with the accompanying drawings, so that advantage of the present utility model
Can be easier to be readily appreciated by one skilled in the art with feature, it is apparent clear and definite so as to make to protection domain of the present utility model
Define.
Refering to shown in Fig. 1, Fig. 2, the utility model provides a kind of USB drive circuits of point reader, including USB interface, electricity
Resistance R4, resistance R5, resistance R6, resistance R7, resistance R8, inductance L1 and single-chip microcomputer.
The VUSB terminals of the USB interface be connected with the VUSB terminals of single-chip microcomputer by inductance L1, the USB interface
DM terminals are connected by resistance R4 with the DM terminals of single-chip microcomputer, DP terminal resistances R5 of the USB interface and the DP ends of single-chip microcomputer
Son connection, the first GND terminal of the USB interface is connected by resistance R6 with the BM1 terminals of single-chip microcomputer, the USB interface
Second GND terminal is grounded, and the VUSB terminals of the USB interface also pass sequentially through resistance R7, resistance R8 ground connection, the single-chip microcomputer
USB_DETECT terminals are additionally attached between resistance R7 and resistance R8.
In order to realize overvoltage protection, the utility model also includes the first transient state suppression being connected with the VUSB terminals of USB interface
Diode E1 processed, the second Transient Suppression Diode E2 being connected with the DM terminals of USB interface, is connected with the DP terminals of USB interface
The 3rd Transient Suppression Diode E3, and the 4th Transient Suppression Diode E4 being connected with the first GND terminal of USB interface.
The utility model when in use, by the VUSB terminals of USB interface 5V voltages is provided, and inductance L1 can play filtering
Effect, when external device inserts USB interface, can realize that information is exchanged by USB_DETECT.
The utility model simple structure, can effective grafting USB, and the reliability of circuit is high.
Although being described in conjunction with the accompanying embodiment of the present utility model, patent owner can want in appended right
Various modifications or modification are made within the scope of asking, as long as less than the protection model described by claim of the present utility model
Enclose, all should be within protection domain of the present utility model.
Claims (2)
1. USB drive circuits of a kind of point reader, it is characterised in that：Including USB interface, resistance R4, resistance R5, resistance R6, electricity
Resistance R7, resistance R8, inductance L1 and single-chip microcomputer；The VUSB terminals of the USB interface and the VUSB ends by inductance L1 and single-chip microcomputer
Son connection, the DM terminals of the USB interface are connected by resistance R4 with the DM terminals of single-chip microcomputer, the DP terminals of the USB interface
Resistance R5 is connected with the DP terminals of single-chip microcomputer, and the first GND terminal of the USB interface is by resistance R6 and the BM1 ends of single-chip microcomputer
Son connection, the second GND terminal ground connection of the USB interface, the VUSB terminals of the USB interface also pass sequentially through resistance R7, electricity
Resistance R8 ground connection, the USB_DETECT terminals of the single-chip microcomputer are additionally attached between resistance R7 and resistance R8.
2. USB drive circuits of point reader according to claim 1, it is characterised in that：Also include the VUSB with USB interface
First Transient Suppression Diode E1, the second Transient Suppression Diode E2 being connected with the DM terminals of USB interface of terminal connection, with
3rd Transient Suppression Diode E3 of the DP terminals connection of USB interface, and the be connected with the first GND terminal of USB interface
Four Transient Suppression Diode E4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620722912.4U CN206162902U (en) | 2016-07-09 | 2016-07-09 | Point -reading machine's USB drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620722912.4U CN206162902U (en) | 2016-07-09 | 2016-07-09 | Point -reading machine's USB drive circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206162902U true CN206162902U (en) | 2017-05-10 |
Family
ID=58647335
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620722912.4U Expired - Fee Related CN206162902U (en) | 2016-07-09 | 2016-07-09 | Point -reading machine's USB drive circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206162902U (en) |
-
2016
- 2016-07-09 CN CN201620722912.4U patent/CN206162902U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170510 Termination date: 20210709 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |