CN202632551U - USB interface module of learning machine circuit - Google Patents
USB interface module of learning machine circuit Download PDFInfo
- Publication number
- CN202632551U CN202632551U CN 201220218376 CN201220218376U CN202632551U CN 202632551 U CN202632551 U CN 202632551U CN 201220218376 CN201220218376 CN 201220218376 CN 201220218376 U CN201220218376 U CN 201220218376U CN 202632551 U CN202632551 U CN 202632551U
- Authority
- CN
- China
- Prior art keywords
- usb interface
- pin
- interface chip
- learning machine
- usbd
- 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.)
- Expired - Fee Related
Links
Abstract
The utility model discloses a USB interface module of a learning machine circuit. The USB interface module comprises an electrostatic impedor, which is accessed between a USB interface chip and the ground to eliminate the electrostatic interference, and an RC circuit is further accessed to filter clutter signals for increasing data transmission speed. The USB interface module of the learning machine circuit can effectively reduce the interference of the clutter on the USB interface, and increases the USB data transmission speed.
Description
Technical field
The utility model relates to the learning machine circuit field, is specially the usb interface module in a kind of learning machine circuit.
Background technology
Learning machine is a kind of electronic instruction series products, is widely used in the student group at home.Learning machine generally is made up of main control module and other peripheral circuit thereof, like usb circuit etc.Prior art learning machine usb circuit is vulnerable to noise signal in use and disturbs, the slow problem of transmission speed when causing using USB interface transmission data.
The utility model content
The utility model purpose provides the usb interface module in a kind of learning machine circuit, to solve the slow problem of prior art learning machine USB interface transmission data speed.
In order to achieve the above object, the technical scheme that the utility model adopted is:
Usb interface module in a kind of learning machine circuit; It is characterized in that: comprise USB interface chip J1; Five GND pins of USB interface chip J1 connect back ground connection altogether; Two line conductor VBUS, VBUS_DET are arranged on the USBD pin of USB interface chip J1; A line conductor VBUS draws and inserts other circuit modules of learning machine on the USBD pin; Another line conductor VBUS_DET inserts the main control chip of learning machines through resistance R 4 on the USBD pin, and through the RC circuit that is made up of resistance R 11 and capacitor C 7 ground connection respectively, the USBD pin of USB interface chip J1, DM pin, DP pin are connected to ground connection behind static impedance device ED3, ED2, the ED1 respectively to the USBD pin upper conductor VBUS of said USB interface chip J1 through capacitor C 6, lead VBUS_DET; The DM pin of said USB interface chip J1 also also passes through resistance R 01 ground connection respectively through resistance R 10, DP pin, and the NC pin of USB interface chip J1 is vacant.
The utility model is controlled the USB interface chip through main control chip; Between USB interface chip pin and ground, insert static impedance device electrostatic interference when preventing that USB interface from using; Constitute the RC circuit to realize filtering through resistance and the electric capacity that inserts between USB pin and the ground simultaneously; Reduce the interference of clutter, improved the usb data transmission speed USB interface.
Description of drawings
Fig. 1 is the circuit theory diagrams of the utility model.
Embodiment
As shown in Figure 1.Usb interface module in a kind of learning machine circuit; Comprise USB interface chip J1; Five GND pins of USB interface chip J1 connect back ground connection altogether; Two line conductor VBUS, VBUS_DET are arranged on the USBD pin of USB interface chip J1; A line conductor VBUS draws and inserts other circuit modules of learning machine on the USBD pin; Another line conductor VBUS_DET inserts the main control chip of learning machines through resistance R 4 on the USBD pin, and through the RC circuit that is made up of resistance R 11 and capacitor C 7 ground connection respectively, the USBD pin of USB interface chip J1, DM pin, DP pin are connected to ground connection behind static impedance device ED3, ED2, the ED1 respectively to the USBD pin upper conductor VBUS of USB interface chip J1 through capacitor C 6, lead VBUS_DET; The DM pin of USB interface chip J1 also also passes through resistance R 01 ground connection respectively through resistance R 10, DP pin, and the NC pin of USB interface chip J1 is vacant.
Claims (1)
1. the usb interface module in the learning machine circuit; It is characterized in that: comprise USB interface chip J1; Five GND pins of USB interface chip J1 connect back ground connection altogether; Two line conductor VBUS, VBUS_DET are arranged on the USBD pin of USB interface chip J1; A line conductor VBUS draws and inserts other circuit modules of learning machine on the USBD pin; Another line conductor VBUS_DET inserts the main control chip of learning machines through resistance R 4 on the USBD pin, and through the RC circuit that is made up of resistance R 11 and capacitor C 7 ground connection respectively, the USBD pin of USB interface chip J1, DM pin, DP pin are connected to ground connection behind static impedance device ED3, ED2, the ED1 respectively to the USBD pin upper conductor VBUS of said USB interface chip J1 through capacitor C 6, lead VBUS_DET; The DM pin of said USB interface chip J1 also also passes through resistance R 01 ground connection respectively through resistance R 10, DP pin, and the NC pin of USB interface chip J1 is vacant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220218376 CN202632551U (en) | 2012-05-07 | 2012-05-07 | USB interface module of learning machine circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220218376 CN202632551U (en) | 2012-05-07 | 2012-05-07 | USB interface module of learning machine circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202632551U true CN202632551U (en) | 2012-12-26 |
Family
ID=47385719
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220218376 Expired - Fee Related CN202632551U (en) | 2012-05-07 | 2012-05-07 | USB interface module of learning machine circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202632551U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105071795A (en) * | 2015-08-17 | 2015-11-18 | 广东欧珀移动通信有限公司 | Multiplex circuit based on USB interface |
-
2012
- 2012-05-07 CN CN 201220218376 patent/CN202632551U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105071795A (en) * | 2015-08-17 | 2015-11-18 | 广东欧珀移动通信有限公司 | Multiplex circuit based on USB interface |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121226 Termination date: 20130507 |