CN201965931U - Universal serial bus (USB) multi-functional integrated services digital network module applied to digital audio player - Google Patents
Universal serial bus (USB) multi-functional integrated services digital network module applied to digital audio player Download PDFInfo
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- CN201965931U CN201965931U CN2011200095499U CN201120009549U CN201965931U CN 201965931 U CN201965931 U CN 201965931U CN 2011200095499 U CN2011200095499 U CN 2011200095499U CN 201120009549 U CN201120009549 U CN 201120009549U CN 201965931 U CN201965931 U CN 201965931U
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Abstract
The utility model provides a universal serial bus (USB) multi-functional integrated services digital network module applied to a digital audio player, which comprises a digital audio decoding chip. The digital audio decoding chip is connected with a USB electrical signal selector, the USB electrical signal selector is connected with a USB host controller interface and a USB device interface through a USB bus, the USB host controller interface is connected with a USB flash disk and the USB device interface is connected with a USB interface of a computer. The USB multi-functional integrated services digital network module applied to the digital audio player has the advantages of enabling a single device to support a plurality of USB functions simultaneously, overcoming the shortcoming that traditional players have single playing function, expanding traditional players to enable the players to serve as portable computers or even portable speakers of handheld devices, and simultaneously expanded traditional players can also serve as card readers. Based on the two advantages, USB multi-functional integrated services digital network module applied to the digital audio player can also support USB flash disk music playing function, simultaneously the shortcomings that traditional USB speakers are single in function and can not support the player function are overcome.
Description
Technical field
The utility model relates to the USB function and the interface module of mini audio digital audio-frequency playing equipment, is specially a kind of multi-functional Integrated Service Digital Network module of USB that is applied to digital audio-frequency player.
Background technology
Existing digital audio-frequency player supports that mostly USB interface is used as data transmission, perhaps be used to read USB dish content (USB master mode), be used for that perhaps digital audio-frequency player is used as USB and coil use (USB is from pattern), single USB function is only supported in common application, can't support USB master control and slave unit function simultaneously in system.When as slave unit, also be single support Large Volume Data transmission mode (mass storage specification) simultaneously, do not support USB sound card function.
Summary of the invention
The purpose of the utility model technology is to overcome the deficiencies in the prior art, a kind of USB is provided multi-functional Integrated Service Digital Network module, based on digital audio-frequency player and support master control, the card reader of USB, the technology of sound card three functional unifications, can be used for mobile device and mini audio.
The technical scheme that provides according to the utility model, the described multi-functional Integrated Service Digital Network module of USB that is applied to digital audio-frequency player, comprise the digital audio decoding chip, described digital audio decoding chip links to each other with USB electric signal selector switch, USB electric signal selector switch connects USB master control interface and USB device interface by usb bus, described USB master control interface connects USB flash disk, and the USB device interface connects the USB interface of computer.
The utility model has the advantages that: this technology can allow single equipment support a plurality of USB functions simultaneously, overcome the single playing function of conventional player, make conventional player can expand portable loudspeaker box as mobile model computer or even handheld device, simultaneously also can on the two basis, can also support the USB flash disk music playback function as card reader; Also overcome simultaneously the functional defect that traditional USB speaker function singleness can not be supported player.This sample new technique practicality can realize the maximization of USB function on conventional player and the USB speaker on the basis of limited cost.
Description of drawings
Fig. 1 is the utility model circuit structure block diagram.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.
As shown in Figure 1, the utility model is applied to the digital audio-frequency player system, be mainly concerned with the digital audio decoding chip in the digital audio-frequency player, also comprise USB electric signal selector switch, described USB electric signal selector switch links to each other with the digital audio decoding chip, described USB electric signal selector switch connects USB master control interface and USB device interface by usb bus, and described USB master control interface connects USB flash disk, and the USB device interface connects the USB interface of computer.This USB electric signal selector switch can be independent device, also can be embedded in the System on Chip/SoC (SoC) of digital audio-frequency player.The digital audio decoding chip is responsible for audio decoder and master control, the signal route of USB electric signal selector switch control USB master control interface and equipment interface.Digital audio-frequency player is selected the working method of master control and slave unit electric signal by described USB electric signal selector switch.
The embedded USB principal and subordinate control interface of digital audio decoding chip comprises interconnective USB controller and USB transceiver two parts.The USB controller designs for pure digi-tal, and it is bearing data-transformation facility and control function between system and the USB transceiver.The USB transceiver is the circuit that digital-to-analogue is mixed, and its effect is to finish the string and the conversion of transmission data and finish the USB physical layer protocol.Select the USB controller as required when the system software of digital audio decoding chip and be operated in master control (host) or slave unit (device) pattern, come external USB master control interface or the USB device interface of corresponding gating by USB electric signal selector switch simultaneously, so just can be flexibly master control (host) function and equipment (device) function of USB be integrated in the product.
With under USB electric signal selector switch cooperates, system can be implemented under digital audio-frequency player connects computer by the USB line the situation and finishes USB power supply and USB master control function (promptly reading the function of file in the circumscribed USB dish) or USB power supply and USB slave unit function simultaneously at the embedded USB principal and subordinate control interface of digital audio decoding chip.
Below introduce various USB function of the present utility model in detail.
When being operated in USB master control (host) pattern, player is operated under the audio decoder pattern.The system software of digital audio decoding chip switches to master control (host) pattern with the USB controller, and is strobed into the electric signal path of USB master control interface.The digital audio decoding chip reads the music file contents in the USB flash disk, decoding, decoded audio stream is transferred in the numeral, and gives amplifying circuit by output terminal with simulated audio signal, amplifying circuit is exported to loudspeaker after seeing the sound signal amplification of being imported.
When being operated in USB slave unit (device) card reader pattern, player stops decoding and goes forward side by side into the card reader pattern.Digital audio decoding chip system software switches to slave unit (device) pattern with the USB controller, and is strobed into the electric signal path of USB device interface.Be inserted in the USB connecting line between the USB interface of this USB device interface and computer, player is connected to computer as card reader.When SD card in the computer to access digital audio-frequency player or Nand flash memory (nand flash), scsi command and data are transmitted at USB slave unit electric interfaces.
When being operated in USB slave unit (device) sound card pattern, player stops the entering tone mode card of going forward side by side of decoding.Digital audio decoding chip system software switches to slave unit (device) pattern with the USB controller, and is strobed into the electric signal path of USB device interface.Be inserted in the USB connecting line between the USB interface of this USB device interface and computer, player is connected to computer as the audio frequency apparatus of a standard.Computer switches and when selecting player as first-selected audio frequency apparatus, computer system software (for example Windows operating system) is according to given audio frequency parameter, with the USB slave unit interface of digitized audio stream by USB line input player, player is transferred to this audio stream in the numeral, and export to loudspeaker after amplifying by the sound signal that output terminal is given simulated audio signal amplifying circuit, amplifying circuit see to be imported.
Use technology of the present utility model, single mini audio or mobile device system can be supported USB master control function (host) and slave unit function (device) simultaneously, and USB sound card function is provided; Player can be realized the USB flash disk music by USB master control interface, can support functions of card reader and sound card function by slave unit interface interface.Under major state, when inserting USB flash disk, the digital audio decoding chip reads voice data from USB flash disk, and decoding is also play.Under the slave unit state, when equipment inserts computing machine by the USB connecting line, can select functions of card reader or sound card function at player, realize the Integrated Service Digital Network function of card reader and sound card.When selecting functions of card reader, digital audio-frequency player is operated in the card reader state, what support is Mass-Storage agreement in the USB standard agreement, just can visit the SD card on the digital audio-frequency player so on computers, nand flash memory storage mediums such as (nand flash).When selecting the sound card function, digital audio-frequency player is operated in USB sound card state, what support is USB Audio agreement in the USB standard agreement, when player inserts computing machine by the USB connecting line, the sound card equipment of one " USB Audio Speaker " can be discerned and generate to computing machine automatically, sound in the computer system and music just can be transferred to the player end sounding by the USB connecting line like this, and do not need to use the sound card sounding that the computing machine plate carries.
Claims (1)
1. be applied to the multi-functional Integrated Service Digital Network module of USB of digital audio-frequency player, comprise the digital audio decoding chip, it is characterized in that: described digital audio decoding chip links to each other with USB electric signal selector switch, USB electric signal selector switch connects USB master control interface and USB device interface by usb bus, described USB master control interface connects USB flash disk, and the USB device interface connects the USB interface of computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200095499U CN201965931U (en) | 2011-01-13 | 2011-01-13 | Universal serial bus (USB) multi-functional integrated services digital network module applied to digital audio player |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200095499U CN201965931U (en) | 2011-01-13 | 2011-01-13 | Universal serial bus (USB) multi-functional integrated services digital network module applied to digital audio player |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201965931U true CN201965931U (en) | 2011-09-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200095499U Expired - Lifetime CN201965931U (en) | 2011-01-13 | 2011-01-13 | Universal serial bus (USB) multi-functional integrated services digital network module applied to digital audio player |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201965931U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103714845A (en) * | 2012-10-09 | 2014-04-09 | 昆达电脑科技(昆山)有限公司 | Electronic device provided with two USB interfaces |
| CN107358841A (en) * | 2017-05-24 | 2017-11-17 | 四川太极熊科技有限公司 | A kind of experiment box of integrated sensor and actuator |
-
2011
- 2011-01-13 CN CN2011200095499U patent/CN201965931U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103714845A (en) * | 2012-10-09 | 2014-04-09 | 昆达电脑科技(昆山)有限公司 | Electronic device provided with two USB interfaces |
| CN107358841A (en) * | 2017-05-24 | 2017-11-17 | 四川太极熊科技有限公司 | A kind of experiment box of integrated sensor and actuator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110907 |
|
| CX01 | Expiry of patent term |