CN2757233Y - Vehicle carried audio player with flash memory and compression flash memory card multiple interface - Google Patents

Abstract

The utility model relates to a vehicle carried audio player with multiple interfaces of flash memory and compression flash memory cards, and the utility model is a vehicle carried MP3 (a third layer compressed format determined by Motion Picture Expert Group) audio playback device, wherein an input end of a master and MP3 file playing unit 1 is respectively connected with a Host interface 2 of a USB main mode, a CF card and hard disk interface card interface 2, an MMC card interface 4, a flash memory store 5, a keyboard interface 6, a USB driven mode interface 8 and a microphone input interface 9. An output end of the master and MP3 file playing unit 1 is respectively connected with an audio decoding output interface 10, a flash memory store 5 and an LED/LCD/VFD display interface unit 7, and an output end of the audio decoding output interface 10 is connected with an input end of a power amplification module 11. The utility model completely adopts a chip circuit and needs not machinery and optics devices, the utility model has the advantages of strong shock resistance, long service life of electronic devices and low requirements to working environment.

Description

The vehicle mounted audio playing apparatus that has flash memory, compact flash multiple interfaces

Technical field

The utility model is a kind of vehicle mounted MP3 (the 3rd layer compression form that motion picture expert group is determined) audio-frequence player device, belongs to automotive electronics sound equipment, the design of MP3 player, manufacturing technology field.

Background technology

Traditional onboard audio playback equipment comprises vehicle-mounted CD-ROM (Compact Disk ROM, the read-only storage medium of compact disk) player and vehicle-mounted tape player.The former reads audio-frequency music and plays from CD-ROM, the latter picks up and plays for the audio frequency simulation information in the tape by magnetic head.In today of computer technology and electronic technology, multimedia technology high speed development, the shortcoming of these two kinds of audio frequency media playback equipments is obvious day by day:

1, capacity is not enough: the capacity of CD and tape all had only about 70 minutes, and the way that the user has to take to set up the DVD multidisc CD Player in boot is expanded, and caused the inconvenience in the use.

2, a little less than the shock resistance:, make ability to work be subjected to the having a strong impact on of vibration situation of vehicle body because the tracking of CD Player, mechanism for picking are used comparatively accurate optics and mechanical principle.

3, be easy to loss, the life-span is short: the light pick-up part of CD Player for working environment steadily, cleaning and temperature range all have suitable requirement, and the working condition of automobile has caused CD Player to be easy to loss, the higher feature of failure rate.

4, it is bigger than normal that medium carries, copies the size of inconvenience: CD-ROM and tape, unfavorable carrying.Modification (rerecording) for information is also comparatively difficult.

MP3 (MPEG Layer-3, the 3rd layer compression form that motion picture expert group is determined) technology is popular in recent years a kind of audio frequency media compression coding technology, it utilizes the technology of consciousness coding, is realizing to the situation of typical compression ratio 1: 12 or more under keeping sound original CD Quality at 1: 10.Compare with CD form or magnetic tape information, the audio file of MP3 format has that volume is little, capacity is big, copy easily and advantage such as the resource acquisition approach is abundant.

USB flash memory (USB flash disk), USB hard disk, CF (Compact Flash, compact flash) storage medium such as, be under the background that nowadays computer technology and microelectric technique are rapidly progressive, to grow up, characteristics are: convenient storage, file can be easily, download and revise from computing machine fast; Volume is little, is easy to carry about with one; Volume is bigger, and USB flash disk and CF volume can not wait from 32M to 2G, and USB hard disk then capacity is bigger.

Summary of the invention

Technical matters: the purpose of this utility model provides a kind of memory space serial vehicle mounted MP3 audio playing apparatus that has USB flash disk (flash disk), CF card multiple interfaces such as (compact flash) big, easy to use.

Technical scheme: this playing device is made up of from pattern interface, microphone input interface, audio decoder output interface, power amplifier module master control and mp3 file broadcast unit, USB holotype Host interface, CF card and hard-disk interface card, mmc card interface, flash memories, keyboard interface, LED/LCD/VFD display interface unit, USB; The input end of master control and mp3 file broadcast unit meets USB holotype Host interface, CF card and hard-disk interface card, mmc card interface, flash memories, keyboard interface, USB respectively from pattern interface, microphone input interface, the output terminal of master control and mp3 file broadcast unit connects audio decoder output interface, flash memories, LED/LCD/VFD display interface unit respectively, the input end of the output termination power amplifier module of audio decoder output interface.

Wherein " AD0～AD7 " of USB holotype Host interface, CF card and hard-disk interface card, LED/LCD/VFD display interface unit end joins by " AD0～AD7 " end of address bus and master control and mp3 file broadcast unit; Corresponding " 50,49, the 48 " end that meets the master chip AT89C51SND1C of master control and mp3 file broadcast unit of " MCIK, MDAT, MCMD " end of mmc card interface; " CS3, CS2, CS1, CS0 " correspondence of flash memories connects " 62,61,60,59 " end of master control and mp3 file broadcast unit master chip AT89C51SND1C; Corresponding " 3,4,5,6,7, the 8 " end that meets master control and mp3 file broadcast unit master chip AT89C51SND1C of " ROW0, ROW1, ROW2, COL1, COL2, COL3 " end of keyboard interface; Corresponding " 46,45,44, the 43 " end that meets master control and mp3 file broadcast unit master chip AT89C51SND1C of " SCLK, DSEL, DCLK, DOUT " end of audio decoder output interface; USB is from corresponding " 21,22 " end that meets master control and mp3 file broadcast unit master chip AT89C51SND1C of " DP, DM " end of pattern interface; Corresponding " 36, the 38 " end that meets master control and mp3 file broadcast unit master chip AT89C51SND1C of " AREEN, AIN1 " end of microphone input interface.

Beneficial effect: the utility model is vehicle mounted, have the playing device of the MP3 audio file of USB flash disk, CF card and hard-disk interface.It has the advantage of following aspect for traditional vehicle mounted audio frequency is broadcast equipment:

1, adopt chip circuit fully, need not machinery and optical device, shock resistance is strong, has the advantage of electronic equipment long service life, less demanding for working environment.

2, USB flash disk comparatively popular, that be easy to carry about with one, have larger capacity, CF card, hard disk, mmc card etc. can once be play more songs as medium on the employing market.The copy of song files, modification and transmission are more convenient.

3, the utility model adopts popular chip and circuit engineering both at home and abroad, has reduced cost.

Equipment of the present utility model comprises following function:

1, discerns storage media device such as USB flash disk, CF card, mmc card, hard disk automatically, USB flash disk is promptly inserted used.

2, show in the storage medium/English song title and bibliographic structure.

3, according to the order of customer requirements layout play list.

4, play list.

5, with the unloading in storage mediums such as USB flash disk, hard disk of song style.

6, have controlled multichannel switching device shifter, can compatible existing vehicle-mounted playback equipment.

7, have the AM/FM function of radio receiver.

8, has the function that audio power amplifies.

Description of drawings

Fig. 1 is the playback equipment theory diagram of MP3 audio file vehicle mounted, that have USB flash disk, CF card and hard-disk interface.Wherein have: master control and mp3 file broadcast unit 1, USB holotype Host interface 2, CF card and hard-disk interface card 3, mmc card interface 4, flash memories 5, keyboard interface 6, LED/LCD/VFD display interface unit 7, USB are from pattern interface 8, microphone input interface 9, audio decoder output interface 10, power amplifier module 11.

Fig. 2 is the left-half of electrical schematic diagram of the present utility model;

Fig. 3 is the right half part of electrical schematic diagram of the present utility model.

Fig. 4 is the circuit diagram of USB holotype Host interface 2, flash memories 5.

Fig. 5 is the circuit diagram of CF card and hard-disk interface card 3, keyboard interface 6, LED/LCD/VFD display interface unit 7.

Fig. 6 is mmc card interface 4, the USB circuit diagram from pattern interface 8, microphone input interface 9.

Fig. 7 is the circuit diagram of audio decoder output interface 10, power amplifier module 11.

Embodiment

The USB flash disk that has of the present utility model, the serial vehicle mounted MP3 audio playing apparatus of multiple interfaces such as CF card comprises USB flash disk, the CF card, audio player, this playing device is by master control and mp3 file broadcast unit 1, USB holotype Host interface 2, CF card and hard-disk interface card 3, mmc card interface 4, flash memories 5, keyboard interface 6, LED/LCD/VFD display interface unit 7, USB is from pattern interface 8, microphone input interface 9, audio decoder output interface 10, power amplifier module 11 is formed: the input end of master control and mp3 file broadcast unit 1 connects USB holotype Host interface 2 respectively, CF card and hard-disk interface card 3, mmc card interface 4, flash memories 5, keyboard interface 6, USB is from pattern interface 8, microphone input interface 9, the output terminal of master control and mp3 file broadcast unit 1 connects audio decoder output interface 10 respectively, flash memories 5, LED/LCD/VFD display interface unit 7, the input end of the output termination power amplifier module 11 of audio decoder output interface 10.

Main hardware:

1, master control and mp3 file broadcast unit: master chip is the AT89C51SND1C that atmel corp produces,

2, USB holotype Host interface: master chip is the SL811H that CYPRESS produces,

3, CF card and hard-disk interface card:

4, mmc card interface:

5, flash memories:

6, keyboard interface:

7, LED/LCD/VFD display interface unit;

8, USB is from the pattern interface:

9, microphone input interface:

10, audio decoder output interface:

11, power amplifier module:

" AD0～AD7 " end of its USB holotype Host interface 2, CF card and hard-disk interface card 3, LED/LCD/VFD display interface unit 7 joins by " AD0～AD7 " end of the master chip AT89C51SND1C of address bus and master control and mp3 file broadcast unit 1; Corresponding " 50,49, the 48 " end that meets the master chip AT89C51SND1C of master control and mp3 file broadcast unit 1 of " MCIK, MDAT, MCMD " end of mmc card interface 4: " CS3, CS2, CS1, CS0 " correspondence of flash memories 5 connects " 62,61,60,59 " end of the master chip AT89C51SND1C of master control and mp3 file broadcast unit 1; Corresponding " 3,4,5,6,7, the 8 " end that meets the master chip AT89C51SND1C of master control and mp3 file broadcast unit 1 of " ROW0, ROW1, ROW2, COL1, COL2, COL3 " end of keyboard interface 6; Corresponding " 46,45,44, the 43 " end that meets the master chip AT89C51SND1C of master control and mp3 file broadcast unit 1 of " SCLK, DSEL, DCLK, DOUT " end of audio decoder output interface 10; USB is from corresponding " 21,22 " end that meets the master chip AT89C51SND1C of master control and mp3 file broadcast unit 1 of " DP, DM " end of pattern interface 8; Corresponding " 36, the 38 " end that meets the master chip AT89C51SND1C of master control and mp3 file broadcast unit 1 of " AREEN, AIN1 " end of microphone input interface 9.

Claims (2)

1, a kind of flash memory that has, the vehicle mounted audio playing apparatus of compact flash multiple interfaces, comprise USB flash disk, the CF card, audio player, it is characterized in that this playing device is by master control and mp3 file broadcast unit (1), USB holotype Host interface (2), CF card and hard-disk interface card (3), mmc card interface (4), flash memories (5), keyboard interface (6), LED/LCD/VFD display interface unit (7), USB is from pattern interface (8), microphone input interface (9), audio decoder output interface (10), power amplifier module (11) is formed: the input end of master control and mp3 file broadcast unit (1) connects USB holotype Host interface (2) respectively, CF card and hard-disk interface card (3), mmc card interface (4), flash memories (5), keyboard interface (6), USB is from pattern interface (8), microphone input interface (9), the output terminal of master control and mp3 file broadcast unit (1) connects audio decoder output interface (10) respectively, flash memories (5), LED/LCD/VFD display interface unit (7), the input end of the output termination power amplifier module (11) of audio decoder output interface (10).

2, the vehicle mounted audio playing apparatus that has flash memory, compact flash multiple interfaces according to claim 1, " AD0～AD7 " that it is characterized in that the master chip AT89C51SND1C of " AD0～AD7 " end by address bus and master control and mp3 file broadcast unit (1) of USB holotype Host interface (2), CF card and hard-disk interface card (3), LED/LCD/VFD display interface unit (7) holds and joins; " MCIK, MDAT, MCMD " end correspondence of mmc card interface (4) connects " 50,49,48 " end of the master chip AT89C51SND1C of master control and mp3 file broadcast unit (1); " CS3, CS2, CS1, CS0 " correspondence of flash memories (5) connects " 62,61,60,59 " end of the master chip AT89C51SND1C of master control and mp3 file broadcast unit (1); " ROW0, ROW1, ROW2, COL1, COL2, COL3 " end correspondence of keyboard interface (6) connects " 3,4,5,6,7,8 " end of the master chip AT89C51SND1C of master control and mp3 file broadcast unit (1); " SCLK, DSEL, DCLK, DOUT " end correspondence of audio decoder output interface (10) connects " 46,45,44,43 " end of the master chip AT89C51SND1C of master control and mp3 file broadcast unit (1); USB connects " 21,22 " end of the master chip AT89C51SND1C of master control and mp3 file broadcast unit (1) from " DP, DM " end correspondence of pattern interface (8); " AREEN, AIN1 " end correspondence of microphone input interface (9) connects " 36,38 " end of the master chip AT89C51SND1C of master control and mp3 file broadcast unit (1).

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