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PDF BU94501AMUV Data sheet ( Hoja de datos )
| Número de pieza | BU94501AMUV | |
| Descripción | USB Audio Decoder LSI | |
| Fabricantes | ROHM Semiconductor | |
| Logotipo |  |
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Datasheet
USB Audio Decoder LSI Series
AAC/WMA/MP3
+SD Memory Card + iPod
BU9450xAxxx Series
●Description
BU9450xAxxx series are WAV/AAC/WMA/MP3 decoder
LSI which contains USB host, SD card I/F, audio DAC,
system controller, regulator for internal CORE power
supply.
●Package W(Typ.) x D(Typ.) x H(Max.)
●Features
USB2.0 Full Speed host I/F function contained.
SD card I/F function contained.
I2C format I/F function contained.
Protocol conversion from I2C to USB HID or from USB
HID to I2C.
(BU94502AMUV and BU94502ASK2 only)
MP3 decode function contained. (Available for
MPEG1, 2 and 2.5, Layer 1, 2 and 3)
WMA decode function contained. (Available for WMA9
standard and not available for DRM)
AAC decode function contained. (available for
MPEG4 AAC-LC and not available for DRM)
WAV format file playing function contained.
Sample Rate Converter contained.
System Controller contained.
FAT analysis function contained.
Browsing function of File Names, Folder Names on
music playing contained.
ID3TAG and WMATAG and AACTAG Analysis.
Fast forward playing and fast backward playing
function contained.
Resume function contained.
Reading a specified file data is possible from
connected memory.
LUN is selectable.
Sound Effect function contained.
Digital Audio Out function contained.
(I2S, EIAJ, S/PDIF)
Audio DAC contained.
Regulator for internal CORE power supply contained.
VQFN040V6060
6.00mm x 6.00mm x 1.00mm
SQFP-T52M
12.00mm x 12.00mm x 1.50mm
●Applications
Audio products, etc
●Line up
Part number
BU94501AMUV
BU94501AKS2
BU94502AMUV
BU94502AKS2
iPod
Not supported
Supported
Package
VQFN040V6060 Reel of 2000
SQFP-T52M
Tray of 1000
VQFN040V6060 Reel of 2000
SQFP-T52M
Tray of 1000
Ordering part number
BU94501AMUV-E2
BU94501AKS2
BU94502AMUV-E2
BU94502AKS2
○Product structure：Silicon Monolithic integrated circuit ○Radiation resistance design is not arranged
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
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BU9450xAxxx series
●Block diagram
Datasheet
16.9344
MHz
3.3V
USB
I/F
SD
I/F
File
System
(FAT12
/16/32)
USB/
System
PLL
1.5V LDO
Data
Buffer
MP3/WMA/
AAC/WAV
Decoder
TAG Analysis /
Browsing
SRC
I2S
OUT
SPDIF
OUT
System Controller
Command
I/F
Serial
(SPI)
Data I/F
Audio
DAC
I2S Out
SPIDIF Out
Power
AMP
/SD Title 5. SONG_E
01:10 Album ALBUM Z
Artist ARTIST A
User I/F
MCU
Main Control Block
Figure 3. Block diagram
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
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5 Page 
BU9450xAxxx series
●Description of each block’s movement
-part2
Datasheet
7. FAT analysis
Supports FAT32, FAT16 and FAT12 file system.
Supports VFAT (long file name).
Supports multi-partition up to 1 partition.
Supports multi-drive up to 1 drive.
Supports playable folder hierarchies up to 16 hierarchies whose full path including the file name is within 260
characters.
Supports playable file extension of *.wav for WAV files.
Supports playable file extensions of *.m4a, *.3gp and *.mp4 for AAC files.
Supports playable file extensions of *.asf and *.wma for WMA files.
Supports playable file extensions of *.mp3, *.mp2 and*.mp1 for MP3 files. For *.mp2 and *.mp1, the function
allows you to select whether to play. Does not extinguish between upper case letters and lower case letters of file
extensions.
Up to 256 folders and 256 files can be sorted and played in the order of UNICODE when sorting functional
effective.
Can obtain 5 file names ahead from current music file.
Can obtain a folder name or file name within 128 bytes.
Supports 512, 1024, 2048 and 4096 bytes per sector.
Playable file size up to 2G-1 byte. A file over 2Gbyte is recognized as a playable file, too. But, it is for 2Gbyte
-1byte that it can play.
Supports the device size up to FAT specification (2T byte).
8. Control from master microcomputer (little endian order)
Can control from the master microcomputer using the I2C interface.
Controllable using commands of play, pause, stop, tune skip, tune forward, folder move, device change, volume
setting, repeat change, random play, digital audio output setting, sound effect setting and direct tune selection and
etc.
Can read information on internal status during play or stop, folder number, file number within the folder, play time,
total number of folders, total number of files, name of folder being played, name of file being played and TAG (title,
artist, album, genre), and etc.
9. MP3 decoder
⋅ Supports MPEG audio 1, 2 and 2.5.
⋅ Supports Layer1, 2 and 3.
⋅ Supports sample rate of 8 k, 16 k, 32 k, 11.025 k, 22.05 k, 44.1 k, 12 k, 24 k and 48 kHz.
⋅ Supports bit rate of 8 to 320 kbps and VBR (Variable Bit Rate). *Excluding the free format
⋅ Supports ID3TAG V1.0, V.1, 1, V2.2, V2.3 and V2.4.
(Up to 128 bytes can obtain for album, artist, title and genre, respectively.)
10. WMA decoder
⋅ Supports Windows Media Audio 9 standard.
⋅ Not supports DRM files.
⋅ Supports sample rate of 8 k, 16 k, 32 k, 11.025 k, 22.05 k, 44.1 k and 48 kHz.
⋅ Supports bit rate of 5 to 384 kbps and VBR (Variable Bit Rate).
⋅ Supports WMA-TAG.
⋅ (Up to 128 bytes can obtain for album, artist, title and genre, respectively.)
11. AAC decoder
⋅ Supports MPEG4 AAC-LC (Audio stream).
⋅ Based on 3GPP TS 26.244 and iTunes.
⋅ Supports File Type of m4a, mp4 and 3gpX. (X stands for any numeric value.)
⋅ Not supports DRM files.
⋅ Supports sample rate of 8 k, 16 k, 32 k, 11.025 k, 22.05 k, 44.1 k, 12 k, 24 k and 48 kHz.
⋅ Supports bit rate of 8 to 320kbps and VBR (Variable Bit Rate).
⋅ Supports AACTAG (iTunes Meta-data and 3GP Meta-data).
(Up to 128 bytes can obtain for album, artist, title and genre, respectively.)
*For files other than those encoded by iTunes, sound interruption may occur when skipping or forwarding to the
next tune if streams such as gaps and video data are contained in the file.
12. WAV play
⋅ Supports WAV format.
⋅ Supports sample rate of 8 k, 16 k, 32 k, 11.025 k, 22.05 k, 44.1 k, 12 k, 24 k and 48 kHz.
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
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TSZ02201-0V2V0E600070-1-2
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11 Page | ||
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