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.
●Features
USB2.0 Full Speed host I/F function contained.
SD card I/F function contained.
2
I C format I/F function contained.
2
Protocol conversion from I C to USB HID or from USB
2
HID to I C.
(BU94502AMUV and BU94502AKS2 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.
2
(I S, EIAJ, S/PDIF)
Audio DAC contained.
Regulator for internal CORE power supply contained.
●Applications
Audio products, etc
●Line
up
Part number
BU94501AMUV
BU94501AKS2
BU94502AMUV
BU94502AKS2
iPod
Not supported
Package
VQFN040V6060
SQFP-T52
VQFN040V6060
SQFP-T52
Reel of 2000
Tray of 1000
Reel of 2000
Tray of 1000
Ordering part number
BU94501AMUV-E2
BU94501AKS2
BU94502AMUV-E2
BU94502AKS2
●Package
W(Typ.) x D(Typ.) x H(Max.)
VQFN040V6060
6.00mm x 6.00mm x 1.00mm
SQFP-T52
12.00mm x 12.00mm x 1.50mm
Supported
○Product
structure:
Silicon Monolithic integrated circuit
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© 2012 ROHM Co., Ltd. All rights reserved.
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○
Radiation resistance design is not arranged
TSZ02201-0V2V0E600070-1-2
2017.3.21 Rev.004
BU9450xAxxx series
●Basic
circuit application diagram
-part1
This LSI builds in regulator for internal CORE power supply (1.5V).
DVDD_M terminal of 10PIN connect to bypass condenser and don’t connect to power supply (3.3V)
Please confirm the optimal oscillation circuit parameters applicable to your systems or products with the oscillator manufacturer in advance.
VQFN040V6060 package exposes its frame of the backside of package. Note that this part is assumed to use after providing heat
dissipation treatment to improve heat dissipation efficiency. Try to occupy as wide as possible with heat dissipation pattern not only on the
board surface but also the backside.
Figure 1. an example of connection circuit application(BU9450xAMUV)
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BU9450xAxxx series
●Basic
circuit application diagram
-part2
This LSI builds in regulator for internal CORE power supply (1.5V).
DVDD_M terminal of 52PIN connect to bypass condenser and don’t connect to power supply (3.3V)
Please confirm the optimal oscillation circuit parameters applicable to your systems or products with the oscillator manufacturer in advance.
Figure 2. an example of connection circuit application(BU9450xAKS2)
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© 2012 ROHM Co., Ltd. All rights reserved.
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BU9450xAxxx series
●Difference
of BU9450XA Series features
Item
Package
Number of pins
Power supply
USB
Host I/F
BU94502AMUV
40pin
3.3V (inner 1.5V regulator )
USB Full speed(12Mbps),
USB mass storage class
SPI mode
SD, SDHC, MMC, mini-SDcard
Supported
Supported
Not supported *1
Not supported *1
Supported
Supported
Supported
Supported
I S, EIAJ, SPDIF
Supported
16.9344MHz
*.asf, *.wma
*.m4a, *.3gp, *.mp4
*.wav
Supported
(*1)
*.mp3, *.mp2, *.mp1
2
2
BU94501AMUV
BU94502AKS2
52pin
BU94501AKS2
VQFN040V6060
SQFP-T52
3.3V (inner 1.5V regulator )
USB Full speed(12Mbps),
USB mass storage class
SPI mode
SD, SDHC, MC, mini-SDcard
Supported
Supported
Not supported *1
Not supported *1
Supported
Supported
Supported
Supported
I S, EIAJ, SPDIF
Supported
16.9344MHz
*.asf, *.wma
*.m4a, *.3gp, *.mp4
*.wav
Supported
(*1)
*.mp3, *.mp2, *.mp1
SD card I/F
iPod
iPod automatic
enumeration
2
I C command I/F
(Slave)
Patch cord download
Change the Setting of
timeout and retry mode
in USB memory or SD
card mount operation
Audio line output
Digital audio output
Sample rate convertor
clock
Playable MP3 files
Playable WMA files
Playable AAC files
Playable WAV files
Browsing function
*1
For using of BU94502AMUV and BU94502AKS2, It is necessary to become a licensee of Apple Inc. regarding "Made
for iPod/iPhone/iPad License".
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
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TSZ02201-0V2V0E600070-1-2
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