Datasheet
USB Audio Decoder LSI Series
AAC/WMA/MP3
+SD Memory Card + iPod
BU94502Cxxx Series
Description
BU94502Cxxx 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.
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.
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.
Folder pass table making function 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.
VQFN040V6060
6.00mm x 6.00mm x 1.00mm
SQFP-T52
12.00mm x 12.00mm x 1.50mm
Applications
Audio products, etc
Line up
Part number
BU94502CMUV
BU94502CKS2
Package
VQFN040V6060
SQFP-T52
Reel of 2000
Tray of 1000
Ordering part number
BU94502CMUV-E2
BU94502CKS2
○Product
structure：
Silicon Monolithic integrated circuit
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© 2016 ROHM Co., Ltd. All rights reserved.
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○
Radiation resistance design is not arranged
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TSZ02201-0V1V0E600170-1-2
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BU94502Cxxx 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(BU94502CMUV)
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© 2016 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
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TSZ02201-0V1V0E600170-1-2
2016.01.05 Rev.001
BU94502Cxxx 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(BU94502CKS2)
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TSZ02201-0V1V0E600170-1-2
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BU94502Cxxx series
Difference of BU94502Cxxx Series features
Item
Package
Number of pins
Power supply
USB
Host I/F
BU94502CMUV
VQFN040V6060
40pin
3.3V (inner 1.5V regulator )
USB Full speed(12Mbps),
USB mass storage class
SPI mode
SD, SDHC, MMC, mini-SDcard
Supported
Supported
Supported
Supported
Supported
I S, EIAJ, SPDIF
Supported
16.9344MHz
(Note 1)
2
2
BU94502CKS2
SQFP-T52
52pin
3.3V (inner 1.5V regulator )
USB Full speed(12Mbps),
USB mass storage class
SPI mode
SD, SDHC, MC, mini-SDcard
Supported
Supported
Supported
Supported
Supported
I S, EIAJ, SPDIF
Supported
16.9344MHz
(Note 1)
SD card I/F
Protocol conversion from
I2C to USB HID or from
USB HID to I2C
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
*.mp3, *.mp2, *.mp1
*.asf, *.wma
*.m4a, *.3gp, *.mp4
*.wav
*.mp3, *.mp2, *.mp1
*.asf, *.wma
*.m4a, *.3gp, *.mp4
*.wav
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© 2016 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
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TSZ02201-0V1V0E600170-1-2
2016.01.05 Rev.001
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