Datasheet
USB Audio Decoder LSI Series
AAC/WMA/MP3
+SD Memory Card + iPod
BU94601KV BU94603KV
BU94604BKV
●Package
W(Typ.) x D(Typ.) x H(Max.)
●Description
BU94601KV / BU94603KV / BU94604BKV are AAC+
WMA + MP3 decoder IC which contains USB host, SD
card I/F, audio DAC, system controller, and regulator for
internal CORE power supply.
●Features
USB2.0 Full Speed host I/F function contained.
Protocol conversion from I
2
C to USB HID or from
USB HID to I
2
C. (Only BU94604BKV)
SD card I/F function contained.
I
2
C I/F function contained.
FAT analysis function contained.
MP3 decode function contained. (available for
MPEG1, 2 and 2.5, Layer 1, 2 and 3)
WMA decode function contained.
(Except BU94601KV)
Available for WMA9 standard and not available for
DRM
AAC decode function contained.
(Except BU94601KV)
Available for MPEG4 AAC-LC and not available for
DRM
Sample Rate Converter contained.
System Controller contained.
LED Controller contained.
KEY matrix Controller contained.
Stand Alone mode contained.
External processor can control. (Slave mode)
Audio DAC contained.
Sound Effect function contained.
Digital Audio Output(I
2
S, S/PDIF) function contained.
File Name, Folder Name Sorting.
ID3TAG and WMATAG and AACTAG Analysis.
Reading a specified file data is possible from USB
memory.
LUN is selectable.
Regulator for internal CORE power supply
contained.
VQFP64pin(0.5mm pitch)
●Applications
Audio products, etc
●Line
up
Part number
BU94601KV
BU94603KV
BU94604BKV
Format
MP3
AAC/WMA/MP3
AAC/WMA/MP3
iPod
Not supported
Supported
Package
VQFP64
VQFP64
VQFP64
Reel of 2000
Reel of 2000
Reel of 2000
Ordering part number
BU94601KV-ZAE2
BU94603KV-ZAE2
BU94604BKV-ZAE2
VQFP64
12.00mm x 12.00mm x 1.60mm
○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
TSZ02201-0V2V0E600010-1-2
2012.07.12 Rev.001
BU94601KV BU94603KV BU94604BKV
●Basic
circuit application diagram-part1
Datasheet
Figure 1. an example of connection circuit application (BU94601KV/BU94603KV/BU94604BKV MODE1) *
Figure 2. an example of connection circuit application (BU94601KV/BU94603KV MODE2/3) *
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TSZ02201-0V2V0E600010-1-2
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BU94601KV BU94603KV BU94604BKV
●Basic
circuit application diagram-part2
Datasheet
Figure 3. an example of connection circuit application (BU94604BKV MODE2/3) *
This LSI has built in regulator for internal CORE power supply. DVDD terminal of 27PIN and 57PIN connect to
bypass condenser. DVDD terminal of 27PIN and 57PIN don’t connect to power supply.
The reference circuit and reference circuit parameters for crystal oscillator are shown above. The circuit
parameters introduced above is not taking into consideration the environment in customer’s systems or set‘s
board. Therefore, ROHM is not guaranteed this content in any circuits. Please check the optimal circuit parameter
in customer’s actual systems or products with the oscillator manufacturer.
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
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TSZ02201-0V2V0E600010-1-2
2012.07.12 Rev.001
BU94601KV BU94603KV BU94604BKV
●Difference
of BU94601KV/BU94603KV/BU94604BKV features
Item
Package
Number of pins
Power supply
BU94601KV
BU94603KV
VQFP64
64pin
3.3V (inner 1.5V regulator )
USB Full speed(12Mbps)
USB Host I/F
USB mass storage class
SPI mode
SD Card I/F
SD, SDHC, MMC, mini-SDcard
Supported
Supported
I
2
S
Digital audio output
SPDIF
Sample rate converter
clock
Playable MP3 files
Playable WMA files
Playable AAC files
iPod
Not supported
Not supported
Not supported
Supported
16.9344MHz
*.mp3,*.mp2,*.mp1
*.asf,*.wma
*.m4a,*.3gp,*.mp4
Supported*1
Datasheet
BU94604BKV
I
2
C command I/F(Slave）
Audio line output
*1 For using of BU94604BKV, 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.
TSZ22111・15・001
4/66
TSZ02201-0V2V0E600010-1-2
2012.07.12 Rev.001
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