BU94603KV-E2 ROHM Semiconductor, BU94603KV-E2 Datasheet - Page 47

• Manufacturer Part Number: BU94603KV-E2
• Description: Interface - CODECs USB HOST MP3 DECODER
• Manufacturer: ROHM Semiconductor
• Type: USB Audio Decoderr

Specifications of BU94603KV-E2

• Rohs: yes
• Conversion Rate: 48 kSPs
• Interface Type: I2C
• Number Of Dacs: 3
• Operating Supply Voltage: 3 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: VQFP-64
• Minimum Operating Temperature: - 40 C
• Snr: 96 dB
• Supply Current: 65 mA
• Thd Plus Noise: 0.02 %

© 2012 ROHM Co., Ltd. All rights reserved.
BU94603KV
www.rohm.com
VII.4 MODE3
Command name
GET_NUMBER
GET_DIRECT
CHNG_DEV
VII.4.1 Command operation
GET_ID3
MODE3 specifies and plays the AAC/WMA/MP3 file to be played by the master microcomputer by outputting the
AAC/WMA/MP3 file/folder status information, written to USB memory or SD memory card, to the master
microcomputer.
The LSI sends commands to obtain the file/folder information in USB memory or SD memory card, to analyze ID3Tag,
to analyze WMATag, to analyze AACTag, and to set a file to be played and start playing it.
Table VII.4.1 shows the commands available in MODE3. When sending a command other than listed below in
MODE3, it is ignored.
ABORT
PAUSE
STOP
VOL+
VOL-
Command
length
byte
2
0x50
1st
0x0A
0x0B
0x0C
0x02
0x03
0x04
0x05
0x08
0x09
2nd
Command
Table VII.4.1 MODE3 Command
3rd-
-
-
-
-
-
-
-
-
-
· When receiving “PAUSE” command during play, the master stops
· This command stops the operations of WMATag/ID3Tag analysis.
· This command stops playing the AAC/WMA/MP3 file and stop at
· When SEL_VOL is set to H, “VOL+” command is enabled.
· When receiving “VOL+” command, the master controls sound
· Sound volume can be controlled at 32 steps from -∞ (minimum
· When SEL_VOL is set to H, “VOL-“command is enabled.
· When receiving “VOL-“command, the master controls sound
· Sound volume can be controlled at 32 steps from -∞ (minimum
· The command selects the device between USB memory and SD
· After selecting the device, the LSI waits for a command.
· This command obtains the folder information (*see VII.4.3) and file
· Read the information using the status commands
· The status of “ANA_END”, “FOLINF”, “FILINF”, “FOLFULL” and
· This command obtains the number of files and folders for the folder
· Read the information using status command “READ_NUMBER”.
· The number of non-AAC/WMA/MP3 files is ignored.
· The statuses of “ANA_END” are reset.
· This command performs TAG analysis for the valid file set by
· The command also analyzes even if the folder is not specified.
- The statuses of “ID3EXIST”, “ID3RSID1” and “ID3RSID2” are reset.
· This command stops the operations of Tag analysis, folder analysis
· The statuses of “ANA_END”, “FOLINF”, “FILINF”, “FOLFULL”,
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playing the AAC/WMA/MP3 files temporarily.
top of this AAC/WMA/MP3 file.
volume.
volume) to 0dB (maximum volume).
volume.
volume) to 0dB (maximum volume).
memory card. To do this, both devices should be connected or
one device should correspond to the other (USB to SD or SD to
USB). Otherwise, this command is ignored.
information (*see VII.4.3) for the folder set by SET_DIRECT.
“READ_FOLDER_INFO” and “READ_FILE_INFO”.
“FILFULL” are reset.
set by SET_DIRECT.
SET_DIRECT.
However, at the end of analysis, a status in which Tag information is
not contained will be output.
and file analysis.
“FILFULL”, "ID3EXIST", "ID3RSID1" and "ID3RSID2" are reset.
Operation description
Technical Note
2012.07 - Rev.B