BU94603KV Functional Specifications
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Confidential
Target Spec 0.12
I. Features
◊ BU94603KV is AAC+WMA+MP3 decoder IC in which a USB host I/F, SD memory card I/F, audio DAC and
system control functions are built. Using a KEY or I2C interface command, the IC reads out a MP3 file written to
a memory device having a USB I/F or a SD memory card. All the operations required before the data can be
output to audio devices are incorporated into one chip.
◊ BU94603KV supports STAND ALONE MODE which is enabled by commands entered from the keyboard
(hereinafter referred to as MODE1), AUTO SLAVE MODE which is enabled by commands entered from the
master microcomputer, same as those entered from the keyboard, via the built-in I2C interface (hereinafter
referred to as MODE2) and MANUAL SLAVE MODE which can send the memory device information to the
master microcomputer via the I2C interface and completely control sequences such as a play sequence by the
master microcomputer (hereinafter referred to as MODE3).
◊ BU94603KV supports fast forward playing and fast backward playing with music.
◊ BU94603KV outputs folder names, file names, ID3TAG (V1.0, V1.1 V2.2 V2.3 and V2.4) information and
WMA-TAG information and AAC-TAG(iTunes Meta-data) information via the I2C interface. This function is
enabled only in MODE 2 and MODE 3.
◊ BU94603KV supports audio line output, audio serial three-line (I2S) output and digital audio interface (SPDIF)
output.
◊ Reading a specified file data is possible from USB memory. *Only a file that exists in root folder corresponds.
I.1 USB host I/F
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Builds in the USB Full speed (12 Mbps) HOST control function.
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Supports the USB mass storage class.
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It doesn't correspond to external HUB.
I.2 SD card I/F
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Supports the SPI mode.
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Supports the MMC and mini-SD cards.
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Supports the SDHC cards.
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Supports the SD ver1.01 (file system).
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Does not support CPRM.
I.3 I2C I/F
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Communicates with the master microcomputer using an I2C interface format.
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Supports the standard mode (100 kbps) and fast mode (400 kbps).
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Supports a 7-bit address.
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Can select four types of slave addresses.
I.4 Audio output
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1bit-DAC output
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Builds in the digital soft mute function.
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Supports the I2C format and digital audio interface (SPDIF) audio output.
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Builds in sound effects of POPS, JAZZ, ROCK, CLASSIC, R&B and BassBoost.*
* Only audio line output is enabled.
I.5 FAT analysis
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Supports FAT16 and FAT 32.
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Supports VFAT (long file name).
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Supports multi-partition up to 1.
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The maximum number of playable folders within each folder is 65534.
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The maximum number of playable files within each folder is 65534.
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The maximum number of playable folders within each device is 65534.
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The playable folder hierarchy is up to 8 layers containing the root directory.
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The playable file extension supports *.m4a, *.3gp, and *.mp4 for AAC, *.wma and *.asf for WMA, *.mp3, *.mp2, and
*.mp1 for MP3. For *.mp2 and *.mp1, play enabled/disabled can be selected. Upper case letters and lower case
letters are not distinguished in the file extension.
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Sorts and plays up to 100 folders and 100 files in the order of UNICODE.
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Can obtain up to 64 bytes as the folder name or file name.
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Supports 1 sector of 512, 1024, 2048 and 4096 bytes.
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Supports up to 2G-1 bytes as the file size.
