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这是一粒灰尘
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于 2008-10-01 12:19 个人信息 发悄悄话 引用回复 编辑本帖 搜索发帖 复制本帖 收藏本帖 投诉该帖
BU9432的一些资料 pdf太大,放弃上传,有试图改造者可联系我 BU9432-C1 and BU9434-C2 06.15.06 ROHM’s BU9432-C1 and BU9434-C2 audio system LSIs integrate a USB 2.0 full-speed host controller, a 3-channel power supply, an MP3 decoder, a DAC, and a system controller into a single chip, allowing playback of MP3 files contained on flash memory via USB. In addition, the BU9432-C1 features a headphone amplifier while the BU9434-C2 incorporates an SD card interface controller, a sound effecter, and I2S/SPDIF interface support. The BU9432-C1 and BU9434-C2 are offered in the TQFP64V and VQFP64 package types, respectively. Availability BU9432-C1 is currently in mass production while samples of BU9434-C2 will be available at the end of September with mass production to begin in December. Applications Audio equipment BU9432-C1 and BU9434-C2 Features: System Controller Integrate and control USB, SD, MP3 systems KEY or Serial Command Input—automatically searches for MP3 files in the USB/SD memory for playback USB Host Interface Controller USB 1.1 and USB 2.0 full speed host Mass storage class USB HUB supported (BU9434-C2) USB 1.1 / 2.0 Flash Memory / HDD Memory size: 32M-2TByte SD Card Interface Controller (BU9434-C2) MMC / Mini-SD supported SPI mode supported CPRM not supported FAT File System FAT16 and FAT32 supported Unlimited number of folders possible (but depth limit is 8) Number of files: 65,534 Compatible file extensions: .MP3, .MP2*, MP1* Hidden file playback capability Multi-partition support (BU9434-C2) *It is possible to select this file format MP3 Decoder MPEG Audio 1, 2, 2.5 Layer 1, 2, 3 Sampling rate: 8K-48kHz Bit rate: 8kbps-448kbps, VBR Sample Rate Converter All sample rates converted to 44.1kHz Serial Interface 3-wire (Clock, Data, Status) serial interface Playback commands: Play, Pause, Stop, FF, FB, Fol+, Fol-, +10, -10, Volume+, Volume-, Repeat, Random (BU9434-C2) Decoder status: Folder #, File #. Playback Time (Minute, Second), Folder Name, File Name (BU9434-C2), ID3TAG (Album, Artist, Title) (BU9434-C2), Ver. 1.0, 1.1, 2.2, 2.3, 2.4 Resume information and command (BU9434-C2) Key-matrix Controller (BU9434-C2 is 3x4) 2x4 key matrix control: Play/Pause, Stop, FF, FB, Fol+, +10, Volume+*, Volume-*, Repeat, Random (BU9434-C2) *Digital volume can be selected LED Controller Play (Pause = blinks) LED Error LED Memory access LED Sound Effecter (BU9434-C2) Pop / Jazz / Rock / Classic / R&B BassBoost / Surround DAC I2S / SPDIF interfaces supported (BU9434-C2) Total harmonic distortion: 0.03% Signal to noise ratio: 93dB Dynamic range: 88dB Headphone Amp: 14mW (RL32O) (BU9434-C2) Mute circuit control (外部链接,不予显示)news/pressreleasearchive/news2006.htm Audio system LSIs sound MP3 file playback (外部链接,不予显示)products/190500382 (外部链接,不予显示)index.php?q=BU9432&0=1&1=1&2=1&3=1&4=1&5=1&6=1&7=1&onsite=
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