USB Audio Decoder ICs - BU94501AMUV | ROHM Semiconductor - ROHM Co., Ltd. - global
USB Audio Decoder ICs - BU94501AMUV
ROHM's USB Audio Decoder ICs integrate a USB 2.0 host, SD memory card controller, AAC decoder, WMA decoder, MP3 decoder, Audio DAC amp, and a system controller all on a single chip, allowing easy playback of music stored in USB flash memory using an audio player. They can be easily added to virtually any audio device (i.e. CD player, mini-component stereo, portable player, car stereo) for greater functionality.
Digital Audio I/F
USB2.0 Full Speed
MMC SD / miniSD / microSD / SDHC
Number(Folder, File), Reproduction time, Name(Folder, File), Tag(Artist, Album, Title)
MPEG 1, 2, 2.5 LAYER 1, 2, 3
Operating Temperature (Min.)[°C]
Operating Temperature (Max.)[°C]
Features:・This LSI is an IC which integrates the WAV/AAC/WMA/MP3 decoder with built-in USB host
interface, SD memory card interface, audio DAC, system control functions and
internal CORE power supply regulator circuit.
・All the operations, from read of AAC/WMA/MP3/WAV files written in a memory device
having the USB interface or a SD card to output of these to an audio system using
KEY or I²C interface commands, are integrated in a single chip.
・The LSI supports external operations in stand-alone mode, which uses a command from
the KEY input configured using the key matrix (hereinafter referred to as MODE1)
and in slave mode, which uses a command from the master microcomputer using
the built-in I²C interface (hereinafter referred to as MODE2). Select either MODE1
or MODE2 at power ON.
・The LSI supports fast-forward and rewind playing functions.
・The LSI supports browsing function for other file name and direct select play while
playing the current music. *This is available in MODE2 only.
・The LSI supports output of the information on folder names, file names, ID3TAG
(V1.0, V.1,1, V2.2, V2.3, V2.4), WMA-TAG and AAC-TAG (iTunes, 3GP Meta-data)
via the I²C slave interface. *This is available in MODE2 only.
・The LSI supports the audio line output, digital audio serial 3-line (I2S, EIAJ) output and
digital audio interface (SPDIF) output.
・The IC allows reading from the specified file data within the memory. *This is available in