Rohm has single chip USB audio decoder

Desription

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.

Features

USB2.0 Full Speed host I/F function contained.

• ・ SD card I/F function contained.
• ・ I2C format I/F function contained.
• ・ Protocol conversion from I2C to USB HID or from USB HID to I2C. *1
• ・ MP3 encode function contained. *2,*3,*10
• ・ MP3 decode function contained. *4
• ・ WMA decode function contained. *5
• ・ AAC decode function contained. *6,*7
• ・ WAV format file playing function contained. *7
• ・ Sample Rate Converter contained. *8
• ・ System Controller contained.
• ・ FAT analysis function contained.
• ・ CD-ROM I/F function and CD-ROM decoder function contained.
• ・ Browsing function of File Names, Folder Names on music playing contained.
• ・ ID3TAG and WMATAG and AACTAG Analysis.
• ・ Fast forward/backward playing function contained.
• ・ Resume function contained.
• ・ File data Reading/Writing function contained.
• ・ Program download function from external serial Flash ROM contained.USB2.0 Full Speed host I/F function contained.
• ・ SD card I/F function contained.
• ・ I2C format I/F function contained.
• ・ Protocol conversion from I2C to USB HID or from USB HID to I2C. *1
• ・ MP3 encode function contained. *2,*3,*10
• ・ MP3 decode function contained. *4
• ・ WMA decode function contained. *5
• ・ AAC decode function contained. *6,*7
• ・ WAV format file playing function contained. *7
• ・ Sample Rate Converter contained. *8
• ・ System Controller contained.
• ・ FAT analysis function contained.
• ・ CD-ROM I/F function and CD-ROM decoder function contained.
• ・ Browsing function of File Names, Folder Names on music playing contained.
• ・ ID3TAG and WMATAG and AACTAG Analysis.
• ・ Fast forward/backward playing function contained.
• ・ Resume function contained.
• ・ File data Reading/Writing function contained.
• ・ Program download function from external serial Flash ROM contained.

Rohm has developed a USB audio decoder IC which will provide audio playback of MP3 files from CD-ROM and USB memory using just a single chip.

As USB and SD memory cards become the de facto storage medium for audio and multimedia files. Rohm has a range of single-chip USB audio decoders for different file formats.

The BU94702AKV has a USB/SD memory card host functionality, MP3/AAC/WMA decoder, FAT file system, and a music search function (file browser) that allows track selection during playback.

Also, built-in LDO and DAC circuits are designed to simplify configuration of an audio system by supporting direct connection to power supply audio amp, and speakers.

The device is availabel in a VQFP80 package.

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