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Audio codec targets MP3, WMA players

Posted: 06 Apr 2006 ?? ?Print Version ?Bookmark and Share

Keywords:AT85C51SND3? audio codec? Atmel?

Atmel Corp. announced the availability of the AT85C51SND3 single-chip audio codec for high-volume markets such as MP3/WMA music players, cellphones and car audio systems.

The AT85C51SND3 implements a dual-processor architecture with a proprietary DSP designed for audio processing and an 8bit 8051 processing core for controlling the user interface. The product can be used as a stand-alone player or inserted in a more complex system such as a cellphone or car audio system, in which case, an available high-speed parallel interface is able to connect to the baseband or host processors.

The code density and the performance of the audio DSP is said to allow the AT85C51SND3 to consume less than 35mA for a complete player in MP3 play mode. It supports digital music formats including MP3, WMA and OGG.

The product includes USB On-The-Go and OLED color screen control, and can support an OLED display with up to 320 x 256 pixels and 260,000 colors. In addition, the device allows audio playback from FM line-in or an digital audio processor to a volume controlled line-out or headphone amplifier. Recording in Wave or ADPCM format is also possible from line-in or microphone input.

Music can be played from NAND Flash, multimedia cards, Xd-Picture Card, Secure Digital Card or SmartMedia.

The AT85C51SND3 can operate at 1.8V, 3V or 5V and is available in three different options: the AT85C51SND3B1 standard version; the AT85C51SND3B2, which incorporates a 16bit audio DAC; and the AT85C51SND3B3, which integrates a DC/DC converter and a 16bit audio DAC.

Development tools are available to support the AT85C51SND3 and 8051 compilers can be used. The emulation can be done with On-Chip-Debug and Keil uVision. Atmel offers the AT85DVK-07, a development kit for $500, which includes a full-featured board and a library of firmware. The AT85RFD-07, a player reference design, is available for $150.

The AT85C51SND3 is available in BGA and QFP 100-pin packages or die in an industrial temperature range. Samples are now available. Mass production will start in June 2006.

The AT85C51SND3B1 standard version is priced at $4 for 100,000-unit quantities.

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