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IrDA device provides 16Mbps speed

Posted: 31 May 2005 ?? ?Print Version ?Bookmark and Share

Keywords:sigmatel? stir4230? very fast infrared? vfir? stir4231?

SigmaTel Inc. unveiled its STIR4230 Very Fast Infrared (VFIR) companion chip that provides 16Mbps wireless communication to SigmaTel-based portable MP3 player designs and other portable device and embedded applications.

"The STIR4230 differs from previous SigmaTel IrDA devices in that it is designed for use in portable and other embedded applications and not only as a PC peripheral," said Phil Pompa, CP of the Integrated Products Group at SigmaTel. "The product, with VFIR speeds, is the ideal method of transferring digital music and photos between portable devices."

With initial applications targeted for implementation within SigmaTel STMP35xx MP3 player solutions, the STIR4230 will also be available for non-music applications such as cellphones, digital still cameras, in-store kiosks and printers.

As one of the fastest wireless transfer methods, SigmaTel said, VFIR can transfer a single 3MB file in approximately 2s or 100MB of information in under 1.5 mins. As a point-to-point communications method, it is one of the most secure wireless technologies and is virtually immune to wireless hacking common with RF wireless technologies.

The STIR4230 interfaces to the host process via a simple Serial Peripheral Interconnect (SPI), and provides IrDA (Infrared Data Association) compatible protocol processing for all IrDA data rates from SIR (Serial Infrared) to VFIR, including MIR (Medium Infrared) and FIR (Fast Infrared).

Housed in a 4-by-4mm QFN package, the STIR4230 is sampling at $5.95 in quantities of 1,000. The STIR4231 is a pin compatible part that supports IrDA rates up to FIR (4 million bits per second).

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