Tokyo, Japan. May 9, 2008 - eSOL, a leading developer of realtime embedded software solutions, today announced the addition of an isochronous transfer mode and an Audio Class Driver to its PrUSB®/Host product. PrUSB/Host is a full and comprehensive embedded USB host protocol stack from eSOL that includes the low-level USB driver and multiple class drivers. The addition of the isochronous transfer mode along with the Audio Class Driver will allow USB host-based products such as car infotainment systems and navigation systems to receive audio streaming in realtime over the standard USB connection from portable music players.

Most portable MP3 players in the market today deploy the USB Mass Storage Class to connect and transfer data to host devices mainly with the so-called 2-wire approach. With the increasing trends to connect such portable music players to non-PC devices over the USB cable, realtime audio streaming, exchange of music metadata, and higher audio quality are required, therefore, the isochronous transfer mode and the Audio Class Driver have become a solid requirement in addition to the conventional HID Class Driver, which has been supported by PrUSB/Host.

In addition to PrUSB/Host, eSOL offers realtime operating systems, middleware and integrated development environments. These have all been seamlessly integrated in a single package that gives building block flexibility, to enable OEMs and ODMs to jump-start their development from consumer electronics to in-car entertainment systems products. Our software has been optimized for each platform we support, and supports leading embedded-processor architecture including ARM, MIPS, and Power Architecture.

"We see more OEMs and ODMs supporting portable music players in their audio products, ranging from home stereo to in-car entertainment systems." said Nobuyuki Ueyama, the Executive Vice President of eSOL Co., Ltd. "This portable music player phenomena will continue to expand, becoming a differentiating feature for many OEMs and ODMs. I am pleased that our embedded USB host software solutions can help OEMs and ODMs to shorten their development cycle as well as provide a reliable way to connect portable music players with our proven USB expertise. We have a number of world-leading consumer electronics vendors deploying our solutions in their end-products. "

About eSOL
Founded in 1975 in Tokyo, Japan, eSOL is a leading embedded software developer with core technologies in realtime operating systems. We develop, market and sell proven RTOS suites, along with a rich set of vertically-oriented middleware libraries. Our rugged software development tools provide optimal reliability in backing up the highly complicated development process for RTOS-based applications. We know that a reliable RTOS and development tools make a significant difference to the quality and timeliness of our customers’ products in a continuously growing and competitive world market. Today, our customers - global OEMs and ODMs ranging from consumer electronics to automotive applications - ship millions of products with technologies pioneered by eSOL.
For more information, please visit www.esol.com .

* PrUSB/Host is a registered trademark of eSOL Co., Ltd.
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