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Davis, CA – Rabbit Semiconductor, Inc. has announced the Rabbit 4000 as the newest addition to their line of low-EMI microprocessors.

The Rabbit 4000, like its predecessors, is designed specifically for embedded control, communications, and Ethernet connectivity. Rabbit 4000 brings forth new and improved features which make it a clear choice for today’s demanding embedded applications.

Rabbit 4000 Block Diagram

Building upon the highly successful Rabbit 3000, the Rabbit 4000 is offered in two RoHS compliant packages, 128-pin TQFP and 128-pin TFBGA configurations. The new features include:

• 500 new instructions
• Integrated 10Base-T Ethernet
• DMA
• Full 16-bit memory device support
• Page-mode memory device support
• Memory enhancements with physical address space of up to 16 MB
• New hardware security features
• Hardware breakpoints
• Improved I/O
• Variable-phase PWM

Programming the Rabbit 4000 microprocessor is simple with the industry-proven Dynamic C® software development system. In addition, Rabbit developers do not need costly in-circuit emulators — programming is accomplished simply by connecting an interface cable from a PC to a Rabbit-based target system. Software development and debugging can be performed over Ethernet/Internet using appropriate accessory hardware or RabbitSys. Integrated features of the Rabbit 4000 allow embedded engineers to develop smaller designs, enabling for diverse implementation.

The Rabbit 4000 will be available in quantity March 2006.

Rabbit Semiconductor
Rabbit Semiconductor, a Digi International® company (NASDAQ:DGII), is a global provider of high-performance 8-bit microprocessors and development tools for embedded control, communications, and Ethernet connectivity. A sister division of single-board computer and software manufacturer Z-World, Rabbit Semiconductor introduced the popular Rabbit 2000® microprocessor in 1999 and the Rabbit 3000® in 2002. The industry award-winning RabbitCoreTM line of microprocessor core modules was introduced in 2001. Rabbit Semiconductor offers customers a complete embedded design system, including low-cost development kits and comprehensive technical support for both hardware and software issues. Rabbit Semiconductor is a member of the Fabless Semiconductor Association and is located in Davis, Calif., 70 miles east of San Francisco.