The SH-DSP is a hybrid 16-bit DSP/32-bit RISC microcontroller architecture from Hitachi, targeted at low-cost embedded applications. The SH-DSP is compatible with Hitachi's SH-2 microcontroller. The SH-DSP augments the SH-2 microcontroller architecture with a substantial array of fixed-point DSP-oriented instructions and features. These additions give the SH-DSP capabilities comparable to those of typical 16-bit DSPs. The SH-DSP is a single processor and processes a single instruction stream.

Green Hills' MULTI environment and optimizing compilers address every aspect of SH2-DSP software development, including source-level debugging, window-oriented editing, automated program building, execution profiling, and project/version control. Moreover, the Green Hills' optimizing compilers take full advantage of the SH2-DSP's ability to execute two instructions on each clock cycle.

Said Green Hills president Dan O'Dowd, "The SH2-DSP provides an excellent complement to the SH family at the high end. The dual- issue architecture delivers the performance needed to tackle high- end embedded applications, while the 16-bit fixed-length instructions and 800-Mbyte/sec data transfer rate enables embedded designers to take full advantage of available memory resources."

Added Hitachi Product Manager Dave Pelavin, "We're pleased to see Green Hills continue its support for the SH product line, which now includes the SH2-DSP and SH4. Green Hills' MULTI environment and optimizing compilers make it easy for embedded programmers to take full advantage of the SH2-DSP's advanced architecture."

The MULTI Development Environment and Green Hills compilers provide a uniform set of C, C++ and assembly language development capabilities that span Windows 95, Windows NT, and Unix host platforms. The heart of the MULTI environment is an RTOS-aware source-level debugger that features task- and system-level debug capabilities. The debugger also provides special support for C++ (including a Class Browser, object display and template debug capability) and X-Windows debugging.

MULTI's program builder, editor, and debugger are tightly integrated to offer quick, convenient single- and double-click transfers between debug mode and full source editing. For example, simply clicking on a compiler error message brings the user to the editor, opens the file containing the error, moves the cursor to the line containing the error, and highlights the error.

Green Hills' new scaleable C/C++ compiler lets programmers use switch options to select any subset of C++ they want, from bare bones C, to full-blown ANSI/ISO C++. The compiler also supports a new dialect of C++ known as Embedded C++ (EC++). Optimized for resource-constrained embedded applications, EC++ achieves the efficiency of C while preserving many of the best object-oriented features of C++.

Code that has been compiled for the SH2-DSP can run on the target hardware with Hitachi’s E10000 Emulator, a ROM Monitor, with a serial OCD interface, under Wind River Systems' VxWorks operating system, and under custom real-time operating systems.

For sales information on Green Hills Software's products, please call 1-800-500-2580 or email inquiries to sales@ghs.com.

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Incorporated in 1982, Green Hills Software, Inc., is a leading supplier of software development tools for 32- and 64-bit embedded systems. Green Hills offers a family of optimizing Ada, C, C++, FORTRAN and Pascal compilers. The company also offers a software development environment known as MULTI that automates the compile-edit-build-debug cycle by integrating advanced facilities such as an RTOS-aware source-level debugger, profiler, program builder and source code control system.

Green Hills' tools support all major advanced microprocessor families and target environments, including instruction set simulators, ROM Monitors, commercial and home grown real-time operating systems (RTOS) and in-circuit emulators (ICE).

Green Hills Software is headquartered in Santa Barbara, CA., and has offices in Lexington, MA., Raleigh, N.C., King of Prussia, PA, Chicago, IL, Dallas, TX, Palm Harbor, FL., Denver, CO, Scotts Valley, CA, Cupertino, CA, San Clemente, CA, Los Angeles, CA, Kent, U.K., Amsterdam, Netherlands, Munich, Germany and Paris, France.