Z89390

The Z89390 is a CMOS Digital Signal Processor (DSP). Single-cycle instruction execution and a Harvard bus structure promotes efficient algorithm execution. The processor contains 512 word data RAM and 64K word of external program address space is accessible. Six register pointers provide circular buffering capabilities and dual operand fetching. Three vectored interrupts are complemented by a six level stack. The CODEC interface enables high-speed transfer rates to accommodate digital audio and voice data. A dedicated Counter/Timer provides the necessary timing signals for the CODEC interface. An additional 13-bit timer is available for general-purpose use.

The Z89390 is optimized to accommodate intricate signal processing algorithms. The 20-MIP operating performance and efficient architecture provides real-time execution. Compression, filtering, frequency detection, audio, voice detection/synthesis and other available algorithms can all be accommodated. The on-board peripherals provide additional cost advantages.

Development tools for the IBM PC include a relocatable assembler, a linker loader debugger.