Z89462

The Z89462 is a high-performance Digital Signal Processor (DSP) optimized for processing and transferring data. This enhanced processor provides an upward migration path for its Z89C00/Z89321 predecessors.

The DSP provides three 12-bit Register Pointers for each RAM bank. These pointers may be incremented or decremented automatically to implement circular buffers without software overhead.

Three prioritized and individually maskable interrupts are provided for use by external peripherals requiring service from the DSP. The interrupt inputs can be individually conditioned for edge or level trigger. Acknowledgement of an activated interrupt occurs at the end of an instruction execution.

Two banks of 512 x 16-bit data RAM are available. Expansion of the on-chip data RAM is provided through future upgrades.

External interfaces include Address Bus and Data Bus for external Program Memory, Address Bus and Data Bus for external Data Memory, three vectored interrupt ports, and two input/two output user ports.