Z89321

` 0 to +70 Standard Temperature Range
  -40 to +85 Extended Temperature Range
` 4.5- to 5.5-Volt Operating RangeDSP Core
` 24 MIPS @ 24 MHz Maximum, 16-Bit Fixed Point DSP
` 41.7 ns Minimum Instruction Cycle Time
` Six-Level Hardware Stack
` Six Register Address Pointers
` Optimized Instruction Set (30 Instructions)
` Dual 8/16-Bit CODEC Interface Capable of up to10 Mbpsnm
 -Law Compression Option(Decompression is Performed in Software)
`16-Bit I/O Bus (Tri-Stated)
` Three I/O Address Pins (Latched Outputs)
` Wait-State Generator
` Three Vectored Interrupts
`13-Bit General-Purpose Timer

The Z89321 products are high-performance Digital Signal Processors (DSPs) with a modified Harvard-type architecture featuring separate program and data memory. The design has been optimized for processing power while minimizing silicon space.

The single-cycle instruction execution and bus structure promotes efficient algorithm execution, while the six register pointers provide circular buffering capabilities and dual operand fetching.

Three vectored interrupts are complemented by a six-level stack, and the CODEC interface allows high-speed transfer rates to accommodate digital audio and voice data.

A dedicated Counter/Timer provides the necessary timing signals for the CODEC interface, and an additional 13-bit timer is available for general-purpose use.

The Z893XX DSPs are optimized to accommodate advanced signal processing algorithms. The 24 MIPS (maximum) operating performance and efficient architecture provides real-time instruction execution. Compression, filtering, frequency detection, audio, voice detection/synthesis, and other vital algorithms can all be accommodated.

The Z89321/371/391 devices feature an on-board CODEC interface, compatible with 8-bit PCM and 16-bit CODECs for digital audio applications. Additionally, an onboard wait-state generator is provided to accommodate slow external peripherals.

For prototypes, as well as production purposes, the Z89371 member of the DSP product family is a one-time pro-grammable (OTP) device with a 16 MHz maximum operating frequency.