INTRODUCTION

The IDT RISController family is a series of high-performance 32-bit microprocessors featuring a high-level of integration, and targeted to high-performance but cost sensitive embedded processing applications. The RISController family is designed to bring the high-performance inherent in the MIPS RISC architecture into low-cost, simplified, power sensitive applications.

FEATURES:

? Instruction set compatible with IDT79R3000A and RISController Family MIPS RISC CPUs

? High level of integration minimizes system cost

— RISC CPU

— Multiply/divide unit

— Instruction Cache

— Data Cache

— Programmable bus interface

— Programmable port width support

? On-chip instruction and data caches

— 2KB of Instruction Cache

— 512B of Data Cache

? Flexible bus interface allows simple, low-cost designs

— Superset pin-compatible with RISController

— Adds programmable port width interface (8-, 16-, and 32-bit memory sub-regions)

— Adds programmable bus interface timing support (Extended address hold, Bus turn around time, Read/write masks)

? Double-frequency clock input

? 16.67MHz, 20MHz, 25MHz and 33MHz operation

? 20MIPS at 25MHz

? Low cost 84-pin PLCC packaging

? On-chip 4-deep write buffer eliminates memory write stalls

? On-chip 4-word read buffer supports burst or simple block reads

? On-chip DMA arbiter

? On-chip 24-bit timer

? Boot from 8-bit, 16-bit, or 32-bit wide PROMs

? Pin- and software-compatible family includes R3041, R3051, R3052?, and R3081?

? Complete software support

— Optimizing compilers

— Real-time operating systems

— Monitors/debuggers

— Floating Point emulation software

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