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INTRODUCTION

The IDT R3051 family is a series of high-performance 32-bit microprocessors featuring a high-level of integration, and targeted to high-performance but cost sensitive processing applications. The R3051 family is designed to bring the highperformance inherent in the MIPS RISC architecture into low-cost, simplified, power sensitive applications.

FEATURES

? Instruction set compatible with IDT79R3000A, R3041, R3051, and R3071 RISC CPUs

? High level of integration minimizes system cost

— R3000A Compatible CPU

— R3010A Compatible Floating Point Accelerator

— Optional R3000A compatible MMU

— Large Instruction Cache

— Large Data Cache

— Read/Write Buffers

? 43VUPS at 50MHz

— 13MFlops

? Flexible bus interface allows simple, low cost designs

? Optional 1x or 2x clock input

? 20 through 50MHz operation

? V version operates at 3.3V

? 50MHz at 1x clock input and 1/2 bus frequency only

? Large on-chip caches with user configurability

— 16kB Instruction Cache, 4kB Data Cache

— Dynamically configurable to 8kB Instruction Cache, 8kB Data Cache

— Parity protection over data and tag fields

? Low cost 84-pin packaging

? Superset pin- and software-compatible with R3051, R3071

? Multiplexed bus interface with support for low-cost, lowspeed memory systems with a high-speed CPU

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

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

? On-chip DMA arbiter

? Hardware-based Cache Coherency Support

? Programmable power reduction mode

? Bus Interface can operate at half-processor frequency