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