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