Design of Multi-mode Processor for Embedded Application

Based on 32 bit single-issue processor RISC3201, a multi-mode processor RISC3203 was designed to satisfy requirements of different embedded applications. RISC3203 could operate with three modes: dual-issue mode, dual-core mode and dual-thread mode. During the design, the IP reuse methodology was adopted into mixing the micro-architecture of multiple modes. The thread switch with low cost was implemented. Comparing with RISC3201, the performance of RISC3203 improved 70~80%, while the gate cost of pipeline increased 105%.

1. INTRODUCTION

The key processing unit in an embedded system is usually a single-issue RISC processor. With the rapid development of networks and media technologies, the computation of embedded applications is more complex. In order to meet requirements of embedded application, the performance of the single-issue processor should be improved.