1. Introduction
1.4 R4000 Processor Configurations
The R4000 processor*1 is packaged in three different configurations. All processors are implemented in sub-1-micron CMOS technology.
- R4000PC is designed for cost-sensitive systems such as inexpensive desktop systems and high-end embedded controllers. It is packaged in a 179-pin PGA, and does not support a secondary cache.
- R4000SC is designed for high-performance uniprocessor systems. It is packaged in a 447-pin LGA/PGA and includes integrated control for large secondary caches built from standard SRAMs.
- R4000MC is designed for large cache-coherent multiprocessor systems. It is packaged in a 447-pin LGA/PGA and, in addition to the features of R4000SC, includes support for a wide variety of bus designs and cachecoherency mechanisms.
Table 1-1 lists the features in each of the three configurations (X indicates the feature is present). R4400 processor enhancements are described in the section following.
Copyright 1996, MIPS Technologies, Inc. -- 21 MAR 96
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