MC68040FE25A Datasheet - Freescale Semiconductor

INTRODUCTION
   The MC68040, MC68040V, MC68LC040, MC68EC040, and MC68EC040V (collectively called M68040) are Motorola’s third generation of M68000-compatible, high-performance, 32-bit microprocessors. All five devices are virtual memory microprocessors employing multiple concurrent execution units and a highly integrated architecture that provides very high performance in a monolithic HCMOS device. They integrate an MC68030-compatible integer unit (IU) and two independent caches. The MC68040, MC68040V, and MC68LC040 contain dual, independent, demand-paged memory management units (MMUs) for instruction and data stream accesses and independent, 4-Kbyte instruction and data caches. The MC68040 contains an MC68881/MC68882-compatible floatingpoint unit (FPU). 

FEATURES
The main features of the M68040 are as follows:
• 6-Stage Pipeline, MC68030-Compatible IU
• MC68881/MC68882-Compatible FPU
• Independent Instruction and Data MMUs
• Simultaneously Accessible, 4-Kbyte Physical Instruction Cache and 4-Kbyte Physical Data Cache
• Low-Latency Bus Accesses for Reduced Cache Miss Penalty
• Multimaster/Multiprocessor Support via Bus Snooping
• Concurrent IU, FPU, MMU, and Bus Controller Operation Maximizes Throughput
• 32-Bit, Nonmultiplexed External Address and Data Buses with Synchronous Interface
• User Object-Code Compatible with All Earlier M68000 Microprocessors
• 4-Gbyte Direct Addressing Range
• Software Support Including Optimizing C Compiler and UNIX® System V Port