M68040用户手册(附录B)

The MC68EC040 is Motorola's third generation of M68000-compatible, high-performance,
32-bit microprocessors. The MC68EC040 is an embedded controller employing a highly
integrated architecture to provide very high performance in a monolithic HCMOS device. The
MC68EC040 integrates an MC68040-compatible integer unit, an access control unit (ACU),
and independent 4-Kbyte instruction and data caches. A six-stage instruction pipeline, multiple internal buses, and a full internal Harvard architecture, including separate caches for
both instruction and data accesses, provides a high degree of instruction execution parallelism. The inclusion of on-chip bus snooping logic, which directly supports cache coherency in multimaster applications, enhances cache functionality.