MC68EC040V
MC68EC040V is Microprocessor manufactured by Motorola Semiconductor.
- Part of the MC68EC040 comparator family.
- Part of the MC68EC040 comparator family.
features of the MC68EC040 include:
- MC68040-patible Integer Execution Unit
- 4-Kbyte Instruction Cache and 4-Kbyte Data Cache Accessible Simultaneously
- 32-Bit, Nonmultiplexed External Address and Data Buses with Synchronous Bursting Interface
- User-Object-Code patible with All M68000 Microprocessors
- Concurrent Integer Unit, ACU, and Bus Controller Operation Maximizes Throughput
- Low-Latency Bus Accesses for Reduced Cache-Miss Penalty
- Multimaster/Multiprocessor Support via Bus Snooping
- 4-Gbyte Direct Addressing Range w w
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M68040 USER’S MANUAL w w w
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B-1
MC68EC040 REV2.2 (11/02/99)
Figure B-1. MC68EC040 Block Diagram With the exception of the memory management unit (MMU), the floating-point unit (FPU), and their respective registers, the MC68EC040 programming model, data formats and types, instruction set (except all instructions beginning with an “F”, PTEST, and PFLUSH), and caches are the same as described in Section 1 Introduction for the MC68040. Figures B-2 and B-3 illustrate the programming model and functional signal groups for the MC68EC040.
B.1 MC68EC040 DIFFERENCES
The following differences exist between the MC68EC040 and MC68040:
- Two independent access control units (ACUs) replace the MC68040 MMUs. The ACU has four corresponding registers (access control registers) that the...
