Programmable controller

Details Programmable controller Programmable controller

1996-09-27

1999-08-03

Maung, Zarni

395376, G06F 1578

Patent

active

059336510

ABSTRACT:
A programmable controller includes a pipeline stage having a first stage IF for executing instruction fetching operations, a second stage ID/RF for decoding the instruction and for fetching data from a general-purpose register, a third stage EX for executing arithmetic and logic operations, data address calculations, or calculation of the effective address of a target branch, a fourth stage MEM for accessing to data memory, and a fifth stage WB/BPU for executing bit operations, writing operations with respect to the general-purpose register, or branching operations, are executed in a pipelined manner. Simplification of hardware and control, and facilitation of formation of a pipeline into multiple stages are realized as a result of a pipeline structure being formed into a unified instruction structure.

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William Stallings, Ph.D., Computer Organization and Architecture Principles of Structure and Function, 2nd ed., MacMillan Pub. Co., pp. 374-381, Dec. 1990.

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