DATA PROCESSOR HAVING A VARIABLE NUMBER OF PIPELINE STAGES

摘要

The data processing apparatus of the present invention includes processing means for pipeline processing an instruction in any one of n stages or m stages, and the pipeline stages of the pipeline stages of the n stages and the m stages larger than n stages, and the pipeline stages of the processing means. And a switching means for making a telephone call, wherein the switching means executes the processing means in n stages when in the first operating environment, and executes the processing means in m stages when in the second operating environment. Whether it is in the said 1st operating environment or a 2nd operating environment is distinguished according to any one of the frequency of the operation clock supplied to a data processing apparatus, and the power supply voltage supplied to a data processing apparatus. As a result, it is possible to provide a cost-effective data processing device that exhibits appropriate processing power even when using a high speed clock or a low speed clock, depending on the application.