| 摘要 |
A digital signal processor which can reduce the electric power consumption in a fine manner according to the contents of processing to be executed. An arithmetic device performs arithmetic operations according to operation instructions. A storage device stores plural sets of the operation instructions and control instructions corresponding to respective ones of the operation instructions and indicative of kinds of processings to be executed according to the respective ones of the operation instructions. A control device is disposed to receive an externally supplied control signal indicative of kinds of processings to be executed by the digital signal processor, and reads out the operation instructions and the control instructions corresponding to the respective ones of the operation instructions and renders the arithmetic device inoperative when a kind of processing indicated by the control signal and a kind of processing indicated by each of the control instructions read out do not coincide with each other.
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