| 摘要 |
The object of the present invention is that a composite storage circuit capable of executing a writing operation and reading operation at high speed is provided, and as the result of that, a semiconductor apparatus capable of realizing an instant-on function and instant-off function is provided. <??>The composite storage circuit is constituted of a volatile storage circuit and a non-volatile storage circuit connected in parallel, and same information as storage information in the volatile storage circuit is stored in the non-volatile storage circuit. Moreover, as a power supply to the volatile storage circuit decreases, storage information in the volatile storage circuit is written in the non-volatile storage circuit. Further, after a power failure or a decreased power supply, returning storage information from the non-volatile storage circuit to the volatile storage circuit upon restart of power feeding. Further, a semiconductor apparatus constituted by having the composite storage circuit described above. <IMAGE>
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