Semiconductor device and electronic device
AssigneeFujitsu Limited
InventorsJun Iwata, Shoji Taniguchi, Koichi Kuroiwa, Yoshikazu Yamada
Life of this patent
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Abstract
A semiconductor device that quickly saves data stored in an area to which power is supplied intermittently. Power is supplied intermittently to a first area. Power is supplied continuously to a second area. A memory is located in the second area. A save circuit saves data used in the first area in the memory before the supply of power being stopped. A restoration circuit restores data which has been saved in the memory to a predetermined circuit in the first area. A power supply control circuit supplies power to the memory if data has been saved in the memory. Otherwise the power supply control circuit stops the supply of power to the memory.
Claims6
A semiconductor device including a first area to which power is supplied intermittently and a second area to which power is supplied continuously, the device comprising:
- a memory located in the second area;
- a save circuit for saving data used in the first area in the memory before the supply of power being stopped;
- and
- a restoration circuit for restoring data which has been saved in the memory to a predetermined circuit in the first area.
An electronic device including a first circuit to which power is supplied intermittently and a second circuit to which power is supplied continuously, the device comprising:
- a memory located in the second circuit;
- a save circuit for saving data used in the first circuit in the memory before the supply of power being stopped;
- and
- a restoration circuit for restoring data which has been saved in the memory to a predetermined portion in the first circuit.
Dependencies are inferred from the claim text.