Semiconductor integrated circuit device
AssigneeHitachi, Ltd.
InventorHiroyuki Mizuno
Life of this patent
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Abstract
A semiconductor integrated circuit device for fast and low power operations, comprising a plurality of circuit blocks of a chip, each of which has a plurality of states with different power consumption values. A power management circuit determines the state of each of the circuit blocks so as not to exceed a maximum power consumption value of the semiconductor integrated circuit device by considering the power consumption of each circuit block and by each state transition in each circuit block. The maximum power consumption value may be preset or adjustable after fabrication.
Claims18
A semiconductor device having a predetermined maximum power consumption, comprising:
- a control circuit;
- and
- a plurality of first circuits,
- wherein each of the plurality of first circuits has a plurality of states, a degree of suppression of power consumption being different between each of the plurality of states, and
- further wherein the control circuit determines a schedule of the states of each of the plurality of first circuits so that a total power consumption of the semiconductor device does not exceed said predetermined maximum power consumption.
A power control method for controlling a power consumption of a semiconductor device, comprising the steps of:
- providing the semiconductor device including a control circuit and a plurality of first circuits, each of the plurality of first circuits having a plurality of states, a degree of suppression of power consumption being different between each of the plurality of states;
- and
- arranging a schedule of the states of each of the plurality of first circuits by the control circuit so that a total power consumption of the semiconductor device does not exceed a predetermined maximum power consumption.
Dependencies are inferred from the claim text.