Semiconductor integrated circuit and semiconductor integrated circuit manufacturing method
First Claim
1. A semiconductor integrated circuit comprising:
- a first circuit block that does not include a critical path;
a second circuit block that includes said critical path;
first power supply wiring that supplies a first power supply to said first circuit block; and
second power supply wiring that supplies a second power supply of higher voltage than said first power supply to said second circuit block.
1 Assignment
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Accused Products
Abstract
A low-power-consumption type semiconductor integrated circuit incorporating a variety of functions and a semiconductor integrated circuit manufacturing method are provided. As an example of a semiconductor integrated circuit, a system LSI 1 has first circuit blocks 41 through 48 that do not include a critical path, second circuit blocks 51 through 54 that include a critical path, first power supply wiring 25 that supplies a first power supply to first circuit blocks 41 through 48, and second power supply wiring 26 that supplies a second power supply of higher voltage than the first power supply to second circuit blocks 51 through 54, with second circuit blocks 51 through 54 being connected to second power supply wiring 26 by means of wiring areas 61 through 64 respectively, and being supplied with the second power supply.
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Citations
15 Claims
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1. A semiconductor integrated circuit comprising:
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a first circuit block that does not include a critical path;
a second circuit block that includes said critical path;
first power supply wiring that supplies a first power supply to said first circuit block; and
second power supply wiring that supplies a second power supply of higher voltage than said first power supply to said second circuit block. - View Dependent Claims (2, 3, 4, 12)
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5. A semiconductor integrated circuit comprising:
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basic cell rows in which a plurality of circuit blocks are placed, arranged in a plurality in a first direction;
a wiring placement area formed between adjacent said basic cell rows in said first direction;
reference power supply wiring that extends in a second direction in said wiring placement area and supplies a reference power supply to said circuit blocks;
first power supply wiring that extends in said second direction in said wiring placement area and supplies a first power supply of higher voltage than said reference power supply to said circuit blocks; and
second power supply wiring that extends in said second direction in said wiring placement area and supplies a second power supply of higher voltage than said first power supply to said circuit blocks. - View Dependent Claims (6, 7, 8, 13, 14)
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9. A semiconductor integrated circuit manufacturing method comprising:
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a step of placing first power supply wiring that supplies a first power supply and second power supply wiring that supplies a second power supply of higher voltage than said first power supply;
a step of placing a plurality of circuit blocks;
a step of connecting said plurality of circuit blocks to first power supply wiring;
a step of extracting a circuit block that includes a critical path among said plurality of circuit blocks; and
a step of replacing connection of said circuit block that includes a critical path to first power supply wiring with connection of said circuit block that includes a critical path to second power supply wiring. - View Dependent Claims (10, 11, 15)
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Specification