Method and device for designing semiconductor integrated circuit
AssigneeFreescale Semiconductor, Inc.
InventorKenichi Watanabe
Life of this patent
Estimating the term…
Abstract
A method and device for designing a semiconductor integrated circuit that easily reduces off leakage current. Wires connected to input terminals of a standard cell are exchanged with one another and a gate net list is changed so as to reduce off leakage current in accordance with a net probability and a current consumption table. The net probability is the probability of the state an input of the standard cell can take and is generated through an RTL function simulation and a gate level function simulation. The current consumption table is stored in a technology library storage.
Claims8
A computer readable medium including a computer program, wherein the computer program performs a method for designing a semiconductor integrated circuit reducing off leakage current of a standard cell used to form the semiconductor integrated circuit, the standard cell provided with a library of off leakage current corresponding to a state of an input to each of a plurality of input terminals of the standard cell, the method comprising the steps of:
- generating a net probability for each input terminal of the standard cell, wherein the net probability is the probability of the state an input to each input terminal can take;
- and
- exchanging wires connected to the input terminals of the standard cell with one another based on the net probability and the library so as to reduce the off leakage current.
A device for designing a semiconductor integrated circuit reducing off leakage current of a standard cell forming the semiconductor integrated circuit, the standard cell provided with a library of off leakage current corresponding to the state of an input to each of a plurality of input terminals of the standard cell, the device comprising:
- a probability generation means for generating a net probability for each input terminal of the standard cell, wherein the net probability is the probability of the state an input to each input terminal can take;
- and
- an exchanging means for exchanging wires connected to the input terminals of the standard cell with one another based on the net probability and the library so as to reduce the off leakage current.
Dependencies are inferred from the claim text.