US 8,751,991 B2 · Layout method, layout system, and non-transitory computer readable medium storing layout program of semiconductor integrated circuit

Abstract

A layout method of a semiconductor integrated circuit according to the present invention includes selecting M (M is an integer of two or larger and N or smaller) pieces of sequential circuits from N (N is an integer of three or larger) pieces of sequential circuits mounted on the semiconductor integrated circuit, a clock being distributed to the N pieces of sequential circuits from the same clock route; and replacing the M pieces of sequential circuits that are selected with one multi-data input/output sequential circuit including M pieces of input terminals and output terminals and one clock terminal that receives the clock distributed from the clock route.

Claims23

Dependent claims

A layout method of a semiconductor integrated circuit, comprising:

selecting, via a processor, M (M is an integer of two or larger and N or smaller) pieces of sequential circuits from N (N is an integer of three or larger) pieces of sequential circuits mounted on the semiconductor integrated circuit, a clock being distributed to the N pieces of sequential circuits from a same clock route;
and
replacing the M pieces of sequential circuits that are selected with a single multi-data input/output sequential circuit, having a single flip-flop, including M pieces of input terminals and output terminals and a single clock terminal that receives the clock distributed from the clock route.

A layout system of a semiconductor integrated circuit using a computer, the computer comprising:

a storage unit configured to store arrangement information of N (N is an integer of three or larger) pieces of sequential circuits mounted on the semiconductor integrated circuit, a clock being distributed to the N pieces of sequential circuits from a same clock route;
and
a control unit configured to execute layout of the sequential circuits in the semiconductor integrated circuit, wherein the control unit comprises:
a selection unit configured to select M (M is an integer of two or larger and N or smaller) pieces of sequential circuits from the N pieces of sequential circuits;
and
a replacement unit configured to replace the M pieces of sequential circuits that are selected with a single multi-data input/output sequential circuit, having a single flip-flop, including M pieces of input terminals and output terminals and a single clock terminal that receives a clock distributed from the clock route.

3 more elements

A non-transitory computer readable medium storing a layout program of a semiconductor integrated circuit that makes a computer execute processing including:

selection processing that selects M (M is an integer of two or larger and N or smaller) pieces of sequential circuits from N (N is an integer of three or larger) pieces of sequential circuits mounted on the semiconductor integrated circuit, a clock being distributed to the N pieces of sequential circuits from a same clock route;
and
replacement processing that replaces the M pieces of sequential circuits that are selected with a single multi-data input/output sequential circuit, having a single flip-flop, including M pieces of input terminals and output terminals and a single clock terminal that receives the clock distributed from the clock route.

Dependencies are inferred from the claim text.

Layout method, layout system, and non-transitory computer readable medium storing layout program of semiconductor integrated circuit

Life of this patent

Layout method, layout system, and non-transitory computer readable medium storing layout program of semiconductor integrated circuit

Life of this patent

Abstract

Claims23