Cell arrangement evaluating method, storage medium storing cell arrangement evaluating program, cell arranging apparatus and method, and storage medium storing cell arranging program
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jul 10, 2001
Grant Date -
N/A
app pub date -
May 5, 1998
filing date -
Oct 23, 1997
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A cell arrangement evaluating method for predicting a wiring density based on only a cell arranging result prior to initiation of any wiring programs so as to easily perform wiring condition evaluation based on the wiring density within a short time. Two cells to be connected by wiring are selected, and a rectangular region is obtained in which the pins of the two cells to be connected are diagonal verfexes. The probability of wiring between the pins to be connected passing through a certain grid point of wiring grid is calculated. A proportion of the rectangular region occupying each evaluation unit grid is calculated, and then, for each evaluation unit grid, an index for an increase of a wiring density made by the factor of the wiring in the evaluation unit grid is calculated. Then, for each evaluation unit grid, the sum of indexes calculated for all the wiring lines among the cells as a wiring density in the evaluation unit grid is calculated. The cell arrangement evaluation method is used for designing an integrated circuit such an LSI or a circuit on a printed circuit board.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully