JPH0528225A - Interactive wiring correction system - Google Patents

Abstract

PURPOSE:To prevent the occurrence of new violation wiring owing to the correction of violation wiring. CONSTITUTION:Current wiring information is stored in a wiring information storage means 1. A wiring state display means 2 displays a current wiring state by using this information. Here, a designer designates wiring being a correction object. A wiring length calculation means 3 obtains a current wiring length for the designated wiring, and an allowance wiring length calculation means 4 calculates an allowance wiring length. Furthermore, a wiring length margin degree display means 5 displays the ratio of the obtained current wiring length and the allowance wiring length (current wiring length/allowance wiring length X10). The designer does not come to select wiring with little margin degree of the wiring length and recognizes the margin degree of a noticed wiring route so as to alter the route. At the time of correction, a wiring route correction means 6 corrects designated wiring.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an interactive wiring correction method, and more particularly to an interactive wiring correction method for layout design of wiring including an LSI and a printed circuit board.

[0002]

2. Description of the Related Art When a wiring layout is designed, a delay analysis may be performed after the wiring process, and as a result, there may be a wiring that does not satisfy the delay time due to a long wiring length. further,
If an attempt is made to modify the wiring route so that the length of the violating wiring becomes shorter, it may be necessary to change the route of other non-violating wiring.

The correction state of the conventional conversational wiring correction method in such a case will be described with reference to the drawings.

FIG. 2 is a wiring route diagram showing the current wiring state.

Here, the wiring route 21 is a wiring route between the terminals 11 and 12, the wiring route 22 is a wiring route between the terminals 13 and 14, and the wiring route 23 is a wiring route between the terminals 15 and 16. As it is, the wiring length of the wiring route 21 is long and the delay time condition is not satisfied. Therefore, a case of correcting the wiring route will be described as an example.

In order to shorten the wiring length of the wiring path 21,
As a result of attempting to correct the wiring route 21, it is necessary to change the wiring route 22 or the wiring route 23.

In the conventional conversational wiring correction method, it is up to the designer to decide which wiring path should be changed. Therefore, the wiring path 22 may be selected. At this time, it cannot be judged whether the selection is good or bad.

As a result of the correction, the wiring route 22 replaces the wiring route 42 and the wiring route 21 replaces the wiring route 41 as shown in the wiring route diagram showing the changed wiring state in FIG. become.

[0009]

In the conventional conversational wiring correction method described above, in the conventional conversational wiring correction method, when there are a plurality of wirings that can be changed, the wiring route of which wiring is changed. It is up to the designer to decide whether or not it is appropriate. For this reason, if there is no margin compared with the allowable wiring length of the selected wiring, there is a problem that the wiring length becomes long due to the change of the wiring route, and it becomes a new violating wiring.

In the case of the above example, the wiring route 22 to be route-changed is arbitrarily selected by the designer, so that the current wiring length is compared with the allowable wiring length. In some cases, there is no room. At this time, the designer
Since this lack of margin is not recognized, the changed wiring path 42 exceeds the allowable wiring length, and a new violating wiring is created.

It is an object of the present invention to provide a conversational wiring correction method capable of preventing the occurrence of a new violation wiring caused by the correction of the violation wiring.

[0012]

A conversational wiring correction method of the present invention is a conversational wiring correction method for a layout design of a wiring including an LSI and a printed circuit board, and wiring information storage means for storing information about the wiring, Wiring status display means for displaying the status of the wiring, wiring path correction means for correcting the wiring path, wiring length calculation means for calculating the current wiring length of a designated arbitrary wiring, and the designated A permissible wiring length calculating means for calculating a permissible wiring length which is a wiring length allowed for an arbitrary wiring to satisfy a delay time condition, and the current wiring based on the obtained current wiring length and the permissible wiring length. The wiring length margin display means for calculating and displaying the long margin and the control means for controlling the respective means are provided.

[0013]

Embodiments of the present invention will now be described with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of the present invention.

According to the interactive wiring correction method of the present invention, the wiring information storage means 1 for storing information about the current wiring, the wiring status display means 2 for displaying the status of the wiring, and the current status of the designated arbitrary wiring. Wiring length calculation means 3 for calculating the wiring length
From the allowable wiring length calculation means 4 for calculating the allowable wiring length which is the wiring length allowed for the specified arbitrary wiring to satisfy the delay time condition, and the obtained current wiring length and allowable wiring length. The wiring length margin display means 5 for calculating and displaying the margin of the current wiring length, the wiring route correcting means 6 for correcting the wiring route, and the control means 7 for controlling each means are executed.

Next, the operation will be described.

First, the current wiring information is stored in the wiring information storage means 1. Using this information, the wiring status display means 2 displays the current wiring status.

Here, the designer specifies the wiring to be modified. With respect to the designated wiring, the wiring length calculating means 3 obtains the current wiring length, and the allowable wiring length calculating means 4 calculates the allowable wiring length. Further, the wiring length margin display means 5 displays the obtained ratio of the present wiring length to the allowable wiring length (current wiring length / allowable wiring length × 100).
From this display, the designer determines whether or not to modify the designated wiring. When making a correction, the wiring route correcting means 6 corrects the designated wiring. When no correction is made, the designated wiring is canceled.

Hereinafter, the above procedure is repeated until all wiring corrections are completed.

A case where the above operation is applied to FIG. 2 described in the prior art will be described.

In the conversational wiring correction method of the present invention, when the wiring change target for shortening the wiring length of the wiring path 21 which does not satisfy the delay time is selected from the wiring paths 22 and 23, the wiring is changed. When the routes 22 and 23 are designated, the wiring length margins are displayed as 90% and 50%, respectively. The designer can select a wiring path 23 having a sufficient wiring length by looking at this display. Therefore, the correction result is
As shown in the wiring route diagram showing the changed wiring state in FIG. 3, the wiring route 23 becomes the wiring route 33, and the wiring route 21 becomes the wiring route 31. When changing the wiring route 23, the designer recognizes the margin of the wiring length and makes the change, so that the changed wiring route 33 does not satisfy the delay time.

[0022]

As described above, according to the present invention, the current wiring length and the allowable wiring length of the wiring designated by the designer are calculated, and the margin of the wiring length is displayed to allow the designer to perform wiring. There is no need to select wiring with a long margin,
Moreover, since it is possible to change the route by recognizing the margin of the focused wiring route, it is caused by the correction of the violating wiring.
This has the effect of preventing the occurrence of new violating wiring.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention.

FIG. 2 is a wiring route diagram showing a current wiring state.

FIG. 3 is a wiring route diagram showing a wiring state after the change of the present invention.

FIG. 4 is a wiring route diagram showing a wiring state after the conventional interactive wiring correction method is changed.

[Explanation of symbols]

 1 Wiring Information Storage Means 2 Wiring Status Display Means 3 Wiring Length Calculation Means 4 Allowable Wiring Length Calculation Means 5 Wiring Length Margin Display Means 6 Wiring Path Correction Means 7 Control Means 21, 22, 23, 31, 33 Wiring Paths

Claims (1)

Claim: What is claimed is: 1. In a conversational wiring correction method for a layout design of wiring including an LSI and a printed circuit board, wiring information storage means for storing information about the wiring, and wiring for displaying a state of the wiring. Status display means, wiring route correction means for correcting the wiring route, wiring length calculation means for calculating the current wiring length of a designated arbitrary wiring, and the designated arbitrary wiring sets a delay time condition. Allowable wiring length calculating means for calculating an allowable wiring length which is an allowable wiring length for satisfying, and calculating and displaying a margin of the current wiring length from the obtained current wiring length and the obtained allowable wiring length. An interactive wiring correction system characterized by comprising: a wiring length allowance display means for controlling and a control means for controlling the respective means.