JPH03163667A - Circuit diagram display method for lsi design - Google Patents

Abstract

PURPOSE:To discriminate the information of the number of bundle lines by a display by allowing the bundle line of a logic circuit diagram editor to have width or a color corresponding to the number of signal lines in the bundle line. CONSTITUTION:A bundle line 4 having eight pieces of signal lines, a bundle line 5 having five pieces of signal lines, and a bundle line 6 having three pieces of signal lines are displayed by thickness in accordance with the number of signal lines at every line kind. Or they are displayed in each separate color corresponding to the number of signal lines at every line kind. In such a way, by only looking at the circuit diagram, the number of signal lines of the bundle line is known, and at the time of connecting plural bundle lines in which the number of signal lines is different from each other, their trunk/branch relation can be discriminated immediately.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a circuit diagram display method used in a logic design support system.

[Conventional technology]

Conventionally, the method of representing bundled lines on this type of logic circuit diagram editor was to have a fixed width regardless of the number of signal lines in the bundled line. It was supposed to be displayed in color.

FIG. 4 is a layout diagram showing a method of describing bundled lines in a conventional logic circuit diagram editor. l is a bundled line with 8 signal lines, 2 is a bundled line with 5 signal lines, and 3 is a bundled line with 3 signal lines, all of which are displayed with the same width and the same color. .

[Problem to be solved by the invention]

The method of representing bundled lines in the conventional logic circuit diagram editor described above is to display all bundled lines 1 regardless of the number of signal lines in the bundled
~3 are displayed with a fixed width and color, so the number of signal lines in the bundle cannot be instantly determined. Therefore, when connecting multiple bundled wires with different numbers of signal wires, in order to know the number of signal wires in those bundled wires, it is necessary to extract and examine the part that describes the bundled wire information, which takes more man-hours. There were drawbacks.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method for displaying a circuit diagram for LSI design, which eliminates such drawbacks and allows information on the number of bundled wires to be identified by display. [Means for Solving the Problems] In the method for displaying circuit diagrams for LSI design used in the horizontal or logic circuit design support system of the present invention, a first method for extracting information on the number of signal lines of bundled lines in the circuit; a second step of converting the display data into display data in which each bundled wire has a width or its display color is changed according to the extracted information on the number of signal lines; and a third step of displaying.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a flowchart explaining an embodiment of the present invention step by step. This embodiment consists of a first step 11 of extracting information on the number of signal lines for each wire bundle on the logic circuit diagram display means 10, and information on the number of signal wires for each wire bundle extracted in step 1l. a second step 12 of converting into data for display;
The third section displays the display data in the logic circuit diagram editor.
It consists of three steps: Step 13.

Figure 2 is a layout diagram showing how to describe bundled lines by width in the logic circuit diagram editor of this embodiment. A bundled line 5 and a bundled line 6 having three signal lines are displayed with a thickness corresponding to the number of signal lines for each line type.

FIG. 3 is a layout diagram showing a description method in which the number of wire bundles is varied depending on the color in the logic circuit diagram editor of this embodiment. In this example, patterns are used instead of colors,
The wire bundle 7 with eight signal wires is shown in yellow, the wire bundle 8 with five signal wires is shown in green, and the wire bundle 9 with three signal wires is shown in red. They are displayed in different colors depending on the number.

〔Effect of the invention〕

As explained above, according to the present invention, it is possible to give the bundled lines on the logic circuit diagram editor a width or color that corresponds to the number of signal lines in the bundled wires. By knowing the number of lines, it is possible to immediately determine the trunk-branch relationship between a plurality of wire bundles with different numbers of signal lines when connecting them.

[Brief explanation of the drawing]

FIG. 1 is a flow diagram showing an embodiment of the present invention in the order of steps;
2 and 3 are layout diagrams showing the bundled line description method of this embodiment, and FIG. 4 is a layout diagram showing the bundled line description method in a conventional logic circuit diagram editor. 1,4.7...Bundle of 8 signal lines, 2.5.8...
Bundled wires of five signal lines, 3, 6.9... Bundled wires of three signal wires, 11-14... Processing steps.

Claims (1)

[Claims] In a circuit diagram display method for LSI design used in a logic circuit design support system, a first step of extracting information on the number of signal wires in bundled wires in the circuit, and a second step of converting into display data in which the bundled lines are given width or their display colors are changed;
A circuit diagram display method for LSI design, comprising a third step of displaying the display data on a circuit diagram display means.