JPH05235167A - Automatic wiring system - Google Patents

Abstract

PURPOSE:To generate layout data in which wire distribution is considered without manual operation by executing addition of pseudo-element, the generation of a terminal and alteration of connect information based on the attribute representing wire distribution added to the connect information. CONSTITUTION:If there is a terminal 2 added with the attribute 3 of a terminal 2 of an element 1 to become an arithmetic potential with a wiring 4, a pseudo- element 5 is added to connect information. Then, one terminal 6 is generated at the element 5, and terminals 7 are generated at the element 5. The number of the terminals 7 is equal to the of the terminal 2 added with the attribute 3. Finally, new wiring 8 is added in number of the terminal 2 added with the attribute 3 to the connect information, and the wiring 8 is connected to the terminal 7. Then, it is altered so as to connect the wiring 4 to the terminal 6 of the pseudo-element, and the information is altered so as to replace the wiring 4 connected to the terminal 2 added with the attribute 3 with the wiring 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic wiring system in a layout data automatic generation system for integrated circuits (hereinafter abbreviated as an automatic layout system), and more particularly to an automatic wiring system in consideration of wiring arrangement. is there.

[0002]

2. Description of the Related Art In the conventional automatic wiring system, the connection information shown in FIG. 6 created by a circuit diagram input editor, a text editor (hereinafter abbreviated as an editor), etc. is first input by the procedure shown in FIG. (Processes 201 and 202). Next, among the wiring 4 (hereinafter, abbreviated as wiring 4) which is one of the connection information shown in FIG. 6, those which are not connected in the layout are sequentially selected (processes 204 to 206), and the wiring 4 is selected. The terminals 10 of the layout figures 9 of the elements shown in FIG. 7 corresponding to the elements 1 having the same electric potential are connected by the wiring layout figure 11 on the layout according to the connection information (process 207). ).

When performing wiring in consideration of wiring arrangement by using the conventional automatic wiring method, first, the connection information shown in FIG. 6 created by the editor is manually changed by the editor, and then the cloth shown in FIG. The connection information was prepared by dividing the wiring for line division. Next, according to the procedure shown in FIG.
Input connection information (processes 201 and 202), and sequentially select the wirings 4 which are not connected in the layout among the wirings 4 shown in FIG. 8 (processes 204 to 206), and select the wiring 4 or the like. The terminals 10 of the layout figures 9 of the elements shown in FIG. 9 corresponding to the respective elements 1 having the potential are connected by the wiring layout figure 11 on the layout according to the connection information. (Process 207). Further, the part divided on the layout data shown in FIG. 9 is shown in FIG.
The wiring layout figure 14 shown in FIG. 2 was used to manually connect the wiring using a layout editor.

[0004]

In the above-mentioned conventional automatic wiring system, it is not possible to realize the wiring in consideration of the wiring distribution designating the branch point of the wiring. In addition, when wiring is performed in consideration of distribution of connection information by using the conventional automatic wiring method, the connection information is changed manually, so that the layout data generated by changing the connection information is changed. The connection of the divided parts had to be done manually. For this reason, there is a drawback in that human error must be made.

[0005]

According to the present invention, in an automatic layout data generation system for an integrated circuit, a step of retrieving an attribute indicating wiring arrangement added to a terminal of an element from connection information, Adding a pseudo element to the connection information, generating a terminal in the pseudo element based on the attribute added to the connection information, and the attribute added to the connection information Based on the above, there is provided an automatic wiring method characterized by including the step of changing the connection information.

[0006]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is an embodiment of an automatic layout system having an automatic wiring system according to the present invention. 2 is shown in FIG.
3 is an example of connection information input to the automatic layout system of FIG. FIG. 3 is an example of the connection information at the time when the connection information of FIG. 2 is changed by the automatic layout system of FIG. 1, that is, the processing 116 of FIG. 1 is ended. FIG. 4 is an example of layout data obtained as a result of inputting the connection information of FIG. 2 into the automatic layout system of FIG. 1 and performing layout.

In the automatic layout system having the present invention shown in FIG. 1, particularly when an unwired connection is designated in the connection information (process 104), the wiring 4 of FIG. Among them, one that is not wired on the layout is selected. (Processes 105 and 106 in FIG. 1) Next, a step (process 10) of searching an attribute indicating the wiring division
Carry out 7). Specifically, a step of searching all the terminals 2 to which the attribute 3 is added among the terminals 2 of the element 1 having the same potential as the wiring 4 and further adding a pseudo element to the connection information (process 110) ) Is performed and when the terminal 2 to which the attribute 3 is added exists, the pseudo element 5 shown in FIG. 3 is added to the connection information.

Next, the step of generating a terminal in the pseudo element based on the attribute added to the connection information (process 11)
1, 112). Specifically, one terminal 6 is generated in the pseudo element 5 shown in FIG. 3 (process 111), and terminals 7 are generated in the pseudo element 5 by the number of terminals 2 to which the attribute 3 is added. (Process 112).

Finally, the step of changing the connection information based on the attribute added to the connection information (process 1)
13-116). Specifically, the new wirings 8 shown in FIG. 3 are added to the connection information by the number of the terminals 2 to which the attribute 3 is added (process 113), and the wirings 8 are connected to the terminals 7 of the pseudo element 5, respectively. The connection information is changed to connect (process 114).

Next, the connection information is changed so that the wiring 4 is connected to the terminal 6 of the pseudo element shown in FIG. 3 (process 115),
The connection information is changed so that the wiring 4 connected to each of the terminals 2 to which the attribute 3 is added is replaced with each wiring 8 (Process 1).
16).

After the above steps are completed, the layout pattern 12 of the pseudo element of FIG. 4 corresponding to the pseudo element 6 shown in FIG. 3 is arranged at the position where the wiring should be branched on the layout (process 117). At this time, the position where the layout graphic 12 of the pseudo element is arranged is determined by inputting the coordinates.

Next, according to the connection information shown in FIG. 3 changed in steps 110 to 118 of FIG. 1, the terminals 10 of the layout graphic 9 of the element shown in FIG. 4 and the terminals 13 of the layout graphic 12 of the pseudo element are respectively shown. The spaces are connected on the layout by the wiring layout pattern 11.

In the placement of the pseudo element in the process 117 of FIG. 1, the layout pattern 12 of the pseudo element shown in FIG. 4 is placed on the layout at the position where the wiring 4 of FIG. 3 becomes the shortest.

Further, in the arrangement of the pseudo elements in the processing 117 of FIG. 1, in the vicinity of the element layout graphic 9 shown in FIG. 4, which corresponds to the element 1 having the terminal 2 to which the attribute 3 of FIG. 1 is not added. The layout figure 12 of the pseudo element
Place it on the layout.

[0015]

According to the present invention, the attribute indicating wiring arrangement added to the input connection information is retrieved, and the pseudo element is added based on the attribute, the terminal of the pseudo element is generated, By changing the connection information of, the position intended by the designer can be set as a branch point, and layout data can be generated in consideration of wiring arrangement.

Further, an attribute indicating wiring arrangement added to the input connection information is searched, a pseudo element is added based on the above attribute, the terminal generation of the pseudo element, and the change of the connection information are performed. By doing so, it is possible to generate layout data in consideration of wiring arrangement without requiring manual intervention in the connection information.

[Brief description of drawings]

FIG. 1 is an embodiment of a flow chart of an automatic layout system having an automatic wiring system of the present invention.

FIG. 2 is an example of connection information input to the automatic layout system of FIG.

FIG. 3 is an example of connection information at the end of processing 117 when the circuit diagram of FIG. 2 is input to the automatic layout system of FIG.

FIG. 4 is an example of layout data output when the circuit diagram of FIG. 2 is input to the automatic layout system of FIG.

[Figure 5] Automatic layout with conventional automatic wiring
1 is an example of a system flow chart.

6 is an example of connection information input to the automatic layout system of FIG.

7 is an example of layout data output when the circuit diagram of FIG. 6 is input to the automatic layout system of FIG.

FIG. 8 is another example of connection information input to the automatic layout system of FIG.

9 is an example of layout data output when the circuit diagram of FIG. 8 is input to the automatic layout system of FIG.

10 is an example of layout data in which the layout data of FIG. 9 is manually modified.

[Explanation of symbols]

 1 element 2 terminal 3 attribute which means wiring non-splitting 4 wiring 5 pseudo element 6 pseudo element terminal 7 pseudo element terminal 8 new wiring 9 element layout figure 10 element layout figure terminal 11 wiring layout figure 12 Pseudo element layout graphic 13 Pseudo element layout graphic terminal 14 Wiring layout graphic

Claims (2)

[Claims] 1. In an integrated circuit layout data automatic generation system, a step of retrieving an attribute indicating wiring arrangement added to a terminal of an element from connection information, and adding a pseudo element to the connection information. A step of generating a terminal in the pseudo element based on the attribute added to the connection information, and changing the connection information based on the attribute added to the connection information An automatic wiring method having steps. 2. An automatic layout data generation system for an integrated circuit, wherein an attribute indicating wiring layout is added to a terminal of an element which requires wiring layout of a circuit diagram input to the layout data automatic generation system. , A pseudo element and a new wiring are added to the connection information while searching for an attribute from the connection information generated from the circuit, a terminal is generated in the pseudo element, and a wiring connected to the terminal to which the attribute is added is newly added. An automatic wiring method characterized in that wiring is replaced, and further, the wiring before replacement and the new wiring are connected to terminals of respective pseudo elements.