JPH05243376A - Automatic wiring apparatus - Google Patents

Abstract

PURPOSE:To especially realize the wiring dividion of an interconnection in the automatic layout system of an integrated circuit. CONSTITUTION:A circuit diagram to which attributes indicating the wiring division of an interconnection have been added is taken into. Said attributes 3, 3' are retrieved; a pseudoelement 7 is arranged automatically so as to come into with a terminal 6' for an element to which the attributes have been added. Said pseodoelement 7 is connected to a terminal 9 for another element according to a piece of information on a connection. Thereby, an automatic wiring operation which takes a wiring division into consideration can be performed without dividing an interconnection in the circuit diagram and only by adding the attributes.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic wiring device, and more particularly to an automatic wiring device in consideration of wiring arrangement in an automatic layout / data automatic generation system of an integrated circuit (hereinafter referred to as an automatic layout system).

[0002]

2. Description of the Related Art FIGS. 5 and 6 show conventional wiring arrangements.

In FIG. 5, three elements 1 on the circuit diagram are connected to one pad 10 via a wiring 4.

In FIG. 6, three elements 1 on the circuit diagram are shown.
Are respectively connected to their own pads 11 via the wiring 4. That is, one pad 11 is provided for each element 1.
Are connected.

In FIG. 4, in the conventional automatic layout system, the element is searched in the process 90, and it is judged in the next process 91 whether or not all wirings are made. If the result is (Yes), the process 93 is not executed ( In the case of No), the processing shifts to the processing 92, the unplaced elements are arranged in the processing 92, and the processing returns to the processing 90. In the process 93, the wiring is searched, and in the next process 94, it is judged whether or not all the wires are connected.
I manually connected the open wiring. In the case of no, the unwiring is connected in process 95, and the process returns to process 94.

Conventionally, in this type of automatic wiring device, in order to perform wiring in consideration of wiring arrangement, the connection information as shown in FIG. 5 is manually divided for the wiring 4 to be subjected to wiring arrangement. As shown in FIG. 6, automatic wiring is performed with the connection information obtained by dividing the wiring, and the divided wiring 4 is then manually connected on the layout data.

At this time, the wiring is divided and the wiring is all done manually, and the wiring is not divided according to the attributes of the circuit diagram.

[0008]

In this conventional automatic wiring device, the wiring for wiring is manually divided, and thus the completed layout data is also divided. The wiring of the divided parts of the layout data is done manually, so there is a drawback that artificial mistakes are made.

An object of the present invention is to solve the above-mentioned drawbacks and to provide an automatic wiring device in which human error does not occur.

[0010]

Means for Solving the Problems The structure of an automatic wiring device of the present invention comprises means for fetching connection information to which an attribute indicating wiring distribution of wiring is added, and a terminal of an element searched by searching the attribute. Means for automatically placing the pseudo element in contact with
It has a means for connecting between the pseudo element and the terminals of the element according to the connection information.

[0011]

1 is a block diagram showing a processing procedure of an automatic wiring apparatus according to an embodiment of the present invention.

FIG. 2 is a plan view showing an example of a circuit input to the automatic layout system of FIG.

FIG. 3 is a plan view showing an example of layout data obtained by inputting and outputting the circuit diagram of FIG. 2 in the automatic layout system of FIG.

In FIG. 1, in this embodiment, first, the process 7 is performed.
When the circuit diagram is input at 0, the next connection information is generated (Process 7
1), there is a judgment whether or not the element is arranged in the process 72,
If yes, go to process 84; if no, go to process 73,
In the process 73, it is judged whether or not the unwired wires are to be connected. If so, the process 74 judges whether or not there is an unwired wire. If yes, the process returns to the process 75. ..

If the result at step 73 is NO, the process ends. Process 75
Then, one of the unwired lines is selected. In the next process 76, a terminal which is equipotential to the selected non-wiring is searched. In the next process 77, it is judged whether or not there is a terminal having the attribute of wiring arrangement. If yes, the process goes to process 79. If no, the process 7
The process proceeds to 9 and the unwired lines selected here are connected and the process 72
Go back.

In process 79, a terminal having an option in the attribute is selected, and the pseudo element is arranged so that the terminal of the element selected in the next step 80 is in contact with the terminal of the pseudo element. In process 81, one of the terminals having no option in the attribute is selected, and the terminal selected in the next process 82 and the terminal of the pseudo element (the side not in contact with the element) are connected. In the next process 83, it is judged whether or not all the terminals are connected. If yes, the process returns to process 72, and if no, the process returns to process 81.

If the result of the process 72 is "yes", it is determined in the process 84 whether or not there is any unplaced element. If there is, the process returns to the process 85, and if not, the process returns to the process 72. Process 8
In step 5, one of the unplaced elements is selected, and the next processing 8
The element selected in 6 is arranged. After this process 86, the process returns to the process 72.

FIG. 1 is a circuit diagram of FIG. 2 which is input to the automatic layout system. In the circuit diagram of FIG. , The connection information generated from the circuit diagram is taken into the automatic layout system of this example.

Next, based on the connection information, elements (hereinafter referred to as cells) 5 and 5'on the layout data corresponding to the elements 1 and 1'in the circuit diagram are arranged (FIG. 3). ..

Next, wiring distribution attributes 3, 3'are added to the terminals 2, 2'of the elements 1, 1'in the circuit diagram corresponding to the terminals 6, 6'of the cells 5, 5 '. In that case, the following processing is performed.

First, attributes 3 and 3'of wiring arrangement in the circuit diagram.
Among them, the terminal 2 ′ to which the special attribute 3 ′ is added is searched.

Then, the terminal 6'of the cell 5'corresponding to the searched terminal 2'is brought into contact with the terminal 9 of the pseudo element 7,
The pseudo element 7 is arranged.

Next, from the terminal 6 of the cell 5 corresponding to the terminal 2 to which the attribute 3 for wiring is equipotentially added to the terminal 2'to which the special attribute 3'is added, to the other terminal of the pseudo element 7. The terminals 9'are automatically connected by the wiring layout data 8.

As means for distinguishing the above-mentioned special attribute 3 ', as a means before or after a character string that means the attribute of wiring,
There is a method of adding a specific character string, and another example is a method of adding another attribute meaning a special attribute.

As another example of the placement of the pseudo element, the placement of the pseudo element 7 is performed manually, and the wiring with the terminal 9'of the pseudo element 7 placed manually is automatically performed by the wiring layout data 8. There is a method to connect them physically.

[0026]

As described above, according to the present invention, the pseudo element is arranged according to the attribute added to the connection information, and the pseudo element and the terminal of the element that becomes equipotential are connected to each other, so that manual intervention is possible. There is an effect that it is possible to generate layout data in consideration of the wiring division without need.

[Brief description of drawings]

FIG. 1 is a flowchart showing an automatic wiring device according to an embodiment of the present invention.

2 is a plan view showing a circuit that is input to the automatic layout system of FIG. 1. FIG.

FIG. 3 is a plan view showing an example of layout data obtained by inputting and outputting the circuit of FIG. 2 in the automatic layout system of FIG.

FIG. 4 is a flowchart of an example of a conventional automatic layout system.

FIG. 5 is a circuit diagram showing a circuit in which an operation targeted for automatic wiring is guaranteed.

FIG. 6 is a plan view of the circuit of FIG. 5 modified for input into a conventional automatic layout system.

[Explanation of symbols]

 1, 1'element on circuit diagram 2, 2'terminal of element 3, 3'attribute which means wiring arrangement 4 wiring on circuit diagram 5, 5'element (cell) on layout data 6, 6 ' Cell terminal 7 Pseudo element 8 Wiring on layout data 9, 9'Pseudo element terminal 70-86, 90-96 Processing

Claims (1)

[Claims] 1. A means for fetching connection information to which an attribute indicating wiring distribution of wiring is added, and a means for automatically arranging a pseudo element in contact with the terminal of the element searched by searching the attribute. An automatic wiring device comprising: a means for connecting the pseudo element and a terminal of the element according to the connection information.