JPH1078974A - Wiring pattern highlighting system - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a wiring pattern highlighting display system capable of narrowing down a connection relation according to a specific condition of a selected wiring. SOLUTION: A first wiring extracting means 21 extracts a wiring constituting a node and a selected wiring selected from a CAD layout diagram. The net list extracting means 23 extracts only the circuit connection list of the circuit having the node name corresponding to the same node as the selected wiring on the circuit connection list display screen. The second wiring extracting means 24 selects and extracts a specific wiring from the circuit connection list extracted and displayed by the net list extracting means 23. These extracted information are sequentially highlighted on the output device 3. By highlighting a wiring pattern having a connection relationship with a predetermined node in conjunction with the circuit connection list, the selected wiring is
It is possible to uniquely recognize which circuit is connected to the input / output terminal.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a wiring pattern highlighting system for an LSI CAD layout diagram, and more particularly to a wiring pattern highlighting system linked to a circuit connection list.

[0002]

2. Description of the Related Art Conventionally, this type of wiring pattern highlighting system highlights a wiring of interest so that the wiring can be recognized. In this highlighted display, the wiring of interest is selected from the layout diagram of the LSI displayed on the screen, and how the selected wiring is connected to the wiring of which wiring layer or the input / output terminal of which circuit. Highlight what you are doing. At the same time, it is used for highlighting a node name corresponding to a selected wiring in a display screen of a circuit connection list (hereinafter also referred to as a netlist) linked with the layout diagram.

FIG. 20 is a block diagram showing a conventional wiring pattern highlighting system. FIG. 21 is a flowchart showing the operation. Referring to FIG. 20, an input device 101 such as a mouse, a data processing device 106, and an output device 103 such as a CRT are provided. Data processing device 1
06 is a wiring extraction unit 121 and a node name extraction unit 12
2 is provided.

Referring to FIGS. 20 and 21, an example of the operation of the above configuration will be described. From the layout diagram displayed on the output device 103 in advance, select the wiring of interest from the input device 1
01 (Step A1).

Next, the information on the selected wiring is stored in the wiring extracting means 1.
21 and the node name extracting means 122, and the wiring extracting means 121 is connected to the selected wiring through all the wirings which become the same node as the selected wiring, and is a wiring of another wiring layer or a selected wiring. (A2) are extracted wirings and the like connected to the input / output terminals of the respective circuits via. The extracted wiring is highlighted and displayed (A3).

The node name extracting means 122 extracts a node name corresponding to the same node as the selected wiring in the net list of all circuits (A4), and extracts the extracted node name from the net list of all circuits displayed on the screen. The node name is highlighted and displayed (A5).

[0007]

However, in the highlighting in step A3 of the above-described conventional example, all of the extracted wirings include through holes or contacts (hereinafter simply referred to as "through holes"). Further, in the highlighted display in step A5, the net list of all circuits is enormous, and the displayed net list is connection information of only a part of the circuits. These requirements cause, for example, the following problems.

The first problem is that, in the prior art, when narrowing down to a circuit of interest from a selected wiring, if the circuit is connected to input / output terminals of a plurality of circuits, input / output of a desired circuit is not performed. ) The narrowing direction to the force terminal cannot be uniquely determined. The reason for this is that in the conventional wiring pattern highlighting system, all the wirings at the same node as the selected wiring are highlighted without recognizing which circuit is connected to the input (output) input terminal and how. Because.

A second problem is that, in the prior art, when recognizing which circuit is the same node as the input (output) terminal of which circuit, the selected wiring is connected to a plurality of circuits. If it is an output terminal, it cannot be uniquely recognized. The reason is that the information on the netlist screen display is only a part of the circuit connection information. Therefore, it is not possible to simultaneously display the netlists of all the circuits in which the input / output terminal has the node name corresponding to the same node as the selected wiring.

The third problem is that, in the prior art, an analysis device such as an electron beam tester (hereinafter, referred to as an "EB tester") is used to observe the temporal logic operation of the circuit from the selected wiring and to narrow down. I do. At this time, if output terminals of a plurality of circuits are bus-connected to the selected wiring, a circuit to be narrowed down next cannot be uniquely determined. The reason is that the circuit that is currently transmitting the input signal to the output and is in the output mode,
Alternatively, it is necessary to recognize which circuit is in a non-output mode in a high impedance state that does not transmit an input signal to an output. This need results for the same reason as the first and second problems.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a wiring pattern highlighting display system capable of narrowing down a connection relation according to a specific condition of a selected wiring.

[0012]

In order to achieve the above object, a wiring pattern highlighting system according to the present invention employs a CAD system.
This is a wiring pattern highlighting system in which a CAD layout diagram of a predetermined LSI is displayed on the screen in conjunction with a circuit connection list based on data of a CAD simulation database constituting the system. First wiring extracting means for extracting and highlighting wirings constituting the same node;
Circuit list extraction means for extracting and displaying only the circuit connection list of a circuit having a node name corresponding to the same node as the selected wiring on the circuit connection list display screen, and interlocking with the circuit connection list It is characterized in that it is possible to highlight a wiring pattern having a connection relationship with a predetermined node.

Further, the above-mentioned wiring pattern highlighting system has a second wiring extracting means for selectively extracting a specific wiring from the circuit connection list extracted and displayed by the netlist extracting means and highlighting the wiring. It is preferable that the second wiring extracting unit extracts only wiring forming a connection path from the wiring connected to the terminal corresponding to the node name of the circuit of interest to the selected wiring to enable highlighting.

[0014] Furthermore, the wiring pattern emphasis display system includes a circuit for simulating input / output terminal simulation data of a circuit.
Simulation data extraction means for extracting and displaying the simulation data from the AD simulation database; and when the selected wiring is connected to output terminals of a plurality of circuits, the simulation data extraction means extracts simulation data of input / output terminals of each circuit. It is preferable to extract the simulation data from the CAD simulation database and display the extracted simulation data.

[0015]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of a wiring pattern highlighting system according to the present invention; 1 to 19 show an embodiment of a wiring pattern highlighting system according to the present invention. FIGS. 1 to 9 show the first embodiment, and FIGS.
FIG. 19 shows the second embodiment.

<First Embodiment> FIG. 1 is a block diagram showing a first embodiment of a wiring pattern highlighting display system according to the present invention. In FIG. 1, the wiring pattern highlighting system according to the first embodiment includes an input operation 1 such as a mouse.
And a data processing device 2 and an output device 3 such as a CRT. The data processing device 2 is further disassembled into a first wiring extracting unit 21 and a node name extracting unit 22.
, A netlist extracting unit 23, and a second wiring extracting unit 24.

The first wiring extracting means 21 determines, from the layout diagram displayed on the output device 3 in advance, the same wiring as the wiring selected by the input device 1 for all wiring layers which are first contacts and nodes. The wiring is extracted and highlighted on the output device 3.

The node name extracting means 22 extracts a node name corresponding to the same node as the selected wiring in the net list of all circuits, and extracts all the nodes existing in the net list displayed on the output device 3 in advance. Highlight the extraction node name.

The netlist extracting means 23 extracts only the netlist of the circuit having the extracted node name from the netlist of all the circuits and displays the extracted netlist on the output device 3.

The second wiring extracting means 24 converts the netlist of the circuit displayed on the output device 3 by the netlist extracting means 23 from the wiring data extracted by the first wiring extracting means 21 into an input device. From the wiring connected to the terminal corresponding to the extracted node name of the circuit of interest selected by the operation 1, only the wiring constituting the connection path to the selected wiring is extracted and highlighted on the output device 3. I do.

The second wiring extracting means 24 extracts only the wiring constituting the connection path with the selected wiring from the wiring data extracted by the first wiring extracting means 21, and outputs the data. To highlight. The extraction of the wiring data is performed from the netlist of the circuit displayed on the output device 3 by the netlist extracting means 23. The extraction of only the wiring constituting the connection path is performed from the wiring connected to the terminal corresponding to the extracted node name of the circuit of interest selected by the operation of the input device 1.

Referring to FIGS. 1 and 2, an operation example of the present embodiment will be described in time series. In step A11, a wiring of interest by the input device 1 is selected from the layout diagrams displayed on the output device 3 in advance.

This wiring selection information is supplied to the first wiring extracting means 21 to extract all wiring layers which are to be the same node as the selected wiring (A12), and to output the extracted wiring to the output device 3.
(A13). At the same time, information on the selected wiring is given to the node name extracting means 22, and a node name corresponding to the same node as the selected wiring is extracted from the netlist of all circuits (A14). All the extracted node names existing in the netlist displayed in advance on the output device 3 are highlighted (A15).

Next, information on the extracted nodes is given to the netlist extracting means 23, and only the netlist of the circuit having the extracted node as an input / output terminal is extracted from the netlist of all the circuits (A16). . The output device 3 displays the extracted netlist while highlighting the extracted node.
(A17).

Next, the node to be extracted of the circuit of interest is selected by the input device 1 from the net list displayed by the net list extracting means 23 (A18). Further, information on the node of the selected circuit is given to the second wiring extracting means 24, and the wiring extracted by the first wiring extracting means 21 is connected to the terminal of the circuit corresponding to the selected node. Then, only the wires constituting the connection route to the wire selected first are extracted (A19). The extracted wiring is highlighted on the output device 3 (A20).

An operation example of the first embodiment will be described below with a focus on the display screen of the output device 3.

FIG. 3 shows LS for explaining the present embodiment.
3 shows an example of a circuit connection diagram of a part of I. FIG. FIG. 4 is a layout diagram corresponding to the circuit connection diagram and displayed on the output device 3 in advance. This is a netlist corresponding to the circuit connection diagram and displayed on the output device 3 in advance.

Referring to FIGS. 3 and 4, node name N0
0 indicates circuit blocks FB1, FB2, FB3,.
n and one terminal of MC1. This node is connected to lines L1, L2, L3, L5 and L
6 are interconnected and configured. Further, through holes T1, T2, T3, T4, T5, T6, T7 and wirings L21, L22, L23, L30, L31, L32, L
33, L34, L41, and L42 form the same node.

Also, on the layout screen DL of FIG.
Circuit blocks MC1 and FBn are not shown,
These contents cannot be confirmed as they are.

Referring to FIG. 5, net list display screen D
N indicates only the connection information of some of the circuits constituting the LSI. Therefore, information of all circuits having the same node name cannot be confirmed as it is.

Referring to FIG. 4, wiring L1 on the layout display screen is selected by input device 1 (A1). Then, the first wiring extracting unit 21 makes the wirings L2, L3, L4, L5, L6, L7, L2 forming the same node as the wiring L1.
1, L22, L23, L30, L31, L32, L3
3, L34, L41, L42 and through hole T1,
Extract T2, T3, T4, T5, T6, T7 (A1
2) Highlight on the layout screen DL (A1
3). At the same time, the node name extracting means 22 extracts a node name N00, which is the same node as the wiring L1, from the netlist of all circuits (A14), and displays the netlist display screen DN.
The node name N00 displayed above is highlighted (A
15). 6 and 7 are configuration examples of a layout display screen and a net list display screen obtained by the implementation of the first wiring extracting unit 21 and the node name extracting unit 22.

Next, the netlist extracting means 23 receives the information that the node name N00 has been selected, extracts only the netlist of the circuit having the node name N00 from the netlist of all the circuits (A16), and outputs it. A netlist display screen D as an extracted netlist display screen T on the device 3
It is displayed together with N (A17). FIG. 8 is an example of a display screen obtained by implementing the netlist extracting means 23.

The input device 1 selects a node name N00 of the circuit block MC1 of interest from the extracted net list display screen T (A18). Then, the second wiring extracting unit 24 receives the information, and highlights the content of the information on the layout screen DL (A20). The content of the highlighting is, for example, a wiring L23 forming a connection path from the wiring extracted by the first wiring extracting means 21 to the wiring L5 connected to the terminal corresponding to the node N00 of the circuit block MC1 to the wiring L1. , L32, L31 and through holes T1, T3, T4, T6 are extracted (A19).
FIG. 9 is an example of a layout display screen obtained by implementing the second wiring extracting unit 24.

Next, the effect of the first embodiment will be described. In the first embodiment, all the wirings that become the same node as the selected wiring are extracted, and a node name corresponding to the same node as the selected wiring is extracted from the netlist of all the circuits. Then, since only the netlist of the circuit having the extracted node name is extracted and displayed, it is possible to uniquely recognize which circuit the input / output terminal of the selected wiring is.

Further, by selecting a node to be extracted of the circuit of interest, only the wiring forming the connection path from the wiring connected to the terminal corresponding to the node of the selected circuit to the first selected wiring is obtained. Extract and highlight.
For this reason, when narrowing down the circuits, when the selected wiring is connected to the input / output terminals of a plurality of circuits, the narrowing down direction can be uniquely determined.

<Second Embodiment> Next, a second embodiment of the present invention will be described with reference to the drawings.

Referring to FIG. 10, the second embodiment of the present invention comprises an input device 1, a data processing device 5, an output device 3, and a storage device 4. In comparison with the first embodiment shown in FIG. 1, the data processing device 5
The difference is that a simulation data extracting unit 25 is provided in addition to the configuration of the data processing device 2 in the first embodiment. The storage device 4 has a new simulation database 41.

The simulation data extraction means 25
When the selected wiring is connected to the output terminals of a plurality of lines such as a data bus, the simulation data of the input terminals of the circuit extracted by the netlist extraction means 23 is extracted from the simulation database 41 and output by the output device 3. indicate.

Next, an operation example of the second embodiment of the present invention will be described with reference to the drawings. FIG. 11 is a flowchart illustrating a processing procedure according to the second embodiment. Step A1
Information of the circuits extracted by the first wiring extracting means 21, the node name extracting means 22, and the net list extracting means 23, which are indicated by A26 and A27 to A29, is given to the simulation data extracting means 25. Simulation data extraction means 2 based on given circuit information
5 extracts the simulation data of the input / output terminal of the corresponding circuit stored in the simulation database 41 (A30). The extracted simulation data is displayed on the output device 3 (A31).

The above operation will be described below focusing on the display screen of the output device 3. FIG. 12 shows an example of a circuit connection diagram of a part of an LSI for explaining the present embodiment.
FIG. 13 is a layout diagram corresponding to the circuit connection diagram and displayed on the output device 3 in advance. FIG. 14 is a netlist corresponding to the circuit connection diagram and displayed on the output device 3 in advance.

Referring to FIG. 12 and FIG. 13, node name N00 is used for circuit blocks FB1, FB2, FB3,.
FBn form the same node as the input terminal and the output terminals of G1, G2, G3,.
2, L3,..., Ln and LG1, LG2, LG3,
.., LGn and form the same node. Also, through holes T1, T2, T3, T4, T5, T6, T
7, T8, T9 and wirings L21, L22, L23, L
24, L30, L31, L32, L33, L34, L3
5, L36 also forms the same node.

Referring to FIG. 12, the circuit blocks G1, G2, G
3,..., Gn input terminal nodes NG1, NG2, NG
.., NGn are control terminals, which are set to a non-output mode when the test pattern is “0” and to an output mode when the test pattern is “1”.

Further, the circuit blocks Gn, MCn, and FBn are not displayed on the layout screen DL of FIG. 13 and cannot be confirmed in the current state. Referring to FIG. 14, the netlist display screen DN is an LSI
Is only displayed on the connection information of some circuits among all the circuits constituting the. Therefore, information of all circuits having the same node name cannot be confirmed as it is.

Referring to FIG. 13, wiring L1 on the layout display screen is selected by input device 1 (A1). Then, the first wiring extracting means 21 makes the wirings L2, L3,..., Ln, L21, L22, L forming the same node as the wiring L1.
23, L24, L30, L31, L32, L33, L3
4, L35, L36, LG1, LG2, LG3, ..., L
Gn and through holes T1, T2, T3, T4, T
5, T6, T7, T8, and T9 are extracted (A21) and highlighted on the layout screen DL (A22). at the same time,
The node name extracting means 22 extracts a node name N00 which is the same node as the wiring L1 from the netlist of all circuits (A31), and highlights the node name N00 displayed on the netlist display screen DN. (A32). FIG.
FIG. 16 shows a layout display screen and a net list display screen obtained by implementing the first wiring extracting means 21 and the node name extracting means 22.

Next, the netlist extracting means 23 receives the information that the node name N00 has been selected, extracts only the netlist of the circuit having the node name N00 from the netlist of all the circuits (A4), and outputs it. A netlist display screen DN as an extracted netlist display screen T on the device 3
(A5). FIG. 17 is a display screen obtained by the implementation of the netlist extracting means 23.

Next, the information of the node name N00 is received by the simulation extracting means 25, and the node name N0 stored in the simulation database 41 of the storage device 3 is received.
Circuit blocks G1, G2, G3 having 0 as an output terminal;
.., The simulation data of the input terminal of Gn is extracted (B1), and the simulation data display screen DS is displayed on the output device 3 (B2). FIG. 18 is a simulation data display screen obtained by implementing the simulation data extraction means 25.

Now, when narrowing down by observing the temporal logic operation of the circuit from the wiring L1 using an analyzer such as an EB tester, the currently observed test pattern is 100 to 1
The circuit block Gn which is the 01st pattern and in which the circuit of interest is in the output mode is set to NG in the 100 to 101 patterns of the simulation data display screen DS.
It can be confirmed from the pattern data of n.

Next, the input device 1 selects the node name N00 of the circuit block Gn of interest from the extracted net list display screen T (A6). Then, the second wiring extracting unit 24 receives the information and the first wiring extracting unit 21
Out of the wirings extracted by the above, the wirings L23, L24, L forming the connection path from the wiring LGn connected to the terminal corresponding to the node N00 of the circuit block Gn to the wiring L1
32, L31 and through holes T1, T3, T4, T
5. Extract T8 (A7) and highlight it on the layout screen DL (A8). FIG. 19 shows the second wiring extraction means 2
4 is a layout display screen obtained by performing the operation No. 4;

The effect of the second embodiment of the present invention will be described. In the second embodiment of the present invention, the simulation data of the input / output terminal of the circuit extracted by the netlist extraction unit 23 is displayed. For this reason, when narrowing down while observing the temporal logic operation of the circuit from the selected wiring using an analyzer such as an EB tester, it is necessary to recognize which circuit is currently in the output mode or the non-output mode. Then, a circuit to be narrowed down next can be uniquely determined.

The above embodiment is an example of a preferred embodiment of the present invention, but the present invention is not limited to this, and various modifications can be made without departing from the gist of the present invention.

[0051]

As apparent from the above description, the wiring pattern highlighting system of the present invention extracts wirings constituting the same node as a selected wiring selected from a CAD layout diagram, and highlights the wirings. Only the circuit connection list of the circuit having the node name corresponding to the same node as the selected wiring on the display screen of the highlighted circuit connection list is extracted and displayed. As described above, it is possible to highlight a wiring pattern having a connection relationship with a predetermined node in conjunction with the circuit connection list.

The first effect obtained by the above configuration is as follows.
The object is to be able to uniquely recognize which input / output terminal of the circuit the selected wiring is connected to. This allows
It is no longer necessary to check a circuit having a node name corresponding to the same node as the selected wiring from the netlist of all the circuits. The reason is that only the netlist of the circuit having the node name corresponding to the same node as the selected wiring is extracted from the netlist of all the circuits by the netlist extracting means and displayed.

The second effect is that when a selected wiring is connected to input / output terminals of a plurality of circuits when narrowing down a circuit from a selected wiring, a narrowing direction of a circuit of interest from the selected wiring is uniquely determined. That can be decided This eliminates the need to check the connection path to the input / output terminal of another circuit. The reason is that the second wiring extracting means extracts only the wiring constituting the connection path from the selected wiring to the circuit connected to the input / output terminal of the circuit of interest and highlights it. .

A third effect is that when narrowing down while observing the temporal logic operation of the circuit from the selected wiring using an analyzer such as an EB tester, a plurality of output terminals are connected to the selected wiring by bus connection. If this is the case, you can check which circuit is currently in output mode, transmitting the input signal to the output, or in non-output mode, which is in a high impedance state that does not transmit the input signal to the output. It is in. As a result, a circuit to be narrowed down next can be uniquely determined.

[Brief description of the drawings]

FIG. 1 shows a first example of a wiring pattern highlighting system according to the present invention.
FIG. 3 is a block diagram illustrating a configuration of the embodiment.

FIG. 2 is a flowchart illustrating the operation of the first embodiment.

FIG. 3 is a block diagram illustrating a configuration of a second embodiment.

FIG. 4 is a flowchart illustrating the operation of the second embodiment.

FIG. 5 is a circuit connection diagram applied to the first embodiment.

FIG. 6 is a layout diagram of a screen display example for selecting a wiring corresponding to FIG. 5 in an application example of the first embodiment.

FIG. 7 corresponds to FIG. 5 in the first embodiment, and is a configuration example of a net list displayed on a screen in advance.

FIG. 8 is an example of a layout diagram displayed by a first wiring extracting unit in the first embodiment.

FIG. 9 is an example of a netlist displayed by a node name extracting unit according to the first embodiment.

FIG. 10 is an example of a net list displayed by a net list extracting unit in the example of the first embodiment.

FIG. 11 is a layout diagram example displayed by a second wiring extracting unit in the first embodiment.

FIG. 12 is a circuit connection diagram used in the second embodiment.

FIG. 13 is an example of a layout diagram displayed on a screen in advance for selecting wiring corresponding to FIG. 12 in the second embodiment.

FIG. 14 is an example of a screen-displayed netlist corresponding to FIG. 12 in the second embodiment.

FIG. 15 is an example of a layout diagram displayed by a first wiring extracting unit in the second embodiment.

FIG. 16 is an example of a net list displayed by a node name extracting unit according to the second embodiment.

FIG. 17 is an example of a net list displayed by a net list extracting unit according to the second embodiment.

FIG. 18 is an example of simulation data displayed by simulation data extraction means in the second embodiment.

FIG. 19 is a layout diagram displayed by a second wiring extracting unit in the second embodiment.

FIG. 20 is a block diagram showing a configuration example of a conventional wiring pattern highlighting system.

FIG. 21 is a flowchart illustrating an operation example of a conventional wiring pattern highlighting system.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 input device 2 data processing device 3 output device 4 storage device 21 first wiring extracting means 22 node name extracting means 23 net list extracting means 24 second wiring extracting means 25 simulation extracting means 41 simulation database DL layout display screen DN net List display screen T Extracted net list display screen DS Simulation data display screen FB1 to FB3, FBn, MC1 to MC3, MCn, G
1 to G3, Gn circuit blocks XFB1 to XFB3, XFBn, XG1 to XG3, XG
n Netlist specific circuit block name L1 Wiring selected by input device L2 to L6, Ln, L21 to L24, L30 to L36,
L41, L42, LG1 to LG3, LGn Wiring T1 to T9 Through hole

Claims (3)

[Claims] A predetermined LS based on data of a CAD simulation database constituting a CAD system.
In a wiring pattern highlighting system in which a CAD layout diagram of I is displayed on a screen in conjunction with a circuit connection list, a wiring configuring the same node as a selected wiring selected from the CAD layout diagram is highlighted. First
Wiring extraction means, and a netlist extraction means for extracting and displaying only the circuit connection list of a circuit having a node name corresponding to the same node as the selected wiring on the circuit connection list display screen. A wiring pattern highlighting system, wherein a wiring pattern having a connection relationship with a predetermined node can be highlighted in conjunction with the circuit connection list. 2. The wiring pattern highlighting system,
Further, there is provided second wiring extracting means for selectively extracting a specific wiring from the circuit connection list extracted and displayed by the net list extracting means and highlighting the wiring, and the second wiring extracting means 2. The wiring pattern emphasis according to claim 1, wherein only wiring forming a connection path between the selected wiring and the wiring connected to the terminal corresponding to the node name is extracted and highlighted. Display system. 3. The wiring pattern highlighting system,
Further, there is provided simulation data extracting means for extracting and displaying simulation data of the input / output terminals of the circuit from the CAD simulation database,
When the selected wiring is connected to output terminals of a plurality of circuits, the simulation data extracting means extracts simulation data of input / output terminals of each circuit from the CAD simulation database, and displays the extracted simulation data. 3. The wiring pattern highlighting and displaying system according to claim 1, wherein: