JP3598201B2 - WIRING APPARATUS, WIRING METHOD, AND COMPUTER-READABLE RECORDING MEDIUM RECORDING WIRING PROGRAM - Google Patents

Description

[0001]
(table of contents)
Technical field to which the invention belongs
Conventional technology
Problems to be solved by the invention
Means for solving the problem (Fig. 1)
Embodiment of the Invention (FIGS. 2 to 12)
The invention's effect
[0002]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a wiring device, a wiring method, and a computer-readable recording medium on which a wiring program is recorded, which is suitable for designing an LSI (Large Scale Integration) or a printed wiring board.
[0003]
[Prior art]
In recent semiconductors (LSIs), multi-chip modules (MCMs), printed wiring boards, and the like, it is necessary to mount and arrange components at high density and wire them with fewer signal layers in a short period of time. Specifically, the various circuits described above are designed using a CAD (Computer Aided Design) device.
[0004]
For example, in a CAD apparatus, a wiring pattern is edited in response to various wiring problems in a printed wiring board having a large number of component pins, and a wiring route on the wiring board is determined.
By the way, the above-mentioned various circuits are required to have higher density and higher performance, and their circuit characteristics are greatly affected by crosstalk noise generated when a plurality of lines constituting a wiring pattern are close to each other.
[0005]
Therefore, when a wiring pattern of the above-mentioned semiconductor (LSI), multi-chip module (MCM), printed wiring board, etc. is edited by using a CAD device, the noise component is changed by taking into account the crosstalk noise. It is necessary to design a circuit that has little effect on the circuit.
In a general CAD apparatus, a wiring pattern editing system that edits a wiring pattern and a transmission line analysis simulator that analyzes crosstalk noise generated when a circuit is operated with respect to the wiring pattern edited by the wiring pattern editing system are interconnected. And were unable to perform both tasks in parallel.
[0006]
That is, when a worker edits a wiring pattern using the wiring pattern editing system, the wiring pattern editing system is closed, and then the transmission line analysis simulator is activated to analyze crosstalk noise when the circuit is operated. ing.
Here, if it is found that the crosstalk noise has a great effect on the circuit characteristics, after closing the above-mentioned transmission line analysis simulator, the wiring pattern editing system is started again, so that the wiring pattern The portion causing the crosstalk noise is specified and corrected.
[0007]
Specifically, when the wiring pattern edited by the operator is corrected in consideration of the crosstalk noise, for example, an analysis result by a transmission line analysis simulator is printed, and the wiring pattern editing system restarted is used. By comparing the wiring pattern displayed on the screen with the above-described analysis result by the operator himself, the location on the wiring pattern that causes crosstalk noise is specified and corrected.
[0008]
[Problems to be solved by the invention]
Therefore, in the above-described CAD apparatus, since the wiring pattern editing system and the transmission line analysis simulator are independent systems, both cannot be started at the same time, and the wiring pattern is edited while referring to the result of the transmission line analysis simulator. There is a problem that requires a great deal of labor to correct it.
[0009]
In particular, when the analysis result of the transmission line analysis simulator is displayed as a graph showing the crosstalk noise on the edited wiring pattern, only the graph on the wiring pattern that causes crosstalk noise can be obtained from this graph alone. Cannot be identified, so even if the graph is compared with the wiring pattern displayed on the screen of the wiring pattern editing system started up again, the location that caused the noise cannot be uniquely specified. In some cases.
[0010]
In this case, the estimation of the location causing the noise using the analysis result by the above-described transmission path analysis simulator and the correction of the location causing the noise estimated on the wiring pattern by the wiring pattern editing system are repeatedly performed. By doing so, it is necessary to identify and correct the location that caused the noise, which requires a great deal of labor for the operator.
[0011]
On the other hand, as a wiring pattern editing system, a system for automatically editing a wiring pattern in response to various wiring problems has been developed. However, such an automated wiring pattern editing system has been developed using the CAD system described above. Even when applied to equipment, if it becomes necessary to make corrections to the wiring pattern based on the analysis results of the transmission line analysis simulator, corrections must be made manually, and the There is also a problem that hinders improvement.
[0012]
The present invention has been devised in view of such a problem, and reduces the man-hours required for a worker to correct a wiring pattern by linking a crosstalk noise analysis and a wiring pattern editing function, thereby reducing the work required. It is an object of the present invention to provide a wiring device, a wiring method, and a computer-readable recording medium on which a wiring program is recorded, which can reduce the labor of the user.
[0013]
[Means for Solving the Problems]
FIG. 1 is a block diagram showing the principle of the present invention. In FIG. 1, reference numeral 1 denotes a wiring device. The wiring device 1 includes a wiring pattern editing unit 2, a noise analysis unit 3, and a noise occurrence location specifying unit 4. ing.
Here, the wiring pattern editing unit 2 edits the wiring pattern, and the noise analysis unit 3 occurs when the circuit operation is performed based on the wiring pattern edited by the wiring pattern editing unit 2.CrosstalkThe noise occurrence location identification unit 4 analyzes the noise based on the analysis result of the noise analysis unit 3 and the wiring pattern edited by the wiring pattern editing unit 2.CrosstalkThis is to specify a place where noise occurs.
[0014]
Also, the above-mentioned noise occurrence location specifying unit 4 is controlled so that the analysis result in the noise analysis unit 3 and the wiring pattern edited by the wiring pattern editing unit 2 are linked and displayed as noise occurrence location specifying information. In addition to the configuration, the wiring pattern editing unit 2 includes a wiring pattern correction unit that corrects a wiring pattern by moving / deleting a line forming the wiring pattern based on the displayed noise occurrence location specifying information. When moving the wiring pattern in the wiring pattern correction unit,CrosstalkNoise exceeds specified valueOf crosstalk noise around theA movement restriction area setting unit that sets a movement restriction area with respect to the influence range may be provided.
[0015]
In this case, the wiring pattern correction unit can be configured to correct the wiring pattern by moving / deleting the designated line.You.
Also, DistributionWhen correcting the line pattern, the wiring pattern correction unit can be configured so that the line is not moved to the area set by the movement restriction area setting unit.,It is also possible to have a movement restriction area display section for displaying the area set by the movement restriction area setting section described above.You.
[0016]
In the wiring apparatus 1 shown in FIG. 1 described above, this occurs when a wiring pattern is edited and a circuit operation is performed based on the edited wiring pattern.CrosstalkAnalyze the noise and link the above analysis result with the edited wiring pattern.CrosstalkWhere noise occursOn the displayView and identify.
[0017]
Also, based on the displayed noise occurrence location specifying information, the wiring pattern is corrected by moving / deleting the lines constituting the wiring pattern.CrosstalkNoise exceeds specified valueOf crosstalk noise around theA movement restriction area can be set for the influence range. At this time, it is possible to restrict the line from moving to the movement restriction area.
In this case, the movement restriction area is set together with the noise occurrence location identification information.On the displayCan be displayed.
Further, the wiring method of the present invention includes a wiring pattern editing unit for editing a wiring pattern, and a noise for analyzing crosstalk noise generated when a circuit is operated based on the wiring pattern edited by the wiring pattern editing unit. An analysis unit, and a noise occurrence location identification unit that identifies a location where crosstalk noise occurs in the wiring pattern based on the analysis result in the noise analysis unit and the wiring pattern edited by the wiring pattern editing unit. A wiring method for editing a wiring pattern in a wiring device provided, wherein the noise analysis unit detects crosstalk noise generated when a circuit is operated based on the wiring pattern edited by the wiring pattern editing unit. Analyze and link the analysis result in the noise analysis unit and the wiring pattern edited by the wiring pattern editing unit in the noise occurrence location specifying unit. The wiring pattern editing unit controls the display to be displayed as noise occurrence location specifying information, and moves / deletes lines constituting the wiring pattern based on the displayed noise occurrence location specifying information. When the pattern is corrected and the wiring pattern is moved by the wiring pattern editing unit, a movement restriction area must be set in advance with respect to the influence range of the crosstalk noise around the net where the crosstalk noise exceeds a predetermined value. It is characterized by.
[0018]
Further, the computer-readable recording medium on which the wiring program of the present invention is recorded is generated when a computer performs a wiring pattern editing function for editing a wiring pattern and operates a circuit based on the edited wiring pattern.CrosstalkA noise analysis function for analyzing noise is linked with the above-described analysis result and the edited wiring pattern.CrosstalkWhile a wiring program for realizing a noise generation location specifying function of displaying and specifying a location where noise is generated is recorded, the wiring pattern editing function is based on the displayed noise generation location identification information, A wiring pattern correction function for correcting the wiring pattern by moving / deleting the lines constituting the wiring pattern is provided. When the wiring pattern is moved in the wiring pattern correction function,CrosstalkNoise exceeds specified valueOf crosstalk noise around theA wiring program for realizing a movement restriction area setting function of setting a movement restriction area with respect to the influence range is recorded.
[0020]
At this time, in the computer-readable recording medium recording the wiring program of the present invention,Said movement restrictionsIn the area, you can record a wiring program to realize a function that restricts lines from moving.You.
In this case, in a computer-readable recording medium on which the wiring program of the present invention is recorded, the computerSaid movement restrictionsA wiring program for realizing a function of displaying an area together with noise occurrence location specifying information can be recorded.You.
[0021]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 2 is a block diagram showing a CAD (Computer Aided Design) device as a wiring device according to an embodiment of the present invention.PlaceIn terms of hardware, it is provided with a CPU (Central Processing Unit), a memory, a display, and the like, and a disk device that functions as a database.
[0022]
In addition, this CAD equipmentPlaceFunctionally, as shown in FIG. 2, a display 11, a wiring editing / display control unit 12, a wiring pattern database (wiring pattern DB) 13, a circuit model generating unit 14, a circuit model database (circuit model DB) 15, a transmission A road analysis simulator 16 and an analysis result database (analysis result DB) 17 are provided.
[0023]
That is, the above-described wiring edit / display control unit 12, circuit model generation unit 14, and transmission line analysis simulator 16 are mainly configured by a CPU or the like, and are stored in the memory (not shown) from each of the databases 13, 15, and 17 or the like. It is operated by a wiring program.
The wiring programs for realizing the various functions as the wiring editing / display control unit 12, the circuit model generation unit 14, and the transmission line analysis simulator 16 include, for example, a recording medium such as a disk medium and a disk device. It can be installed via a reading device and stored in a predetermined area of a memory (not shown).
[0024]
Here, the wiring editing / display control unit 12 controls the wiring pattern edited as a solution to various wiring problems so as to be displayed on the display 11, and performs, for example, correction processing such as moving or deleting the wiring pattern. The editing operation is performed on the wiring pattern displayed on the display 11 as described above, and has a function as a wiring pattern editing unit that edits the wiring pattern.
[0025]
The wiring pattern database (wiring pattern DB) 13 stores the display information of the wiring pattern (dot information constituting the wiring pattern on the screen of the display 11) edited by the wiring editing / display control unit 12 in, for example, two-dimensional coordinates. It is something to keep. Further, the circuit model generation unit 14 recognizes circuit characteristics by detecting circuit components from display information from the wiring pattern DB 13, and generates an equivalent circuit having characteristics similar to the circuit characteristics as a circuit model. The generated circuit model is stored in a circuit model database (circuit model DB) 15.
[0026]
Further, the transmission path analysis simulator 16 receives information on the equivalent circuit of the wiring pattern from the circuit model DB 15 and operates the transmission path when the circuit is operated based on the wiring pattern edited by the wiring editing / display control unit 12. It has a function as a noise analysis unit for analyzing crosstalk noise generated in (wiring pattern).
[0027]
In the transmission line analysis simulator 16, a part of the wiring pattern edited by the wiring editing / display control unit 12 is extracted based on, for example, an instruction from an operator, and only a part of the wiring pattern is extracted. It is possible to analyze crosstalk noise focusing on.
Here, the crosstalk noise refers to a phenomenon in which a signal of a certain line leaks to another line when a plurality of lines (transmission lines) forming a wiring pattern come close to each other. For example, as shown in FIG. 4, nets (lines) 21 and nets 22 constituting a wiring pattern are close to and parallel to each other in regions A and B. 21 gives crosstalk noise to the net 22).
[0028]
For example, when the pulse signal (p1) shown in FIG. 6 is transmitted in the net 21 shown in FIG. 4, when the crosstalk noise (p2) is received from the net 22, the pulse signal (p1) is added to the crosstalk noise (p2). Are superimposed, and the pulse signal (p1) deteriorates (see the dotted line (p1 ') in FIG. 6).
The magnitude (noise peak) of the crosstalk noise is a function of the interval between a plurality of lines and the length of the lines that are close to and parallel to each other, while the paths m1 and m2 where the noise propagates in the regions A and B. Is proportional to the times t1 and t2 from the reference time to the noise peak in the analysis result of FIG.
[0029]
In this case, the noise peak (voltage value on the vertical axis) shown in FIG. 5 increases as the distance between the nets 21 and 22 decreases, while the length s1 in which the mutual nets 21 and 22 are parallel in the regions A and B is shown. , S2 become longer.
That is, as shown in FIG. 5, although the intervals between the nets 21 and 22 in the areas A and B are almost the same, the length s1 in which the nets 21 and 22 are parallel in the area A is equal to the length of the nets 21 and 22 in the area B. It is smaller than the parallel length s2, and the ratio of the noise peak in the region B to the noise peak in the region A is 11/12.
[0030]
By the way, the analysis result database (analysis result DB) 17 shown in FIG. 2 is a display information for displaying the analysis result regarding the crosstalk noise from the transmission path analysis simulator 16 on the display 11 as a graph showing the crosstalk noise. (Dot information corresponding to x, y coordinates).
The wiring editing / display control unit 12 controls the wiring pattern edited as a solution to various wiring problems as described above to be displayed on the display 11, and receives display information from the analysis result DB 17 and transmits the display information. The analysis result of the crosstalk noise by the road analysis simulator 16 is controlled so as to be displayed on the display 11 in a graph such as a line graph, a bar graph, or the like in association with the above-described wiring pattern.
[0031]
That is, the wiring editing / display control unit 12 compares the wiring pattern from the wiring pattern DB 13 with the crosstalk noise from the analysis result DB 17 and the analysis result, thereby determining how much and at what position on the wiring pattern. Thus, it is possible to clarify and specify the correspondence such as whether or not crosstalk noise is generated, and to control the display so as to be displayed on the display 11.
[0032]
In other words, the analysis results regarding the wiring pattern and the crosstalk noise displayed on the display 11 are displayed in correspondence with each other, whereby the crosstalk generated on the wiring pattern is displayed. Noise can be uniquely recognized.
Specifically, the display 11 indicates and displays the locations causing crosstalk noise as A and B together with the wiring pattern shown in FIG. 4, and displays the analysis results corresponding to the locations A and B in FIG. As shown in FIG. 5, the positions A and B of the noise peaks are indicated and indicated by the same symbols. The wiring pattern and the analysis result are simultaneously displayed on the same screen on the display, thereby facilitating the worker's work of comparing the noise occurrence location.
[0033]
Note that the display 11 displays the locations A and B, which are the causes of the crosstalk noise, on the wiring pattern and the amount of the generated crosstalk noise by displaying an ellipse as shown in FIG. The visibility of the person can also be improved.
In other words, the display 11 links the analysis result of the transmission path analysis simulator 16 with the wiring pattern edited by the wiring editing / display control unit 12 and displays the result as noise occurrence location specifying information.
[0034]
Therefore, noise is generated in the wiring pattern by the display 11 and the wiring editing / display control unit 12 based on the analysis result in the transmission path analysis simulator 16 and the wiring pattern edited by the wiring editing / display control unit 12. It functions as a noise occurrence location identification unit that identifies a location where noise occurs.
FIG. 3 is a functional block diagram showing a CAD apparatus according to the present embodiment. In the CAD apparatus shown in FIG. 3, the wiring pattern DB13, the circuit model generator 14, the circuit model DB15 shown in FIG. Illustration of the analysis result DB 17 is omitted.
[0035]
Here, as shown in FIG. 3, the wiring editing / display control unit 12 functionally includes a wiring pattern correction unit 12a and a movement restriction area setting unit 12b.
Here, the wiring pattern correction unit 12a can automatically correct the wiring pattern by moving / deleting lines constituting the wiring pattern based on the noise location specifying information displayed on the display 11. .
[0036]
Note that the wiring pattern correction unit 12a automatically corrects a corresponding portion when the noise peak exceeds a predetermined threshold based on the analysis result from the transmission line analysis simulator 16. I have. The correction of the wiring pattern by the wiring pattern correction unit 12a can also be performed based on an instruction from an operator.
[0037]
Also, as shown in FIG. 8, when two or more (for example, two) nets 21 and 22 give crosstalk noise to the net 23, the operator can use the wiring pattern correction unit 12a. , One of the nets 21 and 22 is selected and designated as a net to be corrected. As a result, the wiring pattern correction unit 12a can automatically correct the wiring pattern by moving / deleting the specified net (line).
[0038]
In this case, the portion that causes the crosstalk noise that the net 23 receives from the net 21 is the region C, and the portion that causes the crosstalk noise that the net 23 receives from the net 22 is the regions D and E, The crosstalk noise received by the net 23 is obtained by combining the crosstalk noise from the net 21 (see (q1) in FIG. 9) and the crosstalk noise from the net 22 (see (q2) in FIG. 9). 9 (q3)], and the noise peak exceeds a predetermined threshold [see (q4) in FIG. 9].
[0039]
On the display 11, as in the case of FIGS. 4 and 5, the analysis result shown in FIG. 9 is displayed by linking to the location on the wiring pattern shown in FIG. The user can specify the largest cause of the crosstalk noise exceeding the predetermined threshold among the nets 21 and 22 to perform correction (rewiring), and effectively reduce the crosstalk noise generated as a result of the analysis. Can be suppressed.
[0040]
For example, figure9Are caused by the crosstalk noise received from the net 21 in the region C and the crosstalk noise received from the net 22 in the region E (see (q4) in FIG. 9).
On the other hand, the operator designates the net 22 and moves the line XY in the area E causing the crosstalk noise as shown by a dotted line (a) in FIG. Noise can be suppressed below a predetermined threshold.
[0041]
By the way, the movement restriction area setting unit 12b shown in FIG. 3 sets a movement restriction area (a wiring prohibited area) to be restricted as a destination of a line, and is used when the wiring pattern correction unit 12a corrects a wiring pattern. The movement of the line to the movement restriction area set by the movement restriction area setting unit 12b is prohibited.
That is, when correcting the wiring pattern, the wiring pattern correction unit 12a is configured not to move the line to the area set by the movement restriction area setting unit 12b.
[0042]
When the wiring pattern is moved in the wiring pattern correction unit 12a, there is a possibility that crosstalk noise may occur at the destination where the wiring pattern has been moved. This can be avoided by setting the movement restriction area for the influence range of the crosstalk noise around the net exceeding.
[0043]
In the movement restriction area setting unit 12b, an area where the crosstalk noise is not reduced by correcting the net giving the crosstalk noise in the wiring pattern correction unit 12a may be set as the movement restriction area. it can.
Further, as shown in FIG. 3, the display 11 is functionally configured to include a noise occurrence location display section 11a and a movement restriction area display section 11b.
[0044]
Here, the noise occurrence location display unit 11a links the analysis result of the transmission path analysis simulator 16 with the wiring pattern edited by the wiring editing / display control unit 12 as described above, and as noise occurrence location identification information. To display.
Further, the movement control area display section 11b displays the movement control area set by the movement control area setting section 12b, for example, as an area F shown in FIG.
[0045]
In the case shown in FIG. 10, the net 24 gives crosstalk noise to the net 25, and the location causing the crosstalk noise is the region G. In the case where the net 24 is corrected by moving / deleting the line in the area G in the wiring pattern correction unit 12a, the line as the movement destination is prohibited from entering the movement restriction area F.
[0046]
In this case, by moving the line VW in the region G causing the crosstalk noise as shown by a dotted line (b) in FIG. 10, for example, the crosstalk noise received by the net 25 is lower than before the correction. Can be guaranteed.
As shown in FIG. 10, a movement restriction area F for restricting the movement of the line can be displayed together with an area G as noise occurrence location specifying information.
[0047]
The operation of the CAD apparatus according to the present embodiment having the above configuration will be described below with reference to the flowcharts (steps S1 to S6 and steps T1 to T6) shown in FIGS.
That is, when the wiring editing / display control unit 12 edits a wiring pattern corresponding to a wiring problem, display information on the wiring pattern is stored in the wiring pattern DB 13.
[0048]
The circuit model generation unit 14 receives the display information on the wiring pattern from the wiring pattern DB 13 and pays attention to a net as a local wiring pattern constituting the wiring pattern. A circuit model of the net is generated (step S2 from the NO route of step S1).
The transmission path analysis simulator 16 receives the circuit model generated by the circuit model generation unit 14 from the circuit model DB 15, executes an analysis process based on the circuit model, and transmits the analysis result via the analysis result DB 17. To the wiring editing / display control unit 12 (step S3).
[0049]
If there is an error based on the analysis result from the analysis result DB 17, that is, if the noise peak of the crosstalk noise exceeds a predetermined threshold, the wiring editing / display control unit 12 generates the crosstalk noise. Control is performed so that the analysis result from the analysis result DB 17 is linked to the cause and the result is displayed on the display 11 (YES route from step S4 to step S5).
[0050]
That is, in the display 11, the operator corrects the wiring pattern by displaying and identifying the location on the wiring pattern that causes crosstalk noise and the noise peak location in the analysis result with the same reference sign. It is possible to clearly determine what should be done.
Thereafter, in the wiring pattern correction unit 12a, automatic correction (rewiring) is performed on the portion causing the crosstalk noise to eliminate the error generated in step S4 (step S6). .
[0051]
If there is no error based on the analysis result from the analysis result DB 17, that is, if the noise peak of the crosstalk noise does not exceed the predetermined threshold, or if the rewiring in the above step S 6 is completed, Based on the same processing steps as in the case (1), necessary rewiring based on the analysis result of the crosstalk noise is performed over all the nets of interest as local wiring patterns constituting the wiring pattern (NO in step S6 or step S4). Step S1 from the route).
[0052]
By the way, in the wiring pattern correction unit 12a, correction is performed on a portion that has caused crosstalk noise as shown in the flowchart of FIG.
First, in the movement restriction area setting unit 12b, an area in which an error occurs is set in advance for each line (net) as a movement restriction area (wiring prohibited area), and the wiring pattern is corrected so that the line does not enter this area after the movement of the line. The section 12a is set (step T1 in the flowchart of FIG. 12).
[0053]
That is, the line is restricted from moving in a region where the noise generated on the wiring pattern exceeds a predetermined value when the circuit is operated, so that even after the correction, the crosstalk noise can be surely reduced. Guaranteed to decrease.
Here, the wiring prohibited area set by the movement restriction area setting unit 12b can be displayed on the display 11 together with the noise occurrence location specifying information after registering it in the wiring pattern DB 13 (step T2) (step T3). .
[0054]
Thereafter, when there are a plurality of nets that cause crosstalk noise in the focused local wiring pattern, the operator specifies a net to be corrected (step T4). Then, the wiring pattern correction unit 12a performs rewiring of the specified net automatically or in accordance with the instruction of the operator (step T5, step T6).
[0055]
Since the crosstalk noise affects each other between a plurality of adjacent lines, the net giving the crosstalk noise also receives another net or the crosstalk noise.
In the transmission path analysis simulator 16, the noise analysis is performed after setting a net that gives the crosstalk noise and a net that receives the crosstalk noise in advance. Can also be modified. That is, the process in step T4 is performed prior to the process in step T1, and the process of designating the net to be corrected is performed. Should be set.
[0056]
As described above, according to the CAD apparatus according to the present embodiment, the analysis result in the transmission path analysis simulator 16 and the wiring pattern edited by the wiring editing / display control unit 12 are provided by the wiring editing / display control unit 12 and the display 11. Based on the above, by linking the analysis of crosstalk noise and the automatic editing function of wiring patterns, it is possible to specify (display) a place where noise is generated in the wiring pattern, so that the location where the crosstalk noise is generated for the operator is determined. In addition to being clear, the number of man-hours required for pattern correction can be reduced, and there is an advantage that it can greatly contribute to system automation.
[0057]
Further, according to the present invention, when the wiring pattern is corrected, the wiring pattern correction unit 12a includes the movement restriction area setting unit 12b so that the line is not moved to the area set by the movement restriction area setting unit 12b. By taking into account the crosstalk noise at the destination of the line when correcting the wiring pattern, the crosstalk noise in the wiring pattern can be assured to be lower than before the correction, without the need for human intervention. There is an advantage that the wiring pattern can be automatically and easily corrected at high speed, and the time for wiring design can be greatly reduced.
[0058]
Further, according to the present invention, since the area set by the movement restriction area setting unit 12b can be displayed by the movement restriction area display unit 11b, especially when correcting the wiring pattern according to the instruction of the operator, Modifications can be made while being aware of the movement-restricted area, and operators will not be instructed to move lines to the movement-restricted area by mistake. There is an advantage that can be shortened.
[0059]
【The invention's effect】
As described in detail above,ClearlyAccording to the noise generation location identification unit, based on the noise analysis result and the edited wiring pattern, the crosstalk noise analysis and the automatic editing function of the wiring pattern are linked to each other, and the location where the noise occurs in the wiring pattern Can be identified (displayed), so that the location where crosstalk noise occurs can be clarified for the operator, the number of man-hours required for pattern correction can be reduced, and the advantage of greatly contributing to system automation can be obtained. is there.
[0060]
further,BookAccording to the invention, when correcting a wiring pattern, it is possible to configure so as not to move the line to the movement restriction area. Therefore, it is necessary to take into account crosstalk noise at the destination of the line when correcting the wiring pattern. This makes it possible to automatically and easily correct wiring patterns at high speed and without human intervention, while ensuring lower crosstalk noise in wiring patterns than before correction, greatly reducing the time required for wiring design. There are advantages that can be done.
[0061]
Also,BookAccording to the present invention, since the movement restricted area can be displayed, particularly when correcting the wiring pattern according to the instruction of the worker, the correction can be performed while being conscious of the movement restricted area, and the worker may erroneously move. There is no need to issue an instruction to move the line to the restricted area, and there is an advantage that the time required for wiring design can be significantly reduced by improving work efficiency.
[Brief description of the drawings]
FIG. 1 is a principle block diagram of the present invention.
FIG. 2 is a block diagram showing a CAD device as a wiring device according to one embodiment of the present invention.
FIG. 3 is a functional block diagram illustrating a main part of the CAD apparatus according to the embodiment;
FIG. 4 is a diagram for explaining a cause of generation of crosstalk noise in the embodiment.
FIG. 5 is a diagram showing an analysis result of the CAD apparatus according to the embodiment by a transmission line analysis simulator.
FIG. 6 is a diagram illustrating an example of occurrence of crosstalk noise in the present embodiment.
FIG. 7 is a diagram showing a display example corresponding to a location causing a crosstalk noise and a size thereof in the embodiment.
FIG. 8 is a diagram for explaining a cause of generation of crosstalk noise in the present embodiment.
FIG. 9 is a diagram showing an analysis result of the CAD apparatus according to the present embodiment by a transmission line analysis simulator.
FIG. 10 is a diagram showing a display example of a movement restriction area on the movement restriction area display unit of the CAD apparatus according to the embodiment.
FIG. 11 is a flowchart for explaining the operation of the CAD apparatus according to the embodiment;
FIG. 12 is a flowchart for explaining the operation of the CAD apparatus according to the embodiment;
[Explanation of symbols]
1 Wiring device
2 Wiring pattern editor
3 Noise analysis unit
4 Noise generation point identification unit
11 Display (noise generation location identification unit)
11a Noise occurrence location display
11b Movement restriction area display
12 Wiring editing / display control unit (wiring pattern editing unit noise generation location specifying unit)
12a Wiring pattern correction unit
12b Movement restriction area setting unit
13 Wiring pattern DB
14 Circuit model generator
15 Circuit Model DB
16 Transmission line analysis simulator (noise analysis unit)
17 Analysis result DB
21-25 net

Claims (9)

A wiring pattern editing unit for editing wiring patterns,
A noise analysis unit that analyzes crosstalk noise generated when the circuit is operated based on the wiring pattern edited by the wiring pattern editing unit;
A noise occurrence location identification unit that identifies a location where crosstalk noise occurs in the wiring pattern based on the analysis result in the noise analysis unit and the wiring pattern edited by the wiring pattern editing unit;
The noise occurrence location identification unit is configured to link the analysis result in the noise analysis unit and the wiring pattern edited by the wiring pattern editing unit, and to control the display as noise occurrence location identification information. ,
The wiring pattern editing unit includes a wiring pattern correction unit that corrects the wiring pattern by moving / deleting a line configuring the wiring pattern based on the displayed noise location specifying information;
In addition, when the wiring pattern is moved in the wiring pattern correction unit, a movement restriction area setting for setting a movement restriction area for an influence range of crosstalk noise around a net in which crosstalk noise exceeds a predetermined value in advance. A wiring device characterized by having a section. 2. The wiring apparatus according to claim 1, wherein the wiring pattern correction unit is configured to correct the wiring pattern by moving / deleting a designated line. 2. The wiring pattern correction unit according to claim 1, wherein, when correcting the wiring pattern, the wiring pattern correction unit is configured not to move the line to an area set by the movement restriction area setting unit. Wiring device. 2. The wiring device according to claim 1, further comprising a movement restriction area display section for displaying an area set by the movement restriction area setting section. A wiring pattern editing unit that edits a wiring pattern, a noise analysis unit that analyzes crosstalk noise generated when a circuit is operated based on the wiring pattern edited by the wiring pattern editing unit, and a noise analysis unit. Based on the analysis result and the wiring pattern edited by the wiring pattern editing unit, in a wiring device having a noise occurrence location specifying unit that specifies a location where crosstalk noise occurs in the wiring pattern, The wiring method to edit ,
The noise analysis unit analyzes crosstalk noise generated when the circuit is operated based on the wiring pattern edited by the wiring pattern editing unit ,
The noise occurrence location specifying unit links the analysis result in the noise analysis unit and the wiring pattern edited by the wiring pattern editing unit and controls the link to be displayed as noise occurrence location identification information ,
In wiring pattern editing unit, based on the displayed noise source identifying information, to correct the wiring pattern by moving / delete lines constituting the wiring pattern,
When moving the wiring pattern in the wiring pattern editing unit, advance crosstalk noise and said set Teisu Rukoto the movement restricting areas against the influence range of the cross-talk noise around the net exceeds a predetermined value To do the wiring method. 6. The wiring method according to claim 5 , wherein the wiring pattern editing unit restricts the movement of the line to the movement restricted area so as not to move the line. On the computer,
A wiring pattern editing function for editing wiring patterns,
A noise analysis function for analyzing crosstalk noise generated when a circuit is operated based on the edited wiring pattern;
While linking the analysis result and the edited wiring pattern, and recording a wiring program for realizing a noise generation position specifying function of displaying and specifying a position where crosstalk noise occurs in the wiring pattern,
The wiring pattern editing function includes a wiring pattern correction function of correcting the wiring pattern by moving / deleting a line configuring the wiring pattern based on the displayed noise occurrence location specifying information;
In addition, when the wiring pattern is moved by the wiring pattern correction function, a movement restriction area setting for setting a movement restriction area for an influence range of crosstalk noise around a net in which crosstalk noise exceeds a predetermined value in advance. A computer-readable recording medium on which a wiring program is recorded, wherein a wiring program for realizing the functions is recorded. The computer-readable recording medium according to claim 7 , wherein the line is restricted so as not to move in the movement restriction area. 9. The computer-readable recording medium according to claim 8 , wherein the movement restriction area is displayed together with the noise occurrence location specifying information.

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