JP2771708B2 - How to divide and rejoin board data - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for dividing and recombining board data, and relates to a method for forming a wiring circuit on a printed circuit board.
It is effective when used for designing by AD (Computer Aided Design).

[0002]

2. Description of the Related Art In recent years, a large number of components are mounted on a printed circuit board at a high density, and a multilayer printed circuit board has been developed, and accordingly, a wiring circuit formed on the printed circuit board is complicated and dense. It has become to. For this reason, the wiring circuit of the printed circuit board is designed using CAD.

In designing a wiring circuit using the CAD, one block of the circuit is divided, and the design of the divided blocks is partially redesigned and recombined. You may want to combine An example of such a case will be described with reference to FIGS. To configure a circuit including the resistors R1, R2, R3 and the transistors Q1, Q2 as shown in FIG. 2, a wiring circuit as shown in FIG. 3 was designed by CAD. In the design, the connection portions of components such as resistors and transistors are pins, and the names of the pins are given using the names of the components. That is, (a) Pin names at both ends of the resistor R1 are R1, R1, (b) Pin names at both ends of the resistor R2 are R2, R2, (c) Pin names at both ends of the resistor R3 are R3, R3, (d) The pin name of each end of the transistor Q1 is Q1,
Q1, Q1 (e) The pin name of each end of the transistor Q2 is Q2,
Q2 and Q2.

Further, a line connecting each component is called a net. In this example, net names S1, S2,..., S6 are used, and each net is defined by an end of the line and a pin in the middle as shown below. S1: R1, Q1 S2: Q1, Q2 ... S3: Q2, Q1, R2 S4: Q2, R3 S5: R2, R3 ...

[0005] As shown in FIG. 3, when the CAD data is divided at a position indicated by a dashed-dotted line, and the wiring circuit on the left side of the dividing line is A block and the wiring circuit on the right side is B block, as shown in FIG. Into two wiring circuits.
Then, there is a demand to modify a part of the wiring circuit of the B block and connect it to the A block again, or to connect a new block different from the B block to the A block.

[0006]

However, if the designed wiring circuit is simply divided, as shown in FIG. 4, the divided end points TA1, TA2, and TA3 of the A block and the divided end points TB1, TB2, and TB3 of the B block. Has no defined pins, and these divided end points are indistinguishable from non-connect lines. To make a line connection in CAD,
By specifying two pins to be connected and issuing a command to connect the two pins, line connection can be performed collectively. For this reason, in order to simply connect the divided A and B blocks after correction, it is necessary for a human to confirm and connect the lines one by one. Further, the data connected in this manner does not match the net data of the CAD.

An object of the present invention is to provide a method capable of separating and reconnecting wiring circuits only by operating CAD software in view of the above-mentioned prior art.

[0008]

According to the structure of the present invention which solves the above-mentioned problems, when a wiring circuit for a printed circuit board designed by a computer is divided into two blocks,
A dummy part having a different name is generated at each division end point of one block, and a dummy part having the same name as the dummy part generated at one division end point connected before division is provided at each division end point of the other block. When a component is generated and one block and the other block are combined, the dummy components having the same name are searched for and connected to each other, and after the connection, the dummy component is deleted. When adding another circuit to A or modifying a divided B block, the same net name as that of the A block must not be used. If used, the same net name needs to be rewritten in another block at the time of connection.

[0009]

In operation, a dummy portion is generated at a dividing end point of both blocks at the time of division, and at the time of coupling, a command for connecting and searching for a dummy part having the same name is issued, so that the wiring circuit can be divided and re-coupled using CAD software. .

[0010]

The method of the present invention will be described below. FIG. 1 shows FIG.
1 shows a state in which the printed circuit board shown in FIG. 1 is divided by applying the method of the present invention. As shown in FIG. 1, dummy parts J1, J2, and J3 having different names are generated at the divided end points TA1, TA2, and TA3 of the divided A block, and the divided end points TB1 and TB of the B block.
2 and TB3 have different dummy parts J1 and J1, respectively.
J2 and J3 are generated. Then, a dummy component having the same name is generated at the divided end point connected before the division so that the A and B blocks correspond to each other. That is, (i) a dummy component J1 is generated at the divided end points TA1 and TB1, (ii) a dummy component J2 is generated at the divided end points TA2 and TB2, and (iii) a dummy component J3 is generated at the divided end points TA3 and TB3. (iv) Dummy parts J4 are generated at the divided end points TA4 and TB4. The positions (pins) of the respective dummy components J1, J2, J3 are defined as J1, J2, J3.

After making necessary modifications to the B block,
When reconnecting the A block and the B block, an instruction is issued to search for pins having the same name among the pins at the dividing end points of the A block and the pins at the dividing end points of the B block to connect them. Then, the dummy part J1 on the A block side
And each of the nets having the dummy component J1 on the B block side becomes one net. Similarly, the dummy component J2 on the A block side and the dummy component J2 on the B block side, the dummy component J3 on the A block side and the dummy component J3 on the B block side
Each net having is one net. When the mutual nets are connected by the dummy component, the dummy component is erased. Assuming that the net name of the B block is rewritten to the net name of the A block by this operation, the nets T1, T2, T3, and T4 of the B block are changed to the net name of the A block as follows. T1 → S2 T2 → S3 T3 → S4 T4 → S5

The recombination in this manner enables
Can be returned to the wiring circuit shown in FIG.

[0013]

According to the present invention, as described above in detail with the embodiment, a dummy part is generated at the time of division,
At the time of reconnection, the dummy components are reconnected using clues, so that the wiring circuit can be easily divided and reconnected using a CAD software command.

[Brief description of the drawings]

FIG. 1 is a wiring circuit diagram showing a method of the present invention.

FIG. 2 is a circuit diagram showing an electric circuit to be designed.

FIG. 3 is a wiring circuit diagram showing a conventional technique.

FIG. 4 is a wiring circuit diagram showing a conventional technique.

[Explanation of symbols]

TA1, TA2, TA3, TB1, TB2, TB3 divided end points S1, S2, S3, S4, S5, T1, T2, T3, T
4 Net J1, J2, J3 Dummy component R1, R2, R3 Resistance Q1, Q2 Transistor

Claims (1)

(57) [Claims] When a wiring circuit for a printed circuit board designed by a computer is divided into two blocks, a dummy part having a different name is generated at each divided end point of one of the blocks, and a dummy part having a different name is generated in the other block. At each divisional end point, a dummy part having the same name as the dummy part generated at one of the divisional end points connected before the division is generated, and when combining one block with the other block, the name is the same. A method for dividing and recombining board data, characterized by searching for and connecting dummy parts that have been connected, and erasing the dummy parts after connection.