JPS6358854A - Component arrangement and formation system - Google Patents

Abstract

PURPOSE:To realize an optimal parts arrangement by a method wherein a circuit symbol library, part library, mapping process section, and fairing process section are provided. CONSTITUTION:A circuit diagram 1 is inputted, circuit symbols used in the circuit diagram 1 serve as keys in a process of retrieval from a circuit symbol library 2, and necessary logical data are obtained. Further, by using the data obtained by the circuit symbol retrieval as keys, a part library 3 is scarched, whereby parts physical data are obtained. A process follows wherein the positioning of and the direction of arrangement of parts and the routing of wirings are determined, in reference to the positional relationship of the circuit symbols in the circuit diagram 1 and based on the parts physical data obtained from the part library 3 in the preceding process.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an electrical system design system using a computer, and particularly to mounting of components such as printed circuit boards, LSIs, or hybrid ICs.

(Prior Art) Computers are commonly used in component mounting design for high-density printed circuit boards, LSIs, hybrid ICs, and the like.

Conventional technologies include printed circuit boards and LSI.

Alternatively, parts placement using an algorithm that divides hybrid ICs into grids of appropriate size and arranges parts with strong logical connections on adjacent grids is recommended.

(Problems to be Solved by the Invention) In the above-mentioned component placement generation method, the placement positions of subsequent components vary greatly depending on the size and shape of the first placed component, and the placement of parts does not necessarily result in the optimum placement as intended by the designer. There is a drawback that it cannot be done.

An object of the present invention is to convert circuit symbols on a circuit diagram into physical components by referring to a circuit symbol library that stores information on circuit symbols on a circuit diagram and a parts library that stores information on physical components. It is an object of the present invention to provide a component placement generation system configured to eliminate the above-mentioned drawbacks and achieve optimal component placement tt by executing mapping processing and shaping the placement results after the mapping processing is completed.

(Means for Solving the Problems) A component placement generation system according to the present invention includes a circuit symbol library, a component library, a mapping processing section, and a shaping processing section.

The circuit symbol library is for storing figures of circuit symbols on a circuit diagram.

The parts library is for storing information about physical parts.

The mapping processing section is for converting a circuit symbol into information about a physical component by referring to the relative position of the circuit symbol.

The shaping processing section is for finalizing the wiring layout by shaping the entire arrangement result by the mapping processing section.

(Example) Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of a component power distribution generation system according to the present invention.

In FIG. 1, 1 is a circuit diagram input to this system,
2 is a rounded circuit symbol library that stores circuit symbol information consisting of graphical information of circuit symbols, the number of input/output pins, and their attributes; 3 is a component for storing physical information consisting of the number of pins of parts and pin spacing; Library,
4 is a mapping process for extracting necessary information such as circuit symbols and logical connection information from the circuit diagram 1, and combining that information with information from the circuit symbol library 2 and parts library 3 to determine the component placement. A section 5 is a shaping processing section for shaping the result obtained by the mapping processing section 4 to provide an electrically correct arrangement, and a section 6 is data of the final mounting result.

FIGS. 2(a) to 2(C) are explanatory diagrams showing how the arrangement of components in a circuit diagram is determined by the system of FIG. 1.

The operation of this system will be explained below.

For example, when a circuit diagram 1 as shown in FIG. 2(a) is input, the circuit symbol library 2 is searched using the circuit symbols described therein as keys to obtain necessary logic data. Furthermore, using the data obtained from the circuit symbol search results as a key, the parts library 3t is searched to obtain physical data of the parts. Next, while referring to the relative positions of the circuit symbols on the circuit diagram and the connection information of the circuit symbols, determine the placement position, placement direction, and wiring route of the components (based on the previously obtained component data). .

An example of the obtained results is shown in FIG. 2(b).

In this state, there are overlapping parts and circuit shorts in the layout pattern, so a final mounting diagram is created by performing a shaping process. FIG. 2(C) shows an example of the state after shaping.

(Effects of the Invention) As explained above, the present invention makes it possible to determine the optimum placement position of components in a short time by referring to the relative positions of circuit symbols on the circuit diagram and determining the component mounting positions. Moreover, since the image of the circuit diagram becomes the actual implementation diagram, it has the effect of being easier for designers to understand.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of a component placement generation system according to the present invention. FIGS. 2(a) to 2(C) are explanatory diagrams showing how the arrangement of components in a circuit diagram is determined by the system of FIG. 1. 1... Circuit diagram 2... Circuit symbol library 3
... Parts library 4 ... Mapping processing section 5 ... Shaping processing section 6.
...Installation data patent applicant NEC Corporation representative Patent attorney Jusai Inoro Figure 1 Figure 22 (α)

Claims (1)

[Claims] A circuit symbol library for storing shapes of circuit symbols on a circuit diagram, a parts library for storing information on physical parts, and a circuit symbol library for storing information on the physical parts by referring to the relative positions of the circuit symbols. 1. A component placement generation system comprising: a mapping processing section for converting the wiring layout into a wiring layout; and a shaping processing section for shaping the placement result by the mapping processing section to determine a wiring layout.