JP2003036281A - System, method and program for creating circuit symbol - Google Patents

Abstract

PROBLEM TO BE SOLVED: To create a circuit symbol in which allocation of pin names and pin numbers, shape of circuit symbols and pin arrangement are consolidated. SOLUTION: In a file 7, each pin name of circuit components is cross referenced to input/output attributes and positive and negative polarities in advance, and in a file 17, coordinate positions X, Y of the pin in the circuit symbol and a shape of circuit symbol classified in accordance with pin usages are cross referenced to the pin name in advance. The pin names of circuit components corresponding to the names of the circuit components inputted from an input/output device 3 are retrieved from the file 7 by a central processing unit 5, the circuit symbols are generated responding to the shapes of the circuit symbols cross referenced to the retrieved pin names in the file 17, and the retrieval pin names and the pin numbers which are inputted from the input/output device 3 and cross referenced to the retrieval pin names are allocated to the pins of the circuit symbols in accordance with the coordinate positions X, Y.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit symbol creating system, a circuit symbol creating method, and a circuit symbol creating program, and more specifically, it represents a circuit component such as an LSI by a CAD system that supports the design of a printed circuit board. The present invention relates to a circuit symbol creating system, a circuit symbol creating method, and a circuit symbol creating program that assign a pin name and a pin number to each pin of the circuit symbol and define the input / output attribute and positive / negative polarity of the pin when creating the circuit symbol.

[0002]

2. Description of the Related Art Conventionally, when a designer uses a CAD system to create a circuit symbol of a logical circuit diagram of an LSI such as FPGA (Field Programmable Gate Arrays), first, a circuit of various shapes stored as a template in a file of the CAD system. Select the circuit symbol of the required shape from the symbols. When making this selection, the circuit symbol where the dedicated pin defined in the logic circuit is placed,
Each circuit symbol for performing pin arrangement is selected for each functional group indicating a pin usage application, such as a circuit symbol in which a user pin is arranged and a circuit symbol in which a power supply pin is arranged.

Next, after assigning a pin name and a pin number of the same functional group to each pin of the selected circuit symbol, an input indicating whether the pin is a signal input pin, an output pin or an input / output pin is given. The pin placement is completed by defining the output attributes and the positive and negative polarities. As a result, circuit symbols are created for each functional group.

However, instead of selecting a circuit symbol for each functional group, after selecting one circuit symbol,
The pins of this circuit symbol may be divided into functional groups. This is done by collecting pins having the same function in the desired area of the circuit symbol because the pin name indicates each function.

[0005]

By the way, when the pin arrangement is executed as described above, the designer performs the work of assigning pin names and pin numbers, defining input / output attributes and positive / negative polarities for each pin. As the number of pins increases, the work man-hours increase, and there is a problem that mistakes are likely to occur in the allocation and definition.

Furthermore, since the designer selects the shape of the circuit symbol by his / her own sense and creates the circuit symbol by arranging the pins according to the above-mentioned allocation and definition, variations in the shape and the pin arrangement of the circuit symbol occur. There's a problem. When such variations occur, there is a problem that it is difficult to cite in the circuit diagram design.

The present invention has been made in view of the above circumstances, and pin numbers and pin numbers are assigned, input / output attributes and positive / negative polarities are accurately and easily defined, and circuit symbol shapes and pin arrangements are unified. It is an object of the present invention to provide a circuit symbol creating system, a circuit symbol creating method, and a circuit symbol creating program capable of creating the circuit symbol.

[0008]

In order to solve the above-mentioned problems, the invention according to claim 1 relates to a circuit symbol creating system for performing pin arrangement on a predetermined circuit symbol indicating a predetermined circuit component by a CAD function. , For each pin,
A first file that defines and stores information related to pin numbers, pin names, and pin attributes, and a second file that defines and stores the arrangement position of the pin name on the circuit symbol for each functional group or pin usage. File, and pin arrangement is performed on a predetermined circuit symbol by looking at the first and second files.

The invention according to claim 2 relates to the circuit symbol creating system according to claim 1, wherein the information regarding the attribute of the pin includes at least information regarding the input / output attribute of the pin or the positive / negative polarity. It is characterized by that.

According to a third aspect of the present invention, there is provided a circuit symbol creating system for arranging pins on a predetermined circuit symbol indicating a predetermined circuit component by a CAD function. The pin name includes a first file that stores information related to attributes in association with each other, position information of pins arranged in the circuit symbol, and shape information of the circuit symbol classified according to a function group or pin usage application. A second file stored in association with
The pin name of the circuit component corresponding to the input circuit component name is searched and extracted from the first file, and the circuit is based on the shape information associated with the extracted pin name in the second file. A symbol is generated, and the extracted pin name and / or the pin is added to the pin of the generated circuit symbol.
It is characterized by comprising a processing means for allocating the pin number associated with the extracted pin name based on the position information of the pin associated in the second file.

According to a fourth aspect of the present invention, in the circuit symbol creating system according to the third aspect, the processing means has the extracted pin name or / or the extracted pin name for each pin.
And information on the circuit symbol to which the pin number is assigned is registered in the third file.

Further, the invention according to claim 5 relates to the circuit symbol creating system according to claim 3, wherein the information regarding the attribute of the pin includes at least information regarding the input / output attribute or positive / negative polarity of the pin. It is characterized by that.

Further, the invention according to claim 6 relates to a circuit symbol creating method for arranging pins on a predetermined circuit symbol indicating a predetermined circuit component by a CAD function, and a pin name is assigned to each circuit component. Information related to attributes is stored in advance in the first file in association with each other, and position information of pins arranged on the circuit symbols and shape information of the circuit symbols classified according to pin usage are used as the pin names. Correspondingly stored in the second file in advance, and when the circuit component name is input, the pin name of the circuit component corresponding to the circuit component name is searched and extracted from the first file. A circuit symbol is generated in accordance with the shape information associated with the extracted pin name in the second file, and the extracted pin name or / is generated in the pin of the generated circuit symbol. Beauty, pin number associated with the extracted pin name, is characterized in that assigned based on the position information of the pin associated with the second file.

The invention according to claim 7 relates to the circuit symbol creating method according to claim 6, wherein the information of the circuit symbol to which the extracted pin name and / or the pin number is assigned is assigned to each pin. Is registered in the third file.

Further, the invention according to claim 8 relates to the circuit symbol creating method according to claim 6, wherein the information regarding the attribute of the pin includes at least information regarding the input / output attribute or positive / negative polarity of the pin. It is characterized by that.

According to a ninth aspect of the present invention, there is provided a circuit symbol creating program, wherein a pin arrangement is performed on a predetermined circuit symbol indicating a predetermined circuit component by a CAD function. The creation method is characterized by causing a computer to carry out the method.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. The description will be specifically made using the embodiments. FIG. 1 is a block diagram showing the configuration of a circuit symbol creating system according to an embodiment of the present invention. As shown in FIG. 1, the circuit symbol creating system 1 of this example includes an input / output device 3 including an input device such as a keyboard and a mouse and an output device such as a display, a central processing unit 5, and a pin name information file 7. , A symbol file 9, a symbol shape information file 17, and a ROM for storing a control program for causing the central processing unit 5 to realize each function of the circuit symbol creation system of this example.
(Not shown) and RA for securing a working area for the central processing unit 5 and temporarily storing various data.
And M. In this example, the pin name information file 7, the symbol file 9, and the symbol shape information file 17 are stored in a computer-readable / writable external storage device such as a magnetic disk device, an optical disk device, or an IC memory. The symbol shape information file 17 further includes a dedicated pin name symbol shape information file 11 and a user pin name symbol shape information file 1.
3 and the power pin name symbol shape information file 15.

The input / output device 3 is used by the designer to perform various input operations when designing a logic circuit diagram of an LSI such as an FPGA, and to display the logic circuit diagram. One of the operations is a circuit symbol. Is created. The central processing unit 5 refers to the pin name information file 7 and the symbol shape information file 17 in accordance with an input command from the input / output unit 3 at the time of creating a circuit symbol, and performs a process of creating a circuit symbol. The process of storing the created circuit symbol data in the symbol file 9 is performed.

As shown in FIG. 2, the pin name information file 7 defines in advance the pin name, input / output attribute, and positive / negative polarity of each pin of the circuit symbol. In the pin name information file 7, as shown in the figure, the pin number associated with the pin name is input by the designer when the circuit symbol is created. That is, focusing on the first line in the pin name information file 7, "CL" indicating that the pin name of the circuit symbol pin is the clock signal input pin
K ”,“ I ”indicating that the input / output attribute is an input pin,
P, which indicates that the positive and negative polarities are positive, is defined. In addition, the input / output attribute “O” indicates that the pin is an output pin, and the positive / negative polarity “N” indicates the negative polarity.

The symbol shape information file 17 defines in advance the coordinate positions X and Y of each pin of the circuit symbol and whether each pin is dedicated, user, or power source. In this example, Dedicated pin name symbol shape information file 11, user pin name symbol shape information file 1
3 and the power pin name symbol shape information file 15 are defined for each functional group. FIG. 3 is a conceptual diagram showing a configuration example of the dedicated pin name symbol shape information file 11.

Dedicated pin name symbol shape information file 1
As shown in FIG. 3, in No. 1, focusing on the first line,
It is defined in the column of the circuit symbol shape that the pin having the pin name CLK has the coordinate position X of 50 and the coordinate position of Y of 10, and the function group is dedicated. Although not shown, similarly, the user pin name symbol shape information file 13 defines the coordinate positions X and Y of the pin whose pin name is the user name and that the function group is for the user. There is. However, in this user pin name symbol shape information file 13, the pin name and coordinate position X, Y
The user (designer) can arbitrarily change. The power pin name symbol shape information file 15 contains
It is defined that the pin position is the power supply name and the coordinate position X, Y of the pin and the function group is for the power supply.

Next, referring to FIG. 4, the operation of the circuit symbol creating system having the above-described configuration (method of creating a circuit symbol)
Will be described. FIG. 4 is a flowchart showing a circuit symbol creating method according to an embodiment of the present invention.

When the control program is read from the ROM (not shown), the central processing unit 5 is controlled by the control program and executes the following processing. First, in step S1, the designer inputs the product name of an LSI such as an FPGA from the input / output device 3, and in step S2,
The pin name information file 7 is searched by the central processing unit 5, the pin name used for the LSI of the product name, the input / output attribute and positive / negative polarity information associated with the pin name are read, and the input / output device 3 is read. Is displayed on the display.
This display is displayed, for example, in the list form shown in FIG. 2, but since the pin number is input by the designer,
At this point, the pin numbers written in parentheses are not displayed.

Next, in step S3, the designer refers to a specification document such as a catalog of the LSI product name and confirms the pin number previously associated with the pin name in the specification document, while checking the pin number in step S2. Enter the pin number corresponding to the pin name in the pin number field displayed in. As a result, for example, the pin number in parentheses is input as shown in FIG.

When all the pin numbers have been input, the central processing unit 5 searches the symbol shape information file 17 in step S4 to determine whether the pin name of the input pin number is a dedicated pin name. To be done. This decision is
For example, if the pin name is CLK, file 1 shown in FIG.
This is performed by recognizing the information of the circuit symbol shape column of 1, that is, the exclusive use.

As a result, when it is determined that the pin name is the dedicated pin name, the dedicated pin name is assigned to the pin at the coordinate position X, Y defined in the dedicated pin name symbol shape information file 11 in step S5. Is decided. As a result, for example, the pin name CLK is determined so as to be assigned to the pin at the coordinate position X = 50 and Y = 10.

On the other hand, if it is determined in step S4 that the pin name is not the dedicated pin name, it is determined in step S6 whether the pin name of the input pin number is the user pin name. As a result, when it is determined that the user pin name is the user pin name, in step S7, the user pin name is the user pin name symbol shape information file 13
It is determined that the pins are assigned to the coordinate positions X and Y defined in the above.

If it is determined in step S6 that it is not the user pin name, then in step S8 it is determined whether the pin name of the input pin number is the power supply pin name. As a result, when it is determined that the power supply pin name is the power supply pin name, in step S9, the power supply pin name is
It is determined to be assigned to the pins at the coordinate positions X and Y defined in the power pin name symbol shape information file 15.

Further, if the result of the determination in step S8 is that the pin name is not a power source pin name, that is, if it is determined that it is not a dedicated, user, or power source pin name, in step S10, for example, the operator. But,
When an input operation is performed using the input / output device 3 such as a keyboard, the central processing unit 5 determines, based on the input data,
For example, other pin names are arranged in alphabetical order in the empty space (empty storage area) of the symbol shape information file 17, and the coordinate positions X and Y are arranged for each arranged pin name.
And further, the information of the circuit symbol shape indicating that it is not a dedicated, user, or power supply pin name is assigned. In this way, the other pin names
It is determined to be assigned to the pins at the coordinate positions X and Y defined in the created file.

When the assignment of the coordinate positions X and Y for all the pin names is completed in this way, step S1
In 1, the circuit symbol is generated by the central processing unit 5 according to the information on the coordinate positions X and Y of the pin name associated with the pin number and the information on the circuit symbol shape, and displayed on the display. For example, as shown in FIG. 5, a dedicated pin name symbol 21, a user pin name symbol 23, and a power pin name symbol 25 are generated and displayed.

The dedicated pin name symbol 21 has a circuit symbol shape of a dedicated function, and a pin number and a pin name are assigned to the pins at the coordinate positions X and Y determined in step S5. For example, coordinate position X = 50, Y =
The pin number 179 and the pin name CLK are assigned to the 10 pins. The user pin name symbol 23 has a circuit symbol shape of a user function, and the step S7 is performed.
A pin number and a pin name are assigned to the pins at the respective coordinate positions X and Y determined in. Power pin name symbol 2
Reference numeral 5 has a circuit symbol shape of a power supply function, and pin numbers and pin names are assigned to the pins at the coordinate positions X and Y determined in step S9. After this display, in step S12, the data of each symbol 21, 23, 25 is registered in the symbol file 9 by the central processing unit 5. However, at the time of this registration, a unique name such as an LSI product name is added as a search name.

As described above, according to the configuration of this example, the pin name information file 7 is associated with the pin input / output attributes and the positive / negative polarity information of each pin name of the LSI in advance, and the symbol shape information file is used. In FIG. 17, the coordinate positions X and Y of the pins in the circuit symbol and the circuit symbol shapes classified according to the purpose of use of the pin are associated in advance with the pin name, and input from the input / output device 3 by the central processing unit 5. L
The pin name of the LSI corresponding to the SI product name is searched from the pin name information file 7, the circuit symbol is generated according to the circuit symbol shape associated with the searched pin name in the symbol shape information file 17, and this generated The search pin name and the pin number input from the input / output device 3 in association with the search pin name are assigned to the pins of the circuit symbol according to the coordinate positions X and Y associated in the symbol shape information file 17. did.

As a result, the designer simply inputs the LSI product name and the pin number corresponding to each pin name to automatically generate a circuit symbol of an appropriate shape, and the pin of the circuit symbol is provided with the pin name and the pin. Numbers can be assigned and input / output attributes and positive / negative polarities can be defined.
The shape of the circuit symbol and the pin arrangement can be unified.

Further, according to the configuration of this example, since the central processing unit 5 registers the information of the circuit symbol to which the pin name and the pin number are assigned, the unique name is associated with the symbol file 9 and registered. The circuit symbol once created can be used by another designer.

The embodiment of the present invention has been described in detail above with reference to the drawings. However, the specific structure is not limited to this embodiment, and the design change and the like without departing from the gist of the present invention. Even this is included in this invention.

For example, in the above-described embodiment, the present invention is configured such that a circuit symbol having a predetermined shape is generated for each functional group and a pin is arranged for each circuit symbol, but the present invention is not limited to this. According to the invention, pins having all the functions of one LSI may be arranged in one circuit symbol. In this case, the shape information of one circuit symbol corresponding to the LSI product name is made into a file in advance, the shape information of the circuit symbol corresponding to the LSI product name is read from this file, and the pin arrangement is performed on this circuit symbol as described above. To do. In that case, an effect similar to that of the above-described embodiment can be obtained. Further, in the above-described embodiment, the case where the pin name and the pin number are arranged on the circuit symbol has been described, but instead of this, only the pin name may be arranged, or the pin number may be arranged. Only one may be arranged. Further, in the above-described embodiment, the case where the information regarding the pin attribute includes the information regarding the input / output attribute of the pin and the positive / negative polarity is described, but any one of them may be used, or different from them. Anything is fine.

[0037]

As described above, according to the configuration of the present invention, in the circuit symbol creating system for creating the circuit symbol indicating the circuit component by the CAD function, the pin input / output attribute of each pin name of the circuit component. A first file in which positive and negative polarity information is associated with each other, and a second file in which pin position information in circuit symbols and circuit symbol shape information classified according to pin usage are associated with pin names. , The pin name of the circuit component corresponding to the input circuit component name is searched from the first file, and the circuit symbol is generated according to the shape information associated with this search pin name in the second file. The pin of the generated circuit symbol is assigned the search pin name and the pin number input in association with this search pin name according to the position information associated in the second file. Since it is provided with a processing means for allocating a pin, pin names and pin numbers can be assigned, input / output attributes and positive / negative polarities can be defined accurately and easily, and circuit symbols having uniform circuit symbol shapes and pin arrangements can be created. .

[Brief description of drawings]

FIG. 1 is a block diagram showing an electrical configuration of a circuit symbol creating system according to an embodiment of the present invention.

FIG. 2 is a conceptual diagram showing an example of information associated with a pin name information file that constitutes the circuit symbol creation system.

FIG. 3 is a conceptual diagram showing an example of information associated with a dedicated pin name symbol shape information file forming the circuit symbol creation system.

FIG. 4 is a flowchart showing an operation processing procedure of a central processing unit which constitutes the circuit symbol creation system.

FIG. 5 is a schematic configuration diagram showing configurations of a dedicated pin name symbol, a user pin name symbol, and a power supply pin name symbol, which are circuit symbols, created by the circuit symbol creation system.

[Explanation of symbols]

1 Circuit Symbol Creation System 3 Input / Output Device 5 Central Processing Unit 7 Pin Name Information File (1st File) 9 Symbol File (3rd File) 11 Dedicated Pin Name Symbol Shape Information File (Part of 2nd File) ) 13 User pin name symbol shape information file (second
15) Power supply pin name symbol shape information file (part of the second file) 17 Symbol shape information file (second file)

Claims (9)

[Claims] 1. A circuit symbol creating system for arranging pins on a predetermined circuit symbol indicating a predetermined circuit component by a CAD function, wherein for each pin, a pin number, a pin name, and information about a pin attribute are defined. And a second file for storing the pin name arrangement position on the circuit symbol for each functional group or pin usage application, and storing the same. A circuit symbol creating system characterized by performing pin placement on a predetermined circuit symbol by viewing a file. 2. The circuit symbol creation system according to claim 1, wherein the information regarding the attribute of the pin includes at least information regarding the input / output attribute of the pin or the positive / negative polarity. 3. A circuit symbol creating system for arranging pins on a predetermined circuit symbol indicating a predetermined circuit component by a CAD function, wherein information on a pin attribute is associated with each pin name of the circuit component. A first file to be stored, and position information of pins arranged in the circuit symbol and shape information of the circuit symbol classified according to a functional group or a pin usage application, and stored in association with the pin name. 2 file and the pin name of the circuit component corresponding to the input circuit component name is searched and extracted from the first file, and the shape associated with the extracted pin name in the second file A circuit symbol is generated based on the information, and the extracted pin name and / or the extracted pin name is added to the pin of the generated circuit symbol.
A circuit symbol creation means for allocating a pin number associated with the extracted pin name based on the position information of the pin associated in the second file. system. 4. The processing means, for each pin,
4. The circuit symbol creating system according to claim 3, wherein information on the circuit symbol to which the extracted pin name or / and the pin number is assigned is registered in a third file. 5. The circuit symbol creation system according to claim 3, wherein the information regarding the attribute of the pin includes at least information regarding the input / output attribute of the pin or the positive / negative polarity. 6. A circuit symbol creating method for arranging pins on a predetermined circuit symbol indicating a predetermined circuit component by a CAD function, wherein information on a pin attribute is associated with each pin name of the circuit component. The second file is stored in the first file in advance, and the positional information of the pins arranged in the circuit symbol and the shape information of the circuit symbol classified according to the pin usage are associated with the pin name. When the circuit component name is input, the pin name of the circuit component corresponding to the circuit component name is searched and extracted from the first file, and the extracted pin name is stored in the A circuit symbol is generated according to the shape information associated in the second file, and pins of the generated circuit symbol are
The extracted pin name and / or the pin number associated with the extracted pin name are assigned based on the position information of the pin associated in the second file. Circuit symbol creation method. 7. The circuit symbol according to claim 6, wherein for each pin, information on the circuit symbol to which the extracted pin name and / or the pin number is assigned is registered in a third file. How to make. 8. The circuit symbol creating method according to claim 6, wherein the information regarding the attribute of the pin includes at least information regarding the input / output attribute of the pin or the positive / negative polarity. 9. A circuit symbol creating program for causing a computer to carry out the circuit symbol creating method according to claim 6, 7 or 8, wherein pins are arranged on a predetermined circuit symbol indicating a predetermined circuit component by a CAD function.