JPH076181A - Ic circuit graphic converter - Google Patents

Abstract

PURPOSE:To convert an IC circuit graphic into an objective IC graphic even between IC whose kinds are different while the same function is held by operating the replacement of a symbol by comparing the data of a symbol data recognizing part with the data of a replacement table, and arranging and connecting the newly objective specific symbol at the symbol position of the original circuit screen based on the data of the symbol data recognizing part. CONSTITUTION:The graphic data of the original screen are read by a reading part 2, the symbol data which are present on the data by a symbol data recognizing part 3, and the data of the name, direction, and position of the symbol are stored. Next, at the time of operating the replacement of the symbol, the replacement of a symbol name is operated by referring to the name data of the reference symbol of the data file 4 and a replacement table 6, and the objective symbol is arranged at the same position as the symbol of the original screen by referring to the direction and position data of the symbol of the data file 4. Then, the prepared circuit graphic is outputted from an outputting part 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an IC circuit diagram conversion device for producing a circuit diagram when designing an IC.

[0002]

2. Description of the Related Art As a logic symbol in an IC circuit drawing, a specific one is used by each IC maker.
Therefore, in the IC design, when converting a circuit in the early stage of development into a circuit that uses different types of ICs or ICs of different manufacturers, replace the original circuit diagram symbols with the target specific symbols one by one. , You have to reconnect. This kind of work can be done manually or by converting the symbols in the state of the netlist created from the drawing, then reading the information of the newly created netlist and converting it into a circuit diagram. I also used it.

[0003]

The symbol conversion work becomes more complicated as the IC becomes larger and the circuit becomes more complicated, and it is difficult to manually perform the symbol conversion work. It also causes a mistake. On the other hand, in the method of converting the original circuit drawing into a netlist, symbol conversion, and then converting into a drawing, the symbol position in the newly created circuit diagram is the symbol position in the original drawing. May not match. in this way,
If the circuit diagram changes every time the symbol is converted, it is very inconvenient when adjusting the circuit by comparing the circuit diagrams before and after the conversion. Therefore, an object of the present invention is to easily and freely set the target I between different types of ICs or ICs of different manufacturers while maintaining the same function.
It is to be able to convert into a C circuit diagram.

[0004]

An IC circuit diagram conversion apparatus according to the present invention recognizes a data reading unit for reading graphic data from an IC circuit drawing created by a reference logic symbol and a symbol data on the read graphic data. A symbol data recognition unit, a replacement table for replacing the reference logic symbol of the input circuit diagram with another specific logic symbol, and arranging the specific logic symbol at the logic symbol position of the input circuit diagram with reference to this replacement table. The data replacement unit and the drawing output unit that outputs the circuit drawing replaced with the specific logic symbol are provided.

[0005]

When the graphic data of the original circuit drawing is read by the data reading unit, the symbol data recognition unit recognizes the data of the reference symbol existing on the graphic data and stores the necessary data. Next, the data replacement unit compares the data of the symbol data recognition unit with the data of the replacement table to replace the symbol. At the same time, based on the data of the symbol data recognition unit, a new target specific symbol is arranged and connected at the symbol position of the original circuit drawing. The circuit diagram thus created is output from the output unit.

[0006]

EXAMPLE A first example shown in FIG. 1 is a data file 1
And a data reading unit 2 for reading the data, a symbol data recognition unit 3 for recognizing symbol data on the circuit diagram, a data file 4 for storing the recognized symbol data, a replacement table 6 and a data file 7. It comprises a data replacement unit 5 and a data output unit 8.
Here, the data file 1 is a file of graphic data of the original circuit drawing, and the data file 7 is a data file of symbols corresponding to the symbols in the substitution table 6. The replacement table 6 of the present embodiment is a table that is created only by the name data of symbols and is used to replace the reference symbol with a specific target symbol.

A file 9 for saving drawings and a drawing display screen 11 are connected to the output unit 8, and the file 9 contains
The printer 10 is connected. Since the original circuit diagram is designed by using the reference symbols, the types of symbols on the input drawing become constant, and the conversion to the target dedicated circuit drawing becomes quick. This reference symbol is set by specially adding a property of easy replacement to any IC logic symbol. The shape of the symbol is the same as the one that is commonly used at present, and at present the names that are different for each company are replaced with those that are easily understood by ordinary engineers, and the delay time value is the average value of each company symbol. There is.

The operation of the first embodiment will be described with reference to the flow chart shown in FIG. First, the reading unit 2 reads the graphic data of the original drawing (step 1), and the symbol data recognizing unit 3 recognizes the data of the symbols existing on the data, and the symbol name, direction,
The position data is stored (step 2). Next, in order to replace the symbol, the name data of the reference symbol of the data file 4 and the replacement table 6 are referenced to replace the symbol name (step 3), and then the data file 4 is replaced.
The target symbol is arranged at the same position as the symbol of the drawing by referring to the direction and position data of the symbol (step 4). The created circuit diagram is output from the output unit 8 (step 5).

As in the present embodiment, if the delay time value of the reference symbol is an average value of the symbols of each company, the simulation is performed on the reference symbol after the simulation on the created drawing on the reference symbol. When adjusting, the characteristics of the IC can be grasped. When the reference symbol is replaced with a specific type of target symbol, it may not be possible to perform one-to-one replacement. In such a case, a supplementary circuit drawing created using the target type of symbol may be used. Can be replaced. The data replacement unit 5 also has such a function. The second embodiment shown in FIGS. 3 and 4 is the first embodiment except that the symbol data recognizing unit 3 repeatedly exchanges data between the data replacing units.
Similar to the embodiment, each time the reference symbol data existing on the graphic data of the drawing is recognized one by one,
This is the case when the replacement and the placement are decided.

As shown in the flowchart of FIG. 4, the operation is to read the graphic data of the original drawing (step 11), recognize the data of the symbols existing on the data, and replace the symbols one by one. Then, the arrangement is performed (steps 12 to 14). The symbol replacement is performed by comparing and referring to the name data of the reference symbol on the original drawing and the replacement table data (step 13), and is arranged on the drawing by referring to the direction data of the reference symbol on the original drawing ( Step 14). Then, while there are unconverted symbols in the drawing, the process returns to step 12 and steps 12 to 15 are repeated. In this embodiment, every time a symbol is confirmed, the symbol is replaced and the target symbol is arranged at that position, so position data is not required as the data of the symbol of the original drawing.

[0011]

[Effect] According to the IC circuit diagram conversion device of the present invention, between different types of ICs or ICs of different manufacturers,
It is possible to easily and freely convert the target IC circuit diagram while maintaining the same function. Further, the IC characteristics can be easily grasped at the time of circuit adjustment.

[Brief description of drawings]

FIG. 1 is a block diagram of a first embodiment.

FIG. 2 is a flowchart of the first embodiment.

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

FIG. 4 is a flowchart of a second embodiment.

[Explanation of symbols]

 2 data reading unit 3 symbol data recognition unit 5 data replacement unit 6 replacement table 8 data output unit

Claims (1)

[Claims] 1. A data reading unit for reading graphic data and a data of the reference symbol on the read data is recognized from an IC circuit drawing created by using a reference logic symbol having a property of being easily converted into another logic symbol. A symbol data recognition unit, a replacement table for replacing the reference logic symbol of the input circuit diagram with another specific logic symbol, and arranging the specific logic symbol at the logic symbol position of the input circuit diagram with reference to this replacement table. An IC circuit diagram conversion device comprising: a data replacement unit; and a drawing output unit that outputs a circuit drawing replaced with the specific logic symbol.