JPH0816633A - Circuit design support system - Google Patents

Abstract

PURPOSE:To easily retrieve a diverting destination by storing the data showing the diverting destination of the circuit design data into the circuit design data on the management unit and extracting the diverted circuit design data based on the data on the diverting destination when a changing instruction is given to the optional circuit design data. CONSTITUTION:Receiving a changing instruction into the optional circuit design data, a diverting destination retrieving part 304 checks whether the diverting destination data are stored in a diverting destination storage part 314. If stored, all circuit design data stored in a circuit information data base device 300 are retrieved and the circuit design data that is diverting the circuit design data received the changing instruction is extracted. Thus the diversion history can be easily retrieved for execution of the diverting design.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit design support system in a CAD system.

[0002]

2. Description of the Related Art In recent years, the shortening of product life cycle and the increasing functionality of developed products are becoming more and more advanced. Among them, in the circuit design as well, it is required to further shorten the development period and improve the functionality of the circuit. In such a circuit design environment, various CAD tools are used to contribute to the efficiency of design work. Then, in the CAD tool, it is required to reuse (use) the existing design result and efficiently perform the circuit design.

[0003]

When such a diversion design is performed, the diversion is performed for each block of the circuit. The diversion destination of the block, that is, which drawing is used, and which drawing is used. It has been desired to realize a circuit design support system that can easily retrieve a history of diversion such as which drawing a block is diverted to.

[0004]

In order to solve the above-mentioned problems, the circuit design support system of the present invention uses, as a diversion destination memory, circuit design data indicating which circuit design data has been diverted. Each section is provided. And
When an instruction to change to arbitrary circuit design data is received, based on the diversion destination data stored in the diversion destination storage unit, all stored circuit design data are searched, and the circuit design data for which the change instruction is received Is provided with a diversion destination search unit that extracts circuit design data that has been diverted.

[0005]

In the circuit design support system of the present invention, when receiving an instruction to change to arbitrary circuit design data, the diversion destination search unit determines whether or not there is diversion destination data stored in the diversion destination storage unit. Find out. When there is diversion destination data, all the circuit design data stored in the circuit information database device is searched, and the circuit design data in which the circuit design data for which the change instruction has been received is diverted is extracted.

[0006]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of a circuit design support system of the present invention. Prior to the explanation of this embodiment,
A basic explanation of the circuit design support system is given. First, the features of various data handled by the circuit design support system will be described.

FIG. 2 is an explanatory diagram of various data handled by the circuit design support system. Generally, in circuit design, describe functional block diagrams 1 and 2 showing the functional configuration of the circuit, a circuit diagram 3 showing the circuit at the gate level, a component table 4 showing information on the parts constituting the circuit, design know-how, etc. A design document 5 or the like is created.

[0008] Functional block diagrams 1 and 2 show the functions constituting a circuit and are functional blocks A, B and C and functional blocks A-1 and A-2 which represent one functional group.
And signal lines 6 and 7 representing the connection relationship between these functional blocks A, B and C and the functional blocks A-1 and A-2.

The circuit diagram of FIG. 3 expresses a circuit at a gate level, and is composed of circuit symbols 8 and 9 and a signal line 10 showing a function at the gate level. The component table 4 expresses the components (IC components, etc.) that make up the circuit, and shows the component part numbers for identifying the components and the number of used parts. The design document 5 is data in which design know-how related to a circuit is described.
Further, in each drawing, 11 indicates a drawing number.

Next, the functional block diagrams 1 and 2 as described above, the circuit diagram 3, the component table 4, and the design document 5 (hereinafter, collectively referred to as circuit design data) created by the circuit design. Structural features will be described. As shown in FIG. 2, generally, the circuit design data has a hierarchical structure of functional units based on blocks. For example, in the example shown in FIG. 2, the detailed content of the functional block A, which is one function in the functional block diagram 1, is shown in the functional block diagram 2. According to the functional block diagram 2, the functional block A is a functional block. It can be seen that it is composed of A-1 and functional block A-2. Further, it can be seen that the functional block A-1 which is one function in the functional block diagram 2 is composed of the circuit diagram 3, the component table 4 and the design document 5.

As described above, the circuit design data has a structure that can be created and managed in functional units using blocks and can be diverted in functional units. Therefore, generally, in circuit design, diversion is often performed in functional units (block units). Further, in recent years, the number of devices to be developed has increased along with the production of a large number of products and a small amount, and the higher functionality of the devices has been required, so that the number of blocks and the hierarchy tend to increase.

Next, the configuration and operation of the circuit design support system having the basic configuration will be described. FIG. 3 is a configuration diagram showing the configuration. The system shown in the figure includes a plurality of input editing devices 20 (20-1 to 20-n), a communication line 30, and a circuit information database device 40.

The input editing device 20 is a device designed by an operator, and includes an input / output control unit 21, a central processing unit 22,
It comprises a database access unit 23, a keyboard 24, a mouse 25 and a display 26. Since each of the input editing devices 20-1 to 20-n has the same configuration, they will be described as one input editing device 20. The input / output control unit 21 has a function of connecting an input device such as a keyboard 24 and a mouse 25 and a display 26 such as a CRT to control these, and receives an instruction from an operator through the keyboard 24 and the mouse 25. The instruction is transmitted to the central processing unit 22.

The central processing unit 22 generates graphic data based on the information from the input / output control unit 21, and the input / output control unit 21
Is displayed on the display 26 via. Further, the central processing unit 22 requests the database access unit 23 to retrieve necessary circuit design data from the circuit information database device 40 or registers the created circuit design data according to an instruction from the operator. It has the function of giving instructions. Database access unit 23
Has a function of fetching the existing circuit design data in the circuit information database device 40 and registering the created circuit design data via the communication line 30 according to an instruction from the central processing unit 22. There is.

The communication line 30 comprises a local area network or an analog / digital line,
The plurality of input editing devices 20 and the circuit information database device 40 are communicatively connected. That is, the circuit information database device 40 is shared by a plurality of input editing devices 20, and the system can be used in a block unit among a plurality of operators.

The circuit information database device 40 stores circuit design data in management units, and comprises a database input / output control unit 41 and a circuit information storage unit 42. The database input / output control unit 41 is connected to the communication line 30 and has a function of a communication control device that controls input / output as the circuit information database device 40. Further, the database input / output control unit 41 outputs the circuit design data already stored in the circuit information storage unit 42 or registers the received circuit design data in the circuit information storage unit 42 in response to a request from the input editing device 20. It has the function of doing.

The circuit information storage section 42 stores circuit design data in design units (devices, boards, LSIs, etc.) as a management unit. That is, a plurality of one-circuit data storage units 43-1 to 43-1 which store the circuit design data of one design unit
43-n.

FIG. 4 shows the one-circuit data storage section 43-1.
It is a block diagram of the circuit design data in -43-n. FIG. 4 shows the internal configuration of one circuit data storage unit 43 of the one circuit data storage units 43-1 to 43-n.
The circuit data storage units 43-1 to 43-n have the same internal configuration. As shown in the figure, one circuit data storage unit 4
3 includes a block diagram data storage unit 44, a circuit diagram data storage unit 45, a component table data storage unit 46, and a document data storage unit 47.

The block diagram data storage section 44 comprises a block diagram management data storage section 44a and a block graphic data storage section 44b.
Includes a function name storage unit 44a-1 and a drawing number storage unit 44a.
-2 and a higher block drawing number storage unit 44a-3 are provided.

In the block diagram management data storage unit 44a, the function name storage unit 44a-1 stores data indicating the functional characteristics of the block, and the drawing number storage unit 44a-2 stores the data for identifying each drawing. Drawing number data is stored. In addition, the upper block drawing number storage unit 44a-3
The drawing number of the block diagram corresponding to the higher order is stored in the table. Further, the block graphic data storage unit 44b is
The drawing number of the block diagram corresponding to the lower order is stored.

The circuit diagram data storage unit 45 is a region for storing data such as circuit symbols that form a circuit diagram and signal lines that represent connection relationships between the circuit symbols, and a storage region corresponding to the circuit diagram 3 in FIG. Is. Further, the component table data storage unit 46 is an area for storing the drawing numbers of the parts constituting the circuit and the quantity thereof, and the document data storage unit 47 stores document data in which design know-how and the like are expressed in characters. These are areas, and these correspond to the component table 4 and the design document 5 in FIG. Incidentally, these circuit diagram data storage unit 45 to document data storage unit 47
Specifically, stores a pointer (file name or the like) indicating the storage location of these data.

FIG. 5 is an explanatory diagram showing the relationship between the one-circuit data storage unit 43 and the hierarchical structure of blocks. This Figure 5
2 corresponds to the configuration of FIG. 2 described above. When focusing on the block diagram 52, the upper block diagram is the block diagram 51, and the lower block diagrams are the block diagram 53 and the block diagram 54.

In such a block hierarchical structure, for example, in the case of the block diagram 52, the drawing number 521 of the block diagram 52 is stored in the drawing number storage unit 44a-2.
"700A" is stored, and the drawing number 51 of the block diagram 51 is stored in the upper block drawing number storage unit 44a-3.
“700B”, which is 1, is stored. Further, in the block figure data storage unit 44b, the drawing numbers 531 of the block diagram 53 and the block diagram 54, which are lower blocks,
"700C, 700D" which is 541 is stored.

In this way, each block diagram 51-54
The hierarchical structure is configured, and by managing various data in block units, the circuit design data and the structural characteristics thereof described in FIG. 2 can be expressed by this system.

Next, a circuit design work method using such a circuit design support system will be described. In general, design work includes (1) new design (when designing new functions, etc.) (2) modified design (when problems in the existing design are found and corrections are made) (3) diversion design (The result of the existing design can be used as it is, or a new function can be added to the used product).

The circuit design work using the above system will be described with respect to the above three design works. However, the method of inputting drawings (block diagram, component list, circuit diagram, etc.) is the same as in known CAD, so
The details are omitted). (1) When performing a new design The operator inputs data from the keyboard 24, the mouse 25, etc. and creates a drawing, as in the known CAD system.

(2) When designing for modification: A block to be modified is called and a modification is made to this block diagram or circuit diagram. If a change is made, especially if a change is found in the already-designed content, a similar defect may occur in other design data that already diverts this block, so the operator is the target of the change. Find out where the block is used and notify the reason for the change and the details of the problem.

In this case, the operator first accesses the circuit information database device 40 to obtain a block list and displays it on the display 26. Next, the operator finds a block having the same function name as the block to be changed from the displayed blocks, refers to the content of the extracted block, and visually diverts the block to be changed. To determine if

(3) In the case of carrying out diversion design First, in order to know whether or not the function to be diverted is in the circuit information storage unit 42 of the circuit information database device 40, a list of blocks is displayed from the circuit information database device 40. Is acquired and displayed on the display 26.
Then, the operator searches for a block having the same function name as the required function, as in the case of the above (2) modified design.

However, since the circuit information database is created for each device, substrate, etc., there may be a plurality of similar functions. Therefore, the operator finds a block having a similar function name from the list, visually confirms the contents of each block, and searches for a block suitable for diversion. In addition, at the time of this search, the diversion history of the block (which block was created based on which block, and which block has been diverted) is checked. This is, for example, to find the first created block when only basic functionality is needed, or to find the last created block when the latest one is needed. Because of the reason.

When the block to be diverted is decided, the operator instructs the input editing device 20 to the block to be diverted, and the block data of the diverted source is copied to the diverted destination by this instruction. After that, the operator creates a circuit, searches for a circuit that can be reused in the circuit information storage unit 42 by the same method as above, and reuses the circuit, as in the case of a new design. Proceed.

Next, with respect to such a system, the diversion destination of the block can be easily searched in the modified design work, and the diversion history of the block can be easily searched in the diversion design search work. An example will be described.

<< Structure of the Embodiment >> As shown in FIG. 1, the circuit design support system of this embodiment comprises a plurality of input editing devices 100 (100-1 to 100-n), a communication line 200,
The circuit information database device 300 is included.

The input editing device 100 is a device designed by the operator, and like the device shown in FIG. 3, the input / output control unit 101, the central processing unit 102, the database access unit 103, the keyboard 104, the mouse 105, and The diversion destination display control unit 1 is provided with the display 106.
07 and the diversion source display control unit 108. Since the input editing apparatuses 100-1 to 100-n have the same configuration, they will be described as one input editing apparatus 100.

The input / output control unit 101 is similar to the input / output control unit 21 of the apparatus shown in FIG.
5, which has a function of connecting an input device such as 5 and a display 106 such as a CRT to control them, receives an instruction from an operator through a keyboard 104, a mouse 105, or the like, and transmits the instruction to the central processing unit 102. It is a thing.

The central processing unit 102 is an input / output control unit 101.
The graphic data is generated based on the information from the input / output controller 1
It is displayed on the display 106 via 01. In addition, the central processing unit 102, based on the design change request and the diversion history search request from the operator, the database access unit 10
3 has a function of requesting acquisition or registration of circuit design data from the circuit information database device 300, requesting a diversion destination or a diversion source search.

The diversion destination display control unit 107 displays the circuit design data of the diversion destination extracted by the diversion destination search unit 304 of the circuit information database device 300, which will be described later, on the display 106.
It is a control unit for controlling display. The diversion source display control unit 108 is a control unit that controls the display 106 of the diversion source circuit design data extracted by the diversion source search unit 305, which will be described later, of the circuit information database device 300. The database access unit 103 has a function of controlling access to the circuit information database device 300 via the communication line 200 according to an instruction from the central processing unit 102.

The communication line 200 is composed of an analog public line or a digital dedicated line, and connects the plurality of input editing devices 100 and the circuit information database device 300 by communication.

The circuit information database device 300 is a device for storing circuit design data in management units, and is composed of a database input / output control unit 301, a circuit information storage unit 302, and a diversion history search unit 303. The diversion history search unit 303 includes the diversion destination search unit 304 and the diversion source search unit 3.
It is equipped with 05.

The database input / output control unit 301 is connected to the communication line 200, and is connected to the circuit information database device 30.
It has a function of a communication control device for controlling input / output as 0. Also, the database input / output control unit 301
Outputs the circuit design data already stored in the circuit information storage unit 302 or receives the received circuit design data in response to a request from the input editing apparatus 100.
02, a diversion destination search request or a diversion source search request from the input editing apparatus 100 is received, the request is transmitted to the diversion destination search unit 304 or the diversion source search unit 305, and the search result is displayed. It has a function of receiving and outputting to the input editing apparatus 100.

Similar to the circuit information database device 40 shown in FIG. 3, the circuit information storage unit 302 has circuit design data 306 (306-1 to 306-) in design units (devices, boards, LSIs, etc.) as management units. n) is stored.

FIG. 6 shows each circuit design data 306.
It is a block diagram of -1 to 306-n. Circuit design data 30
6 includes a block diagram data storage unit 307, a circuit diagram data storage unit 308, a component table data storage unit 309, and a document data storage unit 310.

The block diagram data storage unit 307 comprises a block diagram management data storage unit 307a and a block graphic data storage unit 307b.
Reference numeral 07a denotes a function name storage unit 311 and a drawing number storage unit 31.
2, upper block drawing number storage unit 313, diversion destination storage unit 314, diversion source storage unit 315.

Similar to the block diagram data storage unit 44 shown in FIG. 4, the function name storage unit 311 to the upper block drawing number storage unit 313 are used to identify the data indicating the functional characteristics of the block and each drawing. The drawing number data of and the drawing number of the upper block are stored.

The diversion destination storage unit 314 stores diversion destination data indicating which circuit design data the circuit design data 306 has been diverted to, that is, the diversion destination drawing number.
The diversion source storage unit 315 stores the circuit design data 30.
The diversion source data indicating from which circuit design data 6 is diverted is stored by the drawing number of the diversion source. Also,
The block graphic data storage unit 307b stores actual graphic data, and further includes the circuit diagram data storage unit 3
08, the component table data storage unit 309 and the document data storage unit 310 are the circuit diagram data storage unit 4 of FIG.
5, it has the same functions as the component table data storage unit 46 and the document data storage unit 47.

Returning to FIG. 1, when the diversion destination search unit 304 of the diversion history search unit 303 receives a change instruction to any circuit design data or a diversion history search request, the diversion destination storage unit 314.
Has a function of searching all the circuit design data stored in the circuit information database device 300 based on the diversion destination data stored in, and extracting the circuit design data in which the circuit design data is diverted. There is. Further, when the diversion source search unit 305 receives a diversion history search request for arbitrary circuit design data, the diversion source search unit 305 stores the diversion source data in the circuit information database device 300 based on the diversion source data stored in the diversion source storage unit 315. It has a function of retrieving all the circuit design data and extracting the circuit design data which is a diversion source of the circuit design data.

Next, the operation of this embodiment will be described. << Operation of the Embodiment >> Since the new design is similar to the operation of the system having the basic configuration described above, the description thereof is omitted here, and the modified design and the divert design will be described. (1) In the case of modified design First, when a block is diverted, the drawing number of the diversion destination is extracted in advance and is registered in the diversion destination storage unit 314 of the circuit design data 306 which is the diversion target. .

FIG. 7 is a flow chart showing this operation. First, a diversion command is accepted from the operator (step S1). That is, the operator uses the keyboard 1
04 or the mouse 105 is operated to input a diversion command into the input editing apparatus 100. Next, a new drawing number is obtained (step S2), a new drawing is prepared, and the drawing number obtained in step S2 is added to this drawing (step S2).
3). Then, the drawing number to be diverted is accepted, and the diversion source block is copied to the newly prepared drawing (step S
4). After that, the diversion source storage unit 315 of the diversion source block
The drawing number obtained in step S2 is registered (step S5).

Since the modified design method and the registration of the drawings after the modification are the same as those of the system having the above-mentioned basic configuration, the description thereof is omitted here.

Next, a method of performing the modified design will be described. FIG. 8 is a flowchart showing this operation. First, a change command is received from the operator (step S1). Next, the drawing number to be changed is accepted from the operator (step S2). As a result, the central processing unit 102 of the input editing apparatus 100 requests the circuit information database apparatus 300 to acquire the circuit design data 306 of the received drawing number, and the circuit information database apparatus 300 responds to this acquisition request. The circuit design data 306 of the corresponding drawing number is sent to the input editing device 100.
Then, the input editing device 100 uses the circuit design data 3
06 is received and displayed on the display 106, and the operator changes the circuit data (step S
3).

When the modified design is completed, the input editing device 10
0 refers to the circuit information database device 300 and uses the drawing number received in step S2 as the diversion destination search unit 3
04 is notified (step S4). Diversion destination search unit 304
Is a "variable KENS" that constitutes the variable part when performing a search.
The drawing number accepted in step S2 is registered in "AKU" (step S5).

Then, the diversion destination retrieval unit 304 takes out one of all the circuit design data 306-1 to 306-n (step S6) and draws the drawing number and the variable stored in the drawing number storage unit 312. The drawing numbers registered in KENSAKU are compared (step S7). That is, it is compared whether the extracted circuit design data 306 is the circuit design data 306 of the drawing number to be changed.

If the drawing numbers do not match in step S7, the circuit design data 306 is sequentially fetched, and the circuit design data 306 (that is,
The circuit design data of the changed drawing) is taken out (step S8). When the changed circuit design data 306 is extracted, it is determined whether or not there is data (= drawing number of the diversion destination) in the diversion destination storage unit 314 (step S9).

In step S9, if there is data, the contents of the variable KENSAKU are first stored in a table not shown, and then the diversion destination storage unit 314 is stored.
Copy the data of the above into the variable KENSAKU (step S
10) From the circuit design data 306, this variable KENS
Repeat searching for the same drawing number as AKU. Then, in step S9, when there is no data in the diversion destination storage unit 314, the diversion destination search unit 304 inputs the contents of the table into the diversion destination display control unit 104 of the input editing apparatus 100.
(Step S11), and the modified design work is completed.

Further, when the input / editing apparatus 100 receives the diversion destination data, the contents are displayed on the display 106. As a result, all the diversion destinations of the drawings for which the modified design has been performed are extracted, and the operator does not need to perform an operation of finding the diversion destination while checking the drawings one by one.

(2) In the case of diversion design First, when the circuit design data 306 is diverted in advance, the drawing number of the diversion source is extracted and stored in the diversion source storage unit 315 in the diverted circuit design data 306. A system for registering the drawing number of the diversion source is added to this system.

FIG. 9 is a flow chart showing this method. First, a diversion command is received from the operator (step S1). Next, a new drawing number is obtained, a new drawing is prepared, and the obtained drawing number is given to this drawing (step S2). Then, the drawing number of the diversion source is received from the operator (step S3), and the circuit design data 306 having the drawing number received from the operator is copied to the newly prepared drawing (step S4). After that, the drawing number accepted in step S3 is registered in the diversion source storage unit 315 in the copied circuit design data 306 (step S5).

Next, a method for carrying out the diversion design will be described. FIG. 10 is a flowchart showing the method.
First, a diversion search command is received from the operator (step S1). Next, the diversion history search unit 303
A list of blocks is displayed (step S2). And
From this, when the operator designates a drawing number for which the diversion history is to be checked, the diversion history search unit 303 accepts it (step S3).

After that, the received drawing number is notified to the diversion destination search unit 304 and the diversion source search unit 305 (steps S4 and S5). The diversion destination search unit 30
Regarding the operation after notifying to No. 4, shift to A in FIG.
The process from step S5 of FIG. 8 is performed to obtain the circuit design data 306 of the diversion destination (step S6). On the other hand, in the diversion source search unit 305 that received the notification, first, the variable KENS
The accepted drawing number is registered in AKU (step S
7). Then, the diversion destination search unit 30 described above with reference to FIG.
Similarly to the operation of No. 4, circuit design data 306-1 to 306
-N is taken out one by one (step S8) and compared with the drawing number of the variable KENSAKU (step S).
9).

If the comparison result is different in step S9, the next circuit design data 306 is examined and the variable KENSA is used.
The circuit design data 306 equal to KU is extracted (step S10). When the equivalent circuit design data 306 is extracted, it is checked whether or not there is data (= drawing source drawing number) in the diversion source storage unit 315 (step S11). If there is, the content of the variable KENSAKU is shown. It is stored in the table not stored, the data in the diversion source storage unit 315 is copied to the variable KENSAKU, and the same drawing number as the variable KENSAKU is searched for in the circuit design data 306, which is repeated (step S12).

When there is no more data in the diversion source storage unit 315, the contents of the table are sent to the diversion source display control unit 108 of the diversion history display control unit 109 of the input editing apparatus 100 (step S13). As a result, the diversion history display control unit 109 sends the diversion destination display data by the diversion destination display control unit 107 and the diversion source display data by the diversion source display control unit 108 to the display 106 to display the diversion history.

The operator determines the circuit design data to be diverted by referring to the display of the diverted history. After this, the same processing as the diversion of the circuit design data described above is performed.

As described above, when the diversion design is carried out, the operation of displaying the block diversion history on the display and extracting it is not necessary at all, and therefore, the burden on the operator can be reduced and the accuracy can be improved. It is possible to obtain a proper diversion history.

[0064]

As described above, according to the circuit design support system of the present invention, the circuit design data of the management unit can be
The data indicating the diversion destination of the circuit design data is stored,
When a change instruction is given to arbitrary circuit design data, the divert circuit design data is extracted based on the diversion destination data, so that the diversion destination can be easily searched.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of a circuit design support system of the present invention.

FIG. 2 is an explanatory diagram of various data handled by the circuit design support system of the present invention.

FIG. 3 is a configuration diagram of a basic circuit design support system.

FIG. 4 is a configuration diagram of circuit design data in a basic circuit design support system.

FIG. 5 is an explanatory diagram of a relationship between a one-circuit data storage unit and a hierarchical structure of blocks in a basic circuit design support system.

FIG. 6 is a configuration diagram of circuit design data in the circuit design support system of the present invention.

FIG. 7 is a flowchart of a registration operation of a diversion destination storage unit in the circuit design support system of the present invention.

FIG. 8 is a flowchart of change design work in the circuit design support system of the present invention.

FIG. 9 is a flowchart of a registration operation of a diversion source storage unit in the circuit design support system of the present invention.

FIG. 10 is a flowchart of history search at the time of diversion design in the circuit design support system of the present invention.

[Explanation of symbols]

 100 input editing device 300 circuit information database device 302 circuit information storage unit 304 diversion destination search unit 305 diversion source search unit 306 circuit design data 314 diversion destination storage unit 315 diversion source storage unit

Claims (2)

[Claims] 1. A circuit design support system including a circuit information database device for storing circuit design data in management units, wherein the circuit design data provided in each of the management units is diverted to which circuit design data. If a diversion destination storage section indicating whether or not, and an instruction to change to any circuit design data is received, based on the diversion destination data stored in the diversion destination storage section,
A circuit design support comprising: a diversion destination search unit that retrieves all circuit design data stored in the circuit information database device and extracts circuit design data in which the circuit design data is diverted. system. 2. A circuit design support system including a circuit information database device for storing circuit design data in management units, wherein the circuit design data provided in each of the management units is diverted to which circuit design data. A diversion destination storage unit that indicates whether or not the circuit design data of the management unit is provided, and a diversion source storage unit that indicates from which circuit design data the circuit design data has been diverted; When a history search request is received, based on the diversion destination data stored in the diversion destination storage unit, all circuit design data stored in the circuit information database device is searched, and the circuit design data is reused. If a diversion destination search unit that extracts the circuit design data, and a diversion history search request for the arbitrary circuit design data is received, Based on the diversion source data stored in the diversion source storage unit, all the circuit design data stored in the circuit information database device are searched, and the circuit design data serving as the diversion source of the circuit design data is extracted. A circuit design support system comprising a diversion source search unit.