JPH0520392A - LSI system design support device - Google Patents

Abstract

(57) [Summary] [Purpose] The purpose is to modify design data quickly and accurately to improve workability. [Structure] From the specified new one or more blocks, the blocks forming the whole, and the signal connection relationship,
Designing the specified block as a new block, creating design data for the specified block, creating design data for the non-designated block and design data for the non-designated block, and connecting the designated block and the non-designated block The block division creating unit 14 for creating data is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a design support device used for design development of an LSI system.

[0002]

2. Description of the Related Art Conventionally, this type of design support device has been used for LS.
When designing and developing an LSI system including I or a plurality of LSIs, the entire circuit is divided into blocks that perform each function, and the blocks are divided into smaller blocks for hierarchical design. And in such block division,
At the time of dividing into blocks, the degree of circuit size of the block is predicted, and the block is divided into blocks having a circuit size that is easy to design or blocks that can be accommodated in one LSI chip.

[0003]

However, in the above-mentioned conventional hierarchical design, the circuit scale expected when performing block division in the initial stage does not match the actual circuit scale obtained by the design progress. In many cases. If the expected circuit size and the actual circuit size are significantly different, the initial LSI
The block I was thinking of making it into one chip can no longer fit in one chip, so I have to re-divide the block. Furthermore, LSIs that have already been designed and developed
In the case where the system is redeveloped by using the LSI manufacturing technology having a higher degree of integration, it is necessary to change the already performed block division and perform the block division again. Therefore, there is a problem that workability is reduced.

The object of the present invention is to solve the above-mentioned problems.
The present invention provides a design support device for an LSI system, in which design data is corrected quickly and accurately and workability is improved.

[0005]

In order to achieve the above-mentioned object, the present invention collects a block configuration display section for analyzing a block configuration of an LSI system and a connection relation of signals from design data of the LSI system, and a plurality of blocks. From the block configuration display unit and the block designation display unit that receives the analysis result of the design data from the block configuration display unit, and the connection relation between the designated new block and the blocks that form the whole and signals. The designated block as a new block, design data of the new block is created, design data of the non-designated block and design data of the non-designated block are created, and the new block and the non-designated block are connected. And a block division creating unit for creating design data.

[0006]

According to the present invention, a block division is performed to create design data for a designated block, design data for a non-designated block, and design data for connecting a designated block and a non-designated block. Since the creation unit is provided, the modification of the design data is automated, and the modification of the design data is quick and accurate.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an LSI system design support apparatus according to the present invention will be described below with reference to FIGS.

FIG. 1 is a basic system configuration diagram of the design support apparatus. In the figure, the design support device 11 inputs the hierarchical design data 15 created in advance by the designer and analyzes the hierarchical design data 15 to display, as the block configuration display data 16, a block diagram or a block configuration for displaying a circuit description by text. The display unit 12 and the block designation receiving unit 1 that receives the necessary information of the block configuration display data 16 and the information of the designer's instruction for designating a new block to be summarized.
3 and the block designated on the basis of the above information output from the block designation receiving unit 13 is set as a new block, design data of the block is created, and a block other than the designated block is set as a new block, and the design of the block is performed. It is composed of a block division creating unit 14 that outputs design data 18 that is additionally modified by creating data and design data that connects these newly created blocks.

Next, the operation of the design support device having such a configuration will be described.

First, the hierarchical design data 15 is analyzed by the block configuration display unit 12, and the block configuration display data 1
As 6, a block configuration diagram of the module M1 as shown in FIG. 2 and a circuit description in text as shown in FIG. 3 are obtained. In FIG. 2, the module M1 includes a sub block MA to which the external input terminal I1, the external bidirectional terminal B1 and the external output terminal O1 are connected, and a sub block MB to which the external input terminal I2 and the external bidirectional terminal B1 are connected. , External input terminal I3 and external bidirectional terminal B
2, a sub block MC connected to B3, a sub block MD connected to an external input terminal I4 and an external output terminal O2, a sub block connected to an external input terminal I5, an external output terminal O3, and an external bidirectional terminal B3. Block M
It is composed of E and E. Furthermore, the sub-block MA,
MBs are connected by an internal signal S1 and sub-blocks MB, M
C is connected by an internal signal S2, and sub-blocks MA and MD
Are connected by an internal signal S3, and sub-blocks MB, MD,
ME is connected by internal signals S4 and S6, and sub-blocks ME and MC are connected by internal signal S5.

Here, the sub-block M as shown in FIG.
A, MB, and MC are made into a module M11 of one integrated block, and further, a sub-block M as shown in FIG.
Module M12 of one integrated block of D and ME
Designer's instruction and block configuration display data 16
The block designation receiving unit 13 receives the required data of the above.
Then, as shown in FIG.
Creates new modules M11 and M12 as sub-blocks based on the designer's instruction and the block configuration display data 16 and then connects them to create a modified and modified module M1.

That is, the block division creating unit 14 sets a block designated by the designer's instruction from the block designation receiving unit 13 as a new block, creates design data of the block, and creates a block other than the designated block as a new block. A block is created, design data for the block is created, and design data for connecting these newly created blocks is created.
Is output.

In this case, in the module M11, the external input terminals I4, I5 and the external output terminals O2, O3 of the module M1 are eliminated, and the external bidirectional terminal B3 of the module M1 becomes an external input terminal. Further, the internal signals S3, S4, S5 of the module M1 serve as an external input terminal and an external bidirectional terminal.

Further, in the module M12, the external input terminals I1, I2, I3 and the external bidirectional terminals B1, B2 of the module M1 are eliminated, and the internal signals S3, S4, S5 of the module M1 are external output terminals and external bidirectional terminals. Becomes

FIG. 7 is a diagram showing an example of the text description of the module M11, and FIG. 8 is a diagram showing an example of the text description of the module M12. FIG. 9 is a diagram showing a text description of the changed module M1.

[0016]

As described above, according to the present invention, design data of a designated block is created, design data of a non-designated block is created, and the designated block and the non-designated block are connected. Since the block division creating unit for creating the design data is provided, the modification of the design data is automated. Therefore, the design data can be corrected quickly and accurately, and the workability can be improved.

[Brief description of drawings]

FIG. 1 is a basic system configuration diagram of a design support device of the present invention.

FIG. 2 is a block diagram of a module M1.

FIG. 3 is a diagram illustrating an example in which a text description of a module M1 is performed.

FIG. 4 is a block diagram of a module M11.

FIG. 5 is a block diagram of a module M12.

FIG. 6 is a block diagram of a modified module M1.

FIG. 7 is a diagram illustrating an example in which a text description of a module M11 is performed.

FIG. 8 is a diagram illustrating an example in which a text description of a module M12 is performed.

FIG. 9 is a diagram showing a text description of a changed module M1.

[Explanation of symbols]

 11 Design Support Device 12 Block Configuration Display Unit 13 Block Designation Accepting Unit 14 Block Division Creating Unit 15 Design Data 16 Block Configuration Display Data 18 Added / Modified Design Data

Claims (1)

Claim: What is claimed is: 1. A block configuration display section for analyzing a block configuration of an LSI system and a connection relation of signals from design data of the LSI system, information for collectively designating a plurality of blocks and a new block, and From the block designation receiving unit that receives the analysis result of the design data from the block configuration display unit, the designated new block and the block forming the whole and the connection relationship of the signals, the designated block is a new block, Block division creation for creating design data of the new block, creating design data of the non-designated block and design data of the non-designated block, and creating design data for connecting the new block and the non-designated block And an LSI system design support device.