JPH02189684A - Circuit drawing display system - Google Patents

Abstract

PURPOSE:To easily execute logical division at the time of LSI formation by retrieving the sorts of signal lines, the number of signal lines, the sorts of circuit elements, and the number of circuit elements in a specific range in an objective circuit drawing and displaying data relating to the number of signal lines and the circuit size of the circuit elements on an appropriate position of a screen based upon the retrieved results. CONSTITUTION:The signal lines 13a to 13k inputted/outputted from/to the specific range 14 specified in the displayed circuit drawing are retrieved to find out the sorts and number of these signal lines and the circuit elements 12a to 12g existing in the specific range 14 are retrieved. The number of elements constituting the circuit elements is converted and data relating to the number of signal lines and the circuit size of the circuit elements are displayed on an appropriate position 15 of the screen 11 together with the objective circuit drawing. Consequently, the number of pins or the circuit size necessary for the formation of LSI can be easily grasped and logical division information can be simply informed.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a circuit drawing display method, and particularly relates to a circuit drawing display method for displaying a circuit drawing such as a logic circuit using a combicoater system. It is something.

[Prior Art] A conventional general device for displaying a target circuit diagram on a display screen using a computer/system will be described with reference to FIG. 4 showing a block diagram thereof. In this Fig. 4, (1) is the display device itself, (2) is a CRT (cathode ray tube) for displaying circuit diagrams, and (3) is a device for inputting necessary commands and drawing data into the display device body (1). (4) is a mouse that specifies the coordinate position on the screen of CRT (2), and (5) is an external device consisting of a magnetic disk device, etc. that stores drawing data corresponding to various circuit elements and circuit drawings. It is a storage device.

What constitutes the display device body (1) is a CPU (6)
, ROM (7) and RAM (8) in which programs and data processed by the CPU (6) are stored, CRT (
2) a CRT controller (9) for controlling the
Keyboard (3), mouse (4) and external storage device (5)
) is an I10 interface (1o) that controls the input/output interface of the I/O interface. These various means are connected to each other by an internal bus (la).

FIG. 5 illustrates a logic circuit diagram displayed on the screen (11) of the CRT (2). In this FIG. 5, (12a) and (12b) are buffer circuits, (12
c) (12d) and (12f) are negative circuits, (12e)
The JK type rough flip-flop circuit (12g) is a NAND circuit.

Corresponding terminals of these circuit elements are connected by signal lines (13a) to (13k).

Next, the operation of the conventional device configured as described above will be explained.

First, when a predetermined command is entered manually from the keyboard (3), this command is transmitted to the CPU (6) via the I10 interface (10). CPU (6) is RO
The command is interpreted by a corresponding program stored in M (7), and necessary instructions are given to the CRT controller (9) and 110 interface (10) based on the result of the interpretation.

Here, when a command for reading drawing data regarding circuit elements (12a) to (12g) from the external storage device (5) is input from the keyboard (3), drawings relating to these circuit elements (12a) to (12g) are input. data is 17
External storage device (5) via 0 interface (10)
is read out from the CRT (2) and placed at a desired coordinate position on the CRT (2) using the mouse (4).

Next, a command to draw a line segment is input from the keyboard (3), and the signal lines ( 13a) to (13k).

Through the above operations, the logic circuit diagram illustrated in FIG. 5 is drawn on the screen (11) of the CRT (2). Further, by using a predetermined write command, corresponding drawing data is written to the external storage device (5).

[Problems to be Solved by the Invention] In the conventional example described above, a desired circuit diagram is created by arranging target circuit elements on a screen and connecting terminals of the circuit elements with line segments. It simply displays information such as the type and number of signal lines going in and out of this area, and the scale of the circuits that make up each circuit element, within a specified range of the circuit diagram displayed on the screen. To know this, first, you must visually count the type and number of signal lines that go in and out of a specific range on a display screen such as a CRT, without duplication, and also calculate the number of circuit elements within that specific range. Since it is necessary to accurately count the number of transistors visually and convert it to the number of transistors required for the configuration of the circuit element, it is necessary to accurately count the number of transistors by visual inspection. With the use of UFF, the task of determining the type and number of signal lines to be used, the scale of the circuit, etc. has become complicated, and there has been a problem in that it requires an extremely large amount of effort and time.

This invention has been made to solve the above-mentioned problems, and the invention is directed to the type and number of signal lines that enter and exit a specific range specified in a circuit diagram displayed on a display device such as a CRT. In addition to being able to easily know the circuit scale of circuit elements existing within a specific range, for example, when converting a logic circuit into an LSI, it becomes easy to understand the required number of pins, circuit scale, etc. , LSI as above
The purpose of the present invention is to obtain a circuit drawing display method that allows easy understanding of logical division information when converting into a computer.

[Means for Solving the Problems] The circuit drawing display method according to the present invention is a method for displaying a corresponding circuit drawing based on required manual data: The first method for searching for the type and number of signal lines entering and exiting the specified range and the type and number of circuit elements existing within the specified range.
and a second means for detecting data regarding the number of signal lines and the circuit scale constituting the circuit elements based on the search results and displaying the detected data at an appropriate location on the screen.

[Operation] In this invention, the signal lines entering and exiting a specified range specified in the displayed circuit diagram are searched to determine the types and number of these signal lines, and the number and types of signal lines existing within the specified range are determined. A circuit element is searched for, the number of constituent elements of the circuit element is converted, and the number of signal lines and data regarding the circuit scale of the circuit element are displayed at an appropriate location on the screen together with the target circuit drawing.

[Example] The circuit diagram display method of the present invention will be explained below based on the example.

FIG. 1 is a flowchart showing the operation sequence of main parts of a program applied to the circuit diagram display method according to the present invention. The hardware configuration to which this program is applied is similar to the conventional device shown in FIG. 4, but the step (SIO) as shown in FIG. The program consisting of (S19) to (S19) is executed, and the signal line table shown in FIG. 3(A) and the circuit element number table shown in FIG. 3(B), which will be described later, are stored in the RAM (8). Therefore, the above-mentioned conventional device is essentially used.

FIG. 2 illustrates a circuit diagram (11) displayed on a CRT based on the above embodiment. In this Figure 2, (14) is the enclosing line segment of the specific range to be searched in the circuit drawing, and (15) is the search result screen, which shows the type and number of signal lines entering and exiting the specific range. , and the total number of transistors constituting the circuit elements existing within the specific range are displayed at the - corner of the circuit drawing (11).

The signal line table diagram shown in FIG. 3(A) stores the names of signal lines that enter and exit within a specified specific range, their types, their numbers, and the number of signal line inputs and outputs.
The circuit element number table shown in FIG. 3B stores the names of circuit elements existing within a specific range, their number, the number of transistors constituting these circuit elements, and their total number.

Next, the operation of the above embodiment will be explained. Now, as already explained in the operation of the conventional example, it is assumed that the CRT display screen (11) above displays a circuit diagram related to the logic circuit illustrated in FIG. 5 above. .

First, in step (sho), the keyboard (3)
A corresponding program is activated by a predetermined command input from the computer. In the next step (Sll), R
AM (8) Signal line names, signal line types and numbers, total number of input/output times in the signal line table stored in AM (8), circuit element names, numbers and their totals in the number of times element number table, and conversion. The number of transistors and (number x number of transistors) are delimited. In step (SI2),
Enter the command to draw the enclosing line segment (14) manually from the keyboard (3) and draw the displayed circuit diagram (11).
A specific range is designated by surrounding it with the surrounding line segment (14). In the next step (S13), a search process for a signal line that crosses the enclosing line segment (14) is executed as follows. That is, the corresponding signal line name is stored as the signal line name in the signal line table, and the corresponding number of input/outputs is set as I'. Note that if the signal line name is already stored in the signal line table, I' will be added to the corresponding input/output count. Furthermore, the total sum of these signal line names and the total number of input/output times are stored in the number of signal line types and the total number of input/output times, respectively. In the next step (S14), it is determined whether all signal lines crossing the enclosing line segment (I4) have been searched. When the result of this determination is ON, if there is already a signal line to be searched, the process returns to step (S13) and the above-described procedure is repeated. On the other hand, the result of this judgment is YES.
If there is no signal line to be searched, the process moves to the next step (S15).In this step (SI5), within the specific range specified by the enclosing line segment (I4), In the next step (S16), the searched circuit element name is stored as the element name in the circuit element number table, and I' is added as the corresponding number. Also, at this time, regarding the circuit elements stored in the RAM (8), assuming that the circuit elements are constituted by transistors, a search process for the converted number of transistors is executed, and the number of transistors in the circuit element number table is searched. Store as the corresponding number of transistors.Then, multiply the number of circuit elements by the number of transistors, and store this multiplication result as (number x number of transistors) in the circuit element number table.Furthermore, these numbers and The total sum of (number x number of transistors) is stored as each sum in the circuit element number table.The following step (S17
), it is determined whether all the circuit elements within the specific range specified by the enclosing line segment (14) have been searched. If the result of this determination is NO, the process returns to step (S15) and the above procedure is repeated. On the other hand, if the judgment result is YES, step (
Shift to S1g). And this step (Si2)
, read out the type and number of signal lines in the signal line table and the sum of (number x number of transistors) in the circuit element number table, and display these information on the screen (11) of the CRT.
Display (15) in the corner. And the last step (S
In i9), execution of the corresponding command is ended.

Note that although the above embodiment has been described with reference to the case where a converted number by a transistor is used to indicate the circuit scale, the present invention is not limited to this, and for example, a converted number by a gate may be used by using a two-man NAND as a unit gate. Further, the displayed circuit diagram is not limited to a logic circuit, and may be a general analog circuit diagram including a plurality of circuit elements, for example. Further, in the above embodiments, the program used is described as being stored in the RAM, but the program is not limited to this, and of course may be stored in the ROM.

[Effects of the Invention] As explained above, the circuit drawing display method according to the present invention searches for the type and number of signal lines and the type and number of circuit elements within a specific range in a target circuit drawing, and Based on the search results, the data about the number of signal lines and the circuit size of the circuit elements is displayed in the appropriate place on the screen, and the number of signal lines going in and out of the specific range and the circuit size of the circuit elements can be easily determined. And you can know for sure.

For this reason, for example, it has become possible to very easily know the number of bins and circuit scale as necessary data when converting a logic circuit, etc. into an LSI, and the logic partitioning when converting into an LSI as described above can be done. This has the advantage of being easy to implement.

[Brief explanation of the drawing]

FIG. 1 is a flowchart showing the main parts of a program for executing an embodiment of the present invention, FIG. 2 is an example of the CR7 screen displayed in the above embodiment, and FIG. (A) and (B) are respectively illustrative diagrams of a signal line table and a circuit element number table in the above embodiment, and FIG. 4 is a block diagram showing the configuration of a conventional general circuit drawing display device. FIG. 5 is an exemplary diagram of the CR7 screen displayed in the conventional example. (1) is the circuit display device body, (2) is the CRT, (IX)
(12a) to (12g) are circuit elements, (13a) to (13k) are signal lines, (14) is an enclosing line segment surrounding a specific range, and (I5) is a display section for necessary information. Note that the same reference numerals in the figures indicate the same or equivalent parts. Agent Teru Sogado Figure 3 (A) (B)

Claims (1)

[Claims] In a circuit drawing display method for displaying a corresponding circuit drawing based on required input data regarding a target circuit drawing: A first means for searching the type and number of signal lines going in and out and the type and number of circuit elements existing within the specific range; and configuring the number of signal lines and the circuit elements based on the search results. A circuit drawing display method comprising: a second means for detecting data regarding a circuit scale and displaying the data at an appropriate location on a screen.