JPH039476A - Pull-up element leakage detecting system - Google Patents

Abstract

PURPOSE:To reduce the manhour of a designer and the generation of artifical misses by providing a means for detecting the leakage of pull-up elements and automatically checking pull-up element leakage detection for all net information. CONSTITUTION:The pull-up element leakage detecting system is provided with a means 16 for detecting the leakage of pull-up elements while referring design rule information previously determined by the series sorts of parts constituting a logic circuits, a means 17 for detecting the leakage of pull-up elements while referring to design rule information previously determined by the parts name of parts and a means 18 for detecting the leakage of pull-up elements while referring to design rule information previously determined by the pin attributes of parts, to detect each leakage in each net of logic circuit information. Consequently, the detection of pull-up element leakage can be automated, the generation of misses can be prevented and the manhour can be reduced.

Description

TECHNICAL FIELD The present invention relates to a pull-up element leakage detection method, and more particularly to a method for detecting pull-up element leakage in a logic circuit with reference to design rules.

In a prior art logic circuit diagram, a pull-up element (consisting of a resistor element) may be required depending on the input/output relationship of each logic gate. It is necessary to check whether this pull-up element is installed correctly according to the design rules, but conventionally, the designer himself visually checks the logic circuit diagram and refers to predetermined design rules to determine the pull-up element. Up element leakage is detected.

In this conventional method, the designer visually checks the circuit diagram himself/herself, which has the disadvantage of causing errors and increasing the number of man-hours.

Purpose of the Invention The present invention has been made to solve the drawbacks of the prior art, and its purpose is to automate the detection of pull-up element leakage to prevent mistakes from occurring; An object of the present invention is to provide a pull-up element leakage detection method that enables reduction of man-hours.

Structure of the Invention According to the present invention, there is provided a pull-up element leakage detection method for detecting leakage in a pull-up element using logic circuit information and design rule information. means for detecting leakage from the pull-up element while referring to predetermined design rule information; means for detecting leakage from the pull-up element while referring to design rule information predetermined based on the component name of the component; means for detecting leakage of the pull-up element while referring to design rule information predetermined according to the pin attributes of the component, and each of the above-mentioned detections is performed for each of the logic circuit information. A pull-up element leakage detection method characterized by the following is obtained.

Embodiments Below, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a system block diagram of an embodiment of the present invention.

In the figure, 11 is an input device, 12 is an output device, 13 is an arithmetic processing unit, 14 is a data storage device, and 15 is a pull-up element leak detection mechanism.

This pull-up element leak detection mechanism 15 is realized by hardware and software, and its functions are divided into three parts as shown in the figure. That is, there is a part 16 that detects pull-up element leakage based on the series type of the component, a part 17 that detects pull-up element leakage based on the component name, and a part 17 that detects pull-up element leakage based on the input/output attributes of the pin of the component. It consists of a portion 18.

FIG. 2 is a flowchart showing the operation of the pull-up element leak detection mechanism 15 in the embodiment of FIG. 1, FIGS. 3(A) to 3(C) show examples of circuit information, and FIG. ~
(c) shows an example of design rule information.

3(A) and (a) are the circuit information and design rule information by component series name referenced by the detection unit 16, and FIGS. 3(B) and (b) are the circuit information and design rule information referenced by the detection unit 17. This is circuit information and design rule information based on component names. 3C and 3C show circuit information and design rule information based on component pin input/output attributes referenced by the detection unit 18.

These circuit information and design rule information are inputted from the input device 11, processed by the arithmetic processing device 13, and the results are stored in the data storage device 14. The stored information is shown as logic circuit information 20 and design rule information 21 in FIG.

First, in step 22, logic circuit information 20 to 1
Internet information is extracted. Here, the net information is the connection information of the part where the input/output pins of the circuit elements are commonly connected as shown in Fig. 3 (A) to (C), and in Fig. 3, net-A, net-B .

C.

In step 23, regarding the extracted net, the series type (third
In Figure (A), IC, ALS, LS, etc.) are compared to Figure 3 (a).
) The necessity of pull-up is checked based on the design rule information. The design rule information includes the net
- Whether or not a pull-up element is necessary for the component series type in A is determined in advance (required is indicated by an X mark, non-required is indicated by an O mark). Yo.

Then, in step 24, it is determined whether pull-up is necessary or not with reference to this rule information.

If it is determined that pull-up is not necessary, control is passed from the detection unit 16 to the detection unit 17, and in step 25, leakage detection of pull-up elements is performed for the same net based on the name of the component. In this case, as shown in FIG. 3(B) (in FIG. 3(B), for example, another net net-B
) All components connected to the net P54. LSOO, LSO4, Al3O3, etc. are checked in step 26 according to the design rule information of the net portion.

If it is determined that pull-up is not necessary, control is passed from the detection unit 17 to the detection unit 18, and in step 27, pull-up element leakage detection is performed for the same net based on the pin output attribute of the component.

In this case, as shown in Figure 3 (C) (Figure 3 (C) is shown for another net net-C as an example), the input/output attributes of the pins of the components connected to the net is checked in step 28 according to the design rule information of the net portion.

In each step 24, 26 and 28, if a pull-up is required, a check is made in step 29 for the presence of a pull-up element, and if there is no pull-up element, an error message is sent in step 30 indicating that the pull-up element is leaking. will be generated and displayed on the output device 12.

If it is determined in step 29 that the pull-up element is connected, the process returns to net extraction step 22, another unextracted net is selected, and the same process is performed thereafter. This is repeated sequentially for all nets and ends.

The reason why the pull-up element leakage check is performed for each net based on the parameters of the component series type, component name, and human output pin attribute is that the necessity of a pull-up element differs depending on each of these parameters.

Effects of the Invention As described above, according to the present invention, it is possible to automatically check for pull-up element leakage on all network information, thereby reducing designer's man-hours and human errors. This has the effect of making it possible.

[Brief explanation of drawings]

FIG. 1 is a system block diagram of an embodiment of the present invention, FIG. 2 is an operation flow diagram of an embodiment of the present invention, and FIG. 3 is an example of circuit information and design rule information regarding pull-up elements for each net information. Figure shown. Explanation of symbols of main parts

Claims (1)

[Claims] (1) A pull-up element leakage detection method that detects leakage of a pull-up element using logic circuit information and design rule information, the design rule information being predetermined according to the series type of the components that constitute the logic circuit. means for detecting leakage in a pull-up element while referring to the component name of the component; means for detecting leakage in the pull-up element while referring to design rule information predetermined by the component name of the component; A means for detecting leakage in a pull-up element while referring to predetermined design rule information, and each of the above-mentioned detections is performed for each net of the logic circuit information. Detection method.