JPH04305177A - Converting apparatus of test program into test standard table - Google Patents

Abstract

PURPOSE:To enable debug and modification of a test program on the basis of a test standard table by a method wherein test information described in the test program is converted in a complete form into the test standard table. CONSTITUTION:A test program generated automatically by a program generating means 21 on the basis of data from a data input element 1 is downloaded on a tester 4 through a bus 3. The test program is modified by a terminal 41 and sent from the tester 4 to a syntax analysis means 22. The means 22 executes checkup of the syntax of the test program after modification and the systax analysis thereof and converts it into a form (intermediate source) which is easy to process later. Subsequently, this intermediate source is divided by a one-line conversion means 23 to an extent enabling description of it in one line of a test standard table without losing information on a test, and the divided intermediate source is converted into the standard table by a test standard table conversion means 24. This conversion for each one line is repeated and thereby the test standard table is completed.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a test program/test specification table conversion device capable of generating a test specification table from a test program downloaded to an LSI tester. The present invention relates to a test program/test specification table conversion device that can obtain a test specification table by inversely converting a test program modified by a tester.

0002

2. Description of the Related Art An LSI tester is a device that applies a signal to the input terminal of an LSI to measure its performance, and checks the signal from the output terminal to determine whether the LSI to be measured is good or bad. These series of operations are performed based on a test program downloaded to the LSI tester. This test program is generated based on a test specification table that is created so that test settings and the like can be easily viewed.

0003

SUMMARY OF THE INVENTION Such test programs often need to be changed depending on various factors such as the standard and type of LSI to be measured. Conventionally, when you want to change a test program, you can check whether the change was made correctly or not by checking the modified test program on the LSI each time.
The test program was loaded onto the tester and checked by running the LSI tester, making it impossible to modify or debug the test program efficiently.

[0004] The present invention has been made in view of the above points, and provides a method for converting test information written in a test program that has been modified or changed into a test specification table without losing the test information. It is an object of the present invention to provide a test program/test specification table conversion device that can easily and efficiently confirm whether a test program has been corrected and debugged correctly based on a test specification table.

[0005]

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a test program/test specification table conversion device that can convert a test program downloaded into an LSI tester back into a test specification table. And,
While checking the syntax of the test program,
A syntax analysis means for parsing the syntax and converting it into an intermediate source that is easy to process later; and a one-line conversion means for dividing the intermediate source obtained by the syntax analysis means into a range that can be described in one line of the test specification table. and a test specification table conversion means for simulating the setting state of the tester according to the contents of the intermediate source divided by the one-line conversion means and outputting the result to the test specification table. The feature is that it is possible to check the modification results of the test program.

[0006]

[Operation] Each component of the present invention operates as follows. The syntax analysis means performs syntax analysis of the test program input from the tester and converts the test program into intermediate source.

The one-line conversion means divides the intermediate source into a range that can be written in one line of the test specification table so as not to lose test information.

The test specification table converting means outputs the intermediate source, which has been divided line by line by the line converting means, into a test specification table.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 is an explanatory diagram of the configuration of a test program/test standard table conversion device showing one embodiment of the present invention, and here shows the overall configuration of an LSI tester system. In the figure, 1 is a data input section for inputting the data of the test specification table, 2 is a workstation, and the tester 4 is connected via bus 3.
It is connected to the.

In the workstation 2, 21 is an automatic program generation means that downloads a test program automatically generated based on data from the data input section 1 to the tester 4 via the bus 3. do. The test program loaded into the tester 4 is modified by a terminal 41 provided on the tester 4 side, and transferred from the tester 4 to the syntax analysis means 22 provided in the workstation 2.

The syntax analysis means 22 checks the syntax of the modified test program, analyzes the syntax, and converts the test program into a format (intermediate source) that can be easily processed later.

[0012] 23 is a one-line conversion means, and a syntax analysis means 22
The intermediate source of the test program obtained by the method is divided into parts that can be written in one line of the test specification table so as not to lose test information.

Reference numeral 24 denotes a test specification table converting means, which converts the intermediate source divided line by line by the line converting means 23 into a test specification table.

[0014] Here, the test specification table is created as shown in Fig. 2, and one test is entered on each line. For one test, standard values, measurement conditions, delay time, judgment calculation formula, setting calculation formula, and pin conditions can be described, and in this case, tests 1 to 12 are described for device A. Note that the numbers circled in the test specification table indicate the classifications shown in FIG. 5 later.

FIG. 3 shows a test program corresponding to the test specification table shown in FIG. *TNO. 1, 2, and so on correspond to test numbers 1, 2, and so on in the test specification table, and one section separated by a horizontal line corresponds to one test in the test specification table. An example in which the numbers of classifications ■ to ■ are compared for easy understanding is shown for test number 3.

FIG. 4 is a flowchart for explaining the operation of the test program/test specification table conversion apparatus of the present invention for converting a test program back into a test specification table. The syntax analysis means 22 checks the syntax of the test program transferred from the tester to the syntax analysis means 22, parses the syntax, and converts it into a format that is easy to process later (intermediate source).
(step (1)).

The one-line conversion means 23 divides the intermediate source into a test specification table within the range that can be written in one line so as not to drop the test conditions written in the test program when converting the intermediate source into the test specification table (step ( 2) ).

The test specification table conversion means 24 simulates the setting state of the tester according to the contents of the intermediate source converted into one line (step (3)).
Output the test conditions to be written in one line of the test specification table based on the test results to the test specification table (step (4)
).

Steps (3) to (4) are repeated for each line of the intermediate source test specification table to complete the test specification table. Note that if parallel and simultaneous measurements are performed to shorten measurement time, it is necessary to output the data in multiple lines when outputting it to the test specification table (step (4)).

FIG. 5 is an explanatory diagram specifically showing a rule for converting one line of intermediate source. Test program statements can be classified into the following categories 1 to 2, and if they are written in the order of 2, 2, etc., they can be converted into one line.

■Setting calculation formula (when calculation is required to specify the test conditions) ■Setting the test conditions (setting the signal applied to the device) ■Waiting time (time required for settling of the tester and device) ■Measurement (measurement using a tester) ■Judgment calculation formula (when calculation is required to obtain a judgment value from the measurement results) ■Judgment (pass/fail judgment)

FIG. 6 is a flowchart illustrating the operation of the one-line conversion means explained in FIG. 5. If no statement has been written before, i.e. if the statement is the first in the test program,
Set the previous statement = none (step (10)
). Read statement 1 from the intermediate source (step (11)).

If this statement cannot be read at the end of the program, the one-line conversion ends here (step (12)). If statement 1 has been read, it is determined whether the read statement 1 falls into one of the classifications (1) to (2) (step (13)).

It is determined based on the rules of FIG. 5 whether the statement 1 whose classification has been determined can be written in one line of the test specification table together with the statement 0 read just before (step (14)). For example, if the previous statement is None, statement 1 can be any of ■ to ■, but if statement 0 is classified as ■, statement 1 is classified as ■ to ■. ■Unless it is one of the above, it cannot be written on one line.

If it cannot be written in one line of the test specification table, the test program is divided before the read statement 1 (step (15)). For example, TN in Figure 3
The case shown in O 6 is an example of this. If it can be written in one line of the test specification table, the classification of statement 1 is held as the classification immediately before statement 2 to be read next (step (16)). Note that this function can also be applied to a tool for converting test programs between different types of testers.

[0026]

Effects of the Invention As explained in detail above, the test program/test standard table conversion device of the present invention converts test information written in a test program into a test standard table in a complete form by converting one line of test information. It is made to be convertible. Therefore, it has high value as a document, and test programs can be debugged and modified based on the test specification table.

[Brief explanation of drawings]

FIG. 1 is a diagram illustrating the configuration of a test program/test specification table conversion device according to the present invention.

FIG. 2 is a test specification table of the test program/test specification table conversion device of the present invention.

FIG. 3 is a test program corresponding to the test specification table shown in FIG. 2;

FIG. 4 is a flowchart illustrating the operation of the test program/test specification table converting device of the present invention to convert a test program back into a test specification table.

FIG. 5 is an explanatory diagram specifically showing a rule for converting one line of intermediate source.

FIG. 6 is a flowchart illustrating the operation of the one-line conversion means explained in FIG. 5;

[Explanation of symbols]

22 Syntax analysis means 23 Single line conversion means 24 Test specification table conversion means

Claims (1)

[Claims] 1. A test program/test specification table conversion device capable of converting a test program to be downloaded into an LSI tester back into a test specification table, which checks and parses the syntax of the test program. A syntax analysis means that converts the intermediate source into an intermediate source that is easy to process later, and an intermediate source obtained by this syntax analysis means.
a one-line conversion means for dividing the source into a range that can be written in one line of the test specification table;
A test program/test standard characterized in that the test program/test standard is provided with a test standard table converting means for converting the test program into the test standard table and outputting the result to the test standard table. Table conversion device.