IC chip tester using compressed digital test data and a method for testing IC chip using the tester
First Claim
1. A tester for testing an IC chip using test data consisting of a plurality of test vectors, the tester comprising:
- a pin memory for storing a plurality of test blocks, the test blocks each of which is a combination of at least one test vector among the test vectors and is repeated at least one time in the test data;
a sequencer memory for storing information about a designation order of the test blocks for restoring the test data; and
a driving part for driving the pin memory so that the test blocks stored in the pin memory are output successively according to the designation order stored in the sequencer memory.
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Accused Products
Abstract
Disclosed are a tester for testing an IC chip using test data consisting of many test vectors and a method for testing an IC chip using the tester. The tester has a pin memory, a sequencer memory, and a driving part. The pin memory stores many data blocks. Each of the test blocks is a combination of one or more test vector, and is repeated at least one time in the test data. The sequencer memory stores information about a designation order of the test blocks for restoring the test data. The driving part drives the pin memory so that the test blocks stored therein are output successively according to the designation order stored in the sequencer memory. The tester does not require an additional CPU, and the programming therefor is simple.
37 Citations
6 Claims
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1. A tester for testing an IC chip using test data consisting of a plurality of test vectors, the tester comprising:
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a pin memory for storing a plurality of test blocks, the test blocks each of which is a combination of at least one test vector among the test vectors and is repeated at least one time in the test data; a sequencer memory for storing information about a designation order of the test blocks for restoring the test data; and a driving part for driving the pin memory so that the test blocks stored in the pin memory are output successively according to the designation order stored in the sequencer memory. - View Dependent Claims (2, 3, 4, 5)
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6. A method for testing an IC chip using test data consisting of a plurality of test vectors, the method comprising the steps of:
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determining a plurality of test blocks, the test blocks each of which is a combination of at least one test vector among the test vectors and is repeated at least one time in the test data; setting a designation order of the test blocks for restoring the test data; restoring the test data by outputting the test blocks successively according to the designation order; inputting the restored test data to the IC chip; and judging whether the IC chip is normal or not by comparing output data of the IC chip caused by the test data with reference data.
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Specification