Memory tester has memory sets configurable for use as error catch RAM, Tag RAM's, buffer memories and stimulus log RAM
First Claim
1. A method of testing a memory under test on a memory tester, the method comprising the steps of:
- (a) applying the same sequence of transmit vectors to the memory under test and to a work memory within the memory tester, the sequence of transmit vectors causing the storing of test pattern data within the memories to which it is applied, the stored test pattern data in each memory being an end result remaining stored therein after the conclusion of the application of the entire sequence of transmit vectors; and
(b) subsequent to the conclusion of step (a), comparing the test pattern data content of the memory under test with the test pattern data content of the work memory.
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Accused Products
Abstract
The various functions that are desirable for interior test memory within a memory tester are implemented in Memory Sets each serving as the host for one or sometimes more of such functions. For certain classes of testing a portion of interior test memory can be used as a Stimulus Log RAM that operates as an ideal DUT to create the correct conditions that are to exist in an actual DUT after testing. The actual part can then be tested, while the expected receive vectors are taken from the Stimulus Log RAM, and the comparison results sent to an ECR, Tag RAM'"'"'s, etc., as usual. In this way the test program does not have to create or contain within itself the particular receive vectors that are the expected response from the applied stimulus.
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Citations
9 Claims
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1. A method of testing a memory under test on a memory tester, the method comprising the steps of:
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(a) applying the same sequence of transmit vectors to the memory under test and to a work memory within the memory tester, the sequence of transmit vectors causing the storing of test pattern data within the memories to which it is applied, the stored test pattern data in each memory being an end result remaining stored therein after the conclusion of the application of the entire sequence of transmit vectors; and
(b) subsequent to the conclusion of step (a), comparing the test pattern data content of the memory under test with the test pattern data content of the work memory. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification