Apparatus and method for testing non-deterministic device data
First Claim
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1. Automatic test equipment for testing non-deterministic packet data from a device-under-test, the automatic test equipment including:
- a memory for storing expected packet data;
a receiver for receiving actual packet data from the device-under-test; and
a data validation circuit coupled to the receiver for validating the non-deterministic packet data based on the expected packet data from the memory, the data validation circuit comprising a first-in-first-out circuit having an input coupled to the receiver and a match circuit having a first input coupled to the first-in-first-out circuit and a second input coupled to the memory.
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Abstract
Automatic test equipment for testing non-deterministic packet data from a device-under-test is disclosed. The automatic test equipment includes a memory for storing expected packet data and a receiver for receiving the packet data from the device-under-test. A data validation circuit is coupled to the receiver for validating non-deterministic packet data based on the expected packet data from the vector memory.
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Citations
18 Claims
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1. Automatic test equipment for testing non-deterministic packet data from a device-under-test, the automatic test equipment including:
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a memory for storing expected packet data; a receiver for receiving actual packet data from the device-under-test; and a data validation circuit coupled to the receiver for validating the non-deterministic packet data based on the expected packet data from the memory, the data validation circuit comprising a first-in-first-out circuit having an input coupled to the receiver and a match circuit having a first input coupled to the first-in-first-out circuit and a second input coupled to the memory. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. Automatic test equipment for testing non-deterministic packet data from a device-under-test, the automatic test equipment including:
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means for storing expected packet data; means for receiving actual packet data from the device-under-test; and means for validating the non-deterministic packet data based on the expected packet data from the means for storing, the means for validating comprising a first-in-first-out circuit having an input coupled to the means for receiving and a match circuit having a first input coupled to the first-in-first-out circuit and a second input coupled to the means for storing. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A method for testing non-deterministic packet data using automatic test equipment having a memory for storing expected packet data, the method comprising:
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receiving actual packet data from a device-under-test; sequencing the actual packet data through a first-in-first out circuit; comparing, in the order received, each actual packet data to the expected packet data in the memory; and validating the non-deterministic packet data based on the comparing step. - View Dependent Claims (15, 16, 17)
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18. A method for validating non-deterministic packet data from a device-under-test using automatic test equipment, the automatic test equipment having a memory, the method comprising:
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establishing a library of known signatures in the memory, wherein the known signatures are passing signatures, failing signatures or both; testing the device-under-test; generating a signature of actual packet data captured during the testing step; comparing the generated signature from the captured data to the library of known signatures; determining a pass/fail result for the device test if the compared signature matches at least one known signature in the library; evaluating the captured data to determine whether the device passed/failed if the compared signature does not match at least one known signature in the library; generating a new signature for the evaluated captured data; and adding the new signature to the library of known signatures.
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Specification