Self re-seeding linear feedback shift register (LFSR) data processing system for generating a pseudo-random test bit stream and method of operation
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United States of America Patent
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Jan 17, 1995
Grant Date -
N/A
app pub date -
Mar 30, 1994
filing date -
Mar 30, 1994
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A data processing system (10) has a test controller (12). The test controller (12) has a pattern generator (18) for receiving a seed value and generating many pseudo-random values from the seed value. A re-seed and compare circuit (22) monitors the pattern generator (12) and determined when the seed value repeats in the pseudo-random number sequence generated by the generator (18). Once circuit (22) determines that the seed value has repeated the control circuit (20) allows the generator (18) to clock once more and latches a new seed value into the circuit (22). Therefore, the pattern generator through the compare/store function of circuit (22) and the control of circuit (20) is self re-seeding and generates a longer string of pseudo-random numbers with minimal logic.
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