Sequence of events detector for serial digital data which select

Details Sequence of events detector for serial digital data which select Sequence of events detector for serial digital data which select

1988-11-28

1993-05-25

Lee, Thomas C.

Boots, shoes, and leggings

3649446, 36494392, 3649472, 3649492, 364DIG2, G06F 900

Patent

active

052147843

ABSTRACT:
A sequence of events detector provides a way to continuously monitor serial digital data and precisely define the behavior that it must exhibit in order to qualify as the sequence of events that the user wishes to detect. A plurality of evaluation windows each sequentially examine the behavior of one or more signals, comparing this behavior with predefined criteria. Each evaluation window is activated to begin its portion of the overall evaluation process by a match signal from the preceding window, indicating that its predefined criteria were met. In one version, a sequence starting circuit activates the first evaluation window in response to an external signal or the occurrence of a predefined condition, and a multiplexer trigger source circuit selects as the overall detector output the match signal output of the last evaluation window used to define the overall sequence of events. In another version, each evaluation window explicitly reports a failure if its predefined criteria are not met.

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