Event recognition by a state machine whose state is dependent up

Details Event recognition by a state machine whose state is dependent up Event recognition by a state machine whose state is dependent up

1998-06-10

2000-08-15

Sheikh, Ayaz R.

Electrical computers and digital data processing systems: input/

Intrasystem connection

710 19, 714 39, 714 45, 714 51, 714819, 714822, G06F 1122

Patent

active

061050873

ABSTRACT:
A data-analyzing unit monitors and/or analyzes events on an information bus. The data-analyzing unit comprises an event recognition unit with one or more comparators coupled to the information bus and a sequencer state machine for determining sequential dependencies of events, whereby a state of the sequencer state machine depends on the history of information as provided thereto. The data-analyzing unit preferably comprises one or more counters coupled to the event recognition unit, thus allowing an analysis of data and/or events on the information bus. The data-analyzing unit may also comprise one or more memories coupled to the event recognition unit, thus providing a trace memory. In a preferred embodiment, the event recognition unit of the data-analyzing unit provides customized rules for monitoring defined event sequences of event behaviors thus allowing the monitoring of defined event sequences of event behaviors and possibly the drawing of conclusions therefrom e.g. by signaling an unwanted event behavior. The data-analyzing unit according to the invention is preferably used in a logic analyzer.

REFERENCES:
patent: 4802103 (1989-01-01), Faggin et al.
patent: 5457694 (1995-10-01), Smith
patent: 5521967 (1996-05-01), Novas et al.
patent: 5596749 (1997-01-01), Cantrell et al.
patent: 5642479 (1997-06-01), Flynn
patent: 5983164 (1999-11-01), Ocondi

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