Boundary scan with ground bounce recovery

Details Boundary scan with ground bounce recovery Boundary scan with ground bounce recovery

2006-09-12

2006-09-12

Lamarre, Guy (Department: 2138)

Error detection/correction and fault detection/recovery

Pulse or data error handling

Digital logic testing

C714S002000

Reexamination Certificate

active

07107503

ABSTRACT:
A system for recovering from ground bounce during a boundary scan test is disclosed that includes operationally transitioning a Test Access Port controller from any of at least three undetermined controller states induced by the ground bounce to a determined controller state. The undetermined controller states may be selected from an UPDATE state, a RUN-TEST/IDLE state, a SELECT-DR-SCAN state, and a CAPTURE-DR state. The determined controller state can be the UPDATE-DR. Once in the determined controller state, the Test Access Port controller may also be operationally transitioned from an undetermined data state to a determined data state.

REFERENCES:
patent: 6000050 (1999-12-01), Komoda et al.
patent: 6012155 (2000-01-01), Beausang et al.
patent: 6243843 (2001-06-01), Parker et al.

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