Patent ID: 9689920
Date: 2017-06-27
CPC Classifications: G01R,G06F

Claim:
1. A method for determining unknown sources in a circuit design for exclusion from logic built-in self test (LBIST) verification for the circuit, the method comprising: initializing, by one or more computer processors, one or more nets contained in an initial nets list, wherein the initial nets list is a representation of a circuit design being tested; removing, by one or more computer processors, the one or more nets initialized in response to initialization of each of one or more latches in one or more test channels of the circuit design being tested; determining, by one or more computer processors, whether a latch of the one or more latches is corrupted by an unknown source; determining a second nets list, wherein determining the second nets list includes collecting each of one or more nets that are free of unknown sources; and removing, by one or more computer processors, each of the one or more nets that are free of unknown sources from the initial nets list to avoid consideration of those known sources during unknown source detection.