Patent ID: 8555121
Filing Date: 2013-10-08
Classification: G01R,G06F

Abstract:
1. An apparatus, comprising: an evaluation network coupled to evaluate one or more inputs during assertion of an evaluate pulse and to selectively discharge a dynamic node dependent upon the one or more inputs, wherein during a normal non-scan mode of operation, the evaluate pulse is derived from a clock signal and is asserted for a shorter duration than the clock signal is asserted; one or more output devices coupled to the dynamic node, wherein during operation, the one or more output devices drive an output node dependent upon the dynamic node; and one or more scan input devices coupled to load scan input data onto the output node in response to assertion of a master scan clock during a scan mode of operation; and a storage element coupled to receive and store a value of the output node in response to assertion of a slave scan clock during the scan mode of operation, wherein the storage element is further coupled to drive a scan data output.