Patent ID: 7568141
Filing Date: 2009-07-28
Classification: G01R,G11C

Abstract:
1. Apparatus comprising: a scan cell operative to function as a capture storage element in a boundary scan test mode, the scan cell having a data input node, a clock input node, a scan in input node, and an output node; an update storage element having an output node and an input node coupled to the output node of the scan cell; an input multiplexer coupled to the data input node of the scan cell, the input multiplexer operative to select between a functional input and a boundary scan test input; a clock multiplexer coupled to the clock input node of the scan cell, the clock multiplexer operative to select between a boundary scan test clock signal and a system clock signal; and an output multiplexer operative to select between the functional input, a signal from the scan cell output node, and the update storage element output node for output.