A method and apparatus for capturing the internal state of an integrated
circuit (IC) for second and higher order speedpath-induced failures. The
method includes stretching one or more cycles of an internal clock signal
in order to mask a first order speedpath-induced failure (SIF), wherein
the internal clock signal is restored to operating at a normal speed
subsequent to masking the first order SIF. The internal clock signal may
be stopped at a cycle corresponding to a higher order SIF. After stopping
the internal clock signal, test output data may be loaded into a scan
chain. The method may also be used in conjunction with a laser or other
device for other test enhancements.