AUTOMATICALLY DETECTING AND ROUTING OF TEST SIGNALS

摘要

A circuit testing approach involves configurable switch control for automatically detecting and routing test signals along a plurality of test circuit paths (240, 242, 244). According to an example embodiment of the present invention, a microcontroller (205) is programmed to monitor input nodes (210) using an interrupt routine for automatically detecting test signals (i.e., digital and/or JTAG test signals). Upon the detection of the test signals, the microcontroller controls a controllable switch (220) for routing the test data along one of the test circuit paths. With this approach, manual switching for routing the test signals is not necessary, which has been found to be useful in applications where access to the circuit paths for switching is difficult or impossible.