Test circuit topology reconfiguration and utilization techniques

摘要

Among the embodiments of the present invention is a technique that includes executing a first protocol on test bus ( 40 ) in accordance with an established test standard to operate a first topology of several test ports ( 70 ) and activating to a shadow controller ( 60 ) by executing a second protocol on test bus ( 40 ). Operation of the test ports ( 70 ) is suspended during execution of the second protocol. During activation, the shadow controller ( 60 ) can be used to set-up a second topology of one or more of test ports ( 70 ) for operation after the test port suspension is discontinued.