Patent ID: 7138814
Filing Date: 2006-11-21
Classification: G01R

Abstract:
1. An apparatus comprising: an integrated circuit die comprising an internal signal pad arranged at a location away from a periphery of the die, a peripheral signal pad arranged proximate the periphery of the die, and a switch coupled between the internal signal pad and the peripheral signal pad; the switch being configurable in at least a first state in which the internal signal pad is not operatively connected to the peripheral signal pad, and a second state in which the internal signal pad is operatively connected to the peripheral signal pad; the switch being configurable in one of the first and second states responsive to a control signal having one of first and second signal characteristics, respectively; wherein the switch is configured in the first state during normal operation of the integrated circuit die; wherein the switch is configured in the second state to permit test access to the internal signal pad via the peripheral signal pad; wherein the integrated circuit die further comprises a control circuit configured to generate the control signal for controlling the state of the switch; and wherein the control circuit comprises at least one inverter, an output of the inverter being coupled to a control signal input of the switch.