Patent ID: 7581124
Filing Date: 2009-08-25
Classification: G11C,H03K

Abstract:
1. A system including an integrated circuit (IC) device, the IC device comprising: a power rail to provide a supply voltage; a plurality of logic blocks; a plurality of gating circuits, each coupled between the power rail and a power terminal of a corresponding logic block and having a control terminal to receive a corresponding control signal, wherein the gating circuits are configured to selectively adjust an operating voltage provided to the logic blocks in response to the control signals; a memory circuit for storing the control signals; a test pin set to receive a test signal set comprising the control signals; and a test circuit including a boundary scan register coupled to the test pin set and coupled to the memory circuit, wherein the test circuit is configured to write the control signals received from the test pin set into the memory circuit, wherein the test pin set does not receive data signals used to program the plurality of logic blocks.