Patent ID: 8719598
Filing Date: 2014-05-06
Classification: G06F

Abstract:
1. An apparatus comprising: an integrated circuit having a plurality of power domains implemented thereon, wherein each of the plurality of power domains is responsive to receiving power from a respective one of a plurality of power supplies; and a plurality of serially-coupled power-sensing units including a first power-sensing unit and a second power-sensing unit implemented on the integrated circuit, wherein the first power-sensing unit is coupled to receive a first signal indicating that at least a first one of the plurality of power domains is receiving power from its respective one of the plurality of power supplies, wherein the first power-sensing unit is implemented in and is configured to sense power in a second one of the plurality of power domains, and wherein the first power-sensing unit is configured to assert a second signal in response to the first signal and sensing power in the second one of the plurality of power domains, wherein the second power-sensing unit is coupled to receive the second signal.