Patent ID: 7058835
Filing Date: 2006-06-06
Classification: G06F

Abstract:
1. A method for powering a circuit board having a first circuit, a second circuit, a first power plane and a second power plane, the method comprising the steps of: while a power subsystem provides a main power signal to the first circuit through the first power plane, connecting the second power plane to the power subsystem such that the second circuit receives the main power signal through the second power plane; detecting a power failure event in which the power subsystem provides a backup power signal in place of the main power signal; and in response to the detected power failure event and while the power subsystem provides the backup power signal to the first circuit through the first power plane, disconnecting the second power plane from the power subsystem such that the second circuit does not receive the backup power signal; wherein the first circuit includes dynamic random access memory; and wherein the method further comprises the step of storing completed host transactions in the dynamic random access memory of the first circuit while the power subsystem provides the main power signal to the first circuit through the first power plane.