Patent ID: 8832471
Filing Date: 2014-09-09
Classification: G06F,H04L

Abstract:
1. A power management system, comprising: a central processing unit; an interconnection bus; a plurality of functional circuits corresponding to distinct power domains, able to communicate with each other, with the central processing unit, or both, via the interconnection bus, wherein the plurality of functional circuits includes a slave functional circuit and an associated master functional circuit; and a terminator circuit associated with a power domain of the slave functional circuit, and configured to be substituted for the slave functional circuit when the power to the power domain of the slave functional circuit is turned off by the central processing unit, and to signal an error to the master functional circuit in response to a request of a transaction that is in progress between the slave functional circuit and the master functional circuit at the moment the power is turned off; wherein the terminator circuit is decoupled from the interconnection bus when the slave functional circuit is coupled to the interconnection bus; and wherein the slave functional circuit is decoupled from the interconnection bus when the terminator circuit is coupled to the interconnection bus.