Power Management System Using Blocker Modules Coupled to a Bus

摘要

Systems and methods are provided for efficiently powering down elements and buses of a system without negatively impacting traffic. A power manager receives information from subsystems and determines whether a particular subsystem or bus can be powered down. The power manager sends a message to a subsystem when the subsystem or bus can be safely powered down. Blocker modules are coupled to buses, and the blocker modules respond with an error message if a subsystem attempts to send data over an inactive bus.

主权项

1. A system, comprising:
a first subsystem comprising a blocker module; a bus coupled to the blocker module; and a power manager coupled to the first subsystem, wherein the power manager is configured to:
designate a master of the bus, andconfigure the blocker module to:
detect an attempt to send data over the bus by a second subsystem, wherein the second subsystem is not the master of the bus,block the attempt to send data, andsend an error message to the second subsystem.