Patent ID: 6073195
Filing Date: 2000-06-06
Classification: G06F

Abstract:
A bus controller controlling connection of a plurality of bus agents to a bus including a PCI bus, said bus controller controlling a bus bridge for selectively connecting said PCI bus and a host bus and comprising:a plurality of bus connectors in said bus respectively, and selectively, connecting said plurality of bus agents to said bus and disconnecting said plurality of bus agents from said bus;a bus connection controller monitoring said bus and controlling said plurality of bus connectors so as to disconnect any bus agent which is not accessed for a predetermined period of time; anda power supply voltage controller supplying a power supply voltage to each of said bus agents, said bus connection controller controlling said power supply voltage controller to reduce the power supply voltage supplied, or to stop supply of the power supply voltage, to any bus agent disconnected from said bus, said bus connection controller comprising:a request monitor unit monitoring respective requests from said plurality of bus agents to use said PCI bus and disconnecting from said bus any bus agent not issuing a respective request for a predetermined period of time, andsaid bus monitor unit monitoring a signal for controlling each of said plurality of bus connectors and a signal for granting a right to use the PCI bus, and canceling the grant of the right to use the PCI bus when said grant is issued to a disconnected bus agent.