Patent ID: 7162556
Filing Date: 2007-01-09
Classification: G06F,Y02D

Abstract:
1. A matrix type bus connection system, comprising: a plurality of master devices for issuing connection request by outputting a target device address to each dedicated master bus; a plurality of slave devices for transferring data to the master device through dedicated slave bus; a low-power control circuit for controlling each slave device in low-power operation state; a plurality of decoders equipped with the plurality of master devices, respectively, such that each said decoder analyzes the address of the connection target slave device issued from the associated master device to specify the connection target slave device, and to output a connection request signal, said decoder also outputs a connection request signal to a predetermined default slave device in accordance to a control signal from the low-power control circuit, when connection request is issued from master device to the slave device in low-power operation state; a plurality of arbitration circuits equipped with the plurality of slave devices, respectively, such that said arbitration circuit controls connections between said master device and said slave device; a first selectors equipped with the plurality of master devices, respectively, such that said selector selects the bus of said slave device to connect the bus of associated master bus according to a first selection signal from the arbitration circuit; and a second selectors equipped with the plurality of slave device, respectively, such that said selector selects the bus of said master device to connect the bus to the associated slave bus according to a second selection signal from the arbitration circuit.