Bus control device, image processing apparatus, and bus control method

Abstract

A bus control device includes a plurality of bus masters classified into a plurality of groups according to a priority level, a plurality of group buses each group bus being connected to a corresponding group of bus masters and assigned with a priority level determined according to the priority levels of the corresponding group of bus masters, an upper priority bus that arbitrates a plurality of bus obtaining requests received from the plurality of bus maters via the plurality of group buses, a plurality of masks respectively provided for the plurality of bus masters to mask the bus obtaining request addressed to the corresponding group bus from the corresponding bus master, and a plurality of mask controllers respectively provided for the plurality of group buses to output at least one mask signal that controls operation of at least one corresponding mask connected to the corresponding group bus.