Address generating circuit and address generating method

An address generating circuit according to an embodiment includes a register that maintains a partition address set by a CPU, a comparator that determines whether a designated address designated by the CPU designates the interleaved area or the non-interleaved area, a selection signal generating unit that generates the selection signal based on a least significant bit of the designated address in a case of the interleaved area and generates the selection signal based on a high-order bit other than the least significant bit of the designated address in a case of the non-interleaved area, and a physical address generating unit that generates the physical address acquired by excluding the least significant bit from the designated address in a case of the interleaved area and generates the physical address acquired by excluding the high-order bit from the designated address in a case of the non-interleaved area.