Storage device providing direct memory access, computing system including the storage device and operating method of the storage device

Abstract

A storage device includes a memory controller, a buffer memory, and a memory device including a plurality of non-volatile memory devices connected to the memory controller via an identical channel. The memory controller is configured to generate a first command for performing a first DMA operation and a second command for performing a second DMA operation, adjust an output time interval between a first output time point of the first command with respect to a first non-volatile memory device among the plurality of non-volatile memory devices and a second output time point of the second command with respect to a second non-volatile memory device among the plurality of non-volatile memory devices, and is configured to add a time interval corresponding to the output time interval between an end time point of the first DMA operation corresponding to the first command and a start time point of the second DMA operation corresponding to the second command.