Memory device for controlling nonvolatile and volatile memories

摘要

A memory device includes a nonvolatile memory (105) capable of storing data, a volatile memory (106) capable of being random-accessed, and a controller (104) for transferring data between the nonvolatile memory and the volatile memory and enabling a pseudo access as if the volatile memory were externally directly accessed in accordance with an instruction through an external bus (123) when the data transfer is not performed.