To provide a technique to perform readout/write access to a memory at high speed.

A memory controller 4 can perform readout/write access to a memory 3 by hardware control of the memory controller 4 not by means of software control of a host system 1. The memory controller 4 can make the host system 1 and the memory 3 perform processing with a timing suitable for each characteristic by dissolving a handshake of the host system 1 and the memory 3. Consequently, the memory controller 4 can perform readout/write access at high speed.