Memory control method and memory control device

The invention provides a memory control method and a memory control device. The method carries out first-in first-out access control for a memory having a plurality of storage areas and comprises the steps of selecting, as writing positions, an address of a storage area in a storage block having at least one or more storage areas and an address of a storage area in a redundant block represented by a writing switch site of a plurality of redundant blocks which are made redundant with respect to the storage block and have at least one or more storage areas, wherein the writing switch site represents any one of a plurality of redundant blocks; selecting, as read positions, an address of a storage area of the storage block and an address selected by the selecting of the write position from among the addresses of a plurality of the redundant blocks when the read positions are selected to read data written by the writing of the data to the memory, wherein the number of storage areas for each one of a plurality of r