Method of controlling memory, memory control circuit, storage device and electronic device

A method of controlling a memory including a first storage area and a second storage area, the method comprising:

• determining whether a writing request for the first storage area that stores data causes changing from a first logical value to a second logical value in the data stored in the first storage area;
• writing data corresponding to the writing request to the first storage area if the writing request does not cause changing from the first logical value to the second logical value in the data stored in the first storage area;
• and
• writing the first logical value to the second storage area which is different from the first storage area in response to the writing request if the writing request causes changing from the first logical value to the second logical value in the data stored in the first storage area.

A storage device comprising:

• a nonvolatile memory including a first storage area and a second storage area;
• and
• a memory control circuit that controls access to the memory, the memory control circuit including:
• a data decomposing circuit that determines, in response to a request for writing a write data string, whether the write data string changes a logical value stored in the memory from a first logical value to a second logical value and decomposes in accordance with a determination result, the write data string into first write data including a logical value that is located in a position of the write data string and does not change an existing logical value of the memory from the first logical value to the second logical value and second write data configured to write the first logical value in a position in which the changing from the first logical value to the second logical value is expected to occur;
• and
• an address converting circuit that converts an external address into a first internal address adapted to write the first write data to the first storage area and converts the external address into a second internal address adapted to write the second write data to the second storage area which is different from the first storage area in response to the writing request.

An electronic device comprising:

• a storage device;
• and
• a processor that writes a data string to the storage device,
• the storage device includes a nonvolatile memory including a first storage area and a second storage area, and a memory control circuit that controls access to the memory, wherein the memory control circuit includes:
• a data decomposing circuit that determines, in response to a request for writing a write data string, whether the write data string changes a logical value stored in the memory from a first logical value to a second logical value and decomposes in accordance with a determination result, the write data string into first write data including a logical value that is located in a position of the write data string and does not change an existing logical value of the memory from the first logical value to the second logical value and second write data configured to write the first logical value in a position in which the changing from the first logical value to the second logical value is expected to occur;
• and
• an address converting circuit that converts an external address into a first internal address adapted to write the first write data to the first storage area and converts the external address into a second internal address adapted to write the second write data to the second storage area which is different from the first storage area in response to the writing request.