Semiconductor storage device, data write method and data read method

A data write method including:

• an arithmetic operation of generating a different error detecting code depending on the information of a memory address, using the data and the information of said memory address in a memory cell into which said data is written;
• and
• writing said data and said error detecting code into said memory cell.

A data read method including:

• reading the data and an error detecting code stored in a memory cell from said memory cell designated at a memory address;
• and making an arithmetic operation of generating an address error detecting code corresponding to said memory address from said memory address, and generating a data error detecting code corresponding to said data from said error detecting code and said address error detecting code.