Patent attributes
A memory is provided which simplifies the manufacturing process on the supplier side while satisfying specifications provided from the user side. An address space of a memory core includes an information storage region, a code region, and a no-write region. The information storage region includes a first region where no-write region information is written and a second region where a fixed value is written. Program code is written in the code region. The no-write region information indicates the position of the no-write region, and the fixed value indicates a fixed value that is intended to be written to the no-write region. The ROM selects between the fixed value and original read data that is obtained by a data selecting section directly from the memory core, and outputs the selected one as read data.
