| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a semiconductor integrated circuit device to enable setting of a ROM area and a RAM area by a user of an FRAM to be combined with a CPU and to enable setting and changing of the setting in a data writing operation. SOLUTION: In a microcomputer system having the CPU, a ferroelectric memory and an I/O unit, the ferroelectric memory is constituted, so that discrimination bits to decide whether a prescribed data string is made to be rewritable by each prescribed data string to data to be written and an area where data rewrite is prohibited is set in the ferroelectric memory by the discrimination bits.</p> |
