Semiconductor device to reduce energy consumed to write data

A semiconductor device comprising:

• a flip-flop;
• a nonvolatile storing section configured to store data held in the flip-flop;
• and
• a write control section configured to perform control to write the data held in the flip-flop to the nonvolatile storing section if, with supply of a source voltage or a ground voltage to the own device cut off, the data stored in the nonvolatile storing section does not coincide with the data held in the flip-flop, the write control section further performing control not to write the data held in the flip-flop to the nonvolatile storing section if the data stored in the nonvolatile storing section coincides with the data held in the flip-flop, wherein the write control section retains the data stored in the nonvolatile storing section, and performs the control based on a result of a comparison between the retained data and the data held in the flip-flop.