Semiconductor device, electronic component, and electronic device

A semiconductor device comprising:

• a memory cell array comprising a memory cell, the memory cell comprising a volatile memory and a nonvolatile memory portion;
• a first circuit for writing and reading data in the volatile memory;
• a second circuit for backing up the data in the nonvolatile memory portion;
• a third circuit for generating and supplying power supply voltages to the memory cell array, the first circuit, and the second circuit,
• a first switch connecting the memory cell to the third circuit;
• a second switch connecting the first circuit to the third circuit;
• a third switch connecting the second circuit to the third circuit;
• and
• a fourth circuit for controlling on and off of the first to third switches,
• wherein the fourth circuit is configured to turn off the first switch while the second and third switches are turned on.

A method for driving a semiconductor device, the method comprising:

• writing data to a volatile memory by a first circuit, wherein a memory cell array comprising a memory cell comprising the volatile memory and a nonvolatile memory portion;
• backing up the data stored in the volatile memory to the nonvolatile memory portion by a second circuit;
• supplying power supply voltages from a third circuit to the memory cell array, the first circuit, and the second circuit;
• and
• stopping a supply of the power supply voltage to the memory cell array while the first circuit and the second circuit are supplied with the power supply voltages.

A method for driving a semiconductor device, the method comprising:

• writing data to a volatile memory from a first circuit, wherein a memory cell array comprising a memory cell comprising the volatile memory and a nonvolatile memory portion;
• backing up the data stored in the volatile memory to the nonvolatile memory portion by a second circuit;
• supplying power supply voltages from a third circuit to the memory cell array through a first switch, the first circuit through a second switch, and the second circuit through a third switch;
• and
• turning off the first switch while the second and third switches are turned on.