| 摘要 |
PROBLEM TO BE SOLVED: To provide a novel and nonvolatile latch circuit and a semiconductor device using the latch circuit.SOLUTION: A semiconductor device comprises: a latch part having a loop structure in which an output of a first element is electrically connected to an input of a second element and an output of the second element is electrically connected to an input of the first element; and a data holding part for holding data, and the latch part and the data holding part compose a nonvolatile latch circuit. In the data holding part, a transistor which uses an oxide semiconductor as a semiconductor material for composing a channel formation region is used as a switching element. The semiconductor device further comprises an inverter electrically connected to a source electrode or a drain electrode of the transistor. By using the above-described transistor, data held by the latch part can be written in gate capacitance of the inverter or in separately prepared capacitance.SELECTED DRAWING: Figure 1 |
