Semiconductor device

摘要

The data in a volatile memory may conventionally be lost even in case of a very short time power down or supply voltage drop such as an outage or sag. In view of the foregoing, an object is to extend data retention time even with a volatile memory for high-speed data processing. Data retention time can be extended by backing up the data content stored in the volatile memory in a memory including a capacitor and an oxide semiconductor transistor.

主权项

1. A semiconductor device comprising a memory cell including:
a memory; a first transistor including an oxide semiconductor layer; a first capacitor; and a switch, wherein an output port of the memory is electrically connected to one terminal of the switch, wherein the other terminal of the switch is electrically connected to one of a source and a drain of the first transistor, and wherein the other of the source and the drain of the first transistor is electrically connected to the first capacitor.