Abstract: Semiconductor systems are provided. The semiconductor system includes a controller and a semiconductor device. The controller is suitable for generating command signals and address signals. The semiconductor device is suitable for electrically disconnecting a first local line from a second local line in response to an input control signal enabled in a read mode. The read mode is set according to a logic combination of the command signals. Further, the semiconductor device is suitable for sensing and amplifying a data on the first local line or the second local line according to the address signals to output the amplified data through an input/output line.

Abstract: A burst length control circuit includes a burst length input circuit that outputs a mode register burst length signal and a burst length on-the-fly signal, a burst length generator circuit that outputs a burst length signal, and a burst length adjuster that delays the burst length signal by a write latency time to produce a write burst length control signal. A selection circuit selects any one of the burst length signal and the write burst length control signal according to a write read command signal and an on-the-fly signal received from the burst length input circuit, and outputs a burst length control signal. A burst stop counter counts the burst length control signal according to an internal write command signal and an internal read command signal, and outputs a burst stop signal corresponding to a selected burst length.