Patent ID: 7952386

Claim:
A semiconductor device, comprising: an input multiplexing unit including a first input multiplexer for selectively multiplexing and supplying an input data from a data I/O pad to global I/O lines according to a data input operation mode and a second input multiplexer for selectively multiplexing and supplying the multiplexed input data on at least two global I/O lines to a local I/O line according to the data input operation mode; and an output multiplexing unit including a first output multiplexer for selectively multiplexing and supplying an output data from the local I/O line to the global I/O lines according to a data output operation mode and a second output multiplexer for selectively multiplexing and supplying the multiplexed output data on the global I/O lines to the data I/O pad according to the data output operation mode, wherein the data input operation mode and the data output operation mode are configured to change according to a change in a number of data bits that are to be simultaneously written or read from the semiconductor device at one time during a data input or output operation.