A semiconductor memory apparatus includes first and second byte pads. A left-side peri-line couples the first byte pad and a first memory bank region and a right-side peri-line couples the second byte pad and a second memory bank region. A peri-repeater couples the left-side peri-line and the right-side peri-line based on a peri-strobe signal. The peri-strobe signal is generated based on byte information and memory bank selection information.