GLOBAL INPUT/OUTPUT LINE SELECTION UNIT

摘要

PURPOSE: A global input/output line selection unit is provided to improve an input and an output operation of data by controlling directly enable timing of a global input/output line selection control signal. CONSTITUTION: A buffering portion(42) is used for receiving an external address signal(ext_add) and buffering the received address signal to a predetermined potential level. An address selection portion(44) is used for receiving each data bus line sense amplifier strobe from a multitude of bank and performing a latching operation by transferring selectively an address signal(gay) received from the buffering portion(42). The address selection portion(44) is controlled by a pipe input strobe signal generated from combination of the received signals. A drive portion(46) is used for generating a control signal(gio_sel) by selecting an input/output line of a bank corresponding to the address signal(gay_d) of the address selection portion(44). The address selection portion(44) is formed with an address transfer portion(47) and an address latch portion(48).