RAMBUS DRAM

摘要

PURPOSE: A RAMBUS DRAM is provided to reduce power consumption by enabling a clock signal('tclk') to output internal data to the external only under a read or a current control command, by judging in advance whether an applied command is the read command or the current control command. CONSTITUTION: The RAMBUS DRAM includes: a signal generation unit generating the first clock signal to output internal data to the external by an SCP(Secondary Control Packet) packet of a read command or a current control command; a signal preservation unit maintaining the first clock signal as it is; and a control unit stopping the first clock signal if the applied command signal is either the read command nor the current control command. The signal generation unit includes: a signal generation part(100) generating a 'tclk' signal by making a 'tclk_en' signal 'HIGH' when one of a 'idhit_cas_ff1' signal and a 'idhit_cas_othr' signal is 'HIGH' under the read command or the current control command; a signal preservation part(20) to maintain the enabled 'tclk_en' signal continuously in case of the read command or the current control command; a control part(30) disabling the enabled 'tclk_en' signal again if the applied command signal is either the read command nor the current control command; and a logic circuit part(NA3) generating a 'tclk_en' signal only under the read command or the current control command by receiving an output signal(ten_in1_b) of the control part as an input.