Semiconductor integrated circuit device, has impedance controller to generate control codes that are variably related with impedance of external reference resistor, and termination circuit to terminate transfer line based on codes

摘要

#CMT# #/CMT# The device has an impedance controller (160) to generate control codes variably related with an impedance of an external reference resistor. An input circuit transfers an input signal to an internal circuit (140). A termination circuit (150) terminates the transfer line in response to the codes. An output circuit drives an output signal transfer line, and has impedance variably related with the codes. #CMT#USE : #/CMT# Semiconductor integrated circuit device. #CMT#ADVANTAGE : #/CMT# The device effectively adjusts the impedance control of the termination circuit and the off-chip driver. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a block diagram of a semiconductor memory device. 110 : Receiver 120 : Driver 140 : Internal circuit 150 : Termination circuit 160 : Impedance controller.