PURPOSE: To easily design the electronic device where a signal is transmitted through a bus line and to reduce the power consumption in the standby state by increasing an allowable maximum reflection factor to take a large margin of input/-output standards.

CONSTITUTION: When the low level is outputted as data DQ and the voltage value of a bus line 75 is set to VOL1=Vref-0.6V, VOL2=Vref-0.1V is held as the voltage value of the bus line 75 by a latch circuit 85 in the standby state thereafter. When the high level is outputted as data DQ and the voltage value or the bus line 75 is set to VOH1=Vref+0 6V, VOH2=Vref+0.1V is held as the voltage value of the bus line 75 by the latch circuit 85 in the standby state thereafter.