A timing generator and method of developing drive signals which, when input sync signals are present, delivers the leading and trailing edges of the input pulses directly to a drive output and which generates a free-running signal when input sync pulses are not present. The electronic device is coupled to the flexible circuit board by a plurality of Z-interconnections. The gateway apparatus further includes means for determining whether or not it is possible to accept the input by making reference to the gateway apparatus information when the control command input is received through the outside network and for producing a control command to the appliance based on the appliance panel information when the acceptance is possible.