A radio frequency controller device enables the utility of a target to be
controlled using an RF communication. The radio frequency controller
device has a switch that is set to a defined state responsive to the RF
communication. More particularly, conditional logic circuitry uses the RF
communication to determine if the target's utility should be changed, and
sets the state of the switch accordingly. The radio frequency controller
device also has a target interface that allows the target to determine
the state of the switch, and based on the state of the switch, a
different utility will be available for the target. The radio frequency
controller device also has an antenna for the RF communication, as well
as a demodulator/modulator circuit. When used to control the utility of
an electrical or electronic device, the radio frequency controller device
has a low-power circuit portion that is used to set the state of the
switch responsive to the RF communication, and also has a full power
circuit portion that communicates with the target. In this way, the state
of the switch may be set when the target is in a power-off condition, and
the target is able to determine the state of the switch when the target
is activated.