Patent ID: 7245148

Claim:
A circuit in an integrated circuit having an input terminal to be coupled to a resistor network for selecting one of a plurality of digital states in the integrated circuit, the circuit comprising: the first input terminal receiving an input voltage having a first voltage value being one of a plurality of predetermined programming voltage values, each predetermined programming voltage value being associated with one of the plurality of digital states; a voltage decode circuit for receiving the input voltage and generating a signal indicative of the voltage value of the input voltage; a control circuit receiving the signal from the voltage decode circuit and generating an output control signal based on the signal from the voltage decode circuit, the output control signal selecting one of the plurality of digital states; and a power-up control circuit for providing power to the resistor network, the voltage decode circuit and the control circuit for determining the selected digital state and for disconnecting power to the resistor network, the voltage decode circuit and the control circuit after the selected digital state is determined.