Patent ID: 6967500

Claim:
An electronic circuit comprising: at least one circuit block; a plurality of signal pads coupled to the circuit block; a plurality of programmable termination circuits, each associated with a corresponding one of the signal pads; and a reference circuit operative to generate one or more control signals for application to the programmable termination circuits; a given one of the programmable termination circuits being configurable independently of at least one of the other programmable termination circuits into one of a plurality of termination states, wherein the given one of the programmable termination circuits comprises: a selection circuit having a first input adapted to receive a set of default signals and a second input adapted to receive a set of reference control signals from the reference circuit, the selection circuit being adapted to select one of the sets of signals for delivery to an output of the selection circuit; a first logic circuit having an input coupled to the output of the selection circuit, the first logic circuit being adapted to control an amount of resistance provided between the associated signal pad and a first supply terminal, responsive to the selected set of signals at the output of the selection circuit; and a second logic circuit having an input coupled to the output of the selection circuit, the second logic circuit being adapted to control an amount of resistance provided between the associated signal pad and a second supply terminal, responsive to the selected set of signals at the output of the selection circuit.