Interface conversion circuitry for universal chiplet interconnect express (ucie)

Abstract

An integrated circuit (IC) chip includes a Universal Chiplet Interconnect express (UCIe) interface circuit for transferring UCIe signals. The UCIe interface circuit includes a mainband sub-interface for transferring mainband signals and a sideband sub-interface for transferring sideband signals along a first number of sideband signal paths. A bump interface includes a second number of sideband bumps, each of the sideband bumps for coupling to a signal link. The second number of sideband bumps is less than the first number of sideband signal paths. A converter circuit is disposed between the UCIe interface circuit and the bump interface. The converter circuit includes a receiver circuit to receive first sideband data from the sideband sub-interface. The receiver circuit includes local clock circuitry, oversampling circuitry, and majority detection circuitry to receive oversampled data and to resolve states of sideband data bits based on a majority voting process.