Apparatuses to resolve roles for dual role serial bus devices

摘要

Methods and apparatuses relating to resolving roles for dual role serial bus devices are described. In one embodiment, an apparatus includes a serial bus receptacle to receive a serial bus plug of a device, a power supply electrically coupled to the serial bus receptacle, a multiple role toggling circuit to toggle the power supply between a power source role and a power sink role, wherein the device comprises a second power supply to toggle between a power source role and a power sink role, and a randomizer circuit to cause a plurality of different, toggling duty cycles and/or a plurality of different, toggling frequencies to be applied to the multiple role toggling circuit.