Abstract:
Described is an apparatus comprising: first and second processing cores; and a PCU which is operable to: generate a first VID for an off-die regulator external to the apparatus, the first VID resulting in a first power supply for the first processing core; and generate a second VID different from the first VID, the second VID resulting in a second power supply for the second processing core. Described is an apparatus comprising: a plurality of power-gate transistors controllable by a digital bus, the plurality of power-gate transistors operable to provide a first power supply to a processing core, and to receive a second power supply as input; an ADC to receive the first power supply and to generate a digital output representative of the first power supply; and a controller to receive the digital output representative and to generate the digital bus for controlling the plurality of power-gate transistors.
Abstract:
Inter-device communication with a pulse-amplitude modulation (PAM) signal can have at least two data eyes with different Vref levels. A physical interface (PHY) can be trained for the PAM signal by training a first data eye separately from the second data eye. The training can include adjusting the first Vref level separately from the second Vref level to center each reference voltage on its respective data eye.