Intel Corporation

Narender R Nagulapally

Sanjib Sarkar

Yun He

Fei Deng

Senthil Arun Singaravelu

Pranali Shah

Ivan Herrera Mejia

Ruchira K Liyanage

A serial input/output method and receiver include an receiver portion to receive an analog differential serial input and sample the input to provide data and error signals, an equalization feedback loop responsive to the data and error signals to adjust the receiver portion, a phase feedback mechanism separate from the equalization feedback loop to provide a phase error, and a clock data recovery block coupled to receive the phase error to perform timing recovery for the receiver portion independent of the equalization feedback to adjust the sampling.

Unequalized clock data recovery for serial I/O receiver

Methods and apparatus related to adaptive control loop protection for fast and robust recovery from low-power states in high speed serial I/O applications are described. In some embodiments, a first bit pattern is detected, at a first agent, that indicates a speculative entry by a second agent into a low power consumption state and one or more control loops are frozen. A second bit pattern is detected (after entering the low power consumption state) that indicates exit from the low power consumption state by the second agent and the one or more control loops are unfrozen (e.g., in a specific order). Other embodiments are also claimed and/or disclosed.

Adaptive control loop protection for fast and robust recovery from low-power states in high speed serial I/O applications

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Folsom, CA, United States of America

Narender R Nagulapally