Patent ID: 8018992
Filing Date: 2011-09-13
Classification: H04L

Abstract:
1. A method comprising: communicating control information for an adaptive equalization process for a channel coupled between a transmitter and a receiver from an agent external to the transmitter and the receiver, the agent including application code and an in-circuit test probe; controlling tap settings of an equalizer of at least one of the transmitter and the receiver responsive to the control information; generating a data pattern using a built-in self test unit of the transmitter and transmitting the data pattern from the transmitter to the receiver along the channel; and measuring an initial eye quality of the data pattern in the receiver using an on-die scope of the receiver and adjusting the tap settings, the built-in self test unit, the on-die scope, and the tap settings adjusting controlled by the agent, wherein the agent is to determine an initial cost based on a difference between an updated eye quality measured after adjusting the tap settings and the initial eye quality, and increment the tap settings if the initial cost is greater than a predetermined noise cost.