Changing settings for a transient period associated with a deterministic event

摘要

Disclosed embodiments relate to a system that changes transmitter and/or receiver settings to deal with reliability issues caused by a predetermined event, such as a change in a power state or a clock start event. One embodiment uses a first setting while operating a transmitter during a normal operating mode, and a second setting while operating the transmitter during a transient period following the predetermined event. A second embodiment uses similar first and second settings in a receiver, or in both a transmitter and a receiver employed on one side of a bidirectional link The first and second settings can be associated with different swing voltages, edge rates, equalizations and/or impedances.

主权项

1. A method for operating an integrated circuit transmitter, comprising:
operating an output driver of the transmitter during a normal operating mode, the output driver responsive to a first transmitter setting to generate an output signal for transmission along a signaling channel, the output signal exhibiting first signal characteristics; and operating the output driver during a transient period associated with a deterministic event, the output driver responsive to a second transmitter setting to alter the output signal to exhibit second signal characteristics that compensate for expected signal impairments during the transient period, wherein the second transmitter setting differs from the first transmitter setting, and wherein the first and second settings are from a group consisting of a voltage swing, and impedance level, a gain, a frequency cut-off and an equalization parameter.