Methods and apparatus for scrambling symbols over multi-lane serial interfaces

摘要

Methods and apparatus for scrambling symbols over multi-lane serial interfaces in order to improve undesired electromagnetic emissions. In one embodiment the scrambling is based on a seed value associated with each lane. In a second embodiment, the scrambling values are selected from various taps of a scrambling component, where the selection is based on the associated lane. In still a third embodiment, each lane is associated with a distinct scrambling component.

主权项

1. An apparatus configured to scramble a plurality of symbols, comprising:
a first interface that comprises a plurality of lanes, where in a legacy mode each lane is characterized by a common scrambling mechanism and in a non-legacy mode each lane is characterized by a corresponding distinct scrambling mechanism; a processor in data communication with the first interface; and a non-transitory computer-readable medium comprising one or more instructions, which when executed by the processor, causes the apparatus to:
when in the non-legacy mode:
transmit a plurality of symbols via the plurality of lanes; andwherein the plurality of symbols are configured to be descrambled by a receiver, responsive to reception of the plurality of symbols; andwhen in the legacy mode:
transmit another plurality of symbols compatible with legacy systems via the plurality of lanes; andwherein the another plurality of symbols compatible with legacy systems is configured to be descrambled by the receiver, responsive to reception of the another plurality of symbols compatible with legacy systems.