Signal Transmission Reducing Coupling Caused Delay Variation

摘要

A signaling bus having a plurality of adjacent logical lanes, each logical lane having an odd signal path and an even signal path. Driving circuitry drives each logical lane by transmitting, if data has changed from an immediately preceding cycle, a one cycle signal having a first transition direction on the even signal path on even cycles and transmitting a one cycle signal having the first transition direction on odd cycles. If data has not changed, transmitting a two cycle signal having a second transition direction on the even signal path on even cycles and transmitting a two cycle signal on the odd path having the second transition direction on odd cycles. Receiver circuitry alternates selection of the even cycle path and the odd cycle path to determine if data has changed from the immediately preceding cycle.

主权项

1. A method of driving a signaling bus having a plurality of logical lanes, each logical lane physically adjacent to at least one other logical lane, each logical lane having an even path and an odd signal path, the method comprising:
ensuring that a one cycle signal having a first transition direction transmitted on a first signal path in the signaling bus never encounters a one cycle signal having a second transition direction transmitted on an adjacent second signal path in the signaling bus.