Synchronized two-way direct current (DC) data-bus-inversion encoding for simultaneous bi-directional signaling

A communication system comprising:

• a first plurality of transceivers coupled to a plurality of data lanes;
• a first encoder coupled to the first plurality of transceivers;
• a second plurality of transceivers coupled to the plurality of data lanes;
• and
• a second encoder coupled to the second plurality of transceivers;
• wherein the first encoder is to, responsive to detecting a transmission signal to begin a transmission mode:
• determine that a first plurality of bits to be transmitted by the first plurality of transceivers over the plurality of data lanes comprise over fifty percent of a first binary value;
• generate a first data-bus-inversion (DBI) polarity signal that alternates in polarity;
• generate a first plurality of DBI-encoded bits of the first plurality of bits based on the first DBI polarity signal;
• and
• cause the transmission signal to be transmitted to the second encoder;
• and
• wherein the second encoder is to, responsive to receipt of the transmission signal, initiate DBI encoding of a second plurality of bits to be transmitted by the second plurality of transceivers over the plurality of data lanes.

A method of operating a communication system comprising a first plurality of transceivers coupled to a second plurality of transceivers via a plurality of data lanes, and a first encoder coupled to the first plurality of transceivers, wherein the method comprises:

• determining, by the first encoder, in response to a transmission signal that initiates a transmission mode, a first plurality of bits to be transmitted by the first plurality of transceivers over the plurality of data lanes comprise over fifty percent of a first binary value;
• generating, by the first encoder, a first data-bus-inversion (DBI) polarity signal that alternates in polarity;
• generating, by the first encoder, a first plurality of DBI-encoded bits of the first plurality of bits based on the first DBI polarity signal;
• and
• causing, by the first encoder, the transmission signal to be transmitted to a second encoder coupled to the second plurality of transceivers, the transmission signal to synchronize DBI encoding between the first and second encoders.