A method for data encoding, comprising: a) transmitting a first signal in a first polarity between first two of a first, second, and third conductors (A, B, C), leaving the remaining conductor open-circuited; b) transmitting a second signal in a second polarity between second two of said first, second, and third conductors, leaving the remaining conductor open-circuited, wherein the first polarity is different from the second polarity or the first two conductors are different than the second two conductors or the first polarity and the first two conductors are different from the second polarity and the second two conductors, and wherein step a) defines a first data encoding state with the first polarity and the first two conductors; step b) defines a second data encoding state with the second polarity and the second two conductors; and wherein transmitting the first signal includes: during a first of two sequential time intervals, open-circuiting the first conductor, and providing a voltage differential between the second conductor and the third conductor; and wherein transmitting the second signal includes: during a second of the two sequential time intervals, open-circuiting the second conductor and providing the voltage differential between the first conductor and the third conductor when data to be encoded at a transition between the two sequential time intervals has a first value, and open-circuiting the third conductor and providing the voltage differential between the first conductor and the second conductor when the data to be encoded at the transition between the two sequential time intervals has a second value. a) transmitting a first signal in a first polarity between first two of a first, second, and third conductors (A, B, C), leaving the remaining conductor open-circuited; b) transmitting a second signal in a second polarity between second two of said first, second, and third conductors, leaving the remaining conductor open-circuited, wherein the first polarity is different from the second polarity or the first two conductors are different than the second two conductors or the first polarity and the first two conductors are different from the second polarity and the second two conductors, and wherein open-circuiting the first conductor, and providing a voltage differential between the second conductor and the third conductor; and wherein transmitting the second signal includes: during a second of the two sequential time intervals, open-circuiting the second conductor and providing the voltage differential between the first conductor and the third conductor when data to be encoded at a transition between the two sequential time intervals has a first value, and open-circuiting the third conductor and providing the voltage differential between the first conductor and the second conductor when the data to be encoded at the transition between the two sequential time intervals has a second value. open-circuiting the second conductor and providing the voltage differential between the first conductor and the third conductor when data to be encoded at a transition between the two sequential time intervals has a first value, and open-circuiting the third conductor and providing the voltage differential between the first conductor and the second conductor when the data to be encoded at the transition between the two sequential time intervals has a second value.