System, methods, and apparatus are described that facilitate transmission/reception of data over a multi-line parallel bus. In an example, the apparatus transmits data bits over a parallel bus includes determining from a prior bus state, a plurality of free wires in the bus for a current bus state, where each free wire satisfies a crosstalk-avoidance constraint in the current bus state for all values of a bit transmitted on the free wire. The apparatus may encode a plurality of data bits using a crosstalk avoidance encoder to obtain a CAC-encoded word, compute an error detection or correction code for the CAC-encoded word, assign bits of the error detection or correction code to the plurality of free wires for transmission during the current bus state, and assign the CAC-encoded word to unassigned wires of the bus for transmission during the current bus state.