Apparatus and methods structured with respect to a data bus having a number of data lines and a number of shield lines can be implemented in a variety of applications. Such apparatus and methods can include driver and receiver circuits that operate to generate and/or decode a data bit inversion signal associated with data propagated on data lines of the data bus. The driver and receiver circuits may be arranged to operate on a two bit basis to interface with the data bus having data lines grouped with respect to the two bits with shield lines for the respective two bit data lines.