Issue No. 01 - January/February (2001 vol. 21)
DOI Bookmark: http://doi.ieeecomputersociety.org/10.1109/40.903063
This low-cost digital technique uses differential sensing, requires only a single pin per signal, and is based on detecting a change/no change state from the preceding state.
E. Haq et al., "JAZiO Signal-Switching Technology: A Low-Cost Digital I/O for High-Speed Applications," in IEEE Micro, vol. 21, no. , pp. 72-81, 2001.