Failsafe interface circuits are provided for an integrated circuit having a core logic section providing a signal to, or receiving a signal from, a bond pad connection. There is provided supporting means for keeping six single-core cables along at least a part of their length, in a substantially regular hexagonal configuration as seen in cross-section, and means for feeding current in parallel and with equal distribution to respective diametrically opposite cable conductive cores. In either case, the pattern of interference fit between the weather strip and the closure panel is then disclosed. The method further comprises receiving for each variable from the data node responsible for the variable a plurality of unique data values for the variable, a count for each of the unique data values and an overflow count for the variable, wherein the number of unique data values does not exceed the maximum number of levels.