Run-length detection and correction

摘要

System, methods and apparatus are described that facilitate transmission of data, particularly between two devices within electronic equipment. The apparatus may determine whether a run-length violation will occur or is likely to occur if a first sequence of symbols provided by a mapper of an M-Wire N-Phase encoder is transmitted on a plurality of wires. A second sequence of symbols may be substituted for the first sequence of symbols. The second sequence of symbols may comprise a surplus sequence of symbols that is not used for mapping data in the mapper.

主权项

1. A data transfer method comprising:
at a transmitting device coupled to a three-wire interface, mapping data to a first sequence of symbols representing phase transitions and polarity transitions of a three-phase signal that is transmitted on each wire of the three-wire interface, wherein the three-phase signal transmitted on each wire of the three-wire interface is 120 degrees out-of-phase with the three-phase signals transmitted on the other two wires of the three-wire interface; at the transmitting device, determining that the first sequence of symbols is associated with a run-length violation on at least one wire of the three-wire interface; at the transmitting device, substituting a second sequence of symbols for the first sequence of symbols, wherein the second sequence of symbols comprises a surplus sequence of symbols that is not one of a plurality of valid sequences of symbols used by the transmitting device for mapping data; and at the transmitting device, controlling phase and polarity of the three-phase signal that is transmitted on each wire of the three-wire interface in accordance with the second sequence of symbols, wherein a run-length violation occurs when the at least one wire remains in a same signaling state during transmission of a predefined number of successive symbols, wherein during transmission each symbol defines a signaling state of each wire in the three-wire interface.